/**
 * Steam Backend - Isoliertes Modul für Steam API Calls
 * Keine Dependencies zu Vite oder Express
 */

/**
 * Ruft Steam API auf und gibt formatierte Spiele zurück
 * @param {string} apiKey - Steam Web API Key
 * @param {string} steamId - Steam User ID
 * @returns {Promise<{games: Array, count: number}>}
 */
export async function fetchSteamGames(apiKey, steamId) {
	if (!apiKey || !steamId) {
		throw new Error("apiKey und steamId sind erforderlich");
	}

	// Steam API aufrufen
	const url = new URL(
		"https://api.steampowered.com/IPlayerService/GetOwnedGames/v1/",
	);
	url.searchParams.set("key", apiKey);
	url.searchParams.set("steamid", steamId);
	url.searchParams.set("include_appinfo", "true");
	url.searchParams.set("include_played_free_games", "true");

	const response = await fetch(url);

	if (!response.ok) {
		throw new Error(
			`Steam API Error: ${response.status} ${response.statusText}`,
		);
	}

	const data = await response.json();
	const rawGames = data.response?.games ?? [];

	// Spiele formatieren
	const games = rawGames.map((game) => ({
		id: `steam-${game.appid}`,
		title: game.name,
		source: "steam",
		sourceId: String(game.appid),
		platform: "PC",
		lastPlayed: game.rtime_last_played
			? new Date(game.rtime_last_played * 1000).toISOString().slice(0, 10)
			: null,
		playtimeHours: Math.round((game.playtime_forever / 60) * 10) / 10,
		url: `https://store.steampowered.com/app/${game.appid}`,
	}));

	return {
		games,
		count: games.length,
	};
}