const Obj = {
  init: () => {
    class GoogleMapsHtmlOverlay extends google.maps.OverlayView {
      constructor(options) {
        super();
        const ui = this;

        ui.setMap(options.map);
        ui.position = options.position;
        ui.html =
          (options.html ?
            options.html :
            '<div class="mapboxgl-marker"><i class="marker-icon fas fa-map-marker-alt"></i></div>'
          );
        ui.divClass = options.divClass;
        ui.align = options.align;
        ui.isDebugMode = options.debug;
        ui.onClick = options.onClick;
        ui.onMouseOver = options.onMouseOver;

        ui.isBoolean = (arg) => {
          if (typeof arg === 'boolean') {
            return true;
          } else {
            return false;
          }
        };

        ui.isNotUndefined = (arg) => {
          if (typeof arg !== 'undefined') {
            return true;
          } else {
            return false;
          }
        };

        ui.hasContent = (arg) => {
          if (arg.length > 0) {
            return true;
          } else {
            return false;
          }
        };

        ui.isString = (arg) => {
          if (typeof arg === 'string') {
            return true;
          } else {
            return false;
          }
        };

        ui.isFunction = (arg) => {
          if (typeof arg === 'function') {
            return true;
          } else {
            return false;
          }
        };
      }
      onAdd() {
        const ui = this;

        // Create div element.
        ui.div = document.createElement('div');
        ui.div.style.position = 'absolute';

        // Validate and set custom div class
        if (ui.isNotUndefined(ui.divClass) && ui.hasContent(ui.divClass))
          ui.div.className = ui.divClass;

        // Validate and set custom HTML
        if (
          ui.isNotUndefined(ui.html) &&
          ui.hasContent(ui.html) &&
          ui.isString(ui.html)
        )
          ui.div.innerHTML = ui.html;

        // If debug mode is enabled custom content will be replaced with debug content
        if (ui.isBoolean(ui.isDebugMode) && ui.isDebugMode) {
          ui.div.className = 'debug-mode';
          ui.div.innerHTML =
            '<div style="height: 10px; width: 10px; background: red; border-radius: 100%;"></div>' +
            '<div style="position: absolute; top: 5px; padding: 5px; width: 130px; text-align: center; font-size: 18px; text-transform: uppercase; font-weight: bolder; background: red; color: white; font-family: Arial;">Debug mode</div>';
          ui.div.setAttribute(
            'style',
            'position: absolute;' +
            'border: 5px dashed red;' +
            'height: 150px;' +
            'width: 150px;' +
            'display: flex;' +
            'justify-content: center;' +
            'align-items: center;'
          );
        }

        // Add element to clickable layer
        ui.getPanes().overlayMouseTarget.appendChild(ui.div);

        // Add listeners to the element.
        google.maps.event.addDomListener(ui.div, 'click', (event) => {
          google.maps.event.trigger(ui, 'click');
          if (ui.isFunction(ui.onClick)) ui.onClick();
          event.stopPropagation();
        });

        google.maps.event.addDomListener(ui.div, 'mouseover', (event) => {
          google.maps.event.trigger(ui, 'mouseover');
          if (ui.isFunction(ui.onMouseOver)) ui.onMouseOver();
          event.stopPropagation();
        });
      }

      draw() {
        const ui = this;

        // Calculate position of div
        var positionInPixels = ui.getProjection().fromLatLngToDivPixel(
          new google.maps.LatLng(ui.position)
        );

        // Align HTML overlay relative to original position
        var divOffset = {
          y: undefined,
          x: undefined,
        };

        switch (Array.isArray(ui.align) ? ui.align.join(' ') : '') {
          case 'left top':
            divOffset.y = ui.div.offsetHeight;
            divOffset.x = ui.div.offsetWidth;
            break;
          case 'left center':
            divOffset.y = ui.div.offsetHeight / 2;
            divOffset.x = ui.div.offsetWidth;
            break;
          case 'left bottom':
            divOffset.y = 0;
            divOffset.x = ui.div.offsetWidth;
            break;
          case 'center top':
            divOffset.y = ui.div.offsetHeight;
            divOffset.x = ui.div.offsetWidth / 2;
            break;
          case 'center center':
            divOffset.y = ui.div.offsetHeight / 2;
            divOffset.x = ui.div.offsetWidth / 2;
            break;
          case 'center bottom':
            divOffset.y = 0;
            divOffset.x = ui.div.offsetWidth / 2;
            break;
          case 'right top':
            divOffset.y = ui.div.offsetHeight;
            divOffset.x = 0;
            break;
          case 'right center':
            divOffset.y = ui.div.offsetHeight / 2;
            divOffset.x = 0;
            break;
          case 'right bottom':
            divOffset.y = 0;
            divOffset.x = 0;
            break;
          default:
            divOffset.y = ui.div.offsetHeight / 2;
            divOffset.x = ui.div.offsetWidth / 2;
        }

        // Set position
        ui.div.style.top = `${positionInPixels.y - divOffset.y  }px`;
        ui.div.style.left = `${positionInPixels.x - divOffset.x  }px`;
      }

      getPosition() {
        const ui = this;
        return ui.position;
      }

      getDiv() {
        const ui = this;
        return ui.div;
      }

      setPosition(position, align) {
        const ui = this;
        ui.position = position;
        ui.align = align;
        ui.draw();
      }
    }
    return GoogleMapsHtmlOverlay;
  },
}

export default Obj;