/*
 * Copyright (C) 2025 Jakub Žitník
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */
import cron from 'node-cron';
import { exec } from 'child_process';
import { scheduleRules, toMinutes } from './scheduleRules.js';

function runScraper() {
  console.log(`Running scraper at ${new Date().toLocaleString()}...`);
  exec('node scrape/scraper.js', (error, stdout, stderr) => {
    if (error) {
      console.error(`Scraper error: ${error.message}`);
      return;
    }
    if (stderr) console.error(`Scraper stderr: ${stderr}`);
    if (stdout) console.log(`Scraper output:\n${stdout}`);
  });
}

function createSchedules(rules) {
  rules.forEach(rule => {
    const startMin = toMinutes(rule.start);
    const endMin = toMinutes(rule.end === "0:00" ? "24:00" : rule.end);
    const times = [];

    const adjustedEnd = endMin <= startMin ? endMin + 1440 : endMin;
    for (let t = startMin; t < adjustedEnd; t += rule.interval) {
      const h = Math.floor(t % 1440 / 60);
      const m = t % 60;
      times.push({ h, m });
    }

    times.forEach(({ h, m }) => {
      const cronExpr = `${m} ${h} * * *`;
      cron.schedule(cronExpr, runScraper);
      console.log(`Scheduled: ${cronExpr}`);
    });
  });
}

// Run immediately at start
runScraper();

createSchedules(scheduleRules);

console.log('Cron scheduler started with custom intervals.');