'use strict';

const path = require('path');
const cron = require('node-cron');

require('dotenv').config({ path: path.resolve(__dirname, '../.env') });

const cloudDb = require('../src/config/cloudDatabase');
const planningDb = require('../src/services/planningDatabase');
const { syncJstReferenceTables } = require('../src/services/planningJstReferenceSync');

const TIMEZONE = process.env.JST_REFERENCE_SYNC_TIMEZONE || 'Asia/Shanghai';
const CRON_EXPRESSION = process.env.JST_REFERENCE_SYNC_CRON || '0 22 * * *';
const CHUNK_SIZE = Number.parseInt(process.env.JST_REFERENCE_SYNC_CHUNK_SIZE || '500', 10) || 500;
const LOOKBACK_MINUTES = Number.parseInt(process.env.JST_REFERENCE_SYNC_LOOKBACK_MINUTES || '10', 10) || 10;

let isRunning = false;

async function closePools() {
  await Promise.allSettled([
    cloudDb.close(),
    planningDb.close(),
  ]);
}

async function runSync(reason) {
  if (isRunning) {
    console.log(`[jst-reference-sync-scheduler] 跳过 ${reason}，上一轮同步仍在运行`);
    return;
  }

  isRunning = true;
  const startedAt = new Date();
  console.log(`[jst-reference-sync-scheduler] ${reason} 开始`, startedAt.toISOString());

  try {
    const result = await syncJstReferenceTables({
      table: 'all',
      full: false,
      chunkSize: CHUNK_SIZE,
      lookbackMinutes: LOOKBACK_MINUTES,
      onProgress: (payload) => {
        console.log(
          `[jst-reference-sync-scheduler] ${payload.table} ${payload.fetchedRows}/${payload.totalRows}`
        );
      },
    });
    console.log('[jst-reference-sync-scheduler] 同步完成', JSON.stringify(result));
  } catch (error) {
    console.error('[jst-reference-sync-scheduler] 同步失败:', error);
  } finally {
    await closePools();
    isRunning = false;
    console.log(
      `[jst-reference-sync-scheduler] ${reason} 结束，用时 ${Date.now() - startedAt.getTime()}ms`
    );
  }
}

cron.schedule(CRON_EXPRESSION, () => {
  runSync('每日22点增量同步');
}, {
  timezone: TIMEZONE,
});

setTimeout(() => {
  runSync('进程启动增量同步');
}, 1000);

process.on('SIGINT', async () => {
  console.log('[jst-reference-sync-scheduler] 收到 SIGINT，准备退出');
  await closePools();
  process.exit(0);
});

process.on('SIGTERM', async () => {
  console.log('[jst-reference-sync-scheduler] 收到 SIGTERM，准备退出');
  await closePools();
  process.exit(0);
});

console.log(
  `[jst-reference-sync-scheduler] 已启动，计划 ${CRON_EXPRESSION}，时区 ${TIMEZONE}`
);