import './setup.ts';

import Pageres from 'pageres';
import fs from 'fs';
import dbConnection from './db.ts';
import Suml from 'suml';
import { calendar } from '../src/calendar/calendar.ts';
import type { Config } from '../locale/config.ts';

const __dirname = new URL('.', import.meta.url).pathname;

const loadSuml = (name: string): unknown => new Suml().parse(fs.readFileSync(`${__dirname}/../data/${name}.suml`).toString());
const config = loadSuml('config') as Config;

const dir = `${__dirname}/../static/calendar`;

const force = process.argv[2] === '-f' || process.argv[2] === '--force';

const shoot = async (url: string, filename: string): Promise<void> => {
    const pr = new Pageres({
        delay: 3,
        scale: 2,
    });
    pr.src(process.env.BASE_URL + url, ['1500x300']);
    for (const buffer of await pr.run()) {
        fs.mkdirSync(dir, { recursive: true });
        const target = `${dir}/${filename}.png`;
        console.log(target);
        fs.writeFileSync(target, buffer);
    }
};

const dumpNameDays = async (): Promise<void> => {
    if (!config.names || !config.names.enabled || !config.names.namedays) {
        return;
    }
    const db = await dbConnection();
    const names = await db.all(`
        SELECT n.name, n.namedays
        FROM names n
        WHERE n.namedays IS NOT NULL
          AND approved = 1
          AND deleted = 0
    `);
    const output: Record<string, string[]> = {};
    for (const { name, namedays } of names) {
        output[name] = namedays.split('|');
    }
    fs.writeFileSync(`${__dirname}/../data/names/namedays.json`, JSON.stringify(output));
};

(async (): Promise<void> => {
    if (!config.calendar?.enabled) {
        return;
    }

    const prevPath = `${__dirname}/../cache/calendar.json`;
    const prev = fs.existsSync(prevPath) ? JSON.parse(fs.readFileSync(prevPath, 'utf-8')) : {};

    const current = calendar.buildSummary();
    const changedYears = new Set();
    for (const day in current) {
        if (!current.hasOwnProperty(day)) {
            continue;
        }
        const year = day.substring(0, 4);
        if (current[day] !== prev[day] || !fs.existsSync(`${dir}/${day}.png`) || force) {
            await shoot(`/${config.calendar.route}/${day}?layout=basic`, `${day}`);
            changedYears.add(year);
        }
        if (!fs.existsSync(`${dir}/${year}-overview.png`) || !fs.existsSync(`${dir}/${year}-labels.png`) || force) {
            changedYears.add(year);
        }
    }

    for (const year of changedYears) {
        await shoot(`/${config.calendar.route}/${year}?layout=basic`, `${year}-overview`);
        await shoot(`/${config.calendar.route}/${year}?layout=basic&labels=true`, `${year}-labels`);
    }

    fs.writeFileSync(prevPath, JSON.stringify(current, null, 4));

    await dumpNameDays();
})();