(ns uxbox.ui.workspace.workarea
  (:require [sablono.core :as html :refer-macros [html]]
            [rum.core :as rum]
            [uxbox.router :as r]
            [uxbox.rstore :as rs]
            [uxbox.state :as s]
            [uxbox.shapes :as shapes]
            [uxbox.library.icons :as _icons]
            [uxbox.ui.mixins :as mx]
            [uxbox.ui.util :as util]
            [uxbox.data.projects :as dp]
            [uxbox.ui.workspace.canvas :as wc]
            [uxbox.ui.workspace.base :as wb]
            [uxbox.ui.workspace.rules :as wr]
            [uxbox.ui.workspace.toolboxes :as toolboxes]))

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;; Coordinates Debug
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(defn- coordenates-render
  [own]
  (let [[x y] (rum/react wb/mouse-position)]
    (html
     [:div {:style {:position "absolute" :left "80px" :top "20px"}}
      [:table
       [:tbody
        [:tr [:td "X:"] [:td x]]
        [:tr [:td "Y:"] [:td y]]]]])))

(def coordinates
  (util/component
   {:render coordenates-render
    :name "coordenates"
    :mixins [rum/reactive]}))

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;; Grid
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(def ^:static grid-color "#cccccc")

(defn grid-render
  [own enabled? zoom]
  (letfn [(vertical-line [position value padding]
            (let [ticks-mod (/ 100 zoom)
                  step-size (/ 10 zoom)]
              (if (< (mod value ticks-mod) step-size)
                (html [:line {:key position
                              :y1 padding
                              :y2 wb/viewport-width
                              :x1 position
                              :x2 position
                              :stroke grid-color
                              :stroke-width (/ 0.5 zoom)
                              :opacity 0.75}])
                (html [:line {:key position
                              :y1 padding
                              :y2 wb/viewport-width
                              :x1 position
                              :x2 position
                              :stroke grid-color
                              :stroke-width (/ 0.5 zoom)
                              :opacity 0.25}]))))
          (horizontal-line [position value padding]
            (let [ticks-mod (/ 100 zoom)
                  step-size (/ 10 zoom)]
              (if (< (mod value ticks-mod) step-size)
                (html [:line {:key position
                              :y1 position
                              :y2 position
                              :x1 padding
                              :x2 wb/viewport-height
                              :stroke grid-color
                              :stroke-width (/ 0.5 zoom)
                              :opacity 0.75}])
                (html [:line {:key position
                              :y1 position
                              :y2 position
                              :x1 padding
                              :x2 wb/viewport-height
                              :stroke grid-color
                              :stroke-width (/ 0.5 zoom)
                              :opacity 0.25}]))))]
    (let [padding (* 20 zoom)
          ticks-mod (/ 100 zoom)
          step-size (/ 10 zoom)
          vertical-ticks (range (- padding wb/document-start-y)
                                (- wb/viewport-height wb/document-start-y padding)
                                step-size)
          horizontal-ticks (range (- padding wb/document-start-x)
                                  (- wb/viewport-width wb/document-start-x padding)
                                  step-size)]
      (html
       [:g.grid
        {:style {:display (if enabled? "block" "none")}}
        (for [tick vertical-ticks]
          (let [position (+ tick wb/document-start-x)
                line (vertical-line position tick padding)]
            (rum/with-key line (str "tick-" tick))))
        (for [tick horizontal-ticks]
          (let [position (+ tick wb/document-start-y)
                line (horizontal-line position tick padding)]
            (rum/with-key line (str "tick-" tick))))]))))

(def grid
  (util/component
   {:render grid-render
    :name "grid"
    :mixins [mx/static]}))

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;; Viewport
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

(defn viewport-render
  []
  (let [workspace (rum/react wb/workspace-state)
        zoom 1]
    (html
     [:svg#viewport
      {:width wb/viewport-height
       :height wb/viewport-width}
      [:g.zoom
       {:transform (str "scale(" zoom ", " zoom ")")}
       (wc/canvas)
       (grid (:grid-enabled workspace false) zoom)]])))

(def viewport
  (util/component
   {:render viewport-render
    :name "viewport"
    :mixins [rum/reactive]}))

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;; Aside
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(defn aside-render
  [own]
  (let [workspace (rum/react wb/workspace-state)]
    (html
     [:aside#settings-bar.settings-bar
      [:div.settings-bar-inside
       (when (:draw-toolbox-enabled workspace false)
         (toolboxes/draw-tools))
       (when (:icons-toolbox-enabled workspace false)
         (toolboxes/icons))
       (when (:layers-toolbox-enabled workspace false)
         (toolboxes/layers))]])))

(def aside
  (util/component
   {:render aside-render
    :name "aside"
    :mixins [rum/reactive]}))

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;; Work Area
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(defn working-area-render
  [own]
  (let [workspace (rum/react wb/workspace-state)]
    (html
     [:section.workspace-canvas
      {:class (when (empty? (:toolboxes workspace)) "no-tool-bar")
       :on-scroll (constantly nil)}

      #_(when (:selected page)
          (element-options conn
                           page-cursor
                           project-cursor
                           zoom-cursor
                           shapes-cursor))
      (coordinates)
      (viewport)])))

(def workarea
  (util/component
   {:render working-area-render
    :name "workarea"
    :mixins [rum/reactive]}))