import template from "./Tabs.html";
import style from "antd/lib/tabs/style/index.css";
angular.module("esNgAntd").directive("antdTabs", ["esNgAntd", function (esNgAntd) {
  return {
    template: template,
    restrict: "E",
    replace: true,
    transclude: true,
    scope: {
      defaultActiveKey: "@",
      onChange: "&"
    },
    controller: function ($scope, $element) {
      this.getContext = function () {
        return $scope;
      };

      $scope.state = {
        childrens: [],
        labels: [],
        tabWidth: 0,
        offsetLeft: 0,
        activeKey: $scope.defaultActiveKey
      };

      $scope.handleClick = function (labelKey, tabKey, event) {
        let target = event.target;
        $scope.state.tabWidth = target.clientWidth;
        let currentMarginLeft = parseFloat(getComputedStyle(target, null).marginLeft);
        let beforeTarget = Array.prototype.slice.call(target.parentNode.querySelectorAll("div")).splice(0, tabKey);

        if (beforeTarget.length > 0) {
          $scope.state.offsetLeft = beforeTarget.map(function (item) {
            return item.clientWidth + parseFloat(getComputedStyle(item, null).marginLeft);
          }).reduce(function (prev, curr) {
            return prev + curr;
          }) + currentMarginLeft;
        } else {
          $scope.state.offsetLeft = 0;
        }

        $scope.state.activeKey = labelKey;
        $scope.state.childrens.forEach(function (element) {
          element.state.activeKey = labelKey;
        });
        $scope.onChange({
          key: labelKey
        });
      };
    },
    link: function ($scope, $element) {
      esNgAntd.createStyle("ant-tabs", style);

      if ($scope.defaultActiveKey) {
        setTimeout(() => {
          if ($element[0].querySelector(".ant-tabs-tab-active")) {
            $scope.state.tabWidth = $element[0].querySelector(".ant-tabs-tab-active").clientWidth;
            $scope.$apply();
          }
        }, 0);
      }
    }
  };
}]);