{{ define "content" }}

<main role="main" class="" style="height:100%;" x-data="editor()" x-init="setup_canvas();">
  <div id="tools-top" x-show="!toolbar">
    <button type="button" @click="add_some_text()" class="btn btn-primary">Add text</button>
    <button type="button" @click="crop()" class="btn btn-primary">Crop</button>
    <button type="button" @click="crop()" class="btn btn-primary">Apply</button>
  </div>
  <div id="tools-colour" x-show="toolbar == 'text'">
    <table>
      <tr>
        <th>foreground</th>
        <template x-for="colour in colours">
          <td>
            <button type="button" @click="set_colour(colour, 'fg')" class="btn btn-primary" :style="'background-color: '+colour">&nbsp;</button>
          </td>
        </template>
        <td>
          <button type="button" @click="set_colour('#fff0', 'fg')" class="btn btn-primary" style="">-</button>
        </td>
      </tr>

      <tr>
        <th>background</th>
        <template x-for="colour in colours">
          <td>
            <button type="button" @click="set_colour(colour, 'bg')" class="btn btn-primary" :style="'background-color: '+colour">&nbsp;</button>
          </td>
        </template>
        <td>
          <button type="button" @click="set_colour('#fff0', 'bg')" class="btn btn-primary" style="">-</button>
        </td>
      </tr>

      <tr>
        <th>outline</th>
        <template x-for="colour in colours">
          <td>
            <button type="button" @click="set_colour(colour, 'stroke')" class="btn btn-primary" :style="'background-color: '+colour">&nbsp;</button>
          </td>
        </template>
        <td>
          <button type="button" @click="set_colour('#fff0', 'stroke')" class="btn btn-primary" style="">-</button>
        </td>
      </tr>
    </table>
  </div>

  <canvas id="c" width="600" height="600" x-bind:style="canvas_style"></canvas>
  <img :src="img_data">
</main>

{{ end }}

{{ define "js" }}

<script>
// for some reason, canvas does not work correctly if the object 
// is managed by alpine - see https://github.com/fabricjs/fabric.js/issues/7485
var canvas = null;

function editor() {
  return {
    img_data: "", scaleFactor: 1.0, 
    toolbar: null,
    colours: [ 'red', 'blue', 'green', 'white', 'yellow', 'black', 'purple'],

    canvas_style: "",
    // "position: absolute; width: 100%; height: 100%; left: 0px; top: 0px; touch-action: none; -webkit-user-select: none;",
    setup_canvas() {
      // seriously javascript? just imagine, in 2021....
      var url = new URL(window.location);
      var id = url.searchParams.get("id");
      var self = this;
      canvas = new fabric.Canvas('c');

      canvas.on('selection:cleared', function(options) {
        self.toolbar = null;
      });
      
      fabric.Image.fromURL('/rest/image/'+id, function(oImg) {
        canvas.setDimensions({width: oImg.width, height: oImg.height});
        oImg.selectable = false;
        canvas.add(oImg);
        // self.canvas.setHeight(self.canvas.getHeight() * (self.scaleFactor));
        // self.canvas.setWidth(self.canvas.getWidth() * (self.scaleFactor));
        // self.canvas.setZoom(self.scaleFactor);
      });
    },
    export_image() {
      this.img_data = canvas.toDataURL({multiplier: 1/this.scaleFactor});
    },
    add_some_text() {
      var text = new fabric.Textbox('double click to change', { left: 20, top: 20, width: 300, fontSize: 40 });
      canvas.add(text);
      canvas.setActiveObject(text);
      this.toolbar = 'text';
      var self = this;
      text.on('selected', function(options) {
        self.toolbar = 'text';
      });
    },
    set_colour(colour, type) {
      selected = canvas.getActiveObjects();
      console.log();
      selected.forEach(el => {
        if (type === 'fg') {
          el.set('fill', colour);
        }
        if (type === 'bg') {
          el.set('textBackgroundColor', colour);
        }
        if (type === 'stroke') {
          el.set('stroke', colour);
        }

//["stroke","strokeWidth","fill","fontFamily","fontSize","fontWeight","fontStyle","underline","overline","linethrough","deltaY","textBackgroundColor"]


      });
      canvas.renderAll();
    }
    
//    selection:cleared



  }
}
  
</script>


{{ end }}