import angular from 'angular';
import _ from 'lodash';

var iconMap = {
  "external link": "fa-external-link",
  "dashboard": "fa-th-large",
  "question": "fa-question",
  "info": "fa-info",
  "bolt": "fa-bolt",
  "doc": "fa-file-text-o",
  "cloud": "fa-cloud",
};

function dashLinksEditor() {
  return {
    restrict: 'E',
    controller: 'DashLinkEditorCtrl',
    templateUrl: 'public/app/features/dashlinks/editor.html',
    link: function() {
    }
  };
}

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);
  }
}

export class DashLinkEditorCtrl {
  /** @ngInject */
  constructor($scope, $rootScope) {
    $scope.iconMap = iconMap;
    $scope.dashboard.links = $scope.dashboard.links || [];

    $scope.addLink = function() {
      $scope.dashboard.links.push({ type: 'dashboards', icon: 'external link' });
      $scope.dashboard.updateSubmenuVisibility();
      $scope.updated();
    };

    $scope.moveLink = function(index, dir) {
      _.move($scope.dashboard.links, index, index+dir);
      $scope.updated();
    };

    $scope.updated = function() {
      $rootScope.appEvent('dash-links-updated');
    };

    $scope.deleteLink = function(index) {
      $scope.dashboard.links.splice(index, 1);
      $scope.dashboard.updateSubmenuVisibility();
      $scope.updated();
    };
  }
}

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