SET NAMES utf8mb4;

CREATE TABLE IF NOT EXISTS users (
  id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
  name VARCHAR(255) NOT NULL,
  email VARCHAR(255) NOT NULL UNIQUE,
  phone VARCHAR(30) NULL,
  locale VARCHAR(5) NOT NULL DEFAULT 'en',
  status VARCHAR(30) NOT NULL DEFAULT 'active',
  affiliate_code VARCHAR(24) NULL UNIQUE,
  preferences JSON NULL,
  two_factor_confirmed_at TIMESTAMP NULL,
  two_factor_secret TEXT NULL,
  last_login_at TIMESTAMP NULL,
  email_verified_at TIMESTAMP NULL,
  password VARCHAR(255) NOT NULL,
  remember_token VARCHAR(100) NULL,
  created_at TIMESTAMP NULL,
  updated_at TIMESTAMP NULL,
  INDEX users_status_index(status)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS password_reset_tokens (
  email VARCHAR(255) PRIMARY KEY,
  token VARCHAR(255) NOT NULL,
  created_at TIMESTAMP NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS roles (
  id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
  name VARCHAR(100) NOT NULL UNIQUE,
  label VARCHAR(150) NOT NULL,
  created_at TIMESTAMP NULL,
  updated_at TIMESTAMP NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS permissions (
  id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
  name VARCHAR(100) NOT NULL UNIQUE,
  label VARCHAR(150) NOT NULL,
  created_at TIMESTAMP NULL,
  updated_at TIMESTAMP NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS role_user (
  role_id BIGINT UNSIGNED NOT NULL,
  user_id BIGINT UNSIGNED NOT NULL,
  PRIMARY KEY(role_id,user_id),
  CONSTRAINT role_user_role_fk FOREIGN KEY(role_id) REFERENCES roles(id) ON DELETE CASCADE,
  CONSTRAINT role_user_user_fk FOREIGN KEY(user_id) REFERENCES users(id) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS permission_role (
  permission_id BIGINT UNSIGNED NOT NULL,
  role_id BIGINT UNSIGNED NOT NULL,
  PRIMARY KEY(permission_id,role_id),
  CONSTRAINT permission_role_permission_fk FOREIGN KEY(permission_id) REFERENCES permissions(id) ON DELETE CASCADE,
  CONSTRAINT permission_role_role_fk FOREIGN KEY(role_id) REFERENCES roles(id) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS pages (
  id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
  slug VARCHAR(190) NOT NULL UNIQUE,
  title JSON NOT NULL,
  excerpt JSON NULL,
  body_en LONGTEXT NULL,
  body_bn LONGTEXT NULL,
  seo JSON NULL,
  status VARCHAR(30) NOT NULL DEFAULT 'draft',
  author_id BIGINT UNSIGNED NULL,
  published_at TIMESTAMP NULL,
  created_at TIMESTAMP NULL,
  updated_at TIMESTAMP NULL,
  deleted_at TIMESTAMP NULL,
  INDEX pages_status_index(status),
  CONSTRAINT pages_author_fk FOREIGN KEY(author_id) REFERENCES users(id) ON DELETE SET NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS services (
  id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
  slug VARCHAR(190) NOT NULL UNIQUE,
  name JSON NOT NULL,
  summary JSON NOT NULL,
  icon VARCHAR(100) NOT NULL DEFAULT 'sparkles',
  status VARCHAR(30) NOT NULL DEFAULT 'coming_soon',
  url VARCHAR(255) NULL,
  sort_order INT UNSIGNED NOT NULL DEFAULT 0,
  featured TINYINT(1) NOT NULL DEFAULT 0,
  features JSON NULL,
  created_at TIMESTAMP NULL,
  updated_at TIMESTAMP NULL,
  deleted_at TIMESTAMP NULL,
  INDEX services_status_index(status)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS posts (
  id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
  type VARCHAR(50) NOT NULL DEFAULT 'news',
  slug VARCHAR(190) NOT NULL UNIQUE,
  title JSON NOT NULL,
  excerpt JSON NULL,
  body_en LONGTEXT NULL,
  body_bn LONGTEXT NULL,
  source_url VARCHAR(255) NULL UNIQUE,
  image VARCHAR(255) NULL,
  status VARCHAR(30) NOT NULL DEFAULT 'draft',
  featured TINYINT(1) NOT NULL DEFAULT 0,
  published_at TIMESTAMP NULL,
  created_at TIMESTAMP NULL,
  updated_at TIMESTAMP NULL,
  deleted_at TIMESTAMP NULL,
  INDEX posts_status_index(status),
  INDEX posts_published_index(published_at)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS partners (
  id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
  name JSON NOT NULL,
  category VARCHAR(100) NOT NULL,
  logo VARCHAR(255) NULL,
  url VARCHAR(255) NULL,
  active TINYINT(1) NOT NULL DEFAULT 1,
  sort_order INT UNSIGNED NOT NULL DEFAULT 0,
  created_at TIMESTAMP NULL,
  updated_at TIMESTAMP NULL,
  INDEX partners_category_index(category)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS testimonials (
  id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
  person_name VARCHAR(150) NOT NULL,
  designation JSON NULL,
  quote JSON NOT NULL,
  type VARCHAR(50) NOT NULL DEFAULT 'customer',
  avatar VARCHAR(255) NULL,
  active TINYINT(1) NOT NULL DEFAULT 1,
  created_at TIMESTAMP NULL,
  updated_at TIMESTAMP NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS faqs (
  id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
  category VARCHAR(100) NOT NULL DEFAULT 'general',
  question JSON NOT NULL,
  answer JSON NOT NULL,
  active TINYINT(1) NOT NULL DEFAULT 1,
  sort_order INT UNSIGNED NOT NULL DEFAULT 0,
  created_at TIMESTAMP NULL,
  updated_at TIMESTAMP NULL,
  INDEX faqs_category_index(category)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS settings (
  id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
  `key` VARCHAR(150) NOT NULL UNIQUE,
  value JSON NULL,
  is_public TINYINT(1) NOT NULL DEFAULT 0,
  created_at TIMESTAMP NULL,
  updated_at TIMESTAMP NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS subscribers (
  id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
  email VARCHAR(255) NOT NULL UNIQUE,
  locale VARCHAR(5) NOT NULL DEFAULT 'en',
  status VARCHAR(30) NOT NULL DEFAULT 'active',
  source VARCHAR(100) NULL,
  confirmed_at TIMESTAMP NULL,
  created_at TIMESTAMP NULL,
  updated_at TIMESTAMP NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS inquiries (
  id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
  user_id BIGINT UNSIGNED NULL,
  type VARCHAR(50) NOT NULL DEFAULT 'contact',
  name VARCHAR(150) NOT NULL,
  email VARCHAR(255) NOT NULL,
  phone VARCHAR(30) NULL,
  organization VARCHAR(190) NULL,
  subject VARCHAR(255) NOT NULL,
  message TEXT NOT NULL,
  status VARCHAR(30) NOT NULL DEFAULT 'new',
  assigned_to BIGINT UNSIGNED NULL,
  meta JSON NULL,
  created_at TIMESTAMP NULL,
  updated_at TIMESTAMP NULL,
  INDEX inquiries_type_index(type),
  INDEX inquiries_status_index(status),
  CONSTRAINT inquiries_user_fk FOREIGN KEY(user_id) REFERENCES users(id) ON DELETE SET NULL,
  CONSTRAINT inquiries_assignee_fk FOREIGN KEY(assigned_to) REFERENCES users(id) ON DELETE SET NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS vacancies (
  id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
  slug VARCHAR(190) NOT NULL UNIQUE,
  title JSON NOT NULL,
  summary JSON NOT NULL,
  description_en LONGTEXT NOT NULL,
  description_bn LONGTEXT NULL,
  department VARCHAR(100) NOT NULL,
  location VARCHAR(190) NOT NULL,
  employment_type VARCHAR(100) NOT NULL,
  status VARCHAR(30) NOT NULL DEFAULT 'draft',
  closes_at TIMESTAMP NULL,
  created_at TIMESTAMP NULL,
  updated_at TIMESTAMP NULL,
  deleted_at TIMESTAMP NULL,
  INDEX vacancies_department_index(department),
  INDEX vacancies_status_index(status)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS applications (
  id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
  vacancy_id BIGINT UNSIGNED NOT NULL,
  user_id BIGINT UNSIGNED NULL,
  name VARCHAR(150) NOT NULL,
  email VARCHAR(255) NOT NULL,
  phone VARCHAR(30) NOT NULL,
  resume_path VARCHAR(255) NOT NULL,
  cover_letter TEXT NULL,
  status VARCHAR(30) NOT NULL DEFAULT 'submitted',
  assigned_to BIGINT UNSIGNED NULL,
  internal_notes TEXT NULL,
  created_at TIMESTAMP NULL,
  updated_at TIMESTAMP NULL,
  UNIQUE KEY applications_vacancy_email_unique(vacancy_id,email),
  INDEX applications_status_index(status),
  CONSTRAINT applications_vacancy_fk FOREIGN KEY(vacancy_id) REFERENCES vacancies(id) ON DELETE CASCADE,
  CONSTRAINT applications_user_fk FOREIGN KEY(user_id) REFERENCES users(id) ON DELETE SET NULL,
  CONSTRAINT applications_assignee_fk FOREIGN KEY(assigned_to) REFERENCES users(id) ON DELETE SET NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS tickets (
  id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
  number VARCHAR(100) NOT NULL UNIQUE,
  user_id BIGINT UNSIGNED NOT NULL,
  subject VARCHAR(255) NOT NULL,
  category VARCHAR(100) NOT NULL DEFAULT 'general',
  priority VARCHAR(30) NOT NULL DEFAULT 'normal',
  status VARCHAR(30) NOT NULL DEFAULT 'open',
  assigned_to BIGINT UNSIGNED NULL,
  created_at TIMESTAMP NULL,
  updated_at TIMESTAMP NULL,
  INDEX tickets_status_index(status),
  CONSTRAINT tickets_user_fk FOREIGN KEY(user_id) REFERENCES users(id) ON DELETE CASCADE,
  CONSTRAINT tickets_assignee_fk FOREIGN KEY(assigned_to) REFERENCES users(id) ON DELETE SET NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS ticket_messages (
  id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
  ticket_id BIGINT UNSIGNED NOT NULL,
  user_id BIGINT UNSIGNED NOT NULL,
  message TEXT NOT NULL,
  internal TINYINT(1) NOT NULL DEFAULT 0,
  attachments JSON NULL,
  created_at TIMESTAMP NULL,
  updated_at TIMESTAMP NULL,
  CONSTRAINT ticket_messages_ticket_fk FOREIGN KEY(ticket_id) REFERENCES tickets(id) ON DELETE CASCADE,
  CONSTRAINT ticket_messages_user_fk FOREIGN KEY(user_id) REFERENCES users(id) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS campaigns (
  id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
  name VARCHAR(190) NOT NULL,
  slug VARCHAR(190) NOT NULL UNIQUE,
  description TEXT NULL,
  destination_url VARCHAR(255) NOT NULL,
  commission_type VARCHAR(30) NOT NULL DEFAULT 'fixed',
  commission_value DECIMAL(12,2) NOT NULL DEFAULT 0,
  currency VARCHAR(3) NOT NULL DEFAULT 'BDT',
  status VARCHAR(30) NOT NULL DEFAULT 'draft',
  starts_at DATETIME NULL,
  ends_at DATETIME NULL,
  version INT UNSIGNED NOT NULL DEFAULT 1,
  assets JSON NULL,
  created_at TIMESTAMP NULL,
  updated_at TIMESTAMP NULL,
  INDEX campaigns_status_index(status)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS referral_links (
  id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
  user_id BIGINT UNSIGNED NOT NULL,
  campaign_id BIGINT UNSIGNED NOT NULL,
  code VARCHAR(100) NOT NULL UNIQUE,
  utm_source VARCHAR(190) NULL,
  utm_medium VARCHAR(190) NULL,
  utm_campaign VARCHAR(190) NULL,
  click_count BIGINT UNSIGNED NOT NULL DEFAULT 0,
  active TINYINT(1) NOT NULL DEFAULT 1,
  created_at TIMESTAMP NULL,
  updated_at TIMESTAMP NULL,
  CONSTRAINT referral_links_user_fk FOREIGN KEY(user_id) REFERENCES users(id) ON DELETE CASCADE,
  CONSTRAINT referral_links_campaign_fk FOREIGN KEY(campaign_id) REFERENCES campaigns(id) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS referral_clicks (
  id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
  referral_link_id BIGINT UNSIGNED NOT NULL,
  visitor_id VARCHAR(36) NOT NULL,
  ip_hash VARCHAR(64) NULL,
  user_agent TEXT NULL,
  referer TEXT NULL,
  meta JSON NULL,
  clicked_at TIMESTAMP NOT NULL,
  INDEX referral_clicks_visitor_index(visitor_id),
  INDEX referral_clicks_clicked_index(clicked_at),
  CONSTRAINT referral_clicks_link_fk FOREIGN KEY(referral_link_id) REFERENCES referral_links(id) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS conversions (
  id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
  idempotency_key VARCHAR(36) NOT NULL UNIQUE,
  referral_link_id BIGINT UNSIGNED NOT NULL,
  external_reference VARCHAR(190) NULL,
  type VARCHAR(50) NOT NULL DEFAULT 'lead',
  value DECIMAL(12,2) NOT NULL DEFAULT 0,
  status VARCHAR(30) NOT NULL DEFAULT 'pending',
  meta JSON NULL,
  converted_at TIMESTAMP NOT NULL,
  created_at TIMESTAMP NULL,
  updated_at TIMESTAMP NULL,
  INDEX conversions_reference_index(external_reference),
  INDEX conversions_status_index(status),
  CONSTRAINT conversions_link_fk FOREIGN KEY(referral_link_id) REFERENCES referral_links(id) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS commissions (
  id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
  conversion_id BIGINT UNSIGNED NOT NULL UNIQUE,
  user_id BIGINT UNSIGNED NOT NULL,
  amount DECIMAL(12,2) NOT NULL,
  currency VARCHAR(3) NOT NULL DEFAULT 'BDT',
  rule_version INT UNSIGNED NOT NULL,
  status VARCHAR(30) NOT NULL DEFAULT 'pending',
  approved_by BIGINT UNSIGNED NULL,
  approved_at TIMESTAMP NULL,
  paid_at TIMESTAMP NULL,
  created_at TIMESTAMP NULL,
  updated_at TIMESTAMP NULL,
  INDEX commissions_status_index(status),
  CONSTRAINT commissions_conversion_fk FOREIGN KEY(conversion_id) REFERENCES conversions(id) ON DELETE CASCADE,
  CONSTRAINT commissions_user_fk FOREIGN KEY(user_id) REFERENCES users(id) ON DELETE CASCADE,
  CONSTRAINT commissions_approver_fk FOREIGN KEY(approved_by) REFERENCES users(id) ON DELETE SET NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS payout_requests (
  id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
  number VARCHAR(100) NOT NULL UNIQUE,
  user_id BIGINT UNSIGNED NOT NULL,
  amount DECIMAL(12,2) NOT NULL,
  currency VARCHAR(3) NOT NULL DEFAULT 'BDT',
  method VARCHAR(50) NOT NULL,
  destination_encrypted TEXT NOT NULL,
  status VARCHAR(30) NOT NULL DEFAULT 'requested',
  reviewed_by BIGINT UNSIGNED NULL,
  review_note TEXT NULL,
  settlement_reference VARCHAR(190) NULL,
  reviewed_at TIMESTAMP NULL,
  paid_at TIMESTAMP NULL,
  created_at TIMESTAMP NULL,
  updated_at TIMESTAMP NULL,
  INDEX payouts_status_index(status),
  CONSTRAINT payouts_user_fk FOREIGN KEY(user_id) REFERENCES users(id) ON DELETE CASCADE,
  CONSTRAINT payouts_reviewer_fk FOREIGN KEY(reviewed_by) REFERENCES users(id) ON DELETE SET NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS saved_services (
  user_id BIGINT UNSIGNED NOT NULL,
  service_id BIGINT UNSIGNED NOT NULL,
  created_at TIMESTAMP NULL,
  updated_at TIMESTAMP NULL,
  PRIMARY KEY(user_id,service_id),
  CONSTRAINT saved_services_user_fk FOREIGN KEY(user_id) REFERENCES users(id) ON DELETE CASCADE,
  CONSTRAINT saved_services_service_fk FOREIGN KEY(service_id) REFERENCES services(id) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS audit_logs (
  id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
  user_id BIGINT UNSIGNED NULL,
  action VARCHAR(190) NOT NULL,
  auditable_type VARCHAR(190) NULL,
  auditable_id BIGINT UNSIGNED NULL,
  `before` JSON NULL,
  `after` JSON NULL,
  ip_address VARCHAR(45) NULL,
  user_agent TEXT NULL,
  correlation_id VARCHAR(36) NULL,
  created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
  INDEX audit_action_index(action),
  INDEX audit_target_index(auditable_type,auditable_id),
  INDEX audit_correlation_index(correlation_id),
  CONSTRAINT audit_user_fk FOREIGN KEY(user_id) REFERENCES users(id) ON DELETE SET NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS personal_access_tokens (
  id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
  tokenable_type VARCHAR(190) NOT NULL,
  tokenable_id BIGINT UNSIGNED NOT NULL,
  name VARCHAR(190) NOT NULL,
  token VARCHAR(64) NOT NULL UNIQUE,
  abilities TEXT NULL,
  last_used_at TIMESTAMP NULL,
  expires_at TIMESTAMP NULL,
  created_at TIMESTAMP NULL,
  updated_at TIMESTAMP NULL,
  INDEX access_token_owner_index(tokenable_type,tokenable_id),
  INDEX access_token_expires_index(expires_at)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS notifications (
  id VARCHAR(36) PRIMARY KEY,
  type VARCHAR(190) NOT NULL,
  notifiable_type VARCHAR(190) NOT NULL,
  notifiable_id BIGINT UNSIGNED NOT NULL,
  data TEXT NOT NULL,
  read_at TIMESTAMP NULL,
  created_at TIMESTAMP NULL,
  updated_at TIMESTAMP NULL,
  INDEX notifications_owner_index(notifiable_type,notifiable_id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;