// -- copyright
// OpenProject is a project management system.
// Copyright (C) 2012-2015 the OpenProject Foundation (OPF)
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License version 3.
//
// OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
// Copyright (C) 2006-2013 Jean-Philippe Lang
// Copyright (C) 2010-2013 the ChiliProject Team
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
//
// See doc/COPYRIGHT.rdoc for more details.
// ++

angular
  .module('openproject.inplace-edit')
  .directive('inplaceEditorEditPane', inplaceEditorEditPane);

function inplaceEditorEditPane(EditableFieldsState, FocusHelper, $timeout) {
  return {
    transclude: true,
    require: '^workPackageField',
    templateUrl: '/components/inplace-edit/directives/edit-pane/edit-pane.directive.html',

    controllerAs: 'editPaneController',
    controller: InplaceEditorEditPaneController,

    link: function(scope, element, attrs, fieldController) {
      var field = scope.field;

      scope.fieldController = fieldController;
      scope.editableFieldsState = EditableFieldsState;

      scope.focusInput = function() {
        $timeout(function() {
          var inputElement = element.find('.focus-input');
          FocusHelper.focus(inputElement);
          inputElement.triggerHandler('keyup');
          scope.editPaneController.markActive();
          inputElement.off('focus.inplace').on('focus.inplace', function() {
            scope.$apply(function() {
              scope.editPaneController.markActive();
            });
          });
        });
      };

      if (!EditableFieldsState.forcedEditState) {
        element.bind('keydown keypress', function(e) {
          if (e.keyCode === 27 && !EditableFieldsState.editAll.state) {
            scope.$apply(function() {
              scope.editPaneController.discardEditing();
            });
          }
        });
      }

      scope.$watch('fieldController.isEditing', function(isEditing) {
        var efs = EditableFieldsState;

        if (isEditing && !efs.editAll.state && !efs.forcedEditState) {
          scope.focusInput();

        } else if (efs.editAll.state && efs.editAll.isFocusField(field.name)) {
          $timeout(function () {
            var focusElement = element.find('.focus-input');
            focusElement.length && focusElement.focus()[0].select();
          });
        }
      });
    }
  };
}

function InplaceEditorEditPaneController($scope, $element, $location, $timeout,
    EditableFieldsState, inplaceEditStorage, inplaceEditMultiStorage, inplaceEditErrors) {

  var vm = this;
  var field = $scope.field;
  var fieldLabel = field.getLabel();
  var wpStore = inplaceEditMultiStorage.stores.workPackage;

  this.saveTitle = I18n.t('js.inplace.button_save', { attribute: fieldLabel });
  this.cancelTitle = I18n.t('js.inplace.button_cancel', { attribute: fieldLabel });

  this.submit = function() {
    var detectedViolations = [];

    if (vm.editForm.$invalid) {
      Object.keys(vm.editForm.$error).forEach(function(error) {

        if (vm.editForm.$error[error]) {
          detectedViolations.push(I18n.t('js.inplace.errors.' + error, {
            field: field.getLabel()
          }));
        }
      });
    }

    if (detectedViolations.length) {
      inplaceEditErrors.errors = inplaceEditErrors.errors || {};
      inplaceEditErrors.errors[field.name] = detectedViolations.join(' ');
    }

    inplaceEditMultiStorage.save().then(function () {
      $location.hash(null);
      $timeout(function() {
        $element[0].scrollIntoView(false);
      });

    }).catch(function () {
      $scope.focusInput();
    });
  };

  this.discardEditing = function() {
    $scope.fieldController.isEditing = false;
    EditableFieldsState.discard(field.name);
  };

  this.isActive = function() {
    return EditableFieldsState.isActiveField(field.name);
  };

  this.markActive = function() {
    wpStore.active = true;
    EditableFieldsState.currentField = field.name;
  };

  this.isRequired = function() {
    return field.isRequired();
  };

  $scope.$watch('editableFieldsState.editAll.state', function(state) {
    $scope.fieldController.isEditing = state;
    $scope.fieldController.lockFocus = true;
  });

  $scope.$watch('field.value', function(value) {
    if ($scope.fieldController.isEditing) {
      var pendingChanges = EditableFieldsState.getPendingFormChanges();
      pendingChanges[field.name] = value;
      vm.markActive();
    }
  }, true);

  $scope.$watchCollection('field.resource.form', function(form) {
    var strategy = field.getInplaceEditStrategy();

    if (field.name === 'date' && strategy === 'date') {
      form.pendingChanges = EditableFieldsState.getPendingFormChanges();
      form.pendingChanges['startDate'] =
        form.pendingChanges['dueDate'] =
          field.value ? field.value['dueDate'] : null;
    }

    if (strategy !== $scope.strategy) {
      $scope.strategy = strategy;
      $scope.templateUrl = '/templates/inplace-edit/edit/fields/' + strategy + '.html';
    }
  });

  $scope.$on('form.updateRequired', function() {
    inplaceEditStorage.refreshWorkPackageForm();
  });

  $scope.$on('workPackageRefreshed', function() {
    vm.discardEditing();
  });
}