-- 客户信息表
CREATE TABLE IF NOT EXISTS customers (
    id INT AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(255) NOT NULL,
    phone VARCHAR(20) NOT NULL UNIQUE,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

-- 消息记录表
CREATE TABLE IF NOT EXISTS messages (
    id INT AUTO_INCREMENT PRIMARY KEY,
    customer_id INT,
    direction ENUM('inbound', 'outbound') NOT NULL,
    content TEXT,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (customer_id) REFERENCES customers(id)
);

-- Twilio 和系统配置表
CREATE TABLE IF NOT EXISTS settings (
    key_name VARCHAR(50) PRIMARY KEY,
    key_value TEXT
);

-- 自动回复设置
CREATE TABLE IF NOT EXISTS auto_replies (
    id INT AUTO_INCREMENT PRIMARY KEY,
    keyword VARCHAR(255),
    response_text TEXT,
    is_active BOOLEAN DEFAULT TRUE
);