CREATE TABLE IF NOT EXISTS users (
    id INT AUTO_INCREMENT PRIMARY KEY,
    username VARCHAR(50) NOT NULL UNIQUE,
    password_hash VARCHAR(255) NOT NULL,
    balance DECIMAL(10, 2) DEFAULT 0.00,
    role ENUM('user', 'admin') DEFAULT 'user',
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE IF NOT EXISTS recharges (
    id INT AUTO_INCREMENT PRIMARY KEY,
    user_id INT NOT NULL,
    amount DECIMAL(10, 2) NOT NULL,
    txid VARCHAR(255),
    status ENUM('pending', 'completed', 'rejected') DEFAULT 'pending',
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (user_id) REFERENCES users(id)
);

CREATE TABLE IF NOT EXISTS sms_orders (
    id INT AUTO_INCREMENT PRIMARY KEY,
    user_id INT NOT NULL,
    request_id VARCHAR(50) NOT NULL,
    number VARCHAR(20) NOT NULL,
    service_name VARCHAR(50),
    country_name VARCHAR(50),
    cost DECIMAL(10, 2),
    sms_content TEXT,
    status ENUM('pending', 'received', 'canceled', 'expired') DEFAULT 'pending',
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (user_id) REFERENCES users(id)
);