from app.services.scheduler_service import register_scheduled_task, scheduler_service
from app.core.logger import logger


@register_scheduled_task(name="visametric_slot_expire_checker", interval_hours=1)
async def visametric_slot_expire_checker():
    """
    检查 vas_task 中状态为 grabbed 的任务，
    如果 grabbed_history 中的 slot_date 距离现在不足4天，发送企业微信通知
    """
    from app.core.database import AsyncSessionLocal
    from sqlalchemy import select
    from datetime import datetime, timedelta
    from app.models.vas_task import VasTask
    from app.services.wechat_service import WechatService

    try:
        expire_days = 4
        now = datetime.utcnow()
        threshold_date = (now + timedelta(days=expire_days)).strftime("%Y-%m-%d")

        async with AsyncSessionLocal() as db:
            stmt = select(VasTask).where(
                VasTask.routing_key == "auto.slot.dub.de.tourist",
                VasTask.status == "grabbed"
            )
            result = await db.execute(stmt)
            tasks = result.scalars().all()

            expiring_tasks = []
            for task in tasks:
                grabbed_history = task.grabbed_history or {}
                slot_date_str = grabbed_history.get("slot_date", "")
                if not slot_date_str:
                    continue

                try:
                    try:
                        slot_date = datetime.strptime(slot_date_str, "%Y-%m-%d")
                    except ValueError:
                        slot_date = datetime.strptime(slot_date_str, "%d/%m/%Y")
                    if slot_date <= now + timedelta(days=expire_days):
                        expiring_tasks.append({
                            "order_id": task.order_id,
                            "slot_date": slot_date_str,
                            "slot_time": grabbed_history.get("slot_time", "N/A"),
                        })
                except ValueError:
                    logger.warning(f"[Scheduler] Invalid slot_date format: {slot_date_str}")

            if expiring_tasks:
                lines = [f"⚠️ 以下德签 slot 即将到期（不足 {expire_days} 天）："]
                for t in expiring_tasks:
                    lines.append(f"- 订单号: {t['order_id']}, Slot: {t['slot_date']} {t['slot_time']}")

                content = "\n".join(lines)
                await WechatService.push_markdown_no_token(content)
                logger.info(f"[Scheduler] Sent WeChat notification for {len(expiring_tasks)} expiring tasks")
            else:
                logger.info("[Scheduler] No expiring tasks found")

    except Exception as e:
        logger.error(f"[Scheduler] Error in visametric_slot_expire_checker: {e}")