-- Migracja: Tabela settings + kolumny Google Ads w clients
-- Data: 2026-02-15
-- Opis: Idempotentna migracja (bez bledow i bez duplikatow przy ponownym uruchomieniu)

-- 1. Tabela settings (globalne ustawienia aplikacji)
CREATE TABLE IF NOT EXISTS `settings` (
  `id` INT(11) NOT NULL AUTO_INCREMENT,
  `setting_key` VARCHAR(100) NOT NULL,
  `setting_value` TEXT NULL,
  PRIMARY KEY (`id`),
  UNIQUE KEY `uk_setting_key` (`setting_key`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

-- 2. Kolumna google_ads_customer_id w tabeli clients (tylko jesli nie istnieje)
SET @sql = IF(
  EXISTS (
    SELECT 1
    FROM INFORMATION_SCHEMA.COLUMNS
    WHERE TABLE_SCHEMA = DATABASE()
      AND TABLE_NAME = 'clients'
      AND COLUMN_NAME = 'google_ads_customer_id'
  ),
  'DO 1',
  'ALTER TABLE `clients` ADD COLUMN `google_ads_customer_id` VARCHAR(20) NULL DEFAULT NULL AFTER `name`'
);
PREPARE stmt FROM @sql;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;

-- 3. Kolumna google_ads_start_date w tabeli clients (tylko jesli nie istnieje)
SET @sql = IF(
  EXISTS (
    SELECT 1
    FROM INFORMATION_SCHEMA.COLUMNS
    WHERE TABLE_SCHEMA = DATABASE()
      AND TABLE_NAME = 'clients'
      AND COLUMN_NAME = 'google_ads_start_date'
  ),
  'DO 1',
  'ALTER TABLE `clients` ADD COLUMN `google_ads_start_date` DATE NULL DEFAULT NULL AFTER `google_ads_customer_id`'
);
PREPARE stmt FROM @sql;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;