"""points_gate 中间件单元测试 (#1895)"""

from __future__ import annotations

import asyncio
from unittest.mock import MagicMock, patch

import pytest
from fastapi import HTTPException

import packages.middleware.points_gate as _pg_module
from packages.middleware.points_gate import _execute_with_gate, _extract_kwargs, points_gate


@pytest.fixture(autouse=True)
def _enable_points_gate(monkeypatch):
    """测试用：强制开启 points_gate，绕过 POINTS_ENABLED 默认关闭。"""
    monkeypatch.setattr(_pg_module, "_points_gate_enabled", lambda: True)
    yield


def _make_user(user_id="user-1", is_member=False, member_type=None):
    user = MagicMock()
    user.id = user_id
    user.is_member = is_member
    user.member_type = member_type
    return user


def _make_current_user(user_id="user-1", is_member=False, member_type=None):
    cu = MagicMock()
    cu.user = _make_user(user_id, is_member, member_type)
    return cu


class TestExtractKwargs:
    def test_basic_extraction(self):
        def fn(a, b, c=None):
            pass

        result = _extract_kwargs(fn, (1, 2), {"c": 3})
        assert result == {"a": 1, "b": 2, "c": 3}


class TestPointsGateSync:
    def test_no_user_raises_401(self):
        @points_gate("ai_rewrite")
        def my_func(db=None):
            return "ok"

        with pytest.raises(HTTPException) as exc_info:
            my_func(db=MagicMock())
        assert exc_info.value.status_code == 401

    def test_no_db_raises_500(self):
        @points_gate("ai_rewrite")
        def my_func(current_user=None, db=None):
            return "ok"

        with pytest.raises(HTTPException) as exc_info:
            my_func(current_user=_make_current_user(), db=None)
        assert exc_info.value.status_code == 500

    def test_zero_cost_scene_passes_through(self):
        @points_gate("voice_clone_train")
        def my_func(current_user=None, db=None, **kwargs):
            return kwargs.get("_points_deducted", -1)

        mock_db = MagicMock()
        cu = _make_current_user()
        result = my_func(current_user=cu, db=mock_db)
        assert result == 0


class TestPointsGateExecuteLogic:
    def test_insufficient_points_raises_402(self):
        cu = _make_current_user()
        db = MagicMock()
        mock_svc = MagicMock()
        mock_svc.deduct_points.return_value = {"success": False, "balance": 2, "transaction_id": None}

        def my_func(current_user=cu, db=db, **kwargs):
            return "ok"

        with patch("packages.domain.points_service.PointsService", return_value=mock_svc):
            with pytest.raises(HTTPException) as exc_info:
                _execute_with_gate(
                    my_func, (), {"current_user": cu, "db": db}, "ai_rewrite", None, None, None, is_async=False
                )
            assert exc_info.value.status_code == 402

    def test_free_scene_passes_through(self):
        cu = _make_current_user()
        db = MagicMock()

        def my_func(current_user=cu, db=db, **kwargs):
            return "result"

        result = _execute_with_gate(
            my_func, (), {"current_user": cu, "db": db}, "voice_clone_train", None, None, None, is_async=False
        )
        assert result == "result"

    def test_per_unit_fixed_cost(self):
        cu = _make_current_user()
        db = MagicMock()
        mock_svc = MagicMock()
        mock_svc.deduct_points.return_value = {"success": True, "balance": 90, "transaction_id": "t1"}

        def my_func(current_user=cu, db=db, **kwargs):
            return kwargs.get("_points_deducted", 0)

        with patch("packages.domain.points_service.PointsService", return_value=mock_svc):
            result = _execute_with_gate(
                my_func,
                (),
                {"current_user": cu, "db": db},
                "ai_rewrite",
                per_unit=10,
                unit_field=None,
                quantity_field=None,
                is_async=False,
            )
            assert result == 10
            mock_svc.deduct_points.assert_called_once()

    def test_refund_on_failure(self):
        cu = _make_current_user()
        db = MagicMock()
        mock_svc = MagicMock()
        mock_svc.deduct_points.return_value = {"success": True, "balance": 90, "transaction_id": "t1"}

        def failing_func(current_user=cu, db=db, **kwargs):
            raise RuntimeError("business error")

        with patch("packages.domain.points_service.PointsService", return_value=mock_svc):
            with pytest.raises(RuntimeError, match="business error"):
                _execute_with_gate(
                    failing_func,
                    (),
                    {"current_user": cu, "db": db},
                    "ai_rewrite",
                    per_unit=10,
                    unit_field=None,
                    quantity_field=None,
                    is_async=False,
                )
            mock_svc.refund_points.assert_called_once()

    def test_ai_video_free_quota_for_free_user(self):
        cu = _make_current_user(is_member=False)
        db = MagicMock()
        mock_svc = MagicMock()
        mock_svc.check_daily_free_clip.return_value = True
        mock_svc.record_daily_free_clip.return_value = True

        def my_func(current_user=cu, db=db, **kwargs):
            return kwargs.get("_is_free_quota", False)

        with patch("packages.domain.points_service.PointsService", return_value=mock_svc):
            result = _execute_with_gate(
                my_func, (), {"current_user": cu, "db": db}, "ai_video", None, None, None, is_async=False
            )
            assert result is True


class TestPointsGateAsync:
    @pytest.mark.asyncio
    async def test_async_func_supported(self):
        cu = _make_current_user()
        db = MagicMock()
        mock_svc = MagicMock()
        mock_svc.deduct_points.return_value = {"success": True, "balance": 90, "transaction_id": "t1"}

        @points_gate("ai_rewrite", per_unit=5)
        async def my_async_func(current_user=None, db=None, **kwargs):
            return kwargs.get("_points_deducted", 0)

        with patch("packages.domain.points_service.PointsService", return_value=mock_svc):
            result = await my_async_func(current_user=cu, db=db)
            assert result == 5