SET NAMES utf8mb4;

CREATE TABLE IF NOT EXISTS prompt_library (
    id INT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(120) NOT NULL,
    category VARCHAR(80) NOT NULL,
    description VARCHAR(255) NULL,
    prompt TEXT NOT NULL,
    is_active TINYINT(1) NOT NULL DEFAULT 1,
    created_by INT UNSIGNED NULL,
    updated_by INT UNSIGNED NULL,
    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
    updated_at DATETIME NULL,
    INDEX idx_prompt_library_category (category),
    INDEX idx_prompt_library_active (is_active),
    CONSTRAINT fk_prompt_library_created_by
        FOREIGN KEY (created_by) REFERENCES users (id) ON DELETE SET NULL,
    CONSTRAINT fk_prompt_library_updated_by
        FOREIGN KEY (updated_by) REFERENCES users (id) ON DELETE SET NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;