import path from 'node:path';
import { openSqlite, type SqlDatabase } from '../sqlite';
import { importLegacyFiles } from './legacy';

export type { SqlDatabase };

export const lastfmDataDirectory = path.resolve(process.env.LASTFM_DATA_DIR ?? 'data/lastfm');
const databasePath = path.join(lastfmDataDirectory, 'lastfm.db');

const schema = `
	CREATE TABLE IF NOT EXISTS scrobbles (
		played_at INTEGER NOT NULL,
		artist TEXT NOT NULL,
		track TEXT NOT NULL,
		album TEXT NOT NULL,
		UNIQUE (played_at, artist, track)
	);
	CREATE INDEX IF NOT EXISTS scrobbles_played_at ON scrobbles (played_at);
	CREATE TABLE IF NOT EXISTS album_covers (
		artist TEXT NOT NULL,
		album TEXT NOT NULL,
		image TEXT NOT NULL,
		PRIMARY KEY (artist, album)
	);
	CREATE TABLE IF NOT EXISTS track_covers (
		artist TEXT NOT NULL,
		track TEXT NOT NULL,
		image TEXT NOT NULL,
		PRIMARY KEY (artist, track)
	);
	CREATE TABLE IF NOT EXISTS cover_images (
		id TEXT PRIMARY KEY,
		content_type TEXT NOT NULL,
		data BLOB NOT NULL
	);
`;

let opening: Promise<SqlDatabase> | null = null;

async function openLastfmDatabase(): Promise<SqlDatabase> {
	const database = await openSqlite(databasePath, schema);
	await importLegacyFiles(database, lastfmDataDirectory);
	return database;
}

export function lastfmDatabase(): Promise<SqlDatabase> {
	opening ??= openLastfmDatabase();
	return opening;
}