#!/usr/bin/env python3
"""
Tests for the subagent delegation tool.

Uses mock AIAgent instances to test the delegation logic without
requiring API keys or real LLM calls.

Run with:  python -m pytest tests/test_delegate.py -v
   or:     python tests/test_delegate.py
"""

import json
import os
import threading
import time
import types
import unittest
from unittest.mock import MagicMock, patch

from tools.delegate_tool import (
    DELEGATE_BLOCKED_TOOLS,
    DELEGATE_TASK_SCHEMA,
    DelegateEvent,
    _get_max_concurrent_children,
    _load_config,
    delegate_task,
    _build_child_agent,
    _build_child_progress_callback,
    _build_child_system_prompt,
    _strip_blocked_tools,
    _resolve_child_credential_pool,
    _resolve_delegation_credentials,
)


def _make_mock_parent(depth=0):
    """Create a mock parent agent with the fields delegate_task expects."""
    parent = MagicMock()
    parent.base_url = "https://openrouter.ai/api/v1"
    parent.api_key="***"
    parent.provider = "openrouter"
    parent.api_mode = "chat_completions"
    parent.model = "anthropic/claude-sonnet-4"
    parent.platform = "cli"
    parent.providers_allowed = None
    parent.providers_ignored = None
    parent.providers_order = None
    parent.provider_sort = None
    parent._session_db = None
    parent._delegate_depth = depth
    parent._active_children = []
    parent._active_children_lock = threading.Lock()
    parent._print_fn = None
    parent.tool_progress_callback = None
    parent.thinking_callback = None
    return parent


class TestDelegateRequirements(unittest.TestCase):

    def test_schema_valid(self):
        self.assertEqual(DELEGATE_TASK_SCHEMA["name"], "delegate_task")
        props = DELEGATE_TASK_SCHEMA["parameters"]["properties"]
        self.assertIn("goal", props)
        self.assertIn("tasks", props)
        self.assertIn("context", props)
        # toolsets is intentionally NOT exposed to the model — subagents always
        # inherit the parent's toolsets. Letting the model name toolsets was a
        # capability-selection surface the model should not control.
        self.assertNotIn("toolsets", props)
        self.assertNotIn("toolsets", props["tasks"]["items"]["properties"])
        # max_iterations is intentionally NOT exposed to the model — it's
        # config-authoritative via delegation.max_iterations so users get
        # predictable budgets.
        self.assertNotIn("max_iterations", props)
        # ACP subprocess transport is operator-controlled via config.yaml, not
        # model-controlled via delegate_task arguments.
        self.assertNotIn("acp_command", props)
        self.assertNotIn("acp_args", props)
        self.assertNotIn("acp_command", props["tasks"]["items"]["properties"])
        self.assertNotIn("acp_args", props["tasks"]["items"]["properties"])
        self.assertNotIn("maxItems", props["tasks"])  # removed — limit is now runtime-configurable

class TestChildSystemPrompt(unittest.TestCase):
    def test_goal_only(self):
        prompt = _build_child_system_prompt("Fix the tests")
        self.assertIn("Fix the tests", prompt)
        self.assertIn("YOUR TASK", prompt)
        self.assertNotIn("CONTEXT", prompt)

class TestStripBlockedTools(unittest.TestCase):
    def test_removes_blocked_toolsets(self):
        result = _strip_blocked_tools(["terminal", "file", "delegation", "clarify", "memory", "code_execution"])
        self.assertEqual(sorted(result), ["code_execution", "file", "terminal"])

    def test_strips_cronjob_toolset(self):
        """Regression for issue #43466: child subagents must not inherit
        the cronjob toolset from a parent running on a gateway platform.
        Without this guard, a delegated child could schedule new cron jobs
        under the parent's identity.
        """
        result = _strip_blocked_tools(
            ["terminal", "file", "cronjob", "web"]
        )
        self.assertNotIn("cronjob", result)
        self.assertIn("terminal", result)
        self.assertIn("file", result)
        self.assertIn("web", result)

    def test_mixed_composite_is_subtracted_at_child_assembly(self):
        """A mixed platform bundle must not re-expose blocked leaf tools.

        ``hermes-cli`` contains both allowed tools and every sensitive
        delegate tool, so it cannot be dropped wholesale. Child construction
        must instead pass exact one-tool deny toolsets to AIAgent, where
        model_tools applies them after resolving the composite.
        """
        import model_tools

        parent = _make_mock_parent()
        parent.enabled_toolsets = ["hermes-cli"]
        parent.disabled_toolsets = ["browser"]

        with patch("run_agent.AIAgent") as MockAgent:
            MockAgent.return_value = MagicMock()
            _build_child_agent(
                task_index=0,
                goal="Inspect safely",
                context=None,
                toolsets=None,
                model=None,
                max_iterations=10,
                parent_agent=parent,
                task_count=1,
                role="leaf",
            )

        _, kwargs = MockAgent.call_args
        disabled = kwargs["disabled_toolsets"]
        self.assertIn("browser", disabled)
        for toolset_name in (
            "clarify",
            "cronjob",
            "delegation",
            "memory",
        ):
            self.assertIn(toolset_name, disabled)
        # code_execution is deliberately NOT denied — children keep
        # execute_code for programmatic tool calling (Teknium, Jul 2026).
        self.assertNotIn("code_execution", disabled)

        definitions = model_tools.get_tool_definitions(
            enabled_toolsets=kwargs["enabled_toolsets"],
            disabled_toolsets=disabled,
            quiet_mode=True,
            skip_tool_search_assembly=True,
        )
        names = {item["function"]["name"] for item in definitions}
        self.assertTrue(names & {"terminal", "read_file", "web_search"})
        self.assertTrue(DELEGATE_BLOCKED_TOOLS.isdisjoint(names))

    def test_orchestrator_composite_regains_only_delegate_task(self):
        import model_tools

        parent = _make_mock_parent()
        parent.enabled_toolsets = ["hermes-cli"]
        parent.disabled_toolsets = ["delegation", "browser"]

        with (
            patch("run_agent.AIAgent") as MockAgent,
            patch("tools.delegate_tool._get_orchestrator_enabled", return_value=True),
            patch("tools.delegate_tool._get_max_spawn_depth", return_value=2),
        ):
            MockAgent.return_value = MagicMock()
            _build_child_agent(
                task_index=0,
                goal="Coordinate safely",
                context=None,
                toolsets=None,
                model=None,
                max_iterations=10,
                parent_agent=parent,
                task_count=1,
                role="orchestrator",
            )

        _, kwargs = MockAgent.call_args
        disabled = kwargs["disabled_toolsets"]
        self.assertNotIn("delegation", disabled)
        definitions = model_tools.get_tool_definitions(
            enabled_toolsets=kwargs["enabled_toolsets"],
            disabled_toolsets=disabled,
            quiet_mode=True,
            skip_tool_search_assembly=True,
        )
        names = {item["function"]["name"] for item in definitions}
        self.assertIn("delegate_task", names)
        self.assertTrue(
            (DELEGATE_BLOCKED_TOOLS - {"delegate_task"}).isdisjoint(names)
        )


class TestDelegateTask(unittest.TestCase):
    def test_no_parent_agent(self):
        result = json.loads(delegate_task(goal="test"))
        self.assertIn("error", result)
        self.assertIn("parent agent", result["error"])

    def test_depth_limit(self):
        parent = _make_mock_parent(depth=2)
        result = json.loads(delegate_task(goal="test", parent_agent=parent))
        self.assertIn("error", result)
        self.assertIn("depth limit", result["error"].lower())


    def test_child_inherits_runtime_credentials(self):
        parent = _make_mock_parent(depth=0)
        parent.base_url = "https://chatgpt.com/backend-api/codex"
        parent.api_key="***"
        parent.provider = "openai-codex"
        parent.api_mode = "codex_responses"

        with patch("run_agent.AIAgent") as MockAgent:
            mock_child = MagicMock()
            mock_child.run_conversation.return_value = {
                "final_response": "ok",
                "completed": True,
                "api_calls": 1,
            }
            MockAgent.return_value = mock_child

            delegate_task(goal="Test runtime inheritance", parent_agent=parent)

            _, kwargs = MockAgent.call_args
            self.assertEqual(kwargs["base_url"], parent.base_url)
            self.assertEqual(kwargs["api_key"], parent.api_key)
            self.assertEqual(kwargs["provider"], parent.provider)
            self.assertEqual(kwargs["api_mode"], parent.api_mode)

    def test_nous_child_rederives_api_mode_from_model(self):
        """Portal is dual-wire — same provider + different model prefix must
        not inherit the parent's Messages/chat_completions mode verbatim."""
        parent = _make_mock_parent(depth=0)
        parent.base_url = "https://inference-api.nousresearch.com/v1"
        parent.api_key = "portal-jwt"
        parent.provider = "nous"
        parent.api_mode = "anthropic_messages"
        parent.model = "anthropic/claude-opus-4.8"

        with patch("run_agent.AIAgent") as MockAgent:
            mock_child = MagicMock()
            MockAgent.return_value = mock_child

            _build_child_agent(
                task_index=0,
                goal="Stay on chat completions",
                context=None,
                toolsets=None,
                model="hermes-4-405b",
                max_iterations=10,
                parent_agent=parent,
                task_count=1,
            )

            _, kwargs = MockAgent.call_args
            self.assertEqual(kwargs["provider"], "nous")
            self.assertEqual(kwargs["model"], "hermes-4-405b")
            self.assertEqual(kwargs["api_mode"], "chat_completions")

        with patch("run_agent.AIAgent") as MockAgent:
            mock_child = MagicMock()
            MockAgent.return_value = mock_child
            parent.api_mode = "chat_completions"
            parent.model = "hermes-4-405b"

            _build_child_agent(
                task_index=0,
                goal="Move onto Messages",
                context=None,
                toolsets=None,
                model="anthropic/claude-opus-4.8",
                max_iterations=10,
                parent_agent=parent,
                task_count=1,
            )

            _, kwargs = MockAgent.call_args
            self.assertEqual(kwargs["api_mode"], "anthropic_messages")

class TestToolNamePreservation(unittest.TestCase):
    """Verify _last_resolved_tool_names is restored after subagent runs."""

    def test_global_tool_names_restored_after_delegation(self):
        """The process-global _last_resolved_tool_names must be restored
        after a subagent completes so the parent's execute_code sandbox
        generates correct imports."""
        import model_tools

        parent = _make_mock_parent(depth=0)
        original_tools = ["terminal", "read_file", "web_search", "execute_code", "delegate_task"]
        model_tools._last_resolved_tool_names = list(original_tools)

        with patch("run_agent.AIAgent") as MockAgent:
            mock_child = MagicMock()
            mock_child.run_conversation.return_value = {
                "final_response": "done", "completed": True, "api_calls": 1,
            }
            MockAgent.return_value = mock_child

            delegate_task(goal="Test tool preservation", parent_agent=parent)

        self.assertEqual(model_tools._last_resolved_tool_names, original_tools)


    def test_saved_tool_names_set_on_child_before_run(self):
        """_run_single_child must set _delegate_saved_tool_names on the child
        from model_tools._last_resolved_tool_names before run_conversation."""
        import model_tools

        parent = _make_mock_parent(depth=0)
        expected_tools = ["read_file", "web_search", "execute_code"]
        model_tools._last_resolved_tool_names = list(expected_tools)

        captured = {}

        with patch("run_agent.AIAgent") as MockAgent:
            mock_child = MagicMock()

            def capture_and_return(user_message, task_id=None, stream_callback=None):
                captured["saved"] = list(mock_child._delegate_saved_tool_names)
                return {"final_response": "ok", "completed": True, "api_calls": 1}

            mock_child.run_conversation.side_effect = capture_and_return
            MockAgent.return_value = mock_child

            delegate_task(goal="capture test", parent_agent=parent)

        self.assertEqual(captured["saved"], expected_tools)


class TestDelegateObservability(unittest.TestCase):
    """Tests for enriched metadata returned by _run_single_child."""

    def test_observability_fields_present(self):
        """Completed child should return tool_trace, tokens, model, exit_reason."""
        parent = _make_mock_parent(depth=0)

        with patch("run_agent.AIAgent") as MockAgent:
            mock_child = MagicMock()
            mock_child.model = "claude-sonnet-4-6"
            mock_child.session_prompt_tokens = 5000
            mock_child.session_completion_tokens = 1200
            mock_child.run_conversation.return_value = {
                "final_response": "done",
                "completed": True,
                "interrupted": False,
                "api_calls": 3,
                "messages": [
                    {"role": "user", "content": "do something"},
                    {"role": "assistant", "tool_calls": [
                        {"id": "tc_1", "function": {"name": "web_search", "arguments": '{"query": "test"}'}}
                    ]},
                    {"role": "tool", "tool_call_id": "tc_1", "content": '{"results": [1,2,3]}'},
                    {"role": "assistant", "content": "done"},
                ],
            }
            MockAgent.return_value = mock_child

            result = json.loads(delegate_task(goal="Test observability", parent_agent=parent))
            entry = result["results"][0]

            # Core observability fields
            self.assertEqual(entry["model"], "claude-sonnet-4-6")
            self.assertEqual(entry["exit_reason"], "completed")
            self.assertEqual(entry["tokens"]["input"], 5000)
            self.assertEqual(entry["tokens"]["output"], 1200)

            # Tool trace
            self.assertEqual(len(entry["tool_trace"]), 1)
            self.assertEqual(entry["tool_trace"][0]["tool"], "web_search")
            self.assertIn("args_bytes", entry["tool_trace"][0])
            self.assertIn("result_bytes", entry["tool_trace"][0])
            self.assertEqual(
                entry["tool_trace"][0]["input_summary"],
                {"argument_keys": ["query"], "targets": {}},
            )
            self.assertEqual(entry["tool_trace"][0]["status"], "ok")

    def test_tool_trace_handles_list_content_blocks(self):
        """Tool-result content blocks should not crash observability metadata."""
        parent = _make_mock_parent(depth=0)

        with patch("run_agent.AIAgent") as MockAgent:
            mock_child = MagicMock()
            mock_child.model = "claude-sonnet-4-6"
            mock_child.session_prompt_tokens = 0
            mock_child.session_completion_tokens = 0
            mock_child.run_conversation.return_value = {
                "final_response": "done",
                "completed": True,
                "interrupted": False,
                "api_calls": 1,
                "messages": [
                    {"role": "assistant", "tool_calls": [
                        {"id": "tc_1", "function": {"name": "image_generate", "arguments": '{"prompt": "x"}'}}
                    ]},
                    {"role": "tool", "tool_call_id": "tc_1", "content": [
                        {"type": "text", "text": '{"success": true}'},
                    ]},
                ],
            }
            MockAgent.return_value = mock_child

            result = json.loads(delegate_task(goal="Test list content", parent_agent=parent))
            trace = result["results"][0]["tool_trace"]
            self.assertEqual(trace[0]["tool"], "image_generate")
            self.assertEqual(trace[0]["status"], "ok")
            self.assertGreater(trace[0]["result_bytes"], 0)

    def test_parallel_tool_calls_paired_correctly(self):
        """Parallel tool calls should each get their own result via tool_call_id matching."""
        parent = _make_mock_parent(depth=0)

        with patch("run_agent.AIAgent") as MockAgent:
            mock_child = MagicMock()
            mock_child.model = "claude-sonnet-4-6"
            mock_child.session_prompt_tokens = 3000
            mock_child.session_completion_tokens = 800
            mock_child.run_conversation.return_value = {
                "final_response": "done",
                "completed": True,
                "interrupted": False,
                "api_calls": 1,
                "messages": [
                    {"role": "assistant", "tool_calls": [
                        {"id": "tc_a", "function": {"name": "web_search", "arguments": '{"q": "a"}'}},
                        {"id": "tc_b", "function": {"name": "web_search", "arguments": '{"q": "b"}'}},
                        {"id": "tc_c", "function": {"name": "terminal", "arguments": '{"cmd": "ls"}'}},
                    ]},
                    {"role": "tool", "tool_call_id": "tc_a", "content": '{"ok": true}'},
                    {"role": "tool", "tool_call_id": "tc_b", "content": "Error: rate limited"},
                    {"role": "tool", "tool_call_id": "tc_c", "content": "file1.txt\nfile2.txt"},
                    {"role": "assistant", "content": "done"},
                ],
            }
            MockAgent.return_value = mock_child

            result = json.loads(delegate_task(goal="Test parallel", parent_agent=parent))
            trace = result["results"][0]["tool_trace"]

            # All three tool calls should have results
            self.assertEqual(len(trace), 3)

            # First: web_search → ok
            self.assertEqual(trace[0]["tool"], "web_search")
            self.assertEqual(trace[0]["status"], "ok")
            self.assertIn("result_bytes", trace[0])

            # Second: web_search → error
            self.assertEqual(trace[1]["tool"], "web_search")
            self.assertEqual(trace[1]["status"], "error")
            self.assertIn("result_bytes", trace[1])

            # Third: terminal → ok
            self.assertEqual(trace[2]["tool"], "terminal")
            self.assertEqual(trace[2]["status"], "ok")
            self.assertIn("result_bytes", trace[2])

    def test_empty_sentinel_marks_status_failed(self):
        """Regression: a child that returns the literal '(empty)' sentinel
        (emitted by run_agent.py when the LLM returns empty responses after
        retries — e.g. transport misrouting) must be reported as failed, not
        silently accepted as a completed delegation. Otherwise the parent
        surfaces an empty string as if the subagent succeeded."""
        parent = _make_mock_parent(depth=0)

        with patch("run_agent.AIAgent") as MockAgent:
            mock_child = MagicMock()
            mock_child.model = "claude-sonnet-4-6"
            mock_child.session_prompt_tokens = 0
            mock_child.session_completion_tokens = 0
            mock_child.run_conversation.return_value = {
                "final_response": "(empty)",
                "completed": True,
                "interrupted": False,
                "api_calls": 4,
                "messages": [],
            }
            MockAgent.return_value = mock_child

            result = json.loads(delegate_task(goal="Test empty sentinel", parent_agent=parent))
            self.assertEqual(result["results"][0]["status"], "failed")


class TestSubagentCostRollup(unittest.TestCase):
    """Port of Kilo-Org/kilocode#9448 — parent's session_estimated_cost_usd
    must include subagent spend, not just the parent's own API calls."""

    def _make_parent_with_cost_counters(self, depth=0, starting_cost=0.0):
        parent = _make_mock_parent(depth=depth)
        # The fields AIAgent exposes and the footer reads from.  Set real
        # floats/strings so the rollup can add to them rather than tripping
        # on MagicMock auto-attrs.
        parent.session_estimated_cost_usd = starting_cost
        parent.session_cost_status = "unknown"
        parent.session_cost_source = "none"
        return parent

    def test_single_child_cost_folded_into_parent(self):
        parent = self._make_parent_with_cost_counters(starting_cost=0.10)

        with patch("run_agent.AIAgent") as MockAgent:
            mock_child = MagicMock()
            mock_child.model = "claude-sonnet-4-6"
            mock_child.session_prompt_tokens = 1000
            mock_child.session_completion_tokens = 200
            mock_child.session_estimated_cost_usd = 0.42
            mock_child.run_conversation.return_value = {
                "final_response": "done",
                "completed": True,
                "interrupted": False,
                "api_calls": 2,
                "messages": [],
            }
            MockAgent.return_value = mock_child

            result = json.loads(delegate_task(goal="do stuff", parent_agent=parent))

        # Parent footer must reflect parent_cost + child_cost.
        self.assertAlmostEqual(parent.session_estimated_cost_usd, 0.52, places=6)
        # Rollup must strip the internal field before serialising to the model.
        self.assertNotIn("_child_cost_usd", result["results"][0])
        self.assertNotIn("_child_role", result["results"][0])

    def test_batch_children_costs_sum_into_parent(self):
        parent = self._make_parent_with_cost_counters(starting_cost=0.00)

        with patch("tools.delegate_tool._run_single_child") as mock_run:
            mock_run.side_effect = [
                {
                    "task_index": 0,
                    "status": "completed",
                    "summary": "A",
                    "api_calls": 2,
                    "duration_seconds": 1.0,
                    "_child_role": "leaf",
                    "_child_cost_usd": 0.15,
                },
                {
                    "task_index": 1,
                    "status": "completed",
                    "summary": "B",
                    "api_calls": 2,
                    "duration_seconds": 1.0,
                    "_child_role": "leaf",
                    "_child_cost_usd": 0.27,
                },
                {
                    "task_index": 2,
                    "status": "failed",
                    "summary": "",
                    "error": "boom",
                    "api_calls": 0,
                    "duration_seconds": 0.1,
                    "_child_role": "leaf",
                    "_child_cost_usd": 0.03,
                },
            ]
            result = json.loads(
                delegate_task(
                    tasks=[{"goal": "A"}, {"goal": "B"}, {"goal": "C"}],
                    parent_agent=parent,
                )
            )

        # 0.15 + 0.27 + 0.03 even though one child failed — the API calls it
        # made before failing still cost money.
        self.assertAlmostEqual(parent.session_estimated_cost_usd, 0.45, places=6)
        # cost_source promoted from "none" since the parent had no direct spend.
        self.assertEqual(parent.session_cost_source, "subagent")
        self.assertEqual(parent.session_cost_status, "estimated")
        # All internal fields stripped from results.
        for entry in result["results"]:
            self.assertNotIn("_child_cost_usd", entry)
            self.assertNotIn("_child_role", entry)

class TestBlockedTools(unittest.TestCase):

    def test_execute_code_not_blocked(self):
        """Children retain execute_code (programmatic tool calling) so they
        can batch mechanical work instead of burning reasoning iterations
        (Teknium, Jul 2026)."""
        self.assertNotIn("execute_code", DELEGATE_BLOCKED_TOOLS)

class TestDelegationCredentialResolution(unittest.TestCase):
    """Tests for provider:model credential resolution in delegation config."""

    def test_no_provider_returns_none_credentials(self):
        """When delegation.provider is empty, all credentials are None (inherit parent)."""
        parent = _make_mock_parent(depth=0)
        cfg = {"model": "", "provider": ""}
        creds = _resolve_delegation_credentials(cfg, parent)
        self.assertIsNone(creds["provider"])
        self.assertIsNone(creds["base_url"])
        self.assertIsNone(creds["api_key"])
        self.assertIsNone(creds["api_mode"])
        self.assertIsNone(creds["model"])

    def test_direct_endpoint_uses_configured_base_url_and_api_key(self):
        parent = _make_mock_parent(depth=0)
        cfg = {
            "model": "qwen2.5-coder",
            "provider": "openrouter",
            "base_url": "http://localhost:1234/v1",
            "api_key": "local-key",
        }
        creds = _resolve_delegation_credentials(cfg, parent)
        self.assertEqual(creds["model"], "qwen2.5-coder")
        self.assertEqual(creds["provider"], "custom")
        self.assertEqual(creds["base_url"], "http://localhost:1234/v1")
        self.assertEqual(creds["api_key"], "local-key")
        self.assertEqual(creds["api_mode"], "chat_completions")

    def test_direct_endpoint_auto_detects_anthropic_messages_suffix(self):
        # Issue #10213: Azure AI Foundry exposes Anthropic-compatible models at
        # a /anthropic URL suffix. Subagents must pick anthropic_messages
        # automatically, matching the main agent's runtime resolver.
        parent = _make_mock_parent(depth=0)
        cfg = {
            "model": "claude-opus-4-6",
            "provider": "custom",
            "base_url": "https://myfoundry.services.ai.azure.com/anthropic",
            "api_key": "foundry-key",
        }
        creds = _resolve_delegation_credentials(cfg, parent)
        self.assertEqual(creds["provider"], "custom")
        self.assertEqual(creds["base_url"], "https://myfoundry.services.ai.azure.com/anthropic")
        self.assertEqual(creds["api_key"], "foundry-key")
        self.assertEqual(creds["api_mode"], "anthropic_messages")


    @patch("hermes_cli.runtime_provider.resolve_runtime_provider")
    def test_provider_resolution_failure_raises_valueerror(self, mock_resolve):
        """When provider resolution fails, ValueError is raised with helpful message."""
        mock_resolve.side_effect = RuntimeError("OPENROUTER_API_KEY not set")
        parent = _make_mock_parent(depth=0)
        cfg = {"model": "some-model", "provider": "openrouter"}
        with self.assertRaises(ValueError) as ctx:
            _resolve_delegation_credentials(cfg, parent)
        self.assertIn("openrouter", str(ctx.exception).lower())
        self.assertIn("Cannot resolve", str(ctx.exception))

    @patch("hermes_cli.runtime_provider.resolve_runtime_provider")
    def test_provider_resolves_but_no_api_key_raises(self, mock_resolve):
        """When provider resolves but has no API key, ValueError is raised."""
        mock_resolve.return_value = {
            "provider": "openrouter",
            "base_url": "https://openrouter.ai/api/v1",
            "api_key": "",
            "api_mode": "chat_completions",
        }
        parent = _make_mock_parent(depth=0)
        cfg = {"model": "some-model", "provider": "openrouter"}
        with self.assertRaises(ValueError) as ctx:
            _resolve_delegation_credentials(cfg, parent)
        self.assertIn("no API key", str(ctx.exception))

    @patch("hermes_cli.runtime_provider.resolve_runtime_provider")
    def test_named_custom_provider_preserves_provider_name(self, mock_resolve):
        """Named custom provider (e.g. crof.ai) resolves to 'custom' at runtime level
        but the subagent must retain the original provider identity so that
        resolve_provider_client routes to the correct endpoint on retry/fallback.
        Regression test for #26954.
        """
        mock_resolve.return_value = {
            "provider": "custom",  # runtime marks it as "custom" type
            "model": "deepseek-v4-pro-CEER",
            "base_url": "https://api.crof.ai/v1",
            "api_key": "crof-key-abc",
            "api_mode": "chat_completions",
        }
        parent = _make_mock_parent(depth=0)
        cfg = {"model": "deepseek-v4-pro-CEER", "provider": "crof.ai"}
        creds = _resolve_delegation_credentials(cfg, parent)
        # The key assertion: subagent must keep "crof.ai", NOT "custom"
        self.assertEqual(creds["provider"], "crof.ai")
        self.assertEqual(creds["model"], "deepseek-v4-pro-CEER")
        self.assertEqual(creds["base_url"], "https://api.crof.ai/v1")
        self.assertEqual(creds["api_key"], "crof-key-abc")
        # Verify resolve_runtime_provider was called with the configured name
        mock_resolve.assert_called_once_with(
            requested="crof.ai", target_model="deepseek-v4-pro-CEER"
        )

class TestDelegationProviderIntegration(unittest.TestCase):
    """Integration tests: delegation config → _run_single_child → AIAgent construction."""

    @patch("tools.delegate_tool._load_config")
    @patch("tools.delegate_tool._resolve_delegation_credentials")
    def test_config_provider_credentials_reach_child_agent(self, mock_creds, mock_cfg):
        """When delegation.provider is configured, child agent gets resolved credentials."""
        mock_cfg.return_value = {
            "max_iterations": 45,
            "model": "google/gemini-3-flash-preview",
            "provider": "openrouter",
        }
        mock_creds.return_value = {
            "model": "google/gemini-3-flash-preview",
            "provider": "openrouter",
            "base_url": "https://openrouter.ai/api/v1",
            "api_key": "sk-or-delegation-key",
            "api_mode": "chat_completions",
        }
        parent = _make_mock_parent(depth=0)

        with patch("run_agent.AIAgent") as MockAgent:
            mock_child = MagicMock()
            mock_child.run_conversation.return_value = {
                "final_response": "done", "completed": True, "api_calls": 1
            }
            MockAgent.return_value = mock_child

            delegate_task(goal="Test provider routing", parent_agent=parent)

            _, kwargs = MockAgent.call_args
            self.assertEqual(kwargs["model"], "google/gemini-3-flash-preview")
            self.assertEqual(kwargs["provider"], "openrouter")
            self.assertEqual(kwargs["base_url"], "https://openrouter.ai/api/v1")
            self.assertEqual(kwargs["api_key"], "sk-or-delegation-key")
            self.assertEqual(kwargs["api_mode"], "chat_completions")

    @patch("tools.delegate_tool._load_config")
    @patch("tools.delegate_tool._resolve_delegation_credentials")
    def test_cross_provider_delegation(self, mock_creds, mock_cfg):
        """Parent on Nous, subagent on OpenRouter — full credential switch."""
        mock_cfg.return_value = {
            "max_iterations": 45,
            "model": "google/gemini-3-flash-preview",
            "provider": "openrouter",
        }
        mock_creds.return_value = {
            "model": "google/gemini-3-flash-preview",
            "provider": "openrouter",
            "base_url": "https://openrouter.ai/api/v1",
            "api_key": "sk-or-key",
            "api_mode": "chat_completions",
        }
        parent = _make_mock_parent(depth=0)
        parent.provider = "nous"
        parent.base_url = "https://inference-api.nousresearch.com/v1"
        parent.api_key = "nous-key-abc"

        with patch("run_agent.AIAgent") as MockAgent:
            mock_child = MagicMock()
            mock_child.run_conversation.return_value = {
                "final_response": "done", "completed": True, "api_calls": 1
            }
            MockAgent.return_value = mock_child

            delegate_task(goal="Cross-provider test", parent_agent=parent)

            _, kwargs = MockAgent.call_args
            # Child should use OpenRouter, NOT Nous
            self.assertEqual(kwargs["provider"], "openrouter")
            self.assertEqual(kwargs["base_url"], "https://openrouter.ai/api/v1")
            self.assertEqual(kwargs["api_key"], "sk-or-key")
            self.assertNotEqual(kwargs["base_url"], parent.base_url)
            self.assertNotEqual(kwargs["api_key"], parent.api_key)

    @patch("tools.delegate_tool._load_config")
    @patch("tools.delegate_tool._resolve_delegation_credentials")
    def test_direct_endpoint_credentials_reach_child_agent(self, mock_creds, mock_cfg):
        mock_cfg.return_value = {
            "max_iterations": 45,
            "model": "qwen2.5-coder",
            "base_url": "http://localhost:1234/v1",
            "api_key": "local-key",
        }
        mock_creds.return_value = {
            "model": "qwen2.5-coder",
            "provider": "custom",
            "base_url": "http://localhost:1234/v1",
            "api_key": "local-key",
            "api_mode": "chat_completions",
        }
        parent = _make_mock_parent(depth=0)

        with patch("run_agent.AIAgent") as MockAgent:
            mock_child = MagicMock()
            mock_child.run_conversation.return_value = {
                "final_response": "done", "completed": True, "api_calls": 1
            }
            MockAgent.return_value = mock_child

            delegate_task(goal="Direct endpoint test", parent_agent=parent)

            _, kwargs = MockAgent.call_args
            self.assertEqual(kwargs["model"], "qwen2.5-coder")
            self.assertEqual(kwargs["provider"], "custom")
            self.assertEqual(kwargs["base_url"], "http://localhost:1234/v1")
            self.assertEqual(kwargs["api_key"], "local-key")
            self.assertEqual(kwargs["api_mode"], "chat_completions")

    @patch("tools.delegate_tool._load_config")
    @patch("tools.delegate_tool._resolve_delegation_credentials")
    def test_credential_error_returns_json_error(self, mock_creds, mock_cfg):
        """When credential resolution fails, delegate_task returns a JSON error."""
        mock_cfg.return_value = {"model": "bad-model", "provider": "nonexistent"}
        mock_creds.side_effect = ValueError(
            "Cannot resolve delegation provider 'nonexistent': Unknown provider"
        )
        parent = _make_mock_parent(depth=0)

        result = json.loads(delegate_task(goal="Should fail", parent_agent=parent))
        self.assertIn("error", result)
        self.assertIn("Cannot resolve", result["error"])
        self.assertIn("nonexistent", result["error"])

class TestChildCredentialPoolResolution(unittest.TestCase):
    def test_same_provider_shares_parent_pool(self):
        parent = _make_mock_parent()
        mock_pool = MagicMock()
        parent._credential_pool = mock_pool

        result = _resolve_child_credential_pool("openrouter", parent)
        self.assertIs(result, mock_pool)

    # --- Custom-endpoint identity resolution (issue #7833) ---


    @patch(
        "tools.delegate_tool._load_config",
        return_value={"inherit_mcp_toolsets": False},
    )
    def test_build_child_agent_strict_intersection_when_opted_out(self, mock_cfg):
        parent = _make_mock_parent()
        parent.enabled_toolsets = ["web", "browser", "mcp-MiniMax"]

        with patch("run_agent.AIAgent") as MockAgent:
            mock_child = MagicMock()
            MockAgent.return_value = mock_child

            _build_child_agent(
                task_index=0,
                goal="Test narrowed toolsets",
                context=None,
                toolsets=["web", "browser"],
                model=None,
                max_iterations=10,
                parent_agent=parent,
                task_count=1,
            )

        self.assertEqual(
            MockAgent.call_args[1]["enabled_toolsets"],
            ["web", "browser"],
        )


class TestChildCredentialLeasing(unittest.TestCase):
    def test_run_single_child_acquires_and_releases_lease(self):
        from tools.delegate_tool import _run_single_child

        leased_entry = MagicMock()
        leased_entry.id = "cred-b"

        child = MagicMock()
        child._credential_pool = MagicMock()
        child._credential_pool.acquire_lease.return_value = "cred-b"
        child._credential_pool.current.return_value = leased_entry
        child.run_conversation.return_value = {
            "final_response": "done",
            "completed": True,
            "interrupted": False,
            "api_calls": 1,
            "messages": [],
        }

        result = _run_single_child(
            task_index=0,
            goal="Investigate rate limits",
            child=child,
            parent_agent=_make_mock_parent(),
        )

        self.assertEqual(result["status"], "completed")
        child._credential_pool.acquire_lease.assert_called_once_with()
        child._swap_credential.assert_called_once_with(leased_entry)
        child._credential_pool.release_lease.assert_called_once_with("cred-b")

    def test_run_single_child_releases_lease_after_failure(self):
        from tools.delegate_tool import _run_single_child

        child = MagicMock()
        child._credential_pool = MagicMock()
        child._credential_pool.acquire_lease.return_value = "cred-a"
        child._credential_pool.current.return_value = MagicMock(id="cred-a")
        child.run_conversation.side_effect = RuntimeError("boom")

        result = _run_single_child(
            task_index=1,
            goal="Trigger failure",
            child=child,
            parent_agent=_make_mock_parent(),
        )

        self.assertEqual(result["status"], "error")
        child._credential_pool.release_lease.assert_called_once_with("cred-a")


class TestDelegateHeartbeat(unittest.TestCase):
    """Heartbeat propagates child activity to parent during delegation.

    Without the heartbeat, the gateway inactivity timeout fires because the
    parent's _last_activity_ts freezes when delegate_task starts.
    """

    def test_heartbeat_touches_parent_activity_during_child_run(self):
        """Parent's _touch_activity is called while child.run_conversation blocks."""
        from tools.delegate_tool import _run_single_child

        parent = _make_mock_parent()
        touch_calls = []
        first_touch = threading.Event()

        def record(desc):
            touch_calls.append(desc)
            first_touch.set()

        parent._touch_activity = record

        child = MagicMock()
        child.get_activity_summary.return_value = {
            "current_tool": "terminal",
            "api_call_count": 3,
            "max_iterations": 50,
            "last_activity_desc": "executing tool: terminal",
        }

        # Block the child only until the first heartbeat lands (bounded), so
        # the test is event-driven rather than sleep-timed.
        def slow_run(**kwargs):
            first_touch.wait(5)
            return {"final_response": "done", "completed": True, "api_calls": 3}

        child.run_conversation.side_effect = slow_run

        # Patch the heartbeat interval to fire quickly
        with patch("tools.delegate_tool._HEARTBEAT_INTERVAL", 0.01):
            _run_single_child(
                task_index=0,
                goal="Test heartbeat",
                child=child,
                parent_agent=parent,
            )

        self.assertGreater(len(touch_calls), 0,
                           "Heartbeat did not propagate activity to parent")
        # Verify the description includes child's current tool detail
        self.assertTrue(
            any("terminal" in desc for desc in touch_calls),
            f"Heartbeat descriptions should include child tool info: {touch_calls}")

    def test_heartbeat_stops_after_child_completes(self):
        """Heartbeat thread is cleaned up when the child finishes."""
        from tools.delegate_tool import _run_single_child

        parent = _make_mock_parent()
        touch_calls = []
        parent._touch_activity = lambda desc: touch_calls.append(desc)

        child = MagicMock()
        child.get_activity_summary.return_value = {
            "current_tool": None,
            "api_call_count": 1,
            "max_iterations": 50,
            "last_activity_desc": "done",
        }
        child.run_conversation.return_value = {
            "final_response": "done", "completed": True, "api_calls": 1,
        }

        with patch("tools.delegate_tool._HEARTBEAT_INTERVAL", 0.01):
            _run_single_child(
                task_index=0,
                goal="Test cleanup",
                child=child,
                parent_agent=parent,
            )

        # Record count after completion, wait several heartbeat intervals, and
        # verify no more calls landed.
        count_after = len(touch_calls)
        time.sleep(0.05)
        self.assertEqual(len(touch_calls), count_after,
                         "Heartbeat continued firing after child completed")

    def test_heartbeat_does_not_trip_idle_stale_while_inside_tool(self):
        """A long-running tool (no iteration advance, but current_tool set)
        must not be flagged stale at the idle threshold.

        Bug #13041: when a child is legitimately busy inside a slow tool
        (terminal command, browser fetch), api_call_count does not advance.
        The previous stale check treated this as idle and stopped the
        heartbeat after 5 cycles (~150s), letting the gateway kill the
        session. The fix uses a much higher in-tool threshold and only
        applies the tight idle threshold when current_tool is None.
        """
        from tools.delegate_tool import _run_single_child

        parent = _make_mock_parent()
        touch_calls = []
        kept_going = threading.Event()

        def record(desc):
            touch_calls.append(desc)
            if len(touch_calls) > 2:
                kept_going.set()

        parent._touch_activity = record

        child = MagicMock()
        # Child is stuck inside a single terminal call for the whole run.
        # api_call_count never advances, current_tool is always set.
        child.get_activity_summary.return_value = {
            "current_tool": "terminal",
            "api_call_count": 1,
            "max_iterations": 50,
            "last_activity_desc": "executing tool: terminal",
        }

        def slow_run(**kwargs):
            # Return as soon as the heartbeat has proven it kept firing past
            # the idle threshold. If the idle rules wrongly applied, the event
            # never sets and the bounded wait expires, failing the assertion
            # below instead of hanging.
            kept_going.wait(5)
            return {"final_response": "done", "completed": True, "api_calls": 1}

        child.run_conversation.side_effect = slow_run

        # Use tiny thresholds so the assertion is scheduler-robust in CI:
        # if idle rules were used for in-tool work, heartbeat would stop after
        # ~2 cycles. The in-tool branch should keep touching well past that.
        with (
            patch("tools.delegate_tool._HEARTBEAT_INTERVAL", 0.01),
            patch("tools.delegate_tool._HEARTBEAT_STALE_CYCLES_IDLE", 2),
            patch("tools.delegate_tool._HEARTBEAT_STALE_CYCLES_IN_TOOL", 40),
        ):
            _run_single_child(
                task_index=0,
                goal="Test long-running tool",
                child=child,
                parent_agent=parent,
            )

        # If idle-threshold logic applied, we'd cap around 2 touches; prove we
        # continued beyond that while inside a long-running tool.
        self.assertGreater(
            len(touch_calls), 2,
            f"Heartbeat stopped too early while child was inside a tool; "
            f"got {len(touch_calls)} touches",
        )


class TestDelegationReasoningEffort(unittest.TestCase):
    """Tests for delegation.reasoning_effort config override."""

    @patch("tools.delegate_tool._load_config")
    @patch("run_agent.AIAgent")
    def test_inherits_parent_reasoning_when_no_override(self, MockAgent, mock_cfg):
        """With no delegation.reasoning_effort, child inherits parent's config."""
        mock_cfg.return_value = {"max_iterations": 50, "reasoning_effort": ""}
        MockAgent.return_value = MagicMock()
        parent = _make_mock_parent()
        parent.reasoning_config = {"enabled": True, "effort": "xhigh"}

        _build_child_agent(
            task_index=0, goal="test", context=None, toolsets=None,
            model=None, max_iterations=50, parent_agent=parent,
            task_count=1,
        )
        call_kwargs = MockAgent.call_args[1]
        self.assertEqual(call_kwargs["reasoning_config"], {"enabled": True, "effort": "xhigh"})

    @patch("tools.delegate_tool._load_config")
    @patch("run_agent.AIAgent")
    def test_override_reasoning_effort_from_config(self, MockAgent, mock_cfg):
        """delegation.reasoning_effort overrides the parent's level."""
        mock_cfg.return_value = {"max_iterations": 50, "reasoning_effort": "low"}
        MockAgent.return_value = MagicMock()
        parent = _make_mock_parent()
        parent.reasoning_config = {"enabled": True, "effort": "xhigh"}

        _build_child_agent(
            task_index=0, goal="test", context=None, toolsets=None,
            model=None, max_iterations=50, parent_agent=parent,
            task_count=1,
        )
        call_kwargs = MockAgent.call_args[1]
        self.assertEqual(call_kwargs["reasoning_config"], {"enabled": True, "effort": "low"})

# =========================================================================
# Dispatch helper, progress events, concurrency
# =========================================================================

class TestDispatchDelegateTask(unittest.TestCase):
    """Tests for the _dispatch_delegate_task helper and full param forwarding."""

    def test_model_acp_args_not_forwarded(self):
        """The live model dispatch path strips hidden ACP transport args."""
        import run_agent

        captured = {}

        def fake_delegate_task(**kwargs):
            captured.update(kwargs)
            return "{}"

        parent = _make_mock_parent(depth=0)
        with patch("tools.delegate_tool.delegate_task", fake_delegate_task):
            run_agent.AIAgent._dispatch_delegate_task(
                parent,
                {
                    "goal": "test",
                    "acp_command": "claude",
                    "acp_args": ["--acp", "--stdio"],
                    "tasks": [
                        {
                            "goal": "nested",
                            "acp_command": "codex",
                            "acp_args": ["--acp"],
                        },
                    ],
                },
            )

        self.assertNotIn("acp_command", captured)
        self.assertNotIn("acp_args", captured)
        self.assertEqual(captured["goal"], "test")
        self.assertNotIn("acp_command", captured["tasks"][0])
        self.assertNotIn("acp_args", captured["tasks"][0])

class TestDelegateEventEnum(unittest.TestCase):
    """Tests for DelegateEvent enum and back-compat aliases."""

    def test_progress_callback_normalises_tool_started(self):
        """_build_child_progress_callback handles tool.started via enum."""
        parent = _make_mock_parent()
        parent._delegate_spinner = MagicMock()
        parent.tool_progress_callback = MagicMock()

        cb = _build_child_progress_callback(0, "test goal", parent, task_count=1)
        self.assertIsNotNone(cb)

        cb("tool.started", tool_name="terminal", preview="ls")
        parent._delegate_spinner.print_above.assert_called()


    def test_progress_callback_ignores_unknown_events(self):
        """Unknown event types are silently ignored."""
        parent = _make_mock_parent()
        parent._delegate_spinner = MagicMock()

        cb = _build_child_progress_callback(0, "test goal", parent, task_count=1)
        # Should not raise
        cb("some.unknown.event", tool_name="x")
        parent._delegate_spinner.print_above.assert_not_called()

    def test_progress_callback_task_progress_not_misrendered(self):
        """'subagent_progress' (legacy name for TASK_PROGRESS) carries a
        pre-batched summary in the tool_name slot.  Before the fix, this
        fell through to the TASK_TOOL_STARTED rendering path, treating
        the summary string as a tool name.  After the fix: distinct
        render (no tool-start emoji lookup) and pass-through relay
        upward (no re-batching).

        Regression path only reachable once nested orchestration is
        enabled: nested orchestrators relay subagent_progress from
        grandchildren upward through this callback.
        """
        parent = _make_mock_parent()
        parent._delegate_spinner = MagicMock()
        parent.tool_progress_callback = MagicMock()

        cb = _build_child_progress_callback(0, "test goal", parent, task_count=1)
        cb("subagent_progress", tool_name="🔀 [1] terminal, file")

        # Spinner gets a distinct 🔀-prefixed line, NOT a tool emoji
        # followed by the summary string as if it were a tool name.
        calls = parent._delegate_spinner.print_above.call_args_list
        self.assertTrue(any("🔀 🔀 [1] terminal, file" in str(c) for c in calls))
        # Parent callback receives the relay (pass-through, no re-batching).
        parent.tool_progress_callback.assert_called_once()
        # No '⚡' tool-start emoji should appear — that's the pre-fix bug.
        self.assertFalse(any("⚡" in str(c) for c in calls))


class TestConcurrencyDefaults(unittest.TestCase):
    """Tests for the concurrency default and no hard ceiling."""

    def test_load_config_prefers_active_persistent_config_over_cli_defaults(self):
        stale_cli = types.ModuleType("cli")
        stale_cli.CLI_CONFIG = {
            "delegation": {
                "max_iterations": 45,
                "model": "",
                "provider": "",
                "base_url": "",
                "api_key": "",
            }
        }
        active_config = {
            "delegation": {
                "max_iterations": 50,
                "max_concurrent_children": 50,
                "max_spawn_depth": 10,
            }
        }

        with patch.dict("sys.modules", {"cli": stale_cli}):
            with patch(
                "hermes_cli.config.load_config_readonly", return_value=active_config
            ):
                self.assertEqual(_load_config()["max_concurrent_children"], 50)
                self.assertEqual(_get_max_concurrent_children(), 50)


    @patch("tools.delegate_tool._load_config",
           return_value={"max_concurrent_children": 0})
    def test_zero_clamped_to_one(self, mock_cfg):
        """Floor of 1 is enforced; zero or negative values raise to 1."""
        self.assertEqual(_get_max_concurrent_children(), 1)

class TestAsyncCapUnified(unittest.TestCase):
    """max_async_children is deprecated: the async cap IS max_concurrent_children."""

    @patch("tools.delegate_tool._load_config",
           return_value={"max_concurrent_children": 15})
    def test_async_cap_follows_concurrent_children(self, mock_cfg):
        from tools.delegate_tool import _get_max_async_children
        self.assertEqual(_get_max_async_children(), 15)

    @patch("tools.delegate_tool._load_config",
           return_value={"max_concurrent_children": 15, "max_async_children": 3})
    def test_stale_max_async_children_ignored(self, mock_cfg):
        """A leftover max_async_children in config must not shrink the cap."""
        from tools.delegate_tool import _get_max_async_children
        self.assertEqual(_get_max_async_children(), 15)

# =========================================================================
# max_spawn_depth clamping
# =========================================================================

class TestMaxSpawnDepth(unittest.TestCase):
    """Tests for _get_max_spawn_depth clamping and fallback behavior."""

    @patch("tools.delegate_tool._load_config", return_value={})
    def test_max_spawn_depth_defaults_to_1(self, mock_cfg):
        from tools.delegate_tool import _get_max_spawn_depth
        self.assertEqual(_get_max_spawn_depth(), 1)

    @patch("tools.delegate_tool._load_config",
           return_value={"max_spawn_depth": 0})
    def test_max_spawn_depth_clamped_below_one(self, mock_cfg):
        import logging
        from tools.delegate_tool import _get_max_spawn_depth
        with self.assertLogs("tools.delegate_tool", level=logging.WARNING) as cm:
            result = _get_max_spawn_depth()
        self.assertEqual(result, 1)
        self.assertTrue(any("below floor 1" in m for m in cm.output))

# =========================================================================
# role param plumbing
# =========================================================================
#
# These tests cover the schema + signature + stash plumbing of the role
# param.  The full role-honoring behavior (toolset re-add, role-aware
# prompt) lives in TestOrchestratorRoleBehavior below; these tests only
# assert on _delegate_role stashing and on the schema shape.


class TestOrchestratorRoleSchema(unittest.TestCase):
    """Tests that the role param reaches the child via dispatch."""

    @patch("tools.delegate_tool._resolve_delegation_credentials")
    @patch("tools.delegate_tool._load_config",
           return_value={"max_spawn_depth": 2})
    def _run_with_mock_child(self, role_arg, mock_cfg, mock_creds):
        mock_creds.return_value = {
            "provider": None, "base_url": None,
            "api_key": None, "api_mode": None, "model": None,
        }
        parent = _make_mock_parent(depth=0)
        with patch("run_agent.AIAgent") as MockAgent:
            mock_child = MagicMock()
            mock_child.run_conversation.return_value = {
                "final_response": "done", "completed": True,
                "api_calls": 1, "messages": [],
            }
            mock_child._delegate_saved_tool_names = []
            mock_child._credential_pool = None
            mock_child.session_prompt_tokens = 0
            mock_child.session_completion_tokens = 0
            mock_child.model = "test"
            MockAgent.return_value = mock_child
            kwargs = {"goal": "test", "parent_agent": parent}
            if role_arg is not _SENTINEL:
                kwargs["role"] = role_arg
            delegate_task(**kwargs)
            return mock_child

    def test_default_role_is_leaf(self):
        child = self._run_with_mock_child(_SENTINEL)
        self.assertEqual(child._delegate_role, "leaf")


    def test_schema_omits_acp_transport_fields(self):
        from tools.delegate_tool import DELEGATE_TASK_SCHEMA
        props = DELEGATE_TASK_SCHEMA["parameters"]["properties"]

        task_props = props["tasks"]["items"]["properties"]
        self.assertNotIn("acp_command", props)
        self.assertNotIn("acp_args", props)
        self.assertNotIn("acp_command", task_props)
        self.assertNotIn("acp_args", task_props)


# Sentinel used to distinguish "role kwarg omitted" from "role=None".
_SENTINEL = object()


# =========================================================================
# role-honoring behavior
# =========================================================================


def _make_role_mock_child():
    """Helper: mock child with minimal fields for delegate_task to process."""
    mock_child = MagicMock()
    mock_child.run_conversation.return_value = {
        "final_response": "done", "completed": True,
        "api_calls": 1, "messages": [],
    }
    mock_child._delegate_saved_tool_names = []
    mock_child._credential_pool = None
    mock_child.session_prompt_tokens = 0
    mock_child.session_completion_tokens = 0
    mock_child.model = "test"
    return mock_child


class TestOrchestratorRoleBehavior(unittest.TestCase):
    """Tests that role='orchestrator' actually changes toolset + prompt."""

    @patch("tools.delegate_tool._resolve_delegation_credentials")
    @patch("tools.delegate_tool._load_config",
           return_value={"max_spawn_depth": 2})
    def test_orchestrator_role_keeps_delegation_at_depth_1(
        self, mock_cfg, mock_creds
    ):
        """role='orchestrator' + depth-0 parent with max_spawn_depth=2 →
        child at depth 1 gets 'delegation' in enabled_toolsets (can
        further delegate).  Requires max_spawn_depth>=2 since the new
        default is 1 (flat)."""
        mock_creds.return_value = {
            "provider": None, "base_url": None,
            "api_key": None, "api_mode": None, "model": None,
        }
        parent = _make_mock_parent(depth=0)
        parent.enabled_toolsets = ["terminal", "file"]
        with patch("run_agent.AIAgent") as MockAgent:
            mock_child = _make_role_mock_child()
            MockAgent.return_value = mock_child
            delegate_task(goal="test", role="orchestrator", parent_agent=parent)
            kwargs = MockAgent.call_args[1]
            self.assertIn("delegation", kwargs["enabled_toolsets"])
            self.assertEqual(mock_child._delegate_role, "orchestrator")

    @patch("tools.delegate_tool._resolve_delegation_credentials")
    @patch("tools.delegate_tool._load_config",
           return_value={"max_spawn_depth": 2})
    def test_orchestrator_blocked_at_max_spawn_depth(
        self, mock_cfg, mock_creds
    ):
        """Parent at depth 1 with max_spawn_depth=2 spawns child
        at depth 2 (the floor); role='orchestrator' degrades to leaf."""
        mock_creds.return_value = {
            "provider": None, "base_url": None,
            "api_key": None, "api_mode": None, "model": None,
        }
        parent = _make_mock_parent(depth=1)
        parent.enabled_toolsets = ["terminal", "delegation"]
        with patch("run_agent.AIAgent") as MockAgent:
            mock_child = _make_role_mock_child()
            MockAgent.return_value = mock_child
            delegate_task(goal="test", role="orchestrator", parent_agent=parent)
            kwargs = MockAgent.call_args[1]
            self.assertNotIn("delegation", kwargs["enabled_toolsets"])
            self.assertEqual(mock_child._delegate_role, "leaf")


    # ── Role-aware system prompt ────────────────────────────────────────

    def test_orchestrator_prompt_mentions_delegation_capability(self):
        prompt = _build_child_system_prompt(
            "Survey approaches", role="orchestrator",
            max_spawn_depth=2, child_depth=1,
        )
        self.assertIn("delegate_task", prompt)
        self.assertIn("Orchestrator Role", prompt)
        # Depth/max-depth note present and literal:
        self.assertIn("depth 1", prompt)
        self.assertIn("max_spawn_depth=2", prompt)


class TestOrchestratorEndToEnd(unittest.TestCase):
    """End-to-end: parent -> orchestrator -> two-leaf nested orchestration.

    Covers the acceptance gate: parent delegates to an orchestrator
    child; the orchestrator delegates to two leaf grandchildren; the
    role/toolset/depth chain all resolve correctly.

    Mock strategy: a single AIAgent patch with a side_effect factory
    that keys on the child's ephemeral_system_prompt — orchestrator
    prompts contain the string "Orchestrator Role" (see
    _build_child_system_prompt), leaves don't.  The orchestrator
    mock's run_conversation recursively calls delegate_task with
    tasks=[{goal:...},{goal:...}] to spawn two leaves.  This keeps
    the test in one patch context and avoids depth-indexed nesting.
    """

    @patch("tools.delegate_tool._resolve_delegation_credentials")
    @patch("tools.delegate_tool._load_config",
           return_value={"max_spawn_depth": 2})
    def test_end_to_end_nested_orchestration(self, mock_cfg, mock_creds):
        mock_creds.return_value = {
            "provider": None, "base_url": None,
            "api_key": None, "api_mode": None, "model": None,
        }
        parent = _make_mock_parent(depth=0)
        parent.enabled_toolsets = ["terminal", "file", "delegation"]

        # (enabled_toolsets, _delegate_role) for each agent built
        built_agents: list = []
        # Keep the orchestrator mock around so the re-entrant delegate_task
        # can reach it via closure.
        orch_mock = {}

        def _factory(*a, **kw):
            prompt = kw.get("ephemeral_system_prompt", "") or ""
            is_orchestrator = "Orchestrator Role" in prompt
            m = _make_role_mock_child()
            built_agents.append({
                "enabled_toolsets": list(kw.get("enabled_toolsets") or []),
                "is_orchestrator_prompt": is_orchestrator,
            })

            if is_orchestrator:
                # Prepare the orchestrator mock as a parent-capable object
                # so the nested delegate_task call succeeds.
                m._delegate_depth = 1
                m._delegate_role = "orchestrator"
                m._active_children = []
                m._active_children_lock = threading.Lock()
                m._session_db = None
                m.platform = "cli"
                m.enabled_toolsets = ["terminal", "file", "delegation"]
                m.api_key = "***"
                m.base_url = ""
                m.provider = None
                m.api_mode = None
                m.providers_allowed = None
                m.providers_ignored = None
                m.providers_order = None
                m.provider_sort = None
                m._print_fn = None
                m.tool_progress_callback = None
                m.thinking_callback = None
                orch_mock["agent"] = m

                def _orchestrator_run(user_message=None, task_id=None, stream_callback=None):
                    # Re-entrant: orchestrator spawns two leaves
                    delegate_task(
                        tasks=[{"goal": "leaf-A"}, {"goal": "leaf-B"}],
                        parent_agent=m,
                    )
                    return {
                        "final_response": "orchestrated 2 workers",
                        "completed": True, "api_calls": 1,
                        "messages": [],
                    }
                m.run_conversation.side_effect = _orchestrator_run

            return m

        with patch("run_agent.AIAgent", side_effect=_factory) as MockAgent:
            delegate_task(
                goal="top-level orchestration",
                role="orchestrator",
                parent_agent=parent,
            )

        # 1 orchestrator + 2 leaf grandchildren = 3 agents
        self.assertEqual(MockAgent.call_count, 3)
        # First built = the orchestrator (parent's direct child)
        self.assertIn("delegation", built_agents[0]["enabled_toolsets"])
        self.assertTrue(built_agents[0]["is_orchestrator_prompt"])
        # Next two = leaves (grandchildren)
        self.assertNotIn("delegation", built_agents[1]["enabled_toolsets"])
        self.assertFalse(built_agents[1]["is_orchestrator_prompt"])
        self.assertNotIn("delegation", built_agents[2]["enabled_toolsets"])
        self.assertFalse(built_agents[2]["is_orchestrator_prompt"])


class TestSubagentApprovalCallback(unittest.TestCase):
    """Subagent worker threads must have a non-interactive approval callback
    installed so dangerous-command prompts don't fall back to input() and
    deadlock the parent's prompt_toolkit TUI.

    Governed by delegation.subagent_auto_approve:
      false (default) → _subagent_auto_deny
      true            → _subagent_auto_approve
    """

    def test_auto_deny_returns_deny(self):
        from tools.delegate_tool import _subagent_auto_deny
        self.assertEqual(
            _subagent_auto_deny("rm -rf /tmp/x", "dangerous"),
            "deny",
        )

    @patch("tools.delegate_tool._load_config", return_value={})
    def test_getter_defaults_to_deny(self, _mock_cfg):
        from tools.delegate_tool import (
            _get_subagent_approval_callback,
            _subagent_auto_deny,
        )
        self.assertIs(_get_subagent_approval_callback(), _subagent_auto_deny)

    @patch(
        "tools.delegate_tool._load_config",
        return_value={"subagent_auto_approve": True},
    )
    def test_getter_true_is_approve(self, _mock_cfg):
        from tools.delegate_tool import (
            _get_subagent_approval_callback,
            _subagent_auto_approve,
        )
        self.assertIs(_get_subagent_approval_callback(), _subagent_auto_approve)

    def test_executor_initializer_installs_callback_in_worker(self):
        """The initializer sets the callback on the worker thread's TLS,
        not the parent's — verifies the fix actually scopes to workers.
        """
        from concurrent.futures import ThreadPoolExecutor
        from tools.terminal_tool import (
            set_approval_callback as _set_cb,
            _get_approval_callback,
        )
        from tools.delegate_tool import _subagent_auto_deny

        # Parent thread has no callback.
        _set_cb(None)
        self.assertIsNone(_get_approval_callback())

        seen = []

        def worker():
            seen.append(_get_approval_callback())

        with ThreadPoolExecutor(
            max_workers=1,
            initializer=_set_cb,
            initargs=(_subagent_auto_deny,),
        ) as executor:
            executor.submit(worker).result()

        self.assertEqual(seen, [_subagent_auto_deny])
        # Parent's callback slot is still empty (TLS isolates threads).
        self.assertIsNone(_get_approval_callback())


class TestFallbackModelInheritance(unittest.TestCase):
    """Subagents must inherit the parent's fallback provider chain."""

    def test_child_inherits_fallback_chain(self):
        """_build_child_agent passes parent._fallback_chain as fallback_model."""
        parent = _make_mock_parent(depth=0)
        fallback_entry = {"provider": "openrouter", "model": "gpt-4o-mini", "api_key": "sk-or-x"}
        parent._fallback_chain = [fallback_entry]

        with patch("run_agent.AIAgent") as MockAgent:
            MockAgent.return_value = MagicMock()
            _build_child_agent(
                task_index=0,
                goal="test fallback inheritance",
                context=None,
                toolsets=None,
                model=None,
                max_iterations=10,
                parent_agent=parent,
                task_count=1,
            )

        _, kwargs = MockAgent.call_args
        self.assertEqual(kwargs["fallback_model"], [fallback_entry])

    def test_child_gets_no_fallback_when_parent_chain_empty(self):
        """When parent._fallback_chain is empty, fallback_model is None."""
        parent = _make_mock_parent(depth=0)
        parent._fallback_chain = []

        with patch("run_agent.AIAgent") as MockAgent:
            MockAgent.return_value = MagicMock()
            _build_child_agent(
                task_index=0,
                goal="test no fallback",
                context=None,
                toolsets=None,
                model=None,
                max_iterations=10,
                parent_agent=parent,
                task_count=1,
            )

        _, kwargs = MockAgent.call_args
        self.assertIsNone(kwargs["fallback_model"])


if __name__ == "__main__":
    unittest.main()