-- Store loan / installment methods (اقساط و تسهیلات)

CREATE TABLE IF NOT EXISTS store_loan_methods (
  id BIGSERIAL PRIMARY KEY,
  business_id BIGINT NOT NULL REFERENCES businesses (id) ON DELETE CASCADE ON UPDATE NO ACTION,
  name VARCHAR(255) NOT NULL,
  name_en VARCHAR(255) NOT NULL,
  description TEXT NULL,
  image_media_id BIGINT NULL REFERENCES media (id) ON UPDATE NO ACTION,
  image_aspect_ratio VARCHAR(10) NOT NULL DEFAULT '1:1',
  min_shopping_amount NUMERIC(12, 2) NOT NULL,
  min_amount NUMERIC(12, 2) NOT NULL,
  max_amount NUMERIC(12, 2) NOT NULL,
  interest NUMERIC(8, 4) NOT NULL,
  return_months_min INT NOT NULL,
  return_months_max INT NOT NULL,
  return_months_step INT NOT NULL DEFAULT 3,
  sort_order INT NOT NULL DEFAULT 0,
  is_active BOOLEAN NOT NULL DEFAULT TRUE,
  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_store_loan_methods_business_id
  ON store_loan_methods (business_id);

CREATE INDEX IF NOT EXISTS idx_store_loan_methods_image_media_id
  ON store_loan_methods (image_media_id);

CREATE INDEX IF NOT EXISTS idx_store_loan_methods_business_sort_order
  ON store_loan_methods (business_id, sort_order);

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