CREATE TABLE messages (
    id INT AUTO_INCREMENT PRIMARY KEY,
    username VARCHAR(50) NOT NULL,
    message TEXT NOT NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    signature TEXT,
    is_encrypted BOOLEAN DEFAULT FALSE,
    INDEX idx_created_at (created_at)
);

CREATE TABLE users (
    id INT AUTO_INCREMENT PRIMARY KEY,
    username VARCHAR(50) NOT NULL UNIQUE,
    password VARCHAR(255) NOT NULL,
    pgp_key TEXT,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    is_moderator TINYINT(1) NOT NULL DEFAULT 0,
    login_attempts INT NOT NULL DEFAULT 0,
    last_attempt TIMESTAMP NULL,
    is_blocked TINYINT(1) NOT NULL DEFAULT 0,
    block_reason TEXT,
    INDEX idx_username (username)
);

CREATE TABLE registrations (
    id INT AUTO_INCREMENT PRIMARY KEY,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    INDEX idx_created_at (created_at)
);

DELIMITER //
CREATE PROCEDURE migrate_if_needed()
BEGIN
    IF NOT EXISTS (SELECT * FROM information_schema.tables WHERE table_name = 'messages') THEN
        CREATE TABLE messages (
            id INT AUTO_INCREMENT PRIMARY KEY,
            username VARCHAR(50) NOT NULL,
            message TEXT NOT NULL,
            created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
            signature TEXT,
            is_encrypted BOOLEAN DEFAULT FALSE,
            INDEX idx_created_at (created_at)
        );
    END IF;

    IF NOT EXISTS (SELECT * FROM information_schema.tables WHERE table_name = 'users') THEN
        CREATE TABLE users (
            id INT AUTO_INCREMENT PRIMARY KEY,
            username VARCHAR(50) NOT NULL UNIQUE,
            password VARCHAR(255) NOT NULL,
            pgp_key TEXT,
            created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
            is_moderator TINYINT(1) NOT NULL DEFAULT 0,
            login_attempts INT NOT NULL DEFAULT 0,
            last_attempt TIMESTAMP NULL,
            is_blocked TINYINT(1) NOT NULL DEFAULT 0,
            block_reason TEXT,
            INDEX idx_username (username)
        );
    END IF;

    IF NOT EXISTS (SELECT * FROM information_schema.tables WHERE table_name = 'registrations') THEN
        CREATE TABLE registrations (
            id INT AUTO_INCREMENT PRIMARY KEY,
            created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
            INDEX idx_created_at (created_at)
        );
    END IF;

    IF EXISTS (
        SELECT * FROM information_schema.columns 
        WHERE table_name = 'registrations' AND column_name = 'ip'
    ) THEN
        DROP INDEX IF EXISTS idx_ip_created ON registrations;
        ALTER TABLE registrations DROP COLUMN ip;
    END IF;
END //
DELIMITER ;

CALL migrate_if_needed();
DROP PROCEDURE IF EXISTS migrate_if_needed;