// Shared item SELECT shapes for the public and admin routes.
//
// Images and tags are pulled as scalar subqueries rather than LEFT JOIN +
// GROUP BY. Joining two one-to-many relations in the same query multiplies
// their rows together — an item with 2 images and 3 tags would aggregate 6
// rows, silently repeating every image three times. Subqueries keep each
// aggregate independent and drop the GROUP BY entirely.

const IMAGES_SUBQUERY = `
  COALESCE((
    SELECT json_agg(json_build_object('id', img.id, 'image_path', img.image_path, 'sort_order', img.sort_order)
                    ORDER BY img.sort_order)
    FROM item_images img
    WHERE img.item_id = i.id
  ), '[]') AS images`;

const TAGS_SUBQUERY = `
  COALESCE((
    SELECT json_agg(json_build_object('id', t.id, 'name', t.name, 'color', t.color) ORDER BY t.name)
    FROM item_tags it
    JOIN tags t ON t.id = it.tag_id
    WHERE it.item_id = i.id
  ), '[]') AS tags`;

const FROM_CLAUSE = `
  FROM items i
  LEFT JOIN categories c ON c.id = i.category_id`;

// The storefront gets an explicit column list — it has no business seeing
// paypal_order_id or reserved_until.
export const PUBLIC_ITEM_SELECT = `
  SELECT i.id, i.name, i.description, i.price_cents, i.status, i.created_at, i.category_id,
    c.name AS category_name,
    ${IMAGES_SUBQUERY},
    ${TAGS_SUBQUERY}
  ${FROM_CLAUSE}`;

export const ADMIN_ITEM_SELECT = `
  SELECT i.*,
    c.name AS category_name,
    ${IMAGES_SUBQUERY},
    ${TAGS_SUBQUERY}
  ${FROM_CLAUSE}`;