"""Event Crawler — 爬取 hm.zhiweidata.ai/events 数据存入 events 表。

TODO: 替换为真实爬虫逻辑。当前返回占位数据。
"""
import logging
from datetime import datetime, date, timedelta, timezone

from sqlalchemy import select
from sqlalchemy.ext.asyncio import AsyncSession

from app.database import async_session
from app.models.event import Event, EventStatus, EventLevel

logger = logging.getLogger(__name__)

PLACEHOLDER_EVENTS = [
    {
        "title": "taiwan Gateway 频繁重启",
        "level": EventLevel.A,
        "domain": "gateway",
        "status": EventStatus.ACTIVE,
        "occurred_date": date.today() - timedelta(days=1),
        "last_reviewed": datetime.now(timezone.utc) - timedelta(hours=6),
        "no_new_info_count": 0,
        "next_review": datetime.now(timezone.utc) + timedelta(hours=6),
    },
    {
        "title": "guangxi 爬虫数据延迟",
        "level": EventLevel.B,
        "domain": "crawler",
        "status": EventStatus.ACTIVE,
        "occurred_date": date.today() - timedelta(days=2),
        "last_reviewed": datetime.now(timezone.utc) - timedelta(days=1),
        "no_new_info_count": 1,
        "next_review": datetime.now(timezone.utc) + timedelta(hours=12),
    },
    {
        "title": "飞书 Webhook 推送异常",
        "level": EventLevel.B,
        "domain": "feishu",
        "status": EventStatus.FADING,
        "occurred_date": date.today() - timedelta(days=5),
        "last_reviewed": datetime.now(timezone.utc) - timedelta(days=2),
        "no_new_info_count": 3,
        "next_review": datetime.now(timezone.utc) + timedelta(days=1),
    },
    {
        "title": "ops-engineer 日报生成失败",
        "level": EventLevel.C,
        "domain": "reporter",
        "status": EventStatus.FADING,
        "occurred_date": date.today() - timedelta(days=7),
        "last_reviewed": datetime.now(timezone.utc) - timedelta(days=3),
        "no_new_info_count": 4,
        "next_review": datetime.now(timezone.utc) - timedelta(days=1),
    },
    {
        "title": "hebo 数据库连接超时",
        "level": EventLevel.A,
        "domain": "database",
        "status": EventStatus.DISSIPATING,
        "occurred_date": date.today() - timedelta(days=14),
        "last_reviewed": datetime.now(timezone.utc) - timedelta(days=7),
        "no_new_info_count": 6,
        "next_review": datetime.now(timezone.utc) - timedelta(days=3),
    },
    {
        "title": "密钥轮换提醒 (taiwan)",
        "level": EventLevel.C,
        "domain": "security",
        "status": EventStatus.DISSIPATING,
        "occurred_date": date.today() - timedelta(days=20),
        "last_reviewed": datetime.now(timezone.utc) - timedelta(days=10),
        "no_new_info_count": 5,
        "next_review": datetime.now(timezone.utc) - timedelta(days=5),
    },
    {
        "title": "Gateway 配置同步冲突",
        "level": EventLevel.B,
        "domain": "gateway",
        "status": EventStatus.CLOSED,
        "occurred_date": date.today() - timedelta(days=30),
        "last_reviewed": datetime.now(timezone.utc) - timedelta(days=25),
        "no_new_info_count": 8,
        "next_review": None,
    },
    {
        "title": "网络延迟告警 (overseas node)",
        "level": EventLevel.B,
        "domain": "network",
        "status": EventStatus.ACTIVE,
        "occurred_date": date.today() - timedelta(days=3),
        "last_reviewed": datetime.now(timezone.utc) - timedelta(hours=12),
        "no_new_info_count": 2,
        "next_review": datetime.now(timezone.utc) + timedelta(hours=18),
    },
    {
        "title": "存储空间不足告警",
        "level": EventLevel.C,
        "domain": "storage",
        "status": EventStatus.ACTIVE,
        "occurred_date": date.today() - timedelta(days=4),
        "last_reviewed": None,
        "no_new_info_count": 0,
        "next_review": datetime.now(timezone.utc) + timedelta(days=1),
    },
    {
        "title": "Monitor 心跳超时",
        "level": EventLevel.A,
        "domain": "monitor",
        "status": EventStatus.ACTIVE,
        "occurred_date": date.today() - timedelta(hours=8),
        "last_reviewed": datetime.now(timezone.utc) - timedelta(hours=4),
        "no_new_info_count": 0,
        "next_review": datetime.now(timezone.utc) + timedelta(hours=2),
    },
    {
        "title": "Scheduler 任务积压",
        "level": EventLevel.B,
        "domain": "scheduler",
        "status": EventStatus.FADING,
        "occurred_date": date.today() - timedelta(days=6),
        "last_reviewed": datetime.now(timezone.utc) - timedelta(days=2),
        "no_new_info_count": 3,
        "next_review": datetime.now(timezone.utc) + timedelta(hours=10),
    },
    {
        "title": "API 响应延迟 (p95 > 5s)",
        "level": EventLevel.A,
        "domain": "api",
        "status": EventStatus.ACTIVE,
        "occurred_date": date.today() - timedelta(hours=12),
        "last_reviewed": datetime.now(timezone.utc) - timedelta(hours=3),
        "no_new_info_count": 0,
        "next_review": datetime.now(timezone.utc) + timedelta(hours=4),
    },
]


async def seed_placeholder_events() -> list[Event]:
    """向数据库写入占位事件数据（幂等：清空后重写）。"""
    async with async_session() as db:
        existing = await db.execute(select(Event).limit(1))
        if existing.scalar_one_or_none():
            logger.info("events 表已有数据，跳过占位种子")
            return []

        events = []
        for data in PLACEHOLDER_EVENTS:
            event = Event(**data)
            db.add(event)
            events.append(event)
        await db.commit()
        logger.info("写入 %d 条占位事件", len(events))
        return events


async def run_crawl():
    """定时爬取入口（TODO: 真实 HTTP 爬取 hm.zhiweidata.ai/events）。"""
    logger.info("Event crawler 执行开始")
    await seed_placeholder_events()
    logger.info("Event crawler 执行结束")