(function() {
  'use strict';

  angular
    .module('dialoga')
    .controller('PropostasPageController', PropostasPageController);

  /** @ngInject */
  function PropostasPageController(DialogaService, $scope, $rootScope, $location, $filter, $log) {
    var vm = this;

    vm.DialogaService = DialogaService;
    vm.$scope = $scope;
    vm.$rootScope = $rootScope;
    vm.$location = $location;
    vm.$filter = $filter;
    vm.$log = $log;

    vm.init();
    vm.loadData();
    // vm.attachListeners(); // attach listeners after load data (SYNC)
    vm.$rootScope.focusMainContent();

    $log.debug('PropostasPageController');
  }

  PropostasPageController.prototype.init = function() {
    var vm = this;

    vm.themes = null;
    vm.selectedTheme = null;
    vm.filtredPrograms = null;
    vm.selectedProgram = null;
    vm.proposals = null;
    vm.filtredProposals = null;
    vm.query = null;
    vm.search = vm.$location.search();

    vm.loading = null;
    vm.error = null;
  };

  PropostasPageController.prototype.loadData = function() {
    var vm = this;

    vm.loading = true;

    // Behaviour:
    // 1. Load themes
    // 1. Load Proposals per_page
    // END.

    // 1. Load themes
    vm.loadingThemes = true;
    vm.DialogaService.getThemes(function(themes) {
      vm.themes = themes;
      vm.loadingThemes = false;
      vm.loading = false;

      vm.loadProposals(function() {
        vm.attachListeners();
      });
    }, function(error) {
      vm.error = error;
      vm.$log.error(error);
      vm.loadingThemes = false;
      vm.loading = false;
    });
  };

  PropostasPageController.prototype.loadProposals = function(cb) {
    var vm = this;

    // load Proposals
    vm.loadingProposals = true;
    vm.DialogaService.getProposals({}, function(data) {
      vm.proposals = data.articles;
      vm.filtredProposals = vm.proposals;
      vm.loadingProposals = false;
      vm.loading = false;

      if (cb) {
        cb();
      }
    }, function(error) {
      vm.error = error;
      vm.$log.error(error);
      vm.loadingProposals = false;
      vm.loading = false;
    });
  };

  PropostasPageController.prototype.attachListeners = function() {
    var vm = this;

    vm.$scope.$on('change-selectedCategory', function(event, selectedCategory) {
      vm.selectedTheme = selectedCategory;
    });

    vm.$scope.$watch('pagePropostas.selectedTheme', function(newValue/*, oldValue*/) {
      vm.search.tema = newValue ? newValue.slug : null;
      vm.$location.search('tema', vm.search.tema);
      vm.filtredProposals = vm.getFiltredProposals();
    });

    vm.$scope.$on('change-selectedTopic', function(event, selectedTopic) {
      vm.selectedProgram = selectedTopic;
    });

    vm.$scope.$watch('pagePropostas.selectedProgram', function(newValue/*, oldValue*/) {
      vm.search.programa = newValue ? newValue.slug : null;
      vm.$location.search('programa', vm.search.programa);
      vm.filtredProposals = vm.getFiltredProposals();
    });

    vm.$scope.$watch('pagePropostas.query', function(newValue/*, oldValue*/) {
      vm.search.filtro = newValue ? newValue : null;
      vm.$location.search('filtro', vm.search.filtro);
      vm.filtredProposals = vm.getFiltredProposals();
    });
  };

  PropostasPageController.prototype.resetFilterValues = function() {
    var vm = this;

    vm.query = null;
    vm.selectedTheme = null;
  };

  PropostasPageController.prototype.getFiltredProposals = function() {
    var vm = this;

    if (!vm.proposals) {
      vm.$log.info('No proposals loaded yet. Abort.');
      return null;
    }

    var input = vm.proposals;
    var output = input;
    var query = vm.query;
    var selectedTheme = vm.selectedTheme;
    var selectedProgram = vm.selectedProgram;

    var filter = vm.$filter('filter');

    if (selectedTheme) {
      output = vm.DialogaService.filterProposalsByCategorySlug(output, selectedTheme.slug);
    }

    if (selectedProgram) {
      output = vm.DialogaService.filterProposalsByProgramId(output, selectedProgram.id);
    }

    if (query) {
      output = filter(output, query, false);
    }

    return output;
  };

  PropostasPageController.prototype.submitSearch = function() {
    var vm = this;

    vm.loadingFilter = true;

    // scroll to result grid
    var $searchResult = angular.element('#search-result');
    if ($searchResult && $searchResult.length > 0) {
      angular.element('body').animate({scrollTop: $searchResult.offset().top}, 'fast');
      vm.filtredProposals = vm.getFiltredProposals();
    }else {
      vm.$log.warn('#search-result element not found.');
    }
  };

})();