(import-macros {: map} :lib.macro)

(local peg
 (if (pick-values 1 (pcall require :lpeg))
   (require :lpeg)
   (require :lpeglj)))
(local parser (require :parser.parser))
(local number (require :lib.number))
(local fetcher (require :fetcher))

(fn format-url [path page]
  (.. "https://chaekshop.ru/catalog/" path "?page=" page))

(local data-v-peg
  (* (peg.P "data-v-") (^ (+ parser.pegs.lat-letters parser.pegs.number) 1)))

(local product-peg
  (*
   (parser.anywhere
    (parser.tag :a {data-v-peg "" :href (peg.Cg (parser.till "\"") :url)
                    :class "*" :itemprop "url" :section_id "*"}))
   (parser.anywhere
    (parser.tag :img {:src (peg.Cg (parser.till "\"") :image)
                      :alt "*"
                      :title (peg.Cg (parser.till "\"") :title)
                      :loading "lazy"
                      data-v-peg ""}))
   (parser.anywhere
    (parser.tag :p {:itemprop "price" :class "*" data-v-peg ""}
     (* (peg.Cg (^ (+ parser.pegs.number " " ",") 1) :price) "₽")))
   (parser.anywhere
    (parser.tag :p {:class "*" data-v-peg ""}
     (+ (* (peg.Cg parser.pegs.number :weight) " грамм")
        (* parser.pegs.number " шт"))))))

(fn normalize [product]
  (local weight (or (number.string->number product.weight)
                    (parser.guess-weight product.title)))
  (local price (number.string->number (string.gsub product.price "," ".")))
  {:site "chaekshop"
   :title product.title
   :url (.. "https://chaekshop.ru" product.url)
   :description ""
   :image (.. "https://chaekshop.ru" product.image)
   :year (parser.guess-year product.title)
   :price price
   :weight weight
   :volume (parser.guess-volume product.title)
   :price-per (if (and price weight (< 0 weight))
                (/ (math.ceil (* (/ price weight) 10)) 10)
                nil)})

(fn products []
  (fetcher.from-html
    [{:path "chay/belyy_chay" :tags ["Белый чай"]}
     {:path "chay/guandunskie_uluny" :tags ["Улун"]}
     {:path "chay/zhyeltyy_chay" :tags ["Желтый чай"]}
     {:path "chay/zelyenyy_chay" :tags ["Зеленый чай"]}
     {:path "chay/krasnyy_chay" :tags ["Красный чай"]}
     {:path "chay/severo_futszyanskie_uluny" :tags ["Улун" "Фудзянь"]}
     {:path "chay/tayvanskie_uluny" :tags ["Улун" "Тайвань"]}
     {:path "chay/khey_cha" :tags ["Хэй ча"]}
     {:path "chay/shen_puer" :tags ["Шен пуэр"]}
     {:path "chay/shu_puery" :tags ["Шу пуэр"]}
     {:path "chay/yuzhno_futszyanskie_uluny_" :tags ["Улун"]}
     {:path "chay/yunnanskie_uluny" :tags ["Улун"]}
     {:path "chay/gaba_chay" :tags ["Улун"]}
     {:path "chay/na_kazhdyy_den"}
     {:path "chay/eksklyuziv"}
     {:path "posuda_i_aksessuary/pialy" :tags ["Посуда"]}
     {:path "posuda_i_aksessuary/isinskaya_glina" :tags ["Посуда"]}
     {:path "posuda_i_aksessuary/keramika_iz_tszindechzhen" :tags ["Посуда"]}
     {:path "posuda_i_aksessuary/keramika_iz_tszyanshuy" :tags ["Посуда"]}
     {:path "posuda_i_aksessuary/kolby_termosy_nabory" :tags ["Посуда"]}
     {:path "posuda_i_aksessuary/chabani" :tags ["Посуда"]}
     {:path "posuda_i_aksessuary/chaynye_figurki" :tags ["Посуда"]}
     {:path "posuda_i_aksessuary/slivniki" :tags ["Посуда"]}
     {:path "posuda_i_aksessuary/gayvani" :tags ["Посуда"]}
     {:path "posuda_i_aksessuary/keramika_iz_tsinchzhou" :tags ["Посуда"]}
     {:path "posuda_i_aksessuary/aksessuary"}
     {:path "posuda_i_aksessuary/pialy_tszindechzhen" :tags ["Посуда"]}
     {:path "posuda_i_aksessuary/keramika_dekhua" :tags ["Посуда"]}
     {:path "posuda_i_aksessuary/chayniki_iz_farfora" :tags ["Посуда"]}]
    format-url
    product-peg
    normalize))

{:products products :title "Чаёк" :url "https://chaekshop.ru"}