from fastapi import APIRouter, Depends, HTTPException
from sqlalchemy.orm import Session
from sqlalchemy import or_
from typing import List, Optional
from datetime import datetime, timezone

from ..database import get_db
from ..models import TaskLog
from ..schemas import TaskLogBase, TaskLogResponse
from .auth import get_current_admin

router = APIRouter(prefix="/api/admin/task-logs", tags=["admin"])

MODULES = {
    "scheduled_refresh_search_cache": "🔍 搜索缓存",
    "scheduled_fetch_trends": "🔥 热点趋势",
    "scheduled_collect": "📡 内容采集",
    "scheduled_generate": "🤖 内容创作",
    "scheduled_optimize": "🔍 合规审查",
    "scheduled_optimize_sources": "📡 信息源优化",
    "scheduled_metrics_sync": "📊 指标同步",
}

@router.get("", response_model=List[TaskLogResponse])
def list_task_logs(
    db: Session = Depends(get_db),
    admin_user=Depends(get_current_admin),
    module_id: Optional[str] = None,
    status: Optional[str] = None,
    date: Optional[str] = None,
    limit: int = 50,
):
    query = db.query(TaskLog)
    if module_id:
        query = query.filter(TaskLog.module_id == module_id)
    if status:
        query = query.filter(TaskLog.status == status)
    if date:
        try:
            dt = datetime.strptime(date, "%Y-%m-%d").replace(tzinfo=timezone.utc)
            next_day = datetime(dt.year, dt.month, dt.day + 1, tzinfo=timezone.utc)
            query = query.filter(TaskLog.started_at >= dt, TaskLog.started_at < next_day)
        except ValueError:
            pass
    logs = query.order_by(TaskLog.started_at.desc()).limit(limit).all()
    return [TaskLogResponse.model_validate(l) for l in logs]

@router.get("/modules")
def list_modules(db: Session = Depends(get_db), admin_user=Depends(get_current_admin)):
    today = datetime.now(timezone.utc).date().isoformat()
    result = []
    for mid, name in MODULES.items():
        latest = db.query(TaskLog).filter(TaskLog.module_id == mid).order_by(TaskLog.started_at.desc()).first()
        total = db.query(TaskLog).filter(TaskLog.module_id == mid).count()
        success = db.query(TaskLog).filter(TaskLog.module_id == mid, TaskLog.status == "success").count()
        failed = db.query(TaskLog).filter(TaskLog.module_id == mid, TaskLog.status == "failed").count()
        running = db.query(TaskLog).filter(TaskLog.module_id == mid, TaskLog.status == "running").count()
        result.append({
            "module_id": mid,
            "name": name,
            "last_run": latest.started_at.isoformat() if latest and latest.started_at else None,
            "last_status": latest.status if latest else None,
            "last_message": latest.message if latest else None,
            "total_runs": total,
            "success_runs": success,
            "failed_runs": failed,
            "running": running,
        })
    return result

@router.get("/{log_id}", response_model=TaskLogResponse)
def get_task_log(log_id: int, db: Session = Depends(get_db), admin_user=Depends(get_current_admin)):
    log = db.query(TaskLog).filter(TaskLog.id == log_id).first()
    if not log:
        raise HTTPException(status_code=404, detail="记录不存在")
    return log

@router.post("", response_model=TaskLogResponse)
def create_task_log(log_data: TaskLogBase, db: Session = Depends(get_db), admin_user=Depends(get_current_admin)):
    log = TaskLog(**log_data.model_dump())
    db.add(log)
    db.commit()
    db.refresh(log)
    return log

@router.put("/{log_id}", response_model=TaskLogResponse)
def update_task_log(log_id: int, log_update: TaskLogBase, db: Session = Depends(get_db), admin_user=Depends(get_current_admin)):
    log = db.query(TaskLog).filter(TaskLog.id == log_id).first()
    if not log:
        raise HTTPException(status_code=404, detail="记录不存在")
    data = log_update.model_dump(exclude_unset=True)
    for field, value in data.items():
        setattr(log, field, value)
    db.commit()
    db.refresh(log)
    return log

@router.delete("/{log_id}")
def delete_task_log(log_id: int, db: Session = Depends(get_db), admin_user=Depends(get_current_admin)):
    log = db.query(TaskLog).filter(TaskLog.id == log_id).first()
    if not log:
        raise HTTPException(status_code=404, detail="记录不存在")
    db.delete(log)
    db.commit()
    return {"message": "删除成功"}