-- One-Time File Share — database schema
-- Run this once against your MySQL database, e.g.:
--   mysql -u root -p < schema.sql
-- No auto-migration happens at app startup.
--
-- This creates the database and selects it. If you already created the database
-- yourself (and your DB_NAME differs from `fileshare`), delete the two lines below
-- and instead pick the database first (in MySQL Workbench: double-click it in the
-- SCHEMAS sidebar, or run `USE your_db_name;`).

CREATE DATABASE IF NOT EXISTS fileshare CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
USE fileshare;

SET NAMES utf8mb4;

CREATE TABLE IF NOT EXISTS users (
  id             BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
  username       VARCHAR(64)  NOT NULL,
  email          VARCHAR(255) NOT NULL,
  password_hash  VARCHAR(255) NOT NULL,
  email_verified TINYINT(1)   NOT NULL DEFAULT 0,
  is_admin       TINYINT(1)   NOT NULL DEFAULT 0,
  disabled       TINYINT(1)   NOT NULL DEFAULT 0,
  verify_token   CHAR(64)     NULL,
  verify_sent_at DATETIME     NULL,
  created_at     DATETIME     NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (id),
  UNIQUE KEY uq_users_username (username),
  UNIQUE KEY uq_users_email (email),
  KEY idx_users_verify_token (verify_token)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS files (
  id            BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
  user_id       BIGINT UNSIGNED NOT NULL,
  original_name VARCHAR(512) NOT NULL,
  stored_name   CHAR(36)     NOT NULL,
  ext           VARCHAR(32)  NULL,
  mime          VARCHAR(255) NULL,
  size_bytes    BIGINT UNSIGNED NOT NULL DEFAULT 0,
  is_bundle     TINYINT(1)   NOT NULL DEFAULT 0,
  compressed    TINYINT(1)   NOT NULL DEFAULT 0,
  compressing   TINYINT(1)   NOT NULL DEFAULT 0,
  av_status     ENUM('pending','clean','infected','skipped') NOT NULL DEFAULT 'pending',
  created_at    DATETIME     NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (id),
  UNIQUE KEY uq_files_stored_name (stored_name),
  KEY idx_files_user (user_id),
  CONSTRAINT fk_files_user FOREIGN KEY (user_id) REFERENCES users (id) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS download_links (
  id         BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
  file_id    BIGINT UNSIGNED NOT NULL,
  token      CHAR(43)     NOT NULL,
  used       TINYINT(1)   NOT NULL DEFAULT 0,
  used_at    DATETIME     NULL,
  expires_at DATETIME     NOT NULL,
  created_at DATETIME     NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (id),
  UNIQUE KEY uq_links_token (token),
  KEY idx_links_file (file_id),
  CONSTRAINT fk_links_file FOREIGN KEY (file_id) REFERENCES files (id) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

-- Session store table required by express-mysql-session.
CREATE TABLE IF NOT EXISTS sessions (
  session_id VARCHAR(128) COLLATE utf8mb4_bin NOT NULL,
  expires    INT UNSIGNED NOT NULL,
  data       MEDIUMTEXT COLLATE utf8mb4_bin,
  PRIMARY KEY (session_id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin;