"""
执行Agent (Worker) - 竞标任务、执行交付
"""

import time
import json
from typing import Dict, List, Optional, Any
from .models import Task, Bid, Execution, AgentProfile
from .task_board import TaskBoard
from .llm_client import LLMClient, default_client


class Worker:
    """执行Agent"""
    
    def __init__(
        self,
        profile: AgentProfile,
        task_board: TaskBoard,
        llm_client: LLMClient = None
    ):
        self.profile = profile
        self.task_board = task_board
        self.llm = llm_client or default_client
        
        # 注册到任务公告板
        self.task_board.register_agent(profile)
        
        # 当前任务
        self.current_tasks: Dict[str, Execution] = {}
    
    # === 竞标 ===
    
    def bid_for_task(self, task: Task) -> Optional[Bid]:
        """
        为任务竞标
        
        Args:
            task: 任务
        
        Returns:
            竞标书或None
        """
        try:
            # 使用LLM评估任务并生成竞标
            bid_data = self.llm.generate_bid(task.to_dict(), self.profile.to_dict())
            
            bid = Bid(
                task_id=task.id,
                agent_id=self.profile.id,
                capability_match=float(bid_data.get('capability_match', 0.5)),
                estimated_time=int(bid_data.get('estimated_time', 60)),
                confidence=float(bid_data.get('confidence', 0.5)),
                approach=bid_data.get('approach', ''),
                prerequisites=bid_data.get('prerequisites', []),
                alternative_approaches=bid_data.get('alternative_approaches', [])
            )
            
            return bid
        
        except Exception as e:
            return None
    
    # === 执行 ===
    
    def execute_task(self, task: Task, bid: Bid) -> Execution:
        """
        执行任务
        
        Args:
            task: 任务
            bid: 竞标书
        
        Returns:
            Execution对象
        """
        execution = Execution(
            task_id=task.id,
            agent_id=self.profile.id,
            bid_id=bid.id,
            status='running'
        )
        
        self.current_tasks[task.id] = execution
        self.task_board.add_execution(execution)
        
        try:
            # 使用LLM执行任务
            result = self.llm.execute_task(task.to_dict(), bid.approach)
            
            execution.status = 'completed'
            execution.end_time = time.time()
            execution.result = result.get('result') or result
            
            self.task_board.update_execution(execution)
            
            # 更新统计
            duration = execution.end_time - execution.start_time
            self.task_board.update_agent_stats(
                self.profile.id,
                success=True,
                duration=duration
            )
        
        except Exception as e:
            execution.status = 'failed'
            execution.end_time = time.time()
            execution.error = str(e)
            
            self.task_board.update_execution(execution)
            
            # 更新统计
            self.task_board.update_agent_stats(
                self.profile.id,
                success=False,
                duration=time.time() - execution.start_time
            )
        
        finally:
            self.current_tasks.pop(task.id, None)
        
        return execution
    
    def get_status(self) -> Dict:
        """获取Worker状态"""
        return {
            'profile': self.profile.to_dict(),
            'current_tasks': len(self.current_tasks),
            'is_busy': len(self.current_tasks) >= self.profile.max_concurrent_tasks
        }


class WorkerPool:
    """Worker池"""
    
    def __init__(self, task_board: TaskBoard):
        self.task_board = task_board
        self.workers: Dict[str, Worker] = {}
    
    def create_worker(self, profile: AgentProfile, llm_client: LLMClient = None) -> Worker:
        """创建Worker"""
        worker = Worker(profile, self.task_board, llm_client)
        self.workers[profile.id] = worker
        return worker
    
    def get_worker(self, agent_id: str) -> Optional[Worker]:
        """获取Worker"""
        return self.workers.get(agent_id)
    
    def list_workers(self) -> List[Worker]:
        """列出所有Worker"""
        return list(self.workers.values())
    
    def find_available_workers(self) -> List[Worker]:
        """找到空闲的Worker"""
        return [w for w in self.workers.values() if not w.get_status()['is_busy']]


def create_default_workers(task_board: TaskBoard, llm_client: LLMClient = None) -> WorkerPool:
    """创建默认的Worker池"""
    pool = WorkerPool(task_board)
    
    # 创建几个默认的Agent
    default_profiles = [
        AgentProfile(
            id="coder_agent",
            name="代码专家",
            description="擅长代码编写、调试、优化",
            capabilities=["coding", "debugging", "optimization"],
            max_concurrent_tasks=2,
            preferred_task_types=["coding"]
        ),
        AgentProfile(
            id="search_agent",
            name="搜索专家",
            description="擅长信息搜索、资料收集",
            capabilities=["search", "research", "summarization"],
            max_concurrent_tasks=3,
            preferred_task_types=["search"]
        ),
        AgentProfile(
            id="writer_agent",
            name="写作专家",
            description="擅长文档撰写、内容创作",
            capabilities=["writing", "documentation", "translation"],
            max_concurrent_tasks=2,
            preferred_task_types=["writing"]
        ),
        AgentProfile(
            id="analyst_agent",
            name="分析专家",
            description="擅长数据分析、报告生成",
            capabilities=["analysis", "reporting", "visualization"],
            max_concurrent_tasks=2,
            preferred_task_types=["analysis"]
        )
    ]
    
    for profile in default_profiles:
        pool.create_worker(profile, llm_client)
    
    return pool