-- UTF-8, kein BOM
-- EIS – Schema-Update 1.1.1
-- Ziel: fehlende Tabellen anlegen, fehlende Spalten/Indizes ergänzen.

-- ==========================================================
-- 1) Einstellungen (neu in 1.1.1)
-- ==========================================================
CREATE TABLE IF NOT EXISTS `#__eis_settings` (
  `id` INT UNSIGNED NOT NULL AUTO_INCREMENT,
  `param` VARCHAR(191) NOT NULL,
  `value` TEXT NULL,
  `created` DATETIME NULL DEFAULT NULL,
  `modified` DATETIME NULL DEFAULT NULL,
  PRIMARY KEY (`id`),
  UNIQUE KEY `uniq_param` (`param`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

INSERT IGNORE INTO `#__eis_settings` (`param`, `value`, `created`, `modified`)
VALUES ('document_root', '', NOW(), NOW());

-- ==========================================================
-- 2) Dokumente (Bestand absichern)
--    Falls ältere Installationen die Tabelle nicht haben.
-- ==========================================================
CREATE TABLE IF NOT EXISTS `#__eis_documents` (
  `id` INT UNSIGNED NOT NULL AUTO_INCREMENT,
  `name` VARCHAR(255) NOT NULL,
  `path` TEXT NOT NULL,
  `parent_id` INT UNSIGNED DEFAULT NULL,
  `is_folder` TINYINT(1) NOT NULL DEFAULT 0,
  `title` VARCHAR(255) DEFAULT NULL,
  `description` TEXT DEFAULT NULL,
  `ordering` INT NOT NULL DEFAULT 0,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

-- Falls es Altbestände ohne neue Spalten gab, Spalten idempotent ergänzen
ALTER TABLE `#__eis_documents`
  ADD COLUMN IF NOT EXISTS `title` VARCHAR(255) DEFAULT NULL,
  ADD COLUMN IF NOT EXISTS `description` TEXT DEFAULT NULL,
  ADD COLUMN IF NOT EXISTS `ordering` INT NOT NULL DEFAULT 0,
  MODIFY COLUMN `is_folder` TINYINT(1) NOT NULL DEFAULT 0;

-- Nützliche Indizes (idempotent)
CREATE INDEX IF NOT EXISTS `idx_eis_docs_parent`   ON `#__eis_documents` (`parent_id`);
CREATE INDEX IF NOT EXISTS `idx_eis_docs_ordering` ON `#__eis_documents` (`ordering`);
CREATE INDEX IF NOT EXISTS `idx_eis_docs_name`     ON `#__eis_documents` (`name`);

-- Optional: Selbst-Referenz als FK (nur wenn du ON DELETE CASCADE willst)
-- Achtung: MySQL verlangt gleiche Kollation/Engine; Namen idempotent prüfen:
-- (MySQL kennt kein "ADD CONSTRAINT IF NOT EXISTS", daher defensiv erst droppen)
-- SET @fk_exists := (
--   SELECT COUNT(*)
--   FROM information_schema.REFERENTIAL_CONSTRAINTS
--   WHERE CONSTRAINT_SCHEMA = DATABASE()
--     AND CONSTRAINT_NAME = 'fk_eis_docs_parent'
-- );
-- SET @sql := IF(@fk_exists = 0,
--   'ALTER TABLE `#__eis_documents` ADD CONSTRAINT `fk_eis_docs_parent` FOREIGN KEY (`parent_id`) REFERENCES `#__eis_documents`(`id`) ON DELETE CASCADE;',
--   'SELECT 1');
-- PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;
