"""Tests for Requirement Service.

This module tests the RequirementService class for requirement analysis.
"""

import pytest
from unittest.mock import MagicMock, AsyncMock, patch
from app.services.requirement_service import RequirementService


@pytest.mark.asyncio
async def test_analyze_requirement():
    """Test requirement analysis with mocked dependencies."""
    # Create service with mocked engines
    with patch('app.services.requirement_service.ClaudeEngine') as MockClaudeEngine, \
         patch('app.services.requirement_service.RAGEngine') as MockRAGEngine, \
         patch('app.services.requirement_service.DatabaseEngine') as MockDBEngine:

        # Setup mocks
        mock_ai_engine = MagicMock()
        mock_ai_engine.call_claude = AsyncMock(return_value='{"功能名称": "销售订单管理", "功能类型": "列表页面"}')
        mock_ai_engine.parse_json_response = MagicMock(return_value={
            "功能名称": "销售订单管理",
            "功能类型": "列表页面"
        })
        MockClaudeEngine.return_value = mock_ai_engine

        mock_rag_engine = MagicMock()
        mock_rag_engine.search = MagicMock(return_value=[
            {"content": "Sample knowledge", "metadata": {"source": "docs"}}
        ])
        MockRAGEngine.return_value = mock_rag_engine

        mock_db_engine = MagicMock()
        mock_db_engine.execute_sql = MagicMock(return_value=[("SYS_FORM",), ("SYS_MENU",)])
        MockDBEngine.return_value = mock_db_engine

        # Create service and test
        service = RequirementService()
        result = await service.analyze(
            user_input="创建一个销售订单管理页面",
            session_id="test-session"
        )

        assert result is not None
        assert "功能名称" in result
        assert result["功能名称"] == "销售订单管理"


@pytest.mark.asyncio
async def test_analyze_requirement_without_session_id():
    """Test that session_id is auto-generated if not provided."""
    with patch('app.services.requirement_service.ClaudeEngine') as MockClaudeEngine, \
         patch('app.services.requirement_service.RAGEngine') as MockRAGEngine, \
         patch('app.services.requirement_service.DatabaseEngine') as MockDBEngine:

        # Setup mocks
        mock_ai_engine = MagicMock()
        mock_ai_engine.call_claude = AsyncMock(return_value='{"功能名称": "测试功能"}')
        mock_ai_engine.parse_json_response = MagicMock(return_value={"功能名称": "测试功能"})
        MockClaudeEngine.return_value = mock_ai_engine

        mock_rag_engine = MagicMock()
        mock_rag_engine.search = MagicMock(return_value=[])
        MockRAGEngine.return_value = mock_rag_engine

        mock_db_engine = MagicMock()
        mock_db_engine.execute_sql = MagicMock(return_value=[])
        MockDBEngine.return_value = mock_db_engine

        # Test without session_id
        service = RequirementService()
        result = await service.analyze(user_input="测试输入")

        assert result is not None
        assert "功能名称" in result


@pytest.mark.asyncio
async def test_get_existing_tables_success():
    """Test successful retrieval of existing tables."""
    with patch('app.services.requirement_service.ClaudeEngine'), \
         patch('app.services.requirement_service.RAGEngine'), \
         patch('app.services.requirement_service.DatabaseEngine') as MockDBEngine:

        mock_db_engine = MagicMock()
        mock_db_engine.execute_sql = MagicMock(return_value=[
            ("SYS_FORM",),
            ("SYS_MENU",),
            ("SYS_USER",)
        ])
        MockDBEngine.return_value = mock_db_engine

        service = RequirementService()
        tables = service._get_existing_tables("测试")

        assert "SYS_FORM" in tables
        assert "SYS_MENU" in tables
        assert "SYS_USER" in tables


@pytest.mark.asyncio
async def test_get_existing_tables_failure():
    """Test handling of database query failure."""
    with patch('app.services.requirement_service.ClaudeEngine'), \
         patch('app.services.requirement_service.RAGEngine'), \
         patch('app.services.requirement_service.DatabaseEngine') as MockDBEngine:

        mock_db_engine = MagicMock()
        mock_db_engine.execute_sql = MagicMock(side_effect=Exception("DB Error"))
        MockDBEngine.return_value = mock_db_engine

        service = RequirementService()
        tables = service._get_existing_tables("测试")

        assert "无法获取现有表信息" in tables