/*jshint globalstrict:true */
/*global angular:true */
/*global FileReader:false*/
/*

  ## Dashcontrol

  ### Parameters
  * save
  ** gist :: Allow saving to gist. Requires registering an oauth domain with Github
  ** elasticsearch :: Allow saving to a special Kibana index within Elasticsearch
  ** local :: Allow saving to local file
  * load
  ** gist :: Allow loading from gists
  ** elasticsearch :: Allow searching and loading of elasticsearch saved dashboards
  ** local :: Allow loading of dashboards from Elasticsearch
  * hide_control :: Upon save, hide this panel
  * elasticsearch_size :: show this many dashboards under the ES section in the load drop down
  * temp :: Allow saving of temp dashboards
  * ttl :: Enable setting ttl.
  * temp_ttl :: How long should temp dashboards persist

*/
'use strict';

angular.module('kibana.dashcontrol', [])
.controller('dashcontrol', function($scope, $http, timer, dashboard, alertSrv) {

  $scope.panelMeta = {
    status  : "Stable",
    description : "This panel allows for saving, loading, exporting and sharing dashboard schemas."
  };

  $scope.panel = $scope.panel || {};
  // Set and populate defaults
  var _d = {
    save : {
      gist: false,
      elasticsearch: true,
      local: true,
      'default': true
    },
    load : {
      gist: true,
      elasticsearch: true,
      local: true
    },
    hide_control: false,
    elasticsearch_size: 20,
    temp: true,
    ttl_enable: true,
    temp_ttl: '30d'
  };
  _.defaults($scope.panel,_d);

  // A hash of defaults for the dashboard object
  var _dash = {
    title: "",
    editable: true,
    rows: [],
    services: {}
  };

  function notice(type, title, message) {
    alertSrv.set(title, message, type, 5000);
  }

  $scope.init = function() {
    $scope.gist_pattern = /(^\d{5,}$)|(^[a-z0-9]{10,}$)|(gist.github.com(\/*.*)\/[a-z0-9]{5,}\/*$)/;
    $scope.gist = {};
    $scope.elasticsearch = {};
  };

  $scope.set_default = function() {
    if(dashboard.set_default()) {
      notice('success', 'Local Default Set', dashboard.current.title+' has been set as your local default');
    } else {
      notice('error', 'Incompatible Browser', 'Sorry, your browser is too old for this feature');
    }
  };

  $scope.purge_default = function() {
    if(dashboard.purge_default()) {
      notice('success', 'Local Default Clear', 'Your local default dashboard has been cleared');
    } else {
      notice('error', 'Incompatible Browser', 'Sorry, your browser is too old for this feature');
    }
  };

  $scope.elasticsearch_save = function(type,ttl) {
    dashboard.elasticsearch_save(
      type,
      ($scope.elasticsearch.title || dashboard.current.title),
      ($scope.panel.ttl_enable ? ttl : false)
    ).then(
      function(result) {
      if(!_.isUndefined(result._id)) {
        notice(
          'success',
          'Dashboard Saved',
          'This dashboard has been saved to Elasticsearch as "'+result._id + '"'
        );
        if(type === 'temp') {
          $scope.share = dashboard.share_link(dashboard.current.title, 'temp', result._id);
        }
      } else {
        if (result.status === 404) {
          // auto create must be disabled and the index doesn't exist, create it!
          return dashboard.elasticsearch_create_index().then(function () {
            return $scope.elasticsearch_save(type, ttl);
          }, function () {
            notice(
              'error',
              'Save failed',
              'Dashboard could not be saved because the "'+config.kibana_index+'" '+
                'index does not exist and could not be created.'
            );
          });
        } else {
          notice('error', 'Save failed', 'Dashboard could not be saved to Elasticsearch');
        }
      }
    });
  };

  $scope.elasticsearch_delete = function(id) {
    dashboard.elasticsearch_delete(id).then(
      function(result) {
        if(!_.isUndefined(result)) {
          if(result.found) {
            notice('success', 'Dashboard Deleted', id+' has been deleted');
            // Find the deleted dashboard in the cached list and remove it
            var toDelete = _.where($scope.elasticsearch.dashboards,{_id:id})[0];
            $scope.elasticsearch.dashboards = _.without($scope.elasticsearch.dashboards,toDelete);
          } else {
            notice('warning', 'Dashboard Not Found', 'Could not find '+id+' in Elasticsearch');
          }
        } else {
          notice('error', 'Dashboard Not Deleted', 'An error occurred deleting the dashboard');
        }
      }
    );
  };

  $scope.elasticsearch_dblist = function(query) {
    dashboard.elasticsearch_list(query,$scope.panel.elasticsearch_size).then(
      function(result) {
      if(!_.isUndefined(result.hits)) {
        $scope.panel.error =  false;
        $scope.hits = result.hits.total;
        $scope.elasticsearch.dashboards = result.hits.hits;
      }
    });
  };

  $scope.save_gist = function() {
    dashboard.save_gist($scope.gist.title).then(
      function(link) {
      if(!_.isUndefined(link)) {
        $scope.gist.last = link;
        notice(
          'success',
          'Gist saved',
          'You will be able to access your exported dashboard file at '+
            '<a href="'+link+'">'+link+'</a> in a moment'
        );
      } else {
        notice('error', 'Save failed', 'Gist could not be saved');
      }
    });
  };

  $scope.gist_dblist = function(id) {
    dashboard.gist_list(id).then(
      function(files) {
      if(files && files.length > 0) {
        $scope.gist.files = files;
      } else {
        notice('error', 'Gist Failed', 'Could not retrieve dashboard list from gist',5000);
      }
    });
  };
})
.directive('dashUpload', function(timer, dashboard, alertSrv){
  return {
    restrict: 'A',
    link: function(scope, elem, attrs) {
      function file_selected(evt) {
        var files = evt.target.files; // FileList object

        // files is a FileList of File objects. List some properties.
        var output = [];
        var readerOnload = function(theFile) {
          return function(e) {
            dashboard.dash_load(JSON.parse(e.target.result));
            scope.$apply();
          };
        };
        for (var i = 0, f; f = files[i]; i++) {
          var reader = new FileReader();
          reader.onload = (readerOnload)(f);
          reader.readAsText(f);
        }
      }

      // Check for the various File API support.
      if (window.File && window.FileReader && window.FileList && window.Blob) {
        // Something
        document.getElementById('dashupload').addEventListener('change', file_selected, false);
      } else {
        alertSrv.set('Oops', 'Sorry, the HTML5 File APIs are not fully supported in this browser.', 'error', 5000);
      }
    }
  };
}).filter('gistid', function() {
  var gist_pattern = /(\d{5,})|([a-z0-9]{10,})|(gist.github.com(\/*.*)\/[a-z0-9]{5,}\/*$)/;
  return function(input, scope) {
    //return input+"boners"
    if(!(_.isUndefined(input))) {
      var output = input.match(gist_pattern);
      if(!_.isNull(output) && !_.isUndefined(output)) {
        return output[0].replace(/.*\//, '');
      }
    }
  };
});