"""
Skill Executor - 技能执行器
"""
import asyncio
from typing import List, Dict, Any


class SkillExecutor:
    """技能执行器，支持并发/串行执行"""

    def __init__(self, skill_registry=None):
        """
        初始化技能执行器

        Args:
            skill_registry: 技能注册表（可选）
        """
        self.skill_registry = skill_registry
        self._skill_handlers = self._init_default_handlers()

    def _init_default_handlers(self) -> Dict[str, callable]:
        """初始化默认技能处理器"""
        return {
            "query_database": self._handle_query_database,
            "data_analysis": self._handle_data_analysis,
            "search_knowledge": self._handle_search_knowledge,
            "web_search": self._handle_web_search,
        }

    async def execute(self, skill_id: str, params: dict) -> Dict[str, Any]:
        """
        执行单个技能

        Args:
            skill_id: 技能 ID
            params: 技能参数

        Returns:
            Dict: 执行结果
        """
        handler = self._skill_handlers.get(skill_id)

        if not handler:
            return {
                "success": False,
                "error": f"Skill {skill_id} not found"
            }

        try:
            result = await handler(params)
            return {
                "success": True,
                "skill_id": skill_id,
                "result": result
            }
        except Exception as e:
            return {
                "success": False,
                "skill_id": skill_id,
                "error": str(e)
            }

    async def execute_multiple(self, skills: List[Dict], strategy: str = "parallel") -> List[Dict]:
        """
        批量执行技能

        Args:
            skills: 技能列表
            strategy: 执行策略 (parallel/sequential)

        Returns:
            List[Dict]: 执行结果列表
        """
        if strategy == "parallel":
            tasks = [self.execute(s['skill_id'], s['params']) for s in skills]
            results = await asyncio.gather(*tasks, return_exceptions=True)

            # 处理异常结果
            formatted_results = []
            for i, result in enumerate(results):
                if isinstance(result, Exception):
                    formatted_results.append({
                        "success": False,
                        "skill_id": skills[i]['skill_id'],
                        "error": str(result)
                    })
                else:
                    formatted_results.append(result)
            return formatted_results
        else:
            results = []
            for s in skills:
                result = await self.execute(s['skill_id'], s['params'])
                results.append(result)
            return results

    # === 默认技能处理器 ===

    async def _handle_query_database(self, params: dict) -> Dict[str, Any]:
        """处理数据库查询"""
        # TODO: 调用现有的数据库查询功能
        return {
            "message": "数据库查询功能待实现",
            "sql": params.get("sql", "")
        }

    async def _handle_data_analysis(self, params: dict) -> Dict[str, Any]:
        """处理数据分析"""
        # TODO: 调用现有的数据分析功能
        return {
            "message": "数据分析功能待实现",
            "data": params.get("data", {})
        }

    async def _handle_search_knowledge(self, params: dict) -> Dict[str, Any]:
        """处理知识库搜索"""
        # TODO: 调用现有的知识库搜索功能
        return {
            "message": "知识库搜索功能待实现",
            "query": params.get("query", "")
        }

    async def _handle_web_search(self, params: dict) -> Dict[str, Any]:
        """处理网页搜索"""
        # TODO: 实现网页搜索
        return {
            "message": "网页搜索功能待实现",
            "query": params.get("query", "")
        }
