"""
APScheduler — 仅保留 wxid/数据库切换检测。
（不再运行任何 AI 分类轮询：AI 分析改为用户手动按时间窗口触发）
"""

import logging

from apscheduler.schedulers.asyncio import AsyncIOScheduler
from database import update_db_path

log = logging.getLogger(__name__)
scheduler = AsyncIOScheduler(timezone="Asia/Shanghai")
_sync_failures = 0


def register_poll_job(group_id: int, poll_interval: int):
    """已废弃。保留空函数避免其他模块旧引用炸。"""
    log.debug(f"[scheduler] register_poll_job called (no-op now): group={group_id}")


def _reschedule_sync(seconds: int):
    if scheduler.get_job("sync_jobs"):
        scheduler.remove_job("sync_jobs")
    scheduler.add_job(_sync_jobs, "interval", seconds=seconds, id="sync_jobs")


async def _sync_jobs():
    """定期触发 wxid 重新检测，让账号切换能自动切换数据库。"""
    global _sync_failures
    try:
        await update_db_path()
        if _sync_failures > 0:
            _sync_failures = 0
            _reschedule_sync(10)
    except Exception as e:
        _sync_failures += 1
        log.error(f"[scheduler] sync error (consecutive={_sync_failures}): {e}")
        if _sync_failures == 3:
            _reschedule_sync(60)
            log.warning("[scheduler] sync backoff to 60s after 3 failures")


async def start_scheduler():
    scheduler.add_job(_sync_jobs, "interval", seconds=10, id="sync_jobs")
    scheduler.start()
    # Do not block FastAPI startup on chatlog. Electron starts the backend
    # before chatlog, so the first account sync must happen in the background.
    scheduler.add_job(_sync_jobs, "date", id="sync_jobs_initial")
    log.info("[scheduler] started (db-path watcher only, no poll jobs)")