-- AI / manual catalog translations (EN, AR) for products and categories.
-- Source text stays on the entity; extra locales live here, one row per entity + locale.

DO $$ BEGIN
  CREATE TYPE translation_entity_type AS ENUM ('product', 'category');
EXCEPTION
  WHEN duplicate_object THEN NULL;
END $$;

DO $$ BEGIN
  CREATE TYPE translation_locale AS ENUM ('en', 'ar');
EXCEPTION
  WHEN duplicate_object THEN NULL;
END $$;

DO $$ BEGIN
  CREATE TYPE translation_status AS ENUM ('pending', 'ready', 'stale', 'failed');
EXCEPTION
  WHEN duplicate_object THEN NULL;
END $$;

CREATE TABLE IF NOT EXISTS entity_translations (
  id            BIGINT GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
  business_id   BIGINT NOT NULL,
  entity_type   translation_entity_type NOT NULL,
  entity_id     BIGINT NOT NULL,
  locale        translation_locale NOT NULL,
  fields        JSONB NOT NULL DEFAULT '{}'::jsonb,
  source_hash   VARCHAR(64) NOT NULL,
  status        translation_status NOT NULL DEFAULT 'pending',
  generated_by  VARCHAR(16) NOT NULL DEFAULT 'ai',
  created_at    TIMESTAMPTZ NOT NULL DEFAULT now(),
  updated_at    TIMESTAMPTZ NOT NULL DEFAULT now(),

  CONSTRAINT entity_translations_business_id_fkey
    FOREIGN KEY (business_id) REFERENCES businesses (id) ON DELETE CASCADE,
  CONSTRAINT entity_translations_entity_locale_unique
    UNIQUE (entity_type, entity_id, locale)
);

CREATE INDEX IF NOT EXISTS idx_entity_translations_business_id
  ON entity_translations (business_id);

CREATE INDEX IF NOT EXISTS idx_entity_translations_entity
  ON entity_translations (entity_type, entity_id);

DROP TRIGGER IF EXISTS entity_translations_set_updated_at ON entity_translations;
CREATE TRIGGER entity_translations_set_updated_at
  BEFORE UPDATE ON entity_translations
  FOR EACH ROW
  EXECUTE FUNCTION set_updated_at();