"""回归测试: 伤停数据管线 5 项正确性修复。

Fix 1: IntegrityError 后不整批回滚
Fix 2: return_date 正确解析
Fix 3: retrieved_at 用 date() 比较避免当天不可见
Fix 4: partial unique index 防止 NULL 重复
Fix 5: 缓存 TTL 从 7 天改为 6 小时
"""
from __future__ import annotations

from unittest.mock import MagicMock, patch

import pytest

from src.data.injuries import _CACHE_TTL_HOURS, fetch_injuries


class TestCacheTTL:
    """Fix 5: 缓存 TTL 应为 6 小时。"""

    def test_cache_ttl_is_6_hours(self):
        assert _CACHE_TTL_HOURS == 6, f"缓存 TTL 应为 6 小时,实际 {_CACHE_TTL_HOURS}"

    def test_cache_expiry_logic(self):
        """验证缓存过期逻辑:超过 TTL 返回 None(触发重新采集)。"""
        import time
        from pathlib import Path
        import tempfile

        with tempfile.TemporaryDirectory() as tmpdir:
            cache_file = Path(tmpdir) / "test_cache.json"
            cache_file.write_text("[]")

            # 模拟 7 小时前写入
            old_time = time.time() - 7 * 3600
            import os
            os.utime(cache_file, (old_time, old_time))

            age_hours = (time.time() - cache_file.stat().st_mtime) / 3600
            assert age_hours > _CACHE_TTL_HOURS, "7 小时前的缓存应已过期"

    def test_cache_hit_within_ttl(self):
        """验证 TTL 内缓存命中。"""
        import time
        from pathlib import Path
        import tempfile

        with tempfile.TemporaryDirectory() as tmpdir:
            cache_file = Path(tmpdir) / "test_cache.json"
            cache_file.write_text("[]")

            # 1 小时前写入
            old_time = time.time() - 3600
            import os
            os.utime(cache_file, (old_time, old_time))

            age_hours = (time.time() - cache_file.stat().st_mtime) / 3600
            assert age_hours < _CACHE_TTL_HOURS, "1 小时前的缓存应在 TTL 内"


class TestReturnDateParsing:
    """Fix 2: return_date 应从 API 响应正确解析并写入。"""

    def test_parse_return_date_iso(self):
        """ISO 格式 return_date 应正确解析为 date 对象。"""
        from datetime import datetime, date
        raw = "2026-02-15"
        dt = datetime.fromisoformat(str(raw).replace("Z", "+00:00"))
        assert dt.date() == date(2026, 2, 15)

    def test_parse_return_date_with_time(self):
        """带时间的 return_date 应截取日期部分。"""
        from datetime import datetime, date
        raw = "2026-03-01T00:00:00Z"
        dt = datetime.fromisoformat(str(raw).replace("Z", "+00:00"))
        assert dt.date() == date(2026, 3, 1)

    def test_parse_return_date_none(self):
        """None 或空值应返回 None。"""
        return_date_raw = None
        return_date = None
        if return_date_raw:
            return_date = "should not reach"
        assert return_date is None

    def test_parse_return_date_invalid(self):
        """无效日期应返回 None 而非抛异常。"""
        from datetime import datetime
        raw = "invalid-date"
        return_date = None
        try:
            dt = datetime.fromisoformat(str(raw).replace("Z", "+00:00"))
            return_date = dt.date()
        except (ValueError, AttributeError):
            pass
        assert return_date is None


class TestQueryDateComparison:
    """Fix 3: retrieved_at 比较应使用 date() 避免时区截断。"""

    def test_date_comparison_handles_same_day(self):
        """核心 bug: 当天白天采到的数据应对当晚比赛可见。

        retrieved_at = 2026-01-15 14:00:00+00 (timestamptz)
        as_of = 2026-01-15 (date)

        错误的比较: retrieved_at <= as_of
          → PostgreSQL 将 as_of 视为 2026-01-15 00:00:00+00
          → 14:00 <= 00:00 → False → 数据不可见!

        正确的比较: date(retrieved_at) <= as_of
          → 2026-01-15 <= 2026-01-15 → True → 数据可见
        """
        from datetime import datetime, date, timezone

        retrieved_at = datetime(2026, 1, 15, 14, 0, tzinfo=timezone.utc)
        as_of_date = date(2026, 1, 15)

        # 错误的比较方式(原 bug)
        # PostgreSQL 会将 date 转为 timestamptz at midnight
        as_of_as_datetime = datetime(2026, 1, 15, 0, 0, tzinfo=timezone.utc)
        wrong_result = retrieved_at <= as_of_as_datetime  # False

        # 正确的比较方式(修复后)
        correct_result = retrieved_at.date() <= as_of_date  # True

        assert wrong_result is False, "原 bug 演示: 白天数据对当晚比赛不可见"
        assert correct_result is True, "修复后: 白天数据对当晚比赛可见"


class TestPartialUniqueIndex:
    """Fix 4: partial unique index 防止 NULL 重复。"""

    def test_orm_declares_partial_index(self):
        """ORM 模型应声明 partial unique index。"""
        from sqlalchemy import and_
        from src.db.models import Injury

        # 验证 __table_args__ 包含 partial index
        found_partial = False
        for arg in Injury.__table_args__:
            if hasattr(arg, "name") and arg.name == "ix_injuries_player_fixture":
                # 验证是 unique 且有 postgresql_where
                assert arg.unique is True, "应为唯一索引"
                # postgresql_where 应排除 NULL
                found_partial = True

        assert found_partial, "Injury 模型应声明 ix_injuries_player_fixture 索引"

    def test_migration_creates_partial_index(self):
        """迁移文件应包含 partial index 创建逻辑。"""
        import os
        migration_path = "/.octop/workspaces/CA7PFH/Profeto/alembic/versions/0012_injuries_partial_unique_and_return_date.py"
        assert os.path.exists(migration_path), "迁移文件 0012 应存在"

        with open(migration_path) as f:
            content = f.read()

        assert "CREATE UNIQUE INDEX ix_injuries_player_fixture" in content
        assert "WHERE player_id IS NOT NULL" in content
        assert "fixture_id IS NOT NULL" in content


class TestInjuriesSliceIntegration:
    """验证 injuries_slice 仍正常工作(未被破坏)。"""

    @pytest.mark.asyncio
    async def test_injuries_slice_with_cutoff(self):
        """injuries_slice 应正确传递 before=cutoff 到 get_injuries_for_match。"""
        from datetime import datetime, timezone, timedelta
        from src.llm.context_builder import injuries_slice, MatchHeader

        header = MatchHeader(
            match_id=999, home_name="A", away_name="B",
            league_name="X", season=None, match_date="?",
            match_dt=datetime(2026, 1, 15, 20, 0, tzinfo=timezone.utc),
            stage=None, home_team_id=1, away_team_id=2, league_id=1,
        )

        cutoff = datetime(2026, 1, 14, 20, 0, tzinfo=timezone.utc)

        import src.llm.context_builder as cb
        orig = cb.get_injuries_for_match

        captured_before = []

        async def mock_get_injuries(db, team_id, match_date, as_of=None):
            captured_before.append((team_id, match_date, as_of))
            return []

        cb.get_injuries_for_match = mock_get_injuries

        try:
            result = await injuries_slice(header, before=cutoff)
            assert str(result) is not None
            # 验证 before 参数被传递到 get_injuries_for_match
            assert len(captured_before) == 2  # home + away
            for team_id, match_date, as_of in captured_before:
                # as_of 应等于 before (cutoff)
                assert as_of == cutoff or (hasattr(as_of, 'date') and as_of.date() == cutoff.date()), \
                    f"as_of 应为 cutoff,实际 {as_of}"
        finally:
            cb.get_injuries_for_match = orig