import { writeFileSync, statSync, mkdirSync } from 'node:fs';
import { execFileSync } from 'node:child_process';
import { join, dirname, basename } from 'node:path';
import { fileURLToPath } from 'node:url';

const FEED_URL = 'https://kute.o-k-i.net/@annu_kute_cedric/feed';
const ROOT = join(dirname(fileURLToPath(import.meta.url)), '..');
const EPISODES_DIR = join(ROOT, 'static', 'images', 'episodes');
const CHANNEL_COVER = join(ROOT, 'static', 'images', 'podcast-cover.webp');

mkdirSync(EPISODES_DIR, { recursive: true });

const xml = await (await fetch(FEED_URL)).text();

const urls = new Set();
const channel = xml.split('<item')[0] ?? '';
const channelMatch =
	channel.match(/<itunes:image[^>]*href="([^"]+)"/i) ?? channel.match(/<url>([^<]+)<\/url>/i);
if (channelMatch) urls.add(channelMatch[1]);

for (const item of xml.split(/<item[\s>]/i).slice(1)) {
	const match = item.match(/<itunes:image[^>]*href="([^"]+)"/i);
	if (match) urls.add(match[1]);
}

let total = 0;

for (const url of urls) {
	const isChannel = url === channelMatch?.[1];
	const out = isChannel
		? CHANNEL_COVER
		: join(EPISODES_DIR, basename(url).replace(/\.(png|jpe?g|gif|webp)$/i, '.webp'));
	try {
		const res = await fetch(url);
		if (!res.ok) {
			console.warn(`[covers] HTTP ${res.status} pour ${url}`);
			continue;
		}
		const source = Buffer.from(await res.arrayBuffer());
		const tmp = `/tmp/opencode/cover-${Date.now()}`;
		writeFileSync(tmp, source);
		execFileSync('convert', [tmp, '-resize', '512x512>', '-quality', '82', '-define', 'webp:method=6', out]);
		const size = statSync(out).size;
		total += size;
		console.log(`[covers] ${basename(out)} : ${Math.round(source.length / 1024)} Ko → ${Math.round(size / 1024)} Ko`);
	} catch (err) {
		console.warn(`[covers] échec pour ${url}:`, err.message);
	}
}

console.log(`[covers] total optimisé : ${Math.round(total / 1024)} Ko`);