"""Unit tests for the Z.AI / GLM provider profile's thinking-mode wiring.

Z.AI's GLM-4.5-and-later chat models default to thinking-mode ON when the
request omits ``thinking``.  Before the profile emitted the parameter,
``reasoning_config = {"enabled": False}`` was a silent no-op on the direct
Z.AI route — users who turned thinking off kept burning thinking tokens on
every turn (the desktop "thinking reverts to medium" report).

These tests pin the profile's wire-shape contract so Z.AI requests stay
correctly shaped without going live.
"""

from __future__ import annotations

import pytest


@pytest.fixture
def zai_profile():
    """Resolve the registered Z.AI profile through the real discovery path."""
    # ``model_tools`` triggers plugin discovery on import, which is what
    # registers the Z.AI profile in the global provider registry.
    import model_tools  # noqa: F401
    import providers

    profile = providers.get_provider_profile("zai")
    assert profile is not None, "zai provider profile must be registered"
    return profile


class TestZaiThinkingWireShape:
    """``build_api_kwargs_extras`` produces Z.AI's exact wire format."""

    def test_no_preference_omits_thinking(self, zai_profile):
        """No reasoning_config → omit ``thinking`` so the server default
        applies (matches prior behavior for users with no preference)."""
        extra_body, top_level = zai_profile.build_api_kwargs_extras(
            reasoning_config=None, model="glm-5"
        )
        assert extra_body == {}
        assert top_level == {}

    def test_enabled_sends_enabled_marker(self, zai_profile):
        extra_body, top_level = zai_profile.build_api_kwargs_extras(
            reasoning_config={"enabled": True, "effort": "medium"}, model="glm-5"
        )
        assert extra_body == {"thinking": {"type": "enabled"}}
        assert top_level == {}

    def test_explicitly_disabled_sends_disabled_marker(self, zai_profile):
        """``reasoning_config.enabled=False`` → ``thinking.type=disabled``.

        The crucial bit is that the parameter is *sent* at all — GLM defaults
        to thinking-on when ``thinking`` is absent, so an unsent disable
        burns thinking tokens forever.
        """
        extra_body, top_level = zai_profile.build_api_kwargs_extras(
            reasoning_config={"enabled": False}, model="glm-5"
        )
        assert extra_body == {"thinking": {"type": "disabled"}}
        assert top_level == {}

    def test_no_effort_levels_leak_to_top_level(self, zai_profile):
        """GLM has no effort knob — never emit ``reasoning_effort``."""
        for effort in ("minimal", "low", "medium", "high", "xhigh"):
            _, top_level = zai_profile.build_api_kwargs_extras(
                reasoning_config={"enabled": True, "effort": effort}, model="glm-5.2"
            )
            assert top_level == {}


class TestZaiModelGating:
    """GLM 4.5+ get thinking; earlier GLM models are left untouched."""

    @pytest.mark.parametrize(
        "model",
        [
            "glm-4.5",
            "glm-4.5-air",
            "glm-4.5-flash",
            "glm-4.6",
            "glm-5",
            "glm-5.2",
            "GLM-5",  # case-insensitive
        ],
    )
    def test_thinking_capable_models_emit_thinking(self, zai_profile, model):
        extra_body, _ = zai_profile.build_api_kwargs_extras(
            reasoning_config={"enabled": False}, model=model
        )
        assert extra_body == {"thinking": {"type": "disabled"}}

    @pytest.mark.parametrize(
        "model",
        [
            "glm-4-9b",   # pre-4.5, no thinking param
            "glm-4",
            "glm-3-turbo",
            "",            # bare/unknown
            None,          # missing
            "charglm-3",  # non-GLM-versioned id
        ],
    )
    def test_non_thinking_models_emit_nothing(self, zai_profile, model):
        extra_body, top_level = zai_profile.build_api_kwargs_extras(
            reasoning_config={"enabled": False}, model=model
        )
        assert extra_body == {}
        assert top_level == {}


class TestZaiFullKwargsIntegration:
    """End-to-end: the transport's full kwargs carry the thinking marker."""

    def test_disabled_reaches_the_wire(self, zai_profile):
        from agent.transports.chat_completions import ChatCompletionsTransport

        kwargs = ChatCompletionsTransport().build_kwargs(
            model="glm-5",
            messages=[{"role": "user", "content": "ping"}],
            tools=None,
            provider_profile=zai_profile,
            reasoning_config={"enabled": False},
            base_url="https://api.z.ai/api/paas/v4",
            provider_name="zai",
        )
        assert kwargs["extra_body"]["thinking"] == {"type": "disabled"}

    def test_no_preference_keeps_wire_clean(self, zai_profile):
        from agent.transports.chat_completions import ChatCompletionsTransport

        kwargs = ChatCompletionsTransport().build_kwargs(
            model="glm-5",
            messages=[{"role": "user", "content": "ping"}],
            tools=None,
            provider_profile=zai_profile,
            reasoning_config=None,
            base_url="https://api.z.ai/api/paas/v4",
            provider_name="zai",
        )
        assert "thinking" not in kwargs.get("extra_body", {})