(import-macros {:compile-html HTML} :macros)
(local lib (require :lib))
(local shop (require :shop))
(local dicts (require :dicts))
(local templates (require :templates))

(fn all-products [db filters authenticated?]
  (local where-stmts [])
  (local where-args [])
  (var has-search-query? false)

  (when (not authenticated?)
    (table.insert where-stmts "products.published = true"))

  (when filters.type
    (table.insert where-stmts "products.type = ?")
    (table.insert where-args filters.type))

  (when filters.search
    (table.insert where-stmts "products_search MATCH ?")
    (table.insert where-args filters.search)
    (set has-search-query? true))

  (local where
    (if (< 0 (# where-stmts))
      (.. "WHERE " (table.concat where-stmts " AND\n"))
      ""))

  (local from-sql
    (if has-search-query?
      "products_search INNER JOIN products ON products_search.name = products.name"
      "products"))

  (_G.must
    (luna.db.query-assoc db
      (..
        "SELECT products.name,
                products.title,
                products.published,
                products.short_description as \"short-description\",
                products.price_per AS \"price-per\",
                products.volume,
                products.stock,
                products.packaging,
                products.type,
                products.region,
                products.image1,
                products.image2,
                products.image3,
                products.image4,
                products.image5
        FROM " from-sql " "
        where
        " ORDER BY products.position ASC,
                   products.creation_time DESC"
                   (if has-search-query? ", rank" ""))
      where-args)))

(fn item-template [product basket]
  (local item-url (.. "/shop/" product.name))
  (local images [])
  (for [i 2 5]
    (table.insert images (. product (.. "image" i))))

  (HTML
   [:section {:class (.. "shop-item"
                         (if (not product.published)
                             " shop-item-not-published" ""))}
    [:a {:href item-url}
     [:div {:class "shop-item-imgs"}
      [:img {:class "shop-item-img"
             :src (.. "/static/files/" (. product.image1) "-thumbnail.jpg")}]
      (table.concat
        (let [without-videos
               (icollect [_ v (ipairs images)]
                 (if (lib.ends-with? (_G.must (luna.utf8.lower v)) ".webm")
                   nil
                   v))]
          (icollect [idx image (ipairs without-videos)]
            (HTML
              [:img {:class "shop-item-img" :src (.. "/static/files/" image "-thumbnail.jpg")
                     :loading "lazy"
                     :style (.. "z-index: " (+ idx 2) ";"
                                "width: calc(100% / " (# without-videos) ");"
                                "left: calc(100% / " (# without-videos) " * " (- idx 1) ")")}]))))]]
    [:a {:href item-url}
      [:h3 {:class "shop-item-title"} product.title]]
    [:div {:class "shop-item-price"}
     (templates.add-to-basket-form product basket "" "/shop")]
    (templates.product-overview product "mb-0-25 font-size-0-875")
    [:div {} product.short-description]]))

(fn content [db products filters basket authenticated?]
  [(HTML
    [:aside {}
     (templates.header "/shop" authenticated?)
     (if (< 0 (# basket)) (templates.basket basket "/shop") "")
     [:section {}
       [:h2 {} "Условия"]
       [:p {} ""]]])
   (HTML
    [:div {:class "content"}
     [:div {:class "back"} [:a {:href "/"} "⟵ Обратно на главную"]]
     [:h2 {:class "product-page-title"} "Магазин"]
     (if authenticated?
       (HTML
        [:div {:class "mb-1" :style "margin-top: -0.5rem"}
          [:a {:style "white-space: nowrap"
               :href (.. "/shop/add")} "+ Добавить"]
          [:a {:style "white-space: nowrap; margin-left: 1rem;"
               :href (.. "/shop/order/list")} "☰ Список заказов"]])
       "")
      [:form {:class "d-flex gap-0-5 mb-1"}
       [:input {:name "search" :type "search"
                :placeholder "Поиск" :value (or filters.search "")}]
       [:select {:name "type"}
         [:option {:value ""} "Все товары"]
         (table.concat
           (icollect [_ v (ipairs dicts.product-type)]
             (HTML [:option (fn [] {:value v.value
                                    :selected (= filters.type v.value)})
                     v.label])))]
       [:button {:type "submit"} "Применить"]]
      [:div {:class "shop-items"}
       (if (< 0 (# products))
         (table.concat
           (icollect [_ v (ipairs products)]
             (item-template v basket)))
         (HTML [:em {} "Пока что здесь ничего нет!"]))]])])

(fn render [request db authenticated?]
  (let [order-id (shop.order-id request)
        basket (if order-id (shop.basket db order-id) [])
        type (if (and request.query.type
                      (not (lib.empty? (. request.query.type 1))))
               (. request.query.type 1)
               nil)
        search (if (and request.query.search
                        (not (lib.empty? (. request.query.search 1))))
                 (. request.query.search 1)
                 nil)
        filters { : type : search }
        products (all-products db filters authenticated?)]
    (values 200 {} (templates.base
                     (content db products filters basket authenticated?)))))

{: render}