ALTER TABLE tenants
  ADD COLUMN customer_type VARCHAR(20) NOT NULL DEFAULT 'unknown' AFTER name,
  ADD KEY idx_tenants_customer_type (customer_type);

ALTER TABLE rate_limit_attempts
  ADD KEY idx_rate_limit_attempts_created (created_at);

ALTER TABLE audit_log
  ADD KEY idx_audit_log_created (created_at);

ALTER TABLE outbound_emails
  ADD KEY idx_outbound_emails_created (created_at);

CREATE TABLE legal_acceptances (
  id BIGINT AUTO_INCREMENT PRIMARY KEY,
  tenant_id INT NULL,
  user_id INT NULL,
  document_type VARCHAR(40) NOT NULL,
  document_version VARCHAR(20) NOT NULL,
  context VARCHAR(60) NOT NULL,
  ip VARCHAR(45) NULL,
  user_agent VARCHAR(500) NULL,
  metadata_json TEXT NULL,
  accepted_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  KEY idx_legal_acceptances_tenant (tenant_id, accepted_at),
  KEY idx_legal_acceptances_user (user_id, accepted_at),
  CONSTRAINT fk_legal_acceptances_tenant
    FOREIGN KEY (tenant_id) REFERENCES tenants(id)
    ON DELETE SET NULL,
  CONSTRAINT fk_legal_acceptances_user
    FOREIGN KEY (user_id) REFERENCES users(id)
    ON DELETE SET NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE legal_requests (
  id BIGINT AUTO_INCREMENT PRIMARY KEY,
  reference_code VARCHAR(40) NOT NULL,
  access_token_hash CHAR(64) NOT NULL,
  request_type VARCHAR(30) NOT NULL,
  tenant_id INT NULL,
  user_id INT NULL,
  requester_name VARCHAR(255) NOT NULL,
  requester_email VARCHAR(255) NOT NULL,
  contract_reference VARCHAR(255) NOT NULL,
  request_reason TEXT NULL,
  requested_end VARCHAR(40) NULL,
  status VARCHAR(30) NOT NULL DEFAULT 'received',
  ip VARCHAR(45) NULL,
  user_agent VARCHAR(500) NULL,
  metadata_json TEXT NULL,
  received_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  processed_at DATETIME NULL,
  UNIQUE KEY uq_legal_requests_reference (reference_code),
  UNIQUE KEY uq_legal_requests_access_token (access_token_hash),
  KEY idx_legal_requests_tenant (tenant_id, received_at),
  KEY idx_legal_requests_type_status (request_type, status, received_at),
  CONSTRAINT fk_legal_requests_tenant
    FOREIGN KEY (tenant_id) REFERENCES tenants(id)
    ON DELETE SET NULL,
  CONSTRAINT fk_legal_requests_user
    FOREIGN KEY (user_id) REFERENCES users(id)
    ON DELETE SET NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;