"""
工作流执行引擎测试
"""
import pytest
from app.services.workflow_engine import WorkflowEngine


@pytest.mark.unit
@pytest.mark.workflow
class TestWorkflowEngine:
    """工作流引擎测试"""
    
    def test_build_execution_graph(self):
        """测试构建执行图"""
        workflow_data = {
            "nodes": [
                {"id": "start-1", "type": "start"},
                {"id": "llm-1", "type": "llm"},
                {"id": "end-1", "type": "end"}
            ],
            "edges": [
                {"id": "e1", "source": "start-1", "target": "llm-1"},
                {"id": "e2", "source": "llm-1", "target": "end-1"}
            ]
        }
        
        engine = WorkflowEngine("test-workflow", workflow_data)
        execution_order = engine.build_execution_graph()
        
        assert "start-1" in execution_order
        assert "llm-1" in execution_order
        assert "end-1" in execution_order
        assert execution_order.index("start-1") < execution_order.index("llm-1")
        assert execution_order.index("llm-1") < execution_order.index("end-1")
    
    def test_get_node_input(self):
        """测试获取节点输入"""
        workflow_data = {
            "nodes": [
                {"id": "start-1", "type": "start"},
                {"id": "llm-1", "type": "llm"}
            ],
            "edges": [
                {"id": "e1", "source": "start-1", "target": "llm-1"}
            ]
        }
        
        engine = WorkflowEngine("test-workflow", workflow_data)
        engine.node_outputs = {
            "start-1": {"input": "test data"}
        }
        
        input_data = engine.get_node_input("llm-1", engine.node_outputs)
        assert "input" in input_data
        assert input_data["input"] == "test data"
    
    @pytest.mark.asyncio
    async def test_execute_start_node(self):
        """测试执行开始节点"""
        workflow_data = {
            "nodes": [
                {"id": "start-1", "type": "start", "data": {"label": "开始"}}
            ],
            "edges": []
        }
        
        engine = WorkflowEngine("test-workflow", workflow_data)
        node = workflow_data["nodes"][0]
        input_data = {"test": "data"}
        
        result = await engine.execute_node(node, input_data)
        assert result["status"] == "success"
        assert result["output"] == input_data
    
    @pytest.mark.asyncio
    async def test_execute_end_node(self):
        """测试执行结束节点"""
        workflow_data = {
            "nodes": [
                {"id": "end-1", "type": "end", "data": {"label": "结束"}}
            ],
            "edges": []
        }
        
        engine = WorkflowEngine("test-workflow", workflow_data)
        node = workflow_data["nodes"][0]
        input_data = {"result": "final output"}
        
        result = await engine.execute_node(node, input_data)
        assert result["status"] == "success"
        assert result["output"] == input_data
    
    @pytest.mark.asyncio
    async def test_execute_condition_node(self):
        """测试执行条件节点"""
        workflow_data = {
            "nodes": [
                {
                    "id": "condition-1",
                    "type": "condition",
                    "data": {
                        "label": "条件判断",
                        "expression": "{value} > 10"
                    }
                }
            ],
            "edges": []
        }
        
        engine = WorkflowEngine("test-workflow", workflow_data)
        node = workflow_data["nodes"][0]
        
        # 测试条件为真
        input_data = {"value": 15}
        result = await engine.execute_node(node, input_data)
        assert result["status"] == "success"
        assert result["branch"] == "true"
        
        # 测试条件为假
        input_data = {"value": 5}
        result = await engine.execute_node(node, input_data)
        assert result["status"] == "success"
        assert result["branch"] == "false"
    
    @pytest.mark.asyncio
    async def test_execute_transform_node(self):
        """测试执行转换节点"""
        workflow_data = {
            "nodes": [
                {
                    "id": "transform-1",
                    "type": "transform",
                    "data": {
                        "label": "数据转换",
                        "mode": "mapping",
                        "mapping": {
                            "new_field": "{old_field}"
                        }
                    }
                }
            ],
            "edges": []
        }
        
        engine = WorkflowEngine("test-workflow", workflow_data)
        node = workflow_data["nodes"][0]
        input_data = {"old_field": "test value"}
        
        result = await engine.execute_node(node, input_data)
        assert result["status"] == "success"
        assert "new_field" in result["output"]
        assert result["output"]["new_field"] == "test value"