CREATE TABLE IF NOT EXISTS tenants (
  id INT AUTO_INCREMENT PRIMARY KEY,
  slug VARCHAR(100) NOT NULL,
  name VARCHAR(255) NOT NULL,
  status VARCHAR(30) NOT NULL DEFAULT 'active',
  timezone VARCHAR(100) NOT NULL DEFAULT 'Europe/Berlin',
  locale VARCHAR(20) NOT NULL DEFAULT 'de-DE',
  currency_code CHAR(3) NOT NULL DEFAULT 'EUR',
  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  UNIQUE KEY uq_tenants_slug (slug),
  KEY idx_tenants_status (status)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS tenant_settings (
  tenant_id INT PRIMARY KEY,
  mark_price_cents INT NOT NULL DEFAULT 20,
  self_entry_enabled TINYINT(1) NOT NULL DEFAULT 1,
  paypal_enabled TINYINT(1) NOT NULL DEFAULT 0,
  paypal_url_template VARCHAR(1000) NOT NULL DEFAULT '',
  sheet_window_days INT NOT NULL DEFAULT 100,
  negative_warning_cents INT NOT NULL DEFAULT -1000,
  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  CONSTRAINT fk_tenant_settings_tenant
    FOREIGN KEY (tenant_id) REFERENCES tenants(id)
    ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS users (
  id INT AUTO_INCREMENT PRIMARY KEY,
  email VARCHAR(255) NOT NULL,
  email_norm VARCHAR(255) NOT NULL,
  display_name VARCHAR(255) NOT NULL,
  password_hash VARCHAR(255) NULL,
  status VARCHAR(30) NOT NULL DEFAULT 'active',
  last_login_at DATETIME NULL,
  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  UNIQUE KEY uq_users_email_norm (email_norm),
  KEY idx_users_status (status)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS tenant_memberships (
  id INT AUTO_INCREMENT PRIMARY KEY,
  tenant_id INT NOT NULL,
  user_id INT NOT NULL,
  role VARCHAR(30) NOT NULL DEFAULT 'member',
  status VARCHAR(30) NOT NULL DEFAULT 'active',
  invited_at DATETIME NULL,
  joined_at DATETIME NULL,
  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  UNIQUE KEY uq_tenant_memberships_tenant_user (tenant_id, user_id),
  KEY idx_tenant_memberships_user (user_id),
  KEY idx_tenant_memberships_tenant_role_status (tenant_id, role, status),
  CONSTRAINT fk_tenant_memberships_tenant
    FOREIGN KEY (tenant_id) REFERENCES tenants(id)
    ON DELETE CASCADE,
  CONSTRAINT fk_tenant_memberships_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 participants (
  id INT AUTO_INCREMENT PRIMARY KEY,
  tenant_id INT NOT NULL,
  user_id INT NULL,
  display_name VARCHAR(255) NOT NULL,
  email VARCHAR(255) NULL,
  email_norm VARCHAR(255) NULL,
  paypal_name VARCHAR(255) NULL,
  active TINYINT(1) NOT NULL DEFAULT 1,
  legacy_mitarbeiter_id INT NULL,
  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  UNIQUE KEY uq_participants_tenant_legacy (tenant_id, legacy_mitarbeiter_id),
  UNIQUE KEY uq_participants_tenant_email_norm (tenant_id, email_norm),
  KEY idx_participants_tenant_active_name (tenant_id, active, display_name),
  KEY idx_participants_user (user_id),
  CONSTRAINT fk_participants_tenant
    FOREIGN KEY (tenant_id) REFERENCES tenants(id)
    ON DELETE CASCADE,
  CONSTRAINT fk_participants_user
    FOREIGN KEY (user_id) REFERENCES users(id)
    ON DELETE SET NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;