CREATE TABLE content_types (
    id INT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(64) NOT NULL,
    slug VARCHAR(64) NOT NULL UNIQUE,
    description TEXT NULL,
    created_at TIMESTAMP NULL,
    updated_at TIMESTAMP NULL
) ENGINE=InnoDB;

CREATE TABLE categories (
    id INT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
    content_type_id INT UNSIGNED NOT NULL,
    parent_id INT UNSIGNED NULL,

    name VARCHAR(128) NOT NULL,
    slug VARCHAR(128) NOT NULL,

    description TEXT NULL,
    image VARCHAR(255) NULL,

    is_active BOOLEAN DEFAULT TRUE,
    sort_order INT DEFAULT 0,

    created_at TIMESTAMP NULL,
    updated_at TIMESTAMP NULL,

    UNIQUE KEY uniq_category_slug (content_type_id, slug),
    FOREIGN KEY (content_type_id) REFERENCES content_types(id),
    FOREIGN KEY (parent_id) REFERENCES categories(id) ON DELETE CASCADE
) ENGINE=InnoDB;

CREATE TABLE category_seo (
    category_id INT UNSIGNED PRIMARY KEY,
    meta_title VARCHAR(255) NULL,
    meta_description VARCHAR(255) NULL,
    meta_keywords VARCHAR(255) NULL,
    canonical_url VARCHAR(255) NULL,

    FOREIGN KEY (category_id) REFERENCES categories(id) ON DELETE CASCADE
) ENGINE=InnoDB;

CREATE TABLE category_translations (
    id INT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
    category_id INT UNSIGNED NOT NULL,
    locale CHAR(2) NOT NULL,

    name VARCHAR(128) NOT NULL,
    description TEXT NULL,

    UNIQUE KEY uniq_translation (category_id, locale),
    FOREIGN KEY (category_id) REFERENCES categories(id) ON DELETE CASCADE
) ENGINE=InnoDB;

CREATE TABLE artwork_category (
    artwork_id INT UNSIGNED NOT NULL,
    category_id INT UNSIGNED NOT NULL,
    PRIMARY KEY (artwork_id, category_id),
    FOREIGN KEY (category_id) REFERENCES categories(id) ON DELETE CASCADE
) ENGINE=InnoDB;