angular.module('ui.bootstrap.datepickerPopup', ['ui.bootstrap.datepicker', 'ui.bootstrap.position'])

.value('$datepickerPopupLiteralWarning', true)

.constant('uibDatepickerPopupConfig', {
  altInputFormats: [],
  appendToBody: false,
  clearText: 'Clear',
  closeOnDateSelection: true,
  closeText: 'Done',
  currentText: 'Today',
  datepickerPopup: 'yyyy-MM-dd',
  datepickerPopupTemplateUrl: 'uib/template/datepickerPopup/popup.html',
  datepickerTemplateUrl: 'uib/template/datepicker/datepicker.html',
  html5Types: {
    date: 'yyyy-MM-dd',
    'datetime-local': 'yyyy-MM-ddTHH:mm:ss.sss',
    'month': 'yyyy-MM'
  },
  onOpenFocus: true,
  showButtonBar: true,
  placement: 'auto bottom-left'
})

.controller('UibDatepickerPopupController', ['$scope', '$element', '$attrs', '$compile', '$log', '$parse', '$window', '$document', '$rootScope', '$uibPosition', 'dateFilter', 'uibDateParser', 'uibDatepickerPopupConfig', '$timeout', 'uibDatepickerConfig', '$datepickerPopupLiteralWarning',
function($scope, $element, $attrs, $compile, $log, $parse, $window, $document, $rootScope, $position, dateFilter, dateParser, datepickerPopupConfig, $timeout, datepickerConfig, $datepickerPopupLiteralWarning) {
  var cache = {},
    isHtml5DateInput = false;
  var dateFormat, closeOnDateSelection, appendToBody, onOpenFocus,
    datepickerPopupTemplateUrl, datepickerTemplateUrl, popupEl, datepickerEl, scrollParentEl,
    ngModel, ngModelOptions, $popup, altInputFormats, watchListeners = [];

  this.init = function(_ngModel_) {
    ngModel = _ngModel_;
    ngModelOptions = extractOptions(ngModel);
    closeOnDateSelection = angular.isDefined($attrs.closeOnDateSelection) ?
      $scope.$parent.$eval($attrs.closeOnDateSelection) :
      datepickerPopupConfig.closeOnDateSelection;
    appendToBody = angular.isDefined($attrs.datepickerAppendToBody) ?
      $scope.$parent.$eval($attrs.datepickerAppendToBody) :
      datepickerPopupConfig.appendToBody;
    onOpenFocus = angular.isDefined($attrs.onOpenFocus) ?
      $scope.$parent.$eval($attrs.onOpenFocus) : datepickerPopupConfig.onOpenFocus;
    datepickerPopupTemplateUrl = angular.isDefined($attrs.datepickerPopupTemplateUrl) ?
      $attrs.datepickerPopupTemplateUrl :
      datepickerPopupConfig.datepickerPopupTemplateUrl;
    datepickerTemplateUrl = angular.isDefined($attrs.datepickerTemplateUrl) ?
      $attrs.datepickerTemplateUrl : datepickerPopupConfig.datepickerTemplateUrl;
    altInputFormats = angular.isDefined($attrs.altInputFormats) ?
      $scope.$parent.$eval($attrs.altInputFormats) :
      datepickerPopupConfig.altInputFormats;

    $scope.showButtonBar = angular.isDefined($attrs.showButtonBar) ?
      $scope.$parent.$eval($attrs.showButtonBar) :
      datepickerPopupConfig.showButtonBar;

    if (datepickerPopupConfig.html5Types[$attrs.type]) {
      dateFormat = datepickerPopupConfig.html5Types[$attrs.type];
      isHtml5DateInput = true;
    } else {
      dateFormat = $attrs.uibDatepickerPopup || datepickerPopupConfig.datepickerPopup;
      $attrs.$observe('uibDatepickerPopup', function(value, oldValue) {
        var newDateFormat = value || datepickerPopupConfig.datepickerPopup;
        // Invalidate the $modelValue to ensure that formatters re-run
        // FIXME: Refactor when PR is merged: https://github.com/angular/angular.js/pull/10764
        if (newDateFormat !== dateFormat) {
          dateFormat = newDateFormat;
          ngModel.$modelValue = null;

          if (!dateFormat) {
            throw new Error('uibDatepickerPopup must have a date format specified.');
          }
        }
      });
    }

    if (!dateFormat) {
      throw new Error('uibDatepickerPopup must have a date format specified.');
    }

    if (isHtml5DateInput && $attrs.uibDatepickerPopup) {
      throw new Error('HTML5 date input types do not support custom formats.');
    }

    // popup element used to display calendar
    popupEl = angular.element(
      "<div uib-datepicker-popup-wrap data-ng-class=\"{'show': isOpen}\"><div uib-datepicker></div></div>"
    );

    popupEl.attr({
      'ng-model': 'date',
      'ng-change': 'dateSelection(date)',
      'template-url': datepickerPopupTemplateUrl
    });

    // datepicker element
    datepickerEl = angular.element(popupEl.children()[0]);
    datepickerEl.attr('template-url', datepickerTemplateUrl);

    if (!$scope.datepickerOptions) {
      $scope.datepickerOptions = {};
    }

    if (isHtml5DateInput) {
      if ($attrs.type === 'month') {
        $scope.datepickerOptions.datepickerMode = 'month';
        $scope.datepickerOptions.minMode = 'month';
      }
    }

    datepickerEl.attr('datepicker-options', 'datepickerOptions');

    if (!isHtml5DateInput) {
      // Internal API to maintain the correct ng-invalid-[key] class
      ngModel.$$parserName = 'date';
      ngModel.$validators.date = validator;
      ngModel.$parsers.unshift(parseDate);
      ngModel.$formatters.push(function(value) {
        if (ngModel.$isEmpty(value)) {
          $scope.date = value;
          return value;
        }

        if (angular.isNumber(value)) {
          value = new Date(value);
        }

        $scope.date = dateParser.fromTimezone(value, ngModelOptions.getOption('timezone'));

        return dateParser.filter($scope.date, dateFormat);
      });
    } else {
      ngModel.$formatters.push(function(value) {
        $scope.date = dateParser.fromTimezone(value, ngModelOptions.getOption('timezone'));
        return value;
      });
    }

    // Detect changes in the view from the text box
    ngModel.$viewChangeListeners.push(function() {
      $scope.date = parseDateString(ngModel.$viewValue);
    });

    $element.on('keydown', inputKeydownBind);

    $popup = $compile(popupEl)($scope);
    // Prevent jQuery cache memory leak (template is now redundant after linking)
    popupEl.remove();

    if (appendToBody) {
      $document.find('body').append($popup);
    } else {
      $element.after($popup);
    }

    $scope.$on('$destroy', function() {
      if ($scope.isOpen === true) {
        if (!$rootScope.$$phase) {
          $scope.$apply(function() {
            $scope.isOpen = false;
          });
        }
      }

      $popup.remove();
      $element.off('keydown', inputKeydownBind);
      $document.off('click', documentClickBind);
      if (scrollParentEl) {
        scrollParentEl.off('scroll', positionPopup);
      }
      angular.element($window).off('resize', positionPopup);

      //Clear all watch listeners on destroy
      while (watchListeners.length) {
        watchListeners.shift()();
      }
    });
  };

  $scope.getText = function(key) {
    return $scope[key + 'Text'] || datepickerPopupConfig[key + 'Text'];
  };

  $scope.isDisabled = function(date) {
    if (date === 'today') {
      date = dateParser.fromTimezone(new Date(), ngModelOptions.getOption('timezone'));
    }

    var dates = {};
    angular.forEach(['minDate', 'maxDate'], function(key) {
      if (!$scope.datepickerOptions[key]) {
        dates[key] = null;
      } else if (angular.isDate($scope.datepickerOptions[key])) {
        dates[key] = new Date($scope.datepickerOptions[key]);
      } else {
        if ($datepickerPopupLiteralWarning) {
          $log.warn('Literal date support has been deprecated, please switch to date object usage');
        }

        dates[key] = new Date(dateFilter($scope.datepickerOptions[key], 'medium'));
      }
    });

    return $scope.datepickerOptions &&
      dates.minDate && $scope.compare(date, dates.minDate) < 0 ||
      dates.maxDate && $scope.compare(date, dates.maxDate) > 0;
  };

  $scope.compare = function(date1, date2) {
    return new Date(date1.getFullYear(), date1.getMonth(), date1.getDate()) - new Date(date2.getFullYear(), date2.getMonth(), date2.getDate());
  };

  // Inner change
  $scope.dateSelection = function(dt) {
    $scope.date = dt;
    var date = $scope.date ? dateParser.filter($scope.date, dateFormat) : null; // Setting to NULL is necessary for form validators to function
    $element.val(date);
    ngModel.$setViewValue(date);

    if (closeOnDateSelection) {
      $scope.isOpen = false;
      $element[0].focus();
    }
  };

  $scope.keydown = function(evt) {
    if (evt.which === 27) {
      evt.stopPropagation();
      $scope.isOpen = false;
      $element[0].focus();
    }
  };

  $scope.select = function(date, evt) {
    evt.stopPropagation();

    if (date === 'today') {
      var today = new Date();
      if (angular.isDate($scope.date)) {
        date = new Date($scope.date);
        date.setFullYear(today.getFullYear(), today.getMonth(), today.getDate());
      } else {
        date = dateParser.fromTimezone(today, ngModelOptions.getOption('timezone'));
        date.setHours(0, 0, 0, 0);
      }
    }
    $scope.dateSelection(date);
  };

  $scope.close = function(evt) {
    evt.stopPropagation();

    $scope.isOpen = false;
    $element[0].focus();
  };

  $scope.disabled = angular.isDefined($attrs.disabled) || false;
  if ($attrs.ngDisabled) {
    watchListeners.push($scope.$parent.$watch($parse($attrs.ngDisabled), function(disabled) {
      $scope.disabled = disabled;
    }));
  }

  $scope.$watch('isOpen', function(value) {
    if (value) {
      if (!$scope.disabled) {
        $timeout(function() {
          positionPopup();

          if (onOpenFocus) {
            $scope.$broadcast('uib:datepicker.focus');
          }

          $document.on('click', documentClickBind);

          var placement = $attrs.popupPlacement ? $attrs.popupPlacement : datepickerPopupConfig.placement;
          if (appendToBody || $position.parsePlacement(placement)[2]) {
            scrollParentEl = scrollParentEl || angular.element($position.scrollParent($element));
            if (scrollParentEl) {
              scrollParentEl.on('scroll', positionPopup);
            }
          } else {
            scrollParentEl = null;
          }

          angular.element($window).on('resize', positionPopup);
        }, 0, false);
      } else {
        $scope.isOpen = false;
      }
    } else {
      $document.off('click', documentClickBind);
      if (scrollParentEl) {
        scrollParentEl.off('scroll', positionPopup);
      }
      angular.element($window).off('resize', positionPopup);
    }
  });

  function cameltoDash(string) {
    return string.replace(/([A-Z])/g, function($1) { return '-' + $1.toLowerCase(); });
  }

  function parseDateString(viewValue) {
    var date = dateParser.parse(viewValue, dateFormat, $scope.date);
    if (isNaN(date)) {
      for (var i = 0; i < altInputFormats.length; i++) {
        date = dateParser.parse(viewValue, altInputFormats[i], $scope.date);
        if (!isNaN(date)) {
          return date;
        }
      }
    }
    return date;
  }

  function parseDate(viewValue) {
    if (angular.isNumber(viewValue)) {
      // presumably timestamp to date object
      viewValue = new Date(viewValue);
    }

    if (!viewValue) {
      return null;
    }

    if (angular.isDate(viewValue) && !isNaN(viewValue)) {
      return viewValue;
    }

    if (angular.isString(viewValue)) {
      var date = parseDateString(viewValue);
      if (!isNaN(date)) {
        return dateParser.toTimezone(date, ngModelOptions.getOption('timezone'));
      }
    }

    return ngModelOptions.getOption('allowInvalid') ? viewValue : undefined;
  }

  function validator(modelValue, viewValue) {
    var value = modelValue || viewValue;

    if (!$attrs.ngRequired && !value) {
      return true;
    }

    if (angular.isNumber(value)) {
      value = new Date(value);
    }

    if (!value) {
      return true;
    }

    if (angular.isDate(value) && !isNaN(value)) {
      return true;
    }

    if (angular.isString(value)) {
      return !isNaN(parseDateString(value));
    }

    return false;
  }

  function documentClickBind(event) {
    if (!$scope.isOpen && $scope.disabled) {
      return;
    }

    var popup = $popup[0];
    var dpContainsTarget = $element[0].contains(event.target);
    // The popup node may not be an element node
    // In some browsers (IE) only element nodes have the 'contains' function
    var popupContainsTarget = popup.contains !== undefined && popup.contains(event.target);
    if ($scope.isOpen && !(dpContainsTarget || popupContainsTarget)) {
      $scope.$apply(function() {
        $scope.isOpen = false;
      });
    }
  }

  function inputKeydownBind(evt) {
    if (evt.which === 27 && $scope.isOpen) {
      evt.preventDefault();
      evt.stopPropagation();
      $scope.$apply(function() {
        $scope.isOpen = false;
      });
      $element[0].focus();
    } else if (evt.which === 40 && !$scope.isOpen) {
      evt.preventDefault();
      evt.stopPropagation();
      $scope.$apply(function() {
        $scope.isOpen = true;
      });
    }
  }

  function positionPopup() {
    if ($scope.isOpen) {
      var dpElement = angular.element($popup[0].querySelector('.uib-datepicker-popup'));
      var placement = $attrs.popupPlacement ? $attrs.popupPlacement : datepickerPopupConfig.placement;
      var position = $position.positionElements($element, dpElement, placement, appendToBody);
      dpElement.css({top: position.top + 'px', left: position.left + 'px'});
      if (dpElement.hasClass('uib-position-measure')) {
        dpElement.removeClass('uib-position-measure');
      }
    }
  }

  function extractOptions(ngModelCtrl) {
    var ngModelOptions;

    if (angular.version.minor < 6) { // in angular < 1.6 $options could be missing
      // guarantee a value
      ngModelOptions = angular.isObject(ngModelCtrl.$options) ?
        ngModelCtrl.$options :
        {
          timezone: null
        };

      // mimic 1.6+ api
      ngModelOptions.getOption = function (key) {
        return ngModelOptions[key];
      };
    } else { // in angular >=1.6 $options is always present
      ngModelOptions = ngModelCtrl.$options;
    }

    return ngModelOptions;
  }

  $scope.$on('uib:datepicker.mode', function() {
    $timeout(positionPopup, 0, false);
  });
}])

.directive('uibDatepickerPopup', function() {
  return {
    require: ['ngModel', 'uibDatepickerPopup'],
    controller: 'UibDatepickerPopupController',
    scope: {
      datepickerOptions: '=?',
      isOpen: '=?',
      currentText: '@',
      clearText: '@',
      closeText: '@'
    },
    link: function(scope, element, attrs, ctrls) {
      var ngModel = ctrls[0],
        ctrl = ctrls[1];

      ctrl.init(ngModel);
    }
  };
})

.directive('uibDatepickerPopupWrap', function() {
  return {
    restrict: 'A',
    transclude: true,
    templateUrl: function(element, attrs) {
      return attrs.templateUrl || 'uib/template/datepickerPopup/popup.html';
    }
  };
});
