import angular from "angular";
import _ from "lodash";
import { iconMap } from "./editor";

function dashLinksContainer() {
  return {
    scope: {
      links: "="
    },
    restrict: "E",
    controller: "DashLinksContainerCtrl",
    template:
      '<dash-link ng-repeat="link in generatedLinks" link="link"></dash-link>',
    link: function() {}
  };
}

/** @ngInject */
function dashLink($compile, linkSrv) {
  return {
    restrict: "E",
    link: function(scope, elem) {
      var link = scope.link;
      var template =
        '<div class="gf-form">' +
        '<a class="pointer gf-form-label" data-placement="bottom"' +
        (link.asDropdown
          ? ' ng-click="fillDropdown(link)" data-toggle="dropdown"'
          : "") +
        ">" +
        "<i></i> <span></span></a>";

      if (link.asDropdown) {
        template +=
          '<ul class="dropdown-menu" role="menu">' +
          '<li ng-repeat="dash in link.searchHits"><a href="{{dash.url}}">{{dash.title}}</a></li>' +
          "</ul>";
      }

      template += "</div>";

      elem.html(template);
      $compile(elem.contents())(scope);

      var anchor = elem.find("a");
      var icon = elem.find("i");
      var span = elem.find("span");

      function update() {
        var linkInfo = linkSrv.getAnchorInfo(link);
        span.text(linkInfo.title);
        anchor.attr("href", linkInfo.href);
      }

      // tooltip
      elem
        .find("a")
        .tooltip({ title: scope.link.tooltip, html: true, container: "body" });
      icon.attr("class", "fa fa-fw " + scope.link.icon);
      anchor.attr("target", scope.link.target);

      // fix for menus on the far right
      if (link.asDropdown && scope.$last) {
        elem.find(".dropdown-menu").addClass("pull-right");
      }

      update();
      scope.$on("refresh", update);
    }
  };
}

export class DashLinksContainerCtrl {
  /** @ngInject */
  constructor($scope, $rootScope, $q, backendSrv, dashboardSrv, linkSrv) {
    var currentDashId = dashboardSrv.getCurrent().id;

    function buildLinks(linkDef) {
      if (linkDef.type === "dashboards") {
        if (!linkDef.tags) {
          console.log("Dashboard link missing tag");
          return $q.when([]);
        }

        if (linkDef.asDropdown) {
          return $q.when([
            {
              title: linkDef.title,
              tags: linkDef.tags,
              keepTime: linkDef.keepTime,
              includeVars: linkDef.includeVars,
              icon: "fa fa-bars",
              asDropdown: true
            }
          ]);
        }

        return $scope.searchDashboards(linkDef, 7);
      }

      if (linkDef.type === "link") {
        return $q.when([
          {
            url: linkDef.url,
            title: linkDef.title,
            icon: iconMap[linkDef.icon],
            tooltip: linkDef.tooltip,
            target: linkDef.targetBlank ? "_blank" : "_self",
            keepTime: linkDef.keepTime,
            includeVars: linkDef.includeVars
          }
        ]);
      }

      return $q.when([]);
    }

    function updateDashLinks() {
      var promises = _.map($scope.links, buildLinks);

      $q.all(promises).then(function(results) {
        $scope.generatedLinks = _.flatten(results);
      });
    }

    $scope.searchDashboards = function(link, limit) {
      return backendSrv
        .search({ tag: link.tags, limit: limit })
        .then(function(results) {
          return _.reduce(
            results,
            function(memo, dash) {
              // do not add current dashboard
              if (dash.id !== currentDashId) {
                memo.push({
                  title: dash.title,
                  url: "dashboard/" + dash.uri,
                  icon: "fa fa-th-large",
                  keepTime: link.keepTime,
                  includeVars: link.includeVars
                });
              }
              return memo;
            },
            []
          );
        });
    };

    $scope.fillDropdown = function(link) {
      $scope.searchDashboards(link, 100).then(function(results) {
        _.each(results, function(hit) {
          hit.url = linkSrv.getLinkUrl(hit);
        });
        link.searchHits = results;
      });
    };

    updateDashLinks();
    $rootScope.onAppEvent("dash-links-updated", updateDashLinks, $scope);
  }
}

angular
  .module("grafana.directives")
  .directive("dashLinksContainer", dashLinksContainer);
angular.module("grafana.directives").directive("dashLink", dashLink);
angular
  .module("grafana.directives")
  .controller("DashLinksContainerCtrl", DashLinksContainerCtrl);