/**
 * @file ext-star.js
 *
 *
 * @copyright 2010 CloudCanvas, Inc. All rights reserved
 *
 */
export default {
  name: 'star',
  async init (S) {
    const svgEditor = this;
    const svgCanvas = svgEditor.canvas;

    const {$, importLocale} = S; // {svgcontent},
    let
      selElems,
      // editingitex = false,
      // svgdoc = S.svgroot.parentNode.ownerDocument,
      started,
      newFO;
      // edg = 0,
      // newFOG, newFOGParent, newDef, newImageName, newMaskID,
      // undoCommand = 'Not image',
      // modeChangeG, ccZoom, wEl, hEl, wOffset, hOffset, ccRgbEl, brushW, brushH;
    const strings = await importLocale();

    /**
     *
     * @param {boolean} on
     * @returns {void}
     */
    function showPanel (on) {
      let fcRules = $('#fc_rules');
      if (!fcRules.length) {
        fcRules = $('<style id="fc_rules"></style>').appendTo('head');
      }
      fcRules.text(!on ? '' : ' #tool_topath { display: none !important; }');
      $('#star_panel').toggle(on);
    }

    /*
    function toggleSourceButtons(on){
      $('#star_save, #star_cancel').toggle(on);
    }
    */

    /**
     *
     * @param {string} attr
     * @param {string|Float} val
     * @returns {void}
     */
    function setAttr (attr, val) {
      svgCanvas.changeSelectedAttribute(attr, val);
      svgCanvas.call('changed', selElems);
    }

    /*
    function cot(n){
      return 1 / Math.tan(n);
    }

    function sec(n){
      return 1 / Math.cos(n);
    }
    */
    const buttons = [{
      id: 'tool_star',
      icon: svgEditor.curConfig.extIconsPath + 'star.png',
      type: 'mode',
      position: 12,
      events: {
        click () {
          showPanel(true);
          svgCanvas.setMode('star');
        }
      }
    }];
    const contextTools = [{
      type: 'input',
      panel: 'star_panel',
      id: 'starNumPoints',
      size: 3,
      defval: 5,
      events: {
        change () {
          setAttr('point', this.value);
        }
      }
    }, {
      type: 'input',
      panel: 'star_panel',
      id: 'starRadiusMulitplier',
      size: 3,
      defval: 2.5
    }, {
      type: 'input',
      panel: 'star_panel',
      id: 'radialShift',
      size: 3,
      defval: 0,
      events: {
        change () {
          setAttr('radialshift', this.value);
        }
      }
    }];

    return {
      name: strings.name,
      svgicons: svgEditor.curConfig.extIconsPath + 'star-icons.svg',
      buttons: strings.buttons.map((button, i) => {
        return Object.assign(buttons[i], button);
      }),
      context_tools: strings.contextTools.map((contextTool, i) => {
        return Object.assign(contextTools[i], contextTool);
      }),
      callback () {
        $('#star_panel').hide();
        // const endChanges = function(){};
      },
      mouseDown (opts) {
        const rgb = svgCanvas.getColor('fill');
        // const ccRgbEl = rgb.substring(1, rgb.length);
        const sRgb = svgCanvas.getColor('stroke');
        // const ccSRgbEl = sRgb.substring(1, rgb.length);
        const sWidth = svgCanvas.getStrokeWidth();

        if (svgCanvas.getMode() === 'star') {
          started = true;

          newFO = svgCanvas.addSVGElementFromJson({
            element: 'polygon',
            attr: {
              cx: opts.start_x,
              cy: opts.start_y,
              id: svgCanvas.getNextId(),
              shape: 'star',
              point: document.getElementById('starNumPoints').value,
              r: 0,
              radialshift: document.getElementById('radialShift').value,
              r2: 0,
              orient: 'point',
              fill: rgb,
              strokecolor: sRgb,
              strokeWidth: sWidth
            }
          });
          return {
            started: true
          };
        }
        return undefined;
      },
      mouseMove (opts) {
        if (!started) {
          return undefined;
        }
        if (svgCanvas.getMode() === 'star') {
          const c = $(newFO).attr(['cx', 'cy', 'point', 'orient', 'fill', 'strokecolor', 'strokeWidth', 'radialshift']);

          let x = opts.mouse_x;
          let y = opts.mouse_y;
          const {cx, cy, fill, strokecolor, strokeWidth, radialshift, point, orient} = c,
            circumradius = (Math.sqrt((x - cx) * (x - cx) + (y - cy) * (y - cy))) / 1.5,
            inradius = circumradius / document.getElementById('starRadiusMulitplier').value;
          newFO.setAttribute('r', circumradius);
          newFO.setAttribute('r2', inradius);

          let polyPoints = '';
          for (let s = 0; point >= s; s++) {
            let angle = 2.0 * Math.PI * (s / point);
            if (orient === 'point') {
              angle -= (Math.PI / 2);
            } else if (orient === 'edge') {
              angle = (angle + (Math.PI / point)) - (Math.PI / 2);
            }

            x = (circumradius * Math.cos(angle)) + cx;
            y = (circumradius * Math.sin(angle)) + cy;

            polyPoints += x + ',' + y + ' ';

            if (!isNaN(inradius)) {
              angle = (2.0 * Math.PI * (s / point)) + (Math.PI / point);
              if (orient === 'point') {
                angle -= (Math.PI / 2);
              } else if (orient === 'edge') {
                angle = (angle + (Math.PI / point)) - (Math.PI / 2);
              }
              angle += radialshift;

              x = (inradius * Math.cos(angle)) + cx;
              y = (inradius * Math.sin(angle)) + cy;

              polyPoints += x + ',' + y + ' ';
            }
          }
          newFO.setAttribute('points', polyPoints);
          newFO.setAttribute('fill', fill);
          newFO.setAttribute('stroke', strokecolor);
          newFO.setAttribute('stroke-width', strokeWidth);
          /* const shape = */ newFO.getAttribute('shape');

          return {
            started: true
          };
        }
        return undefined;
      },
      mouseUp () {
        if (svgCanvas.getMode() === 'star') {
          const attrs = $(newFO).attr(['r']);
          // svgCanvas.addToSelection([newFO], true);
          return {
            keep: (attrs.r !== '0'),
            element: newFO
          };
        }
        return undefined;
      },
      selectedChanged (opts) {
        // Use this to update the current selected elements
        selElems = opts.elems;

        let i = selElems.length;
        while (i--) {
          const elem = selElems[i];
          if (elem && elem.getAttribute('shape') === 'star') {
            if (opts.selectedElement && !opts.multiselected) {
              // $('#starRadiusMulitplier').val(elem.getAttribute('r2'));
              $('#starNumPoints').val(elem.getAttribute('point'));
              $('#radialShift').val(elem.getAttribute('radialshift'));
              showPanel(true);
            } else {
              showPanel(false);
            }
          } else {
            showPanel(false);
          }
        }
      },
      elementChanged (opts) {
        // const elem = opts.elems[0];
      }
    };
  }
};