-- Internationalization: locale-specific catalog text (canonical English stays in main tables).

CREATE TABLE IF NOT EXISTS entity_translations (
  id SERIAL PRIMARY KEY,
  entity_type VARCHAR(32) NOT NULL,
  entity_id INTEGER NOT NULL,
  locale VARCHAR(10) NOT NULL,
  field_name VARCHAR(64) NOT NULL,
  value TEXT NOT NULL,
  status VARCHAR(20) NOT NULL DEFAULT 'draft',
  source VARCHAR(120),
  updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
  UNIQUE (entity_type, entity_id, locale, field_name)
);

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

CREATE INDEX IF NOT EXISTS entity_translations_locale_field_idx
  ON entity_translations (locale, field_name);

CREATE INDEX IF NOT EXISTS entity_translations_value_lower_idx
  ON entity_translations (locale, lower(value));

CREATE OR REPLACE FUNCTION entity_translations_touch_updated_at()
RETURNS TRIGGER AS $$
BEGIN
  NEW.updated_at = now();
  RETURN NEW;
END;
$$ LANGUAGE plpgsql;

DROP TRIGGER IF EXISTS entity_translations_updated_at ON entity_translations;
CREATE TRIGGER entity_translations_updated_at
  BEFORE UPDATE ON entity_translations
  FOR EACH ROW EXECUTE PROCEDURE entity_translations_touch_updated_at();