"""
AmazingData 数据服务平台 - 批量操作 API
"""

from fastapi import APIRouter, Depends, HTTPException
from sqlalchemy.orm import Session
from typing import Optional, List
from datetime import datetime
from backend.models.database import get_db
from backend.models.schemas import (
    BaseResponse, BatchTaskRequest, BatchTaskStatus
)
from backend.models.tables import BatchTask, User
from backend.auth.dependencies import get_current_user
from backend.services.data_service import data_service

router = APIRouter()


@router.post("/execute", response_model=BaseResponse)
async def execute_batch_task(
    request: BatchTaskRequest,
    db: Session = Depends(get_db),
    current_user: Optional[User] = Depends(get_current_user)
):
    """执行批量任务"""
    import threading
    
    # 创建任务记录
    task = BatchTask(
        task_type=request.task_type,
        task_params={
            "codes": request.codes,
            "use_main_contract": request.use_main_contract,
            "trading_days": request.trading_days,
            "batch_size": request.batch_size
        },
        status="pending",
        output_path=request.save_path,
        created_by=current_user.username if current_user else "anonymous"
    )
    db.add(task)
    db.commit()
    db.refresh(task)
    
    def batch_worker():
        """批量工作线程"""
        try:
            task.status = "running"
            task.started_at = datetime.utcnow()
            db.commit()
            
            if request.task_type == "stock":
                result = data_service.batch_get_stock_kline(
                    codes=request.codes,
                    trading_days=request.trading_days,
                    save_path=request.save_path,
                    batch_size=request.batch_size
                )
            elif request.task_type == "future":
                result = data_service.batch_get_future_kline(
                    underlying_codes=request.codes,
                    use_main_contract=request.use_main_contract,
                    trading_days=request.trading_days,
                    save_path=request.save_path
                )
            else:
                task.status = "error"
                task.error_message = f"Unknown task type: {request.task_type}"
                db.commit()
                return
            
            if "error" in result:
                task.status = "error"
                task.error_message = result["error"]
            else:
                task.status = "completed"
                task.success_count = len(result)
                task.completed_at = datetime.utcnow()
            
            db.commit()
            
        except Exception as e:
            task.status = "error"
            task.error_message = str(e)
            db.commit()
    
    thread = threading.Thread(target=batch_worker, daemon=True)
    thread.start()
    
    return BaseResponse(
        data={
            "task_id": task.id,
            "status": "pending",
            "message": "Batch task queued"
        }
    )


@router.get("/tasks", response_model=BaseResponse)
async def list_batch_tasks(
    status: Optional[str] = None,
    task_type: Optional[str] = None,
    db: Session = Depends(get_db),
    current_user: Optional[User] = Depends(get_current_user)
):
    """列出批量任务"""
    query = db.query(BatchTask)
    if status:
        query = query.filter(BatchTask.status == status)
    if task_type:
        query = query.filter(BatchTask.task_type == task_type)
    
    tasks = query.order_by(BatchTask.created_at.desc()).all()
    
    return BaseResponse(data={
        "tasks": [
            {
                "id": t.id,
                "task_type": t.task_type,
                "total_count": t.total_count,
                "processed_count": t.processed_count,
                "success_count": t.success_count,
                "failed_count": t.failed_count,
                "status": t.status,
                "output_path": t.output_path,
                "error_message": t.error_message,
                "started_at": t.started_at.isoformat() if t.started_at else None,
                "completed_at": t.completed_at.isoformat() if t.completed_at else None,
                "created_at": t.created_at.isoformat() if t.created_at else None
            }
            for t in tasks
        ],
        "total": len(tasks)
    })


@router.get("/tasks/{task_id}", response_model=BaseResponse)
async def get_batch_task(
    task_id: int,
    db: Session = Depends(get_db),
    current_user: Optional[User] = Depends(get_current_user)
):
    """获取批量任务详情"""
    task = db.query(BatchTask).filter(BatchTask.id == task_id).first()
    if not task:
        raise HTTPException(status_code=404, detail="Task not found")
    
    return BaseResponse(data={
        "id": task.id,
        "task_type": task.task_type,
        "task_params": task.task_params,
        "total_count": task.total_count,
        "processed_count": task.processed_count,
        "success_count": task.success_count,
        "failed_count": task.failed_count,
        "status": task.status,
        "output_path": task.output_path,
        "error_message": task.error_message,
        "started_at": task.started_at.isoformat() if task.started_at else None,
        "completed_at": task.completed_at.isoformat() if task.completed_at else None,
        "created_at": task.created_at.isoformat() if task.created_at else None
    })