from fastapi import APIRouter, HTTPException, status
from typing import List
from ..schemas.task import (
    JobResponse, AddCronJobRequest, AddIntervalJobRequest,
    AddDateJobRequest, TaskResponse
)
from ..utils.scheduler import task_scheduler, example_task, database_cleanup_task

router = APIRouter(prefix="/tasks", tags=["定时任务管理"])

# 可用的任务函数映射
AVAILABLE_FUNCTIONS = {
    "example_task": example_task,
    "database_cleanup_task": database_cleanup_task,
}

@router.post("/cron", response_model=TaskResponse)
def add_cron_job(request: AddCronJobRequest):
    """添加cron定时任务"""
    try:
        if request.func_name not in AVAILABLE_FUNCTIONS:
            raise HTTPException(
                status_code=status.HTTP_400_BAD_REQUEST,
                detail=f"函数 {request.func_name} 不可用"
            )

        func = AVAILABLE_FUNCTIONS[request.func_name]

        # 构建cron参数
        cron_kwargs = {}
        if request.year is not None:
            cron_kwargs['year'] = request.year
        if request.month is not None:
            cron_kwargs['month'] = request.month
        if request.day is not None:
            cron_kwargs['day'] = request.day
        if request.week is not None:
            cron_kwargs['week'] = request.week
        if request.day_of_week is not None:
            cron_kwargs['day_of_week'] = request.day_of_week
        if request.hour is not None:
            cron_kwargs['hour'] = request.hour
        if request.minute is not None:
            cron_kwargs['minute'] = request.minute
        if request.second is not None:
            cron_kwargs['second'] = request.second

        job = task_scheduler.add_cron_job(func, request.job_id, **cron_kwargs)

        return TaskResponse(
            success=True,
            message=f"Cron任务 {request.job_id} 添加成功",
            data={"job_id": job.id, "next_run": str(job.next_run_time)}
        )

    except Exception as e:
        return TaskResponse(
            success=False,
            message=f"添加Cron任务失败: {str(e)}"
        )

@router.post("/interval", response_model=TaskResponse)
def add_interval_job(request: AddIntervalJobRequest):
    """添加间隔执行任务"""
    try:
        if request.func_name not in AVAILABLE_FUNCTIONS:
            raise HTTPException(
                status_code=status.HTTP_400_BAD_REQUEST,
                detail=f"函数 {request.func_name} 不可用"
            )

        func = AVAILABLE_FUNCTIONS[request.func_name]

        # 构建interval参数
        interval_kwargs = {}
        if request.seconds is not None:
            interval_kwargs['seconds'] = request.seconds
        if request.minutes is not None:
            interval_kwargs['minutes'] = request.minutes
        if request.hours is not None:
            interval_kwargs['hours'] = request.hours
        if request.days is not None:
            interval_kwargs['days'] = request.days

        job = task_scheduler.add_interval_job(func, request.job_id, **interval_kwargs)

        return TaskResponse(
            success=True,
            message=f"间隔任务 {request.job_id} 添加成功",
            data={"job_id": job.id, "next_run": str(job.next_run_time)}
        )

    except Exception as e:
        return TaskResponse(
            success=False,
            message=f"添加间隔任务失败: {str(e)}"
        )

@router.post("/date", response_model=TaskResponse)
def add_date_job(request: AddDateJobRequest):
    """添加指定时间执行任务"""
    try:
        if request.func_name not in AVAILABLE_FUNCTIONS:
            raise HTTPException(
                status_code=status.HTTP_400_BAD_REQUEST,
                detail=f"函数 {request.func_name} 不可用"
            )

        func = AVAILABLE_FUNCTIONS[request.func_name]
        job = task_scheduler.add_date_job(func, request.job_id, run_date=request.run_date)

        return TaskResponse(
            success=True,
            message=f"定时任务 {request.job_id} 添加成功",
            data={"job_id": job.id, "run_date": str(job.next_run_time)}
        )

    except Exception as e:
        return TaskResponse(
            success=False,
            message=f"添加定时任务失败: {str(e)}"
        )

@router.get("/", response_model=List[JobResponse])
def get_jobs():
    """获取所有任务"""
    jobs = task_scheduler.get_jobs()
    result = []
    for job in jobs:
        result.append(JobResponse(
            id=job.id,
            name=job.name,
            func=str(job.func),
            trigger=str(job.trigger),
            next_run_time=job.next_run_time
        ))
    return result

@router.delete("/{job_id}", response_model=TaskResponse)
def remove_job(job_id: str):
    """删除任务"""
    success = task_scheduler.remove_job(job_id)
    if success:
        return TaskResponse(
            success=True,
            message=f"任务 {job_id} 删除成功"
        )
    else:
        return TaskResponse(
            success=False,
            message=f"删除任务 {job_id} 失败"
        )

@router.put("/{job_id}/pause", response_model=TaskResponse)
def pause_job(job_id: str):
    """暂停任务"""
    success = task_scheduler.pause_job(job_id)
    if success:
        return TaskResponse(
            success=True,
            message=f"任务 {job_id} 已暂停"
        )
    else:
        return TaskResponse(
            success=False,
            message=f"暂停任务 {job_id} 失败"
        )

@router.put("/{job_id}/resume", response_model=TaskResponse)
def resume_job(job_id: str):
    """恢复任务"""
    success = task_scheduler.resume_job(job_id)
    if success:
        return TaskResponse(
            success=True,
            message=f"任务 {job_id} 已恢复"
        )
    else:
        return TaskResponse(
            success=False,
            message=f"恢复任务 {job_id} 失败"
        )

@router.get("/functions", response_model=List[str])
def get_available_functions():
    """获取可用的任务函数列表"""
    return list(AVAILABLE_FUNCTIONS.keys())