"""异步任务管理器测试"""

import asyncio
import json
import pytest
from unittest.mock import AsyncMock, MagicMock, patch
from fastapi import status

from src.functional_scaffold.core.job_manager import (
    JobManager,
    get_job_manager,
    shutdown_job_manager,
)
from src.functional_scaffold.api.models import JobStatus


class TestJobManager:
    """测试 JobManager 类"""

    @pytest.fixture
    def mock_redis(self):
        """模拟 Redis 客户端"""
        mock = AsyncMock()
        mock.ping = AsyncMock(return_value=True)
        mock.hset = AsyncMock()
        mock.hgetall = AsyncMock(return_value={})
        mock.expire = AsyncMock()
        mock.close = AsyncMock()
        return mock

    @pytest.fixture
    def mock_http_client(self):
        """模拟 HTTP 客户端"""
        mock = AsyncMock()
        mock.post = AsyncMock()
        mock.aclose = AsyncMock()
        return mock

    @pytest.mark.asyncio
    async def test_generate_job_id(self):
        """测试任务 ID 生成"""
        manager = JobManager()
        job_id = manager._generate_job_id()

        assert len(job_id) == 12
        assert all(c in "0123456789abcdef" for c in job_id)

    @pytest.mark.asyncio
    async def test_get_timestamp(self):
        """测试时间戳生成"""
        manager = JobManager()
        timestamp = manager._get_timestamp()

        assert "T" in timestamp
        assert timestamp.endswith("+00:00") or timestamp.endswith("Z")

    @pytest.mark.asyncio
    async def test_get_available_algorithms(self):
        """测试获取可用算法列表"""
        manager = JobManager()
        manager._register_algorithms()

        algorithms = manager.get_available_algorithms()

        assert "PrimeChecker" in algorithms

    @pytest.mark.asyncio
    async def test_is_available_without_redis(self):
        """测试 Redis 不可用时的状态"""
        manager = JobManager()

        assert manager.is_available() is False


class TestJobManagerWithMocks:
    """使用 Mock 测试 JobManager"""

    @pytest.mark.asyncio
    async def test_create_job(self):
        """测试创建任务"""
        manager = JobManager()

        # 模拟 Redis
        mock_redis = AsyncMock()
        mock_redis.hset = AsyncMock()
        manager._redis_client = mock_redis
        manager._register_algorithms()

        job_id = await manager.create_job(
            algorithm="PrimeChecker",
            params={"number": 17},
            webhook="https://example.com/callback",
            request_id="test-request-id",
        )

        assert len(job_id) == 12
        mock_redis.hset.assert_called_once()

    @pytest.mark.asyncio
    async def test_create_job_invalid_algorithm(self):
        """测试创建任务时算法不存在"""
        manager = JobManager()

        mock_redis = AsyncMock()
        manager._redis_client = mock_redis
        manager._register_algorithms()

        with pytest.raises(ValueError, match="不存在"):
            await manager.create_job(
                algorithm="NonExistentAlgorithm",
                params={},
            )

    @pytest.mark.asyncio
    async def test_create_job_redis_unavailable(self):
        """测试 Redis 不可用时创建任务"""
        manager = JobManager()
        manager._register_algorithms()

        with pytest.raises(RuntimeError, match="Redis 不可用"):
            await manager.create_job(
                algorithm="PrimeChecker",
                params={"number": 17},
            )

    @pytest.mark.asyncio
    async def test_get_job(self):
        """测试获取任务信息"""
        manager = JobManager()

        mock_redis = AsyncMock()
        mock_redis.hgetall = AsyncMock(
            return_value={
                "status": "completed",
                "algorithm": "PrimeChecker",
                "created_at": "2026-02-02T10:00:00+00:00",
                "started_at": "2026-02-02T10:00:01+00:00",
                "completed_at": "2026-02-02T10:00:02+00:00",
                "result": '{"number": 17, "is_prime": true}',
                "error": "",
                "metadata": '{"elapsed_time": 0.001}',
            }
        )
        manager._redis_client = mock_redis

        job_data = await manager.get_job("test-job-id")

        assert job_data is not None
        assert job_data["job_id"] == "test-job-id"
        assert job_data["status"] == "completed"
        assert job_data["algorithm"] == "PrimeChecker"
        assert job_data["result"]["number"] == 17
        assert job_data["result"]["is_prime"] is True

    @pytest.mark.asyncio
    async def test_get_job_not_found(self):
        """测试获取不存在的任务"""
        manager = JobManager()

        mock_redis = AsyncMock()
        mock_redis.hgetall = AsyncMock(return_value={})
        manager._redis_client = mock_redis

        job_data = await manager.get_job("non-existent-job")

        assert job_data is None

    @pytest.mark.asyncio
    async def test_execute_job(self):
        """测试执行任务"""
        manager = JobManager()

        mock_redis = AsyncMock()
        mock_redis.hgetall = AsyncMock(
            return_value={
                "status": "pending",
                "algorithm": "PrimeChecker",
                "params": '{"number": 17}',
                "webhook": "",
                "request_id": "test-request-id",
                "created_at": "2026-02-02T10:00:00+00:00",
            }
        )
        mock_redis.hset = AsyncMock()
        mock_redis.expire = AsyncMock()
        manager._redis_client = mock_redis
        manager._register_algorithms()

        await manager.execute_job("test-job-id")

        # 验证状态更新被调用
        assert mock_redis.hset.call_count >= 2  # running + completed
        mock_redis.expire.assert_called_once()


class TestJobsAPI:
    """测试 /jobs API 端点"""

    def test_create_job_success(self, client):
        """测试成功创建任务"""
        with patch(
            "src.functional_scaffold.api.routes.get_job_manager", new_callable=AsyncMock
        ) as mock_get_manager:
            mock_manager = MagicMock()
            mock_manager.is_available.return_value = True
            mock_manager.get_available_algorithms.return_value = ["PrimeChecker"]
            mock_manager.create_job = AsyncMock(return_value="abc123def456")
            mock_manager.get_job = AsyncMock(
                return_value={
                    "job_id": "abc123def456",
                    "status": "pending",
                    "algorithm": "PrimeChecker",
                    "created_at": "2026-02-02T10:00:00+00:00",
                }
            )
            mock_manager.execute_job = AsyncMock()
            mock_get_manager.return_value = mock_manager

            response = client.post(
                "/jobs",
                json={
                    "algorithm": "PrimeChecker",
                    "params": {"number": 17},
                },
            )

            assert response.status_code == status.HTTP_202_ACCEPTED
            data = response.json()
            assert data["job_id"] == "abc123def456"
            assert data["status"] == "pending"
            assert data["message"] == "任务已创建"

    def test_create_job_algorithm_not_found(self, client):
        """测试创建任务时算法不存在"""
        with patch(
            "src.functional_scaffold.api.routes.get_job_manager", new_callable=AsyncMock
        ) as mock_get_manager:
            mock_manager = MagicMock()
            mock_manager.is_available.return_value = True
            mock_manager.get_available_algorithms.return_value = ["PrimeChecker"]
            mock_get_manager.return_value = mock_manager

            response = client.post(
                "/jobs",
                json={
                    "algorithm": "NonExistentAlgorithm",
                    "params": {},
                },
            )

            assert response.status_code == status.HTTP_404_NOT_FOUND
            data = response.json()
            assert data["detail"]["error"] == "ALGORITHM_NOT_FOUND"

    def test_create_job_service_unavailable(self, client):
        """测试服务不可用时创建任务"""
        with patch(
            "src.functional_scaffold.api.routes.get_job_manager", new_callable=AsyncMock
        ) as mock_get_manager:
            mock_manager = MagicMock()
            mock_manager.is_available.return_value = False
            mock_get_manager.return_value = mock_manager

            response = client.post(
                "/jobs",
                json={
                    "algorithm": "PrimeChecker",
                    "params": {"number": 17},
                },
            )

            assert response.status_code == status.HTTP_503_SERVICE_UNAVAILABLE

    def test_get_job_status_success(self, client):
        """测试成功查询任务状态"""
        with patch(
            "src.functional_scaffold.api.routes.get_job_manager", new_callable=AsyncMock
        ) as mock_get_manager:
            mock_manager = MagicMock()
            mock_manager.is_available.return_value = True
            mock_manager.get_job = AsyncMock(
                return_value={
                    "job_id": "abc123def456",
                    "status": "completed",
                    "algorithm": "PrimeChecker",
                    "created_at": "2026-02-02T10:00:00+00:00",
                    "started_at": "2026-02-02T10:00:01+00:00",
                    "completed_at": "2026-02-02T10:00:02+00:00",
                    "result": {"number": 17, "is_prime": True},
                    "error": None,
                    "metadata": {"elapsed_time": 0.001},
                }
            )
            mock_get_manager.return_value = mock_manager

            response = client.get("/jobs/abc123def456")

            assert response.status_code == status.HTTP_200_OK
            data = response.json()
            assert data["job_id"] == "abc123def456"
            assert data["status"] == "completed"
            assert data["result"]["is_prime"] is True

    def test_get_job_status_not_found(self, client):
        """测试查询不存在的任务"""
        with patch(
            "src.functional_scaffold.api.routes.get_job_manager", new_callable=AsyncMock
        ) as mock_get_manager:
            mock_manager = MagicMock()
            mock_manager.is_available.return_value = True
            mock_manager.get_job = AsyncMock(return_value=None)
            mock_get_manager.return_value = mock_manager

            response = client.get("/jobs/non-existent-job")

            assert response.status_code == status.HTTP_404_NOT_FOUND
            data = response.json()
            assert data["detail"]["error"] == "JOB_NOT_FOUND"

    def test_get_job_status_service_unavailable(self, client):
        """测试服务不可用时查询任务"""
        with patch(
            "src.functional_scaffold.api.routes.get_job_manager", new_callable=AsyncMock
        ) as mock_get_manager:
            mock_manager = MagicMock()
            mock_manager.is_available.return_value = False
            mock_get_manager.return_value = mock_manager

            response = client.get("/jobs/abc123def456")

            assert response.status_code == status.HTTP_503_SERVICE_UNAVAILABLE


class TestWebhook:
    """测试 Webhook 回调"""

    @pytest.mark.asyncio
    async def test_send_webhook_success(self):
        """测试成功发送 Webhook"""
        manager = JobManager()

        mock_redis = AsyncMock()
        mock_redis.hgetall = AsyncMock(
            return_value={
                "status": "completed",
                "algorithm": "PrimeChecker",
                "created_at": "2026-02-02T10:00:00+00:00",
                "completed_at": "2026-02-02T10:00:02+00:00",
                "result": '{"number": 17, "is_prime": true}',
                "error": "",
                "metadata": '{"elapsed_time": 0.001}',
            }
        )
        manager._redis_client = mock_redis

        mock_response = MagicMock()
        mock_response.status_code = 200

        mock_http = AsyncMock()
        mock_http.post = AsyncMock(return_value=mock_response)
        manager._http_client = mock_http

        await manager._send_webhook("test-job-id", "https://example.com/callback")

        mock_http.post.assert_called_once()
        call_args = mock_http.post.call_args
        assert call_args[0][0] == "https://example.com/callback"
        assert "json" in call_args[1]

    @pytest.mark.asyncio
    async def test_send_webhook_retry_on_failure(self):
        """测试 Webhook 失败时重试"""
        manager = JobManager()

        mock_redis = AsyncMock()
        mock_redis.hgetall = AsyncMock(
            return_value={
                "status": "completed",
                "algorithm": "PrimeChecker",
                "created_at": "2026-02-02T10:00:00+00:00",
                "completed_at": "2026-02-02T10:00:02+00:00",
                "result": "{}",
                "error": "",
                "metadata": "{}",
            }
        )
        manager._redis_client = mock_redis

        mock_http = AsyncMock()
        mock_http.post = AsyncMock(side_effect=Exception("Connection error"))
        manager._http_client = mock_http

        # 使用较短的重试间隔进行测试
        with patch("src.functional_scaffold.core.job_manager.settings") as mock_settings:
            mock_settings.webhook_max_retries = 2
            mock_settings.webhook_timeout = 1

            await manager._send_webhook("test-job-id", "https://example.com/callback")

        # 验证重试次数
        assert mock_http.post.call_count == 2