# database.py
import mysql.connector
from mysql.connector import Error
from config import Config


def create_database():
    """创建数据库（如果不存在）"""
    try:
        # 连接到MySQL服务器（不带数据库名）
        conn = mysql.connector.connect(
            host=Config.DB_CONFIG['host'],
            user=Config.DB_CONFIG['user'],
            password=Config.DB_CONFIG['password']
        )

        cursor = conn.cursor()

        # 创建数据库
        cursor.execute(f"CREATE DATABASE IF NOT EXISTS {Config.DB_CONFIG['database']}")
        print(f"数据库 {Config.DB_CONFIG['database']} 已创建或已存在")

        # 切换到新数据库
        cursor.execute(f"USE {Config.DB_CONFIG['database']}")

        # 创建表
        sql_scripts = [
            """
            CREATE TABLE IF NOT EXISTS users (
                id INT AUTO_INCREMENT PRIMARY KEY,
                username VARCHAR(50) UNIQUE NOT NULL,
                password_hash VARCHAR(128) NOT NULL,
                email VARCHAR(100),
                is_admin BOOLEAN DEFAULT FALSE,
                is_active tinyint(1) DEFAULT '1',
                created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
            )
            """,
            """
            CREATE TABLE IF NOT EXISTS certificate_authorities (
                id INT AUTO_INCREMENT PRIMARY KEY,
                name VARCHAR(100) NOT NULL,
                common_name VARCHAR(100) NOT NULL,
                organization VARCHAR(100),
                organizational_unit VARCHAR(100),
                country VARCHAR(2),
                state VARCHAR(100),
                locality VARCHAR(100),
                key_size INT DEFAULT 2048,
                days_valid INT DEFAULT 3650,
                cert_path VARCHAR(255),
                key_path VARCHAR(255),
                created_by INT,
                created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
                FOREIGN KEY (created_by) REFERENCES users(id)
            )
            """,
            """
            CREATE TABLE IF NOT EXISTS certificates (
                id INT AUTO_INCREMENT PRIMARY KEY,
                common_name VARCHAR(100) NOT NULL,
                san_dns TEXT,
                san_ip TEXT,
                organization VARCHAR(100),
                organizational_unit VARCHAR(100),
                country VARCHAR(2),
                state VARCHAR(100),
                locality VARCHAR(100),
                key_size INT DEFAULT 2048,
                days_valid INT DEFAULT 365,
                cert_path VARCHAR(255),
                key_path VARCHAR(255),
                csr_path VARCHAR(255),
                ca_id INT,
                status ENUM('active', 'revoked', 'expired') DEFAULT 'active',
                created_by INT,
                created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
                expires_at TIMESTAMP NULL,
                revoked_at TIMESTAMP NULL,
                revocation_reason VARCHAR(255),
                FOREIGN KEY (ca_id) REFERENCES certificate_authorities(id),
                FOREIGN KEY (created_by) REFERENCES users(id)
            )
            """,
            """
            CREATE TABLE IF NOT EXISTS certificate_revocation_list (
                id INT AUTO_INCREMENT PRIMARY KEY,
                ca_id INT NOT NULL,
                crl_path VARCHAR(255),
                last_updated TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
                next_update TIMESTAMP NULL,
                FOREIGN KEY (ca_id) REFERENCES certificate_authorities(id)
            )
            """,
            """
            CREATE TABLE IF NOT EXISTS captcha (
                id INT AUTO_INCREMENT PRIMARY KEY,
                code VARCHAR(10) NOT NULL,
                created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
            )
            """
        ]

        for script in sql_scripts:
            cursor.execute(script)

        conn.commit()
        print("所有表已创建或已存在")

    except Error as e:
        print(f"数据库初始化错误: {e}")
        raise
    finally:
        if conn.is_connected():
            cursor.close()
            conn.close()


def create_admin_user():
    """创建初始管理员用户"""
    from werkzeug.security import generate_password_hash

    try:
        conn = mysql.connector.connect(**Config.DB_CONFIG)
        cursor = conn.cursor(dictionary=True)

        # 检查管理员是否已存在
        cursor.execute("SELECT id FROM users WHERE username = %s", (Config.ADMIN_USERNAME,))
        if cursor.fetchone():
            print("管理员用户已存在")
            return

        # 创建管理员
        password_hash = generate_password_hash(Config.ADMIN_PASSWORD)
        cursor.execute("""
            INSERT INTO users (username, password_hash, email, is_admin, is_active)
            VALUES (%s, %s, %s, %s, %s)
        """, (Config.ADMIN_USERNAME, password_hash, Config.ADMIN_EMAIL, True, True))

        conn.commit()
        print("管理员用户创建成功")

    except Error as e:
        print(f"创建管理员用户错误: {e}")
        raise
    finally:
        if conn.is_connected():
            cursor.close()
            conn.close()


def initialize_database():
    """初始化数据库"""
    create_database()
    create_admin_user()