"""
执行日志API
"""
from fastapi import APIRouter, Depends, Query
from sqlalchemy.orm import Session
from pydantic import BaseModel
from typing import List, Optional
from datetime import datetime
from app.core.database import get_db
from app.models.execution_log import ExecutionLog
from app.models.execution import Execution
from app.models.workflow import Workflow
from app.models.agent import Agent
from app.api.auth import get_current_user
from app.models.user import User
from app.core.exceptions import NotFoundError

router = APIRouter(prefix="/api/v1/execution-logs", tags=["execution-logs"])


class ExecutionLogResponse(BaseModel):
    """执行日志响应模型"""
    id: str
    execution_id: str
    node_id: Optional[str]
    node_type: Optional[str]
    level: str
    message: str
    data: Optional[dict]
    timestamp: datetime
    duration: Optional[int]

    class Config:
        from_attributes = True


@router.get("/executions/{execution_id}", response_model=List[ExecutionLogResponse])
async def get_execution_logs(
    execution_id: str,
    level: Optional[str] = Query(None, description="日志级别筛选: INFO/WARN/ERROR/DEBUG"),
    node_id: Optional[str] = Query(None, description="节点ID筛选"),
    skip: int =Query(0, ge=0),
    limit: int = Query(100, ge=1, le=1000),
    db: Session = Depends(get_db),
    current_user: User = Depends(get_current_user)
):
    """获取执行日志列表"""
    from app.models.agent import Agent
    
    # 验证执行记录是否存在
    execution = db.query(Execution).filter(Execution.id == execution_id).first()
    
    if not execution:
        raise NotFoundError("执行记录", execution_id)
    
    # 验证权限：检查workflow或agent的所有权
    has_permission = False
    if execution.workflow_id:
        workflow = db.query(Workflow).filter(Workflow.id == execution.workflow_id).first()
        if workflow and workflow.user_id == current_user.id:
            has_permission = True
    elif execution.agent_id:
        agent = db.query(Agent).filter(Agent.id == execution.agent_id).first()
        if agent and (agent.user_id == current_user.id or agent.status in ["published", "running"]):
            has_permission = True
    
    if not has_permission:
        raise NotFoundError("执行记录", execution_id)
    
    # 构建查询
    query = db.query(ExecutionLog).filter(
        ExecutionLog.execution_id == execution_id
    )
    
    # 日志级别筛选
    if level:
        query = query.filter(ExecutionLog.level == level.upper())
    
    # 节点ID筛选
    if node_id:
        query = query.filter(ExecutionLog.node_id == node_id)
    
    # 排序和分页
    logs = query.order_by(ExecutionLog.timestamp.asc()).offset(skip).limit(limit).all()
    
    return logs


@router.get("/executions/{execution_id}/summary")
async def get_execution_log_summary(
    execution_id: str,
    db: Session = Depends(get_db),
    current_user: User = Depends(get_current_user)
):
    """获取执行日志摘要（统计信息）"""
    # 验证执行记录是否存在
    execution = db.query(Execution).filter(Execution.id == execution_id).first()
    
    if not execution:
        raise NotFoundError("执行记录", execution_id)
    
    # 验证权限：检查workflow或agent的所有权
    has_permission = False
    if execution.workflow_id:
        workflow = db.query(Workflow).filter(Workflow.id == execution.workflow_id).first()
        if workflow and workflow.user_id == current_user.id:
            has_permission = True
    elif execution.agent_id:
        agent = db.query(Agent).filter(Agent.id == execution.agent_id).first()
        if agent and (agent.user_id == current_user.id or agent.status in ["published", "running"]):
            has_permission = True
    
    if not has_permission:
        raise NotFoundError("执行记录", execution_id)
    
    # 统计各级别日志数量
    from sqlalchemy import func
    level_stats = db.query(
        ExecutionLog.level,
        func.count(ExecutionLog.id).label('count')
    ).filter(
        ExecutionLog.execution_id == execution_id
    ).group_by(ExecutionLog.level).all()
    
    # 统计节点执行情况
    node_stats = db.query(
        ExecutionLog.node_id,
        ExecutionLog.node_type,
        func.count(ExecutionLog.id).label('log_count'),
        func.sum(ExecutionLog.duration).label('total_duration')
    ).filter(
        ExecutionLog.execution_id == execution_id,
        ExecutionLog.node_id.isnot(None)
    ).group_by(ExecutionLog.node_id, ExecutionLog.node_type).all()
    
    # 获取错误日志
    error_logs = db.query(ExecutionLog).filter(
        ExecutionLog.execution_id == execution_id,
        ExecutionLog.level == 'ERROR'
    ).order_by(ExecutionLog.timestamp.desc()).limit(10).all()
    
    return {
        "level_stats": {level: count for level, count in level_stats},
        "node_stats": [
            {
                "node_id": node_id,
                "node_type": node_type,
                "log_count": log_count,
                "total_duration": total_duration
            }
            for node_id, node_type, log_count, total_duration in node_stats
        ],
        "error_logs": [
            {
                "id": log.id,
                "node_id": log.node_id,
                "message": log.message,
                "timestamp": log.timestamp,
                "data": log.data
            }
            for log in error_logs
        ],
        "total_logs": db.query(func.count(ExecutionLog.id)).filter(
            ExecutionLog.execution_id == execution_id
        ).scalar()
    }


@router.get("/executions/{execution_id}/performance")
async def get_execution_performance(
    execution_id: str,
    db: Session = Depends(get_db),
    current_user: User = Depends(get_current_user)
):
    """获取执行性能分析数据"""
    # 验证执行记录是否存在
    execution = db.query(Execution).filter(Execution.id == execution_id).first()
    
    if not execution:
        raise NotFoundError("执行记录", execution_id)
    
    # 验证权限：检查workflow或agent的所有权
    has_permission = False
    if execution.workflow_id:
        workflow = db.query(Workflow).filter(Workflow.id == execution.workflow_id).first()
        if workflow and workflow.user_id == current_user.id:
            has_permission = True
    elif execution.agent_id:
        agent = db.query(Agent).filter(Agent.id == execution.agent_id).first()
        if agent and (agent.user_id == current_user.id or agent.status in ["published", "running"]):
            has_permission = True
    
    if not has_permission:
        raise NotFoundError("执行记录", execution_id)
    
    from sqlalchemy import func
    
    # 获取总执行时间
    total_execution_time = execution.execution_time or 0
    
    # 统计各节点执行时间（按节点ID分组）
    node_performance = db.query(
        ExecutionLog.node_id,
        ExecutionLog.node_type,
        func.sum(ExecutionLog.duration).label('total_duration'),
        func.avg(ExecutionLog.duration).label('avg_duration'),
        func.min(ExecutionLog.duration).label('min_duration'),
        func.max(ExecutionLog.duration).label('max_duration'),
        func.count(ExecutionLog.id).label('execution_count')
    ).filter(
        ExecutionLog.execution_id == execution_id,
        ExecutionLog.node_id.isnot(None),
        ExecutionLog.duration.isnot(None)
    ).group_by(ExecutionLog.node_id, ExecutionLog.node_type).all()
    
    # 按节点类型统计
    type_performance = db.query(
        ExecutionLog.node_type,
        func.sum(ExecutionLog.duration).label('total_duration'),
        func.avg(ExecutionLog.duration).label('avg_duration'),
        func.count(ExecutionLog.id).label('execution_count')
    ).filter(
        ExecutionLog.execution_id == execution_id,
        ExecutionLog.node_type.isnot(None),
        ExecutionLog.duration.isnot(None)
    ).group_by(ExecutionLog.node_type).all()
    
    # 获取执行时间线（按时间顺序）
    timeline_logs = db.query(ExecutionLog).filter(
        ExecutionLog.execution_id == execution_id,
        ExecutionLog.duration.isnot(None),
        ExecutionLog.node_id.isnot(None)
    ).order_by(ExecutionLog.timestamp.asc()).all()
    
    return {
        "total_execution_time": total_execution_time,
        "node_performance": [
            {
                "node_id": node_id,
                "node_type": node_type,
                "total_duration": int(total_duration or 0),
                "avg_duration": float(avg_duration or 0),
                "min_duration": int(min_duration or 0),
                "max_duration": int(max_duration or 0),
                "execution_count": int(execution_count or 0)
            }
            for node_id, node_type, total_duration, avg_duration, min_duration, max_duration, execution_count in node_performance
        ],
        "type_performance": [
            {
                "node_type": node_type,
                "total_duration": int(total_duration or 0),
                "avg_duration": float(avg_duration or 0),
                "execution_count": int(execution_count or 0)
            }
            for node_type, total_duration, avg_duration, execution_count in type_performance
        ],
        "timeline": [
            {
                "timestamp": log.timestamp.isoformat() if log.timestamp else None,
                "node_id": log.node_id,
                "node_type": log.node_type,
                "duration": log.duration,
                "message": log.message
            }
            for log in timeline_logs
        ]
    }