-- 001_initial_schema.sql

-- Users table for members and admins
CREATE TABLE IF NOT EXISTS `users` (
  `id` INT AUTO_INCREMENT PRIMARY KEY,
  `username` VARCHAR(255) NOT NULL UNIQUE,
  `email` VARCHAR(255) NOT NULL UNIQUE,
  `password_hash` VARCHAR(255) NOT NULL,
  `role` ENUM('member', 'admin', 'writer') NOT NULL DEFAULT 'member',
  `created_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

-- Writer applications table
CREATE TABLE IF NOT EXISTS `writer_applications` (
  `id` INT AUTO_INCREMENT PRIMARY KEY,
  `user_id` INT NOT NULL,
  `gov_id_path` VARCHAR(255) NOT NULL,
  `work_proof_path` VARCHAR(255) NOT NULL,
  `status` ENUM('pending', 'approved', 'rejected') NOT NULL DEFAULT 'pending',
  `requested_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  `reviewed_at` TIMESTAMP NULL DEFAULT NULL,
  FOREIGN KEY (`user_id`) REFERENCES `users`(`id`) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

-- Books table
CREATE TABLE IF NOT EXISTS `books` (
  `id` INT AUTO_INCREMENT PRIMARY KEY,
  `title` VARCHAR(255) NOT NULL,
  `author_name` VARCHAR(255) NOT NULL,
  `description` TEXT,
  `cover_image_url` VARCHAR(255),
  `google_books_id` VARCHAR(255) UNIQUE,
  `open_library_id` VARCHAR(255) UNIQUE,
  `added_by_user_id` INT,
  `created_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
   FOREIGN KEY (`added_by_user_id`) REFERENCES `users`(`id`) ON DELETE SET NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

-- User libraries table (connecting users and books)
CREATE TABLE IF NOT EXISTS `user_libraries` (
  `id` INT AUTO_INCREMENT PRIMARY KEY,
  `user_id` INT NOT NULL,
  `book_id` INT NOT NULL,
  `review` TEXT,
  `character_sketches` TEXT,
  `added_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  FOREIGN KEY (`user_id`) REFERENCES `users`(`id`) ON DELETE CASCADE,
  FOREIGN KEY (`book_id`) REFERENCES `books`(`id`) ON DELETE CASCADE,
  UNIQUE KEY `user_book_unique` (`user_id`, `book_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

-- Author followers table
CREATE TABLE IF NOT EXISTS `author_followers` (
  `id` INT AUTO_INCREMENT PRIMARY KEY,
  `follower_id` INT NOT NULL,
  `author_id` INT NOT NULL,
  `created_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  FOREIGN KEY (`follower_id`) REFERENCES `users`(`id`) ON DELETE CASCADE,
  FOREIGN KEY (`author_id`) REFERENCES `users`(`id`) ON DELETE CASCADE,
  UNIQUE KEY `follower_author_unique` (`follower_id`, `author_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

-- Library likes table
CREATE TABLE IF NOT EXISTS `library_likes` (
  `id` INT AUTO_INCREMENT PRIMARY KEY,
  `liker_id` INT NOT NULL,
  `library_owner_id` INT NOT NULL,
  `created_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  FOREIGN KEY (`liker_id`) REFERENCES `users`(`id`) ON DELETE CASCADE,
  FOREIGN KEY (`library_owner_id`) REFERENCES `users`(`id`) ON DELETE CASCADE,
  UNIQUE KEY `liker_owner_unique` (`liker_id`, `library_owner_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;