import { DatabaseInterface } from './types';
import { SQLiteDatabase } from './sqlite-database';

class DatabaseFactory {
    private static instance: DatabaseInterface | null = null;

    static getInstance(): DatabaseInterface {
        if (!this.instance) {
            // Metro 会根据平台自动选择正确的文件
            // Web: sqlite-database.web.ts
            // Native: sqlite-database.ts
            this.instance = new SQLiteDatabase();
        }
        return this.instance!;
    }

    // 用于测试或重置实例
    static resetInstance(): void {
        this.instance = null;
    }
}

export const database = DatabaseFactory.getInstance();