(ns microtables-frontend.views
  (:require
   [re-frame.core :as re-frame]
   [microtables-frontend.subs :as subs]
   [microtables-frontend.events :as events]
   [microtables-frontend.utils :as utils]))


;; TABLE COMPONENTS

(defn cell [c r data]
  (let [datum (get-in data [c r])]
    ^{:key (str c r)} [:td
                       [:input {:id (str c r)
                                :value (if (= (get datum :view nil) :value)
                                         (get datum :value "")
                                         (get datum :error (get datum :display (get datum :value ""))));TODO: add "highlight" display mode (possibly just a css class)
                                :on-change #(re-frame/dispatch [::events/edit-cell-value c r (.. % -target -value)])
                                :on-focus #(re-frame/dispatch [::events/movement-enter-cell c r])
                                :on-blur #(re-frame/dispatch [::events/movement-leave-cell c r])
                                :on-keyPress #(when (= (.. % -which) 13)
                                                (re-frame/dispatch [::events/press-enter-in-cell c r]))}]]))

(defn row [r cols data]
  ^{:key (str "row-" r)} [:tr
                          (cons
                           ^{:key (str "row-head-" r)} [:th (str r)]
                           (map #(cell % r data) cols))])

(defn header-row [cols]
  ^{:key "header"} [:tr
                    (cons
                      ^{:key "corner"} [:th]
                      (map (fn [c] ^{:key (str "col-head-" c)} [:th c]) cols))])

(defn sheet [data]
  [:table [:tbody
           (let [maxrow (utils/highest-row data)
                 cols (take-while (partial not= (utils/next-letter (utils/highest-col data))) utils/col-letters)]
             (cons
               (header-row cols)
               (map #(row % cols data) (range 1 (inc maxrow)))))]])


(defn main-panel []
  (let [data (re-frame/subscribe [::subs/table-data])]
    [:div
     [:h1 "Microtables"]
     [sheet @data]]))