import { describe, it, expect } from "vitest";

import {
  REVIEW_COMMENT_MAX,
  REVIEW_HOST_RESPONSE_MAX,
  REVIEW_RATING_MAX,
  REVIEW_RATING_MIN,
  formatAverageRating,
  isValidRating,
} from "@/lib/reviews";

describe("rating constants", () => {
  it("min=1 max=5", () => {
    expect(REVIEW_RATING_MIN).toBe(1);
    expect(REVIEW_RATING_MAX).toBe(5);
  });
  it("comment + host response caps are sensible", () => {
    expect(REVIEW_COMMENT_MAX).toBeGreaterThan(0);
    expect(REVIEW_HOST_RESPONSE_MAX).toBeGreaterThan(0);
  });
});

describe("isValidRating", () => {
  it("accepts integers 1-5", () => {
    for (let i = REVIEW_RATING_MIN; i <= REVIEW_RATING_MAX; i++) {
      expect(isValidRating(i)).toBe(true);
    }
  });
  it("rejects out-of-range", () => {
    expect(isValidRating(0)).toBe(false);
    expect(isValidRating(6)).toBe(false);
    expect(isValidRating(-1)).toBe(false);
  });
  it("rejects non-integers and non-numbers", () => {
    expect(isValidRating(3.5)).toBe(false);
    expect(isValidRating("3")).toBe(false);
    expect(isValidRating(null)).toBe(false);
    expect(isValidRating(undefined)).toBe(false);
  });
});

describe("formatAverageRating", () => {
  it("returns dash for null", () => {
    expect(formatAverageRating(null)).toMatch(/—|-|n\/a/i);
  });
  it("formats a number with one decimal", () => {
    const s = formatAverageRating(4.567);
    expect(s).toMatch(/4[.,]/);
  });
});