angular.module('ui.bootstrap.datepicker', ['ui.bootstrap.dateparser', 'ui.bootstrap.isClass'])

.value('$datepickerSuppressError', false)

.value('$datepickerLiteralWarning', true)

.constant('uibDatepickerConfig', {
  datepickerMode: 'day',
  formatDay: 'dd',
  formatMonth: 'MMMM',
  formatYear: 'yyyy',
  formatDayHeader: 'EEE',
  formatDayTitle: 'MMMM yyyy',
  formatMonthTitle: 'yyyy',
  maxDate: null,
  maxMode: 'year',
  minDate: null,
  minMode: 'day',
  monthColumns: 3,
  ngModelOptions: {},
  shortcutPropagation: false,
  showWeeks: true,
  yearColumns: 5,
  yearRows: 4
})

.controller('UibDatepickerController', ['$scope', '$element', '$attrs', '$parse', '$interpolate', '$locale', '$log', 'dateFilter', 'uibDatepickerConfig', '$datepickerLiteralWarning', '$datepickerSuppressError', 'uibDateParser',
  function($scope, $element, $attrs, $parse, $interpolate, $locale, $log, dateFilter, datepickerConfig, $datepickerLiteralWarning, $datepickerSuppressError, dateParser) {
  var self = this,
      ngModelCtrl = { $setViewValue: angular.noop }, // nullModelCtrl;
      ngModelOptions = {},
      watchListeners = [];

  $element.addClass('uib-datepicker');
  $attrs.$set('role', 'application');

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

  // Modes chain
  this.modes = ['day', 'month', 'year'];

  [
    'customClass',
    'dateDisabled',
    'datepickerMode',
    'formatDay',
    'formatDayHeader',
    'formatDayTitle',
    'formatMonth',
    'formatMonthTitle',
    'formatYear',
    'maxDate',
    'maxMode',
    'minDate',
    'minMode',
    'monthColumns',
    'showWeeks',
    'shortcutPropagation',
    'startingDay',
    'yearColumns',
    'yearRows'
  ].forEach(function(key) {
    switch (key) {
      case 'customClass':
      case 'dateDisabled':
        $scope[key] = $scope.datepickerOptions[key] || angular.noop;
        break;
      case 'datepickerMode':
        $scope.datepickerMode = angular.isDefined($scope.datepickerOptions.datepickerMode) ?
          $scope.datepickerOptions.datepickerMode : datepickerConfig.datepickerMode;
        break;
      case 'formatDay':
      case 'formatDayHeader':
      case 'formatDayTitle':
      case 'formatMonth':
      case 'formatMonthTitle':
      case 'formatYear':
        self[key] = angular.isDefined($scope.datepickerOptions[key]) ?
          $interpolate($scope.datepickerOptions[key])($scope.$parent) :
          datepickerConfig[key];
        break;
      case 'monthColumns':
      case 'showWeeks':
      case 'shortcutPropagation':
      case 'yearColumns':
      case 'yearRows':
        self[key] = angular.isDefined($scope.datepickerOptions[key]) ?
          $scope.datepickerOptions[key] : datepickerConfig[key];
        break;
      case 'startingDay':
        if (angular.isDefined($scope.datepickerOptions.startingDay)) {
          self.startingDay = $scope.datepickerOptions.startingDay;
        } else if (angular.isNumber(datepickerConfig.startingDay)) {
          self.startingDay = datepickerConfig.startingDay;
        } else {
          self.startingDay = ($locale.DATETIME_FORMATS.FIRSTDAYOFWEEK + 8) % 7;
        }

        break;
      case 'maxDate':
      case 'minDate':
        $scope.$watch('datepickerOptions.' + key, function(value) {
          if (value) {
            if (angular.isDate(value)) {
              self[key] = dateParser.fromTimezone(new Date(value), ngModelOptions.getOption('timezone'));
            } else {
              if ($datepickerLiteralWarning) {
                $log.warn('Literal date support has been deprecated, please switch to date object usage');
              }

              self[key] = new Date(dateFilter(value, 'medium'));
            }
          } else {
            self[key] = datepickerConfig[key] ?
              dateParser.fromTimezone(new Date(datepickerConfig[key]), ngModelOptions.getOption('timezone')) :
              null;
          }

          self.refreshView();
        });

        break;
      case 'maxMode':
      case 'minMode':
        if ($scope.datepickerOptions[key]) {
          $scope.$watch(function() { return $scope.datepickerOptions[key]; }, function(value) {
            self[key] = $scope[key] = angular.isDefined(value) ? value : $scope.datepickerOptions[key];
            if (key === 'minMode' && self.modes.indexOf($scope.datepickerOptions.datepickerMode) < self.modes.indexOf(self[key]) ||
              key === 'maxMode' && self.modes.indexOf($scope.datepickerOptions.datepickerMode) > self.modes.indexOf(self[key])) {
              $scope.datepickerMode = self[key];
              $scope.datepickerOptions.datepickerMode = self[key];
            }
          });
        } else {
          self[key] = $scope[key] = datepickerConfig[key] || null;
        }

        break;
    }
  });

  $scope.uniqueId = 'datepicker-' + $scope.$id + '-' + Math.floor(Math.random() * 10000);

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

  $scope.isActive = function(dateObject) {
    if (self.compare(dateObject.date, self.activeDate) === 0) {
      $scope.activeDateId = dateObject.uid;
      return true;
    }
    return false;
  };

  this.init = function(ngModelCtrl_) {
    ngModelCtrl = ngModelCtrl_;
    ngModelOptions = extractOptions(ngModelCtrl);

    if ($scope.datepickerOptions.initDate) {
      self.activeDate = dateParser.fromTimezone($scope.datepickerOptions.initDate, ngModelOptions.getOption('timezone')) || new Date();
      $scope.$watch('datepickerOptions.initDate', function(initDate) {
        if (initDate && (ngModelCtrl.$isEmpty(ngModelCtrl.$modelValue) || ngModelCtrl.$invalid)) {
          self.activeDate = dateParser.fromTimezone(initDate, ngModelOptions.getOption('timezone'));
          self.refreshView();
        }
      });
    } else {
      self.activeDate = new Date();
    }

    var date = ngModelCtrl.$modelValue ? new Date(ngModelCtrl.$modelValue) : new Date();
    this.activeDate = !isNaN(date) ?
      dateParser.fromTimezone(date, ngModelOptions.getOption('timezone')) :
      dateParser.fromTimezone(new Date(), ngModelOptions.getOption('timezone'));

    ngModelCtrl.$render = function() {
      self.render();
    };
  };

  this.render = function() {
    if (ngModelCtrl.$viewValue) {
      var date = new Date(ngModelCtrl.$viewValue),
          isValid = !isNaN(date);

      if (isValid) {
        this.activeDate = dateParser.fromTimezone(date, ngModelOptions.getOption('timezone'));
      } else if (!$datepickerSuppressError) {
        $log.error('Datepicker directive: "ng-model" value must be a Date object');
      }
    }
    this.refreshView();
  };

  this.refreshView = function() {
    if (this.element) {
      $scope.selectedDt = null;
      this._refreshView();
      if ($scope.activeDt) {
        $scope.activeDateId = $scope.activeDt.uid;
      }

      var date = ngModelCtrl.$viewValue ? new Date(ngModelCtrl.$viewValue) : null;
      date = dateParser.fromTimezone(date, ngModelOptions.getOption('timezone'));
      ngModelCtrl.$setValidity('dateDisabled', !date ||
        this.element && !this.isDisabled(date));
    }
  };

  this.createDateObject = function(date, format) {
    var model = ngModelCtrl.$viewValue ? new Date(ngModelCtrl.$viewValue) : null;
    model = dateParser.fromTimezone(model, ngModelOptions.getOption('timezone'));
    var today = new Date();
    today = dateParser.fromTimezone(today, ngModelOptions.getOption('timezone'));
    var time = this.compare(date, today);
    var dt = {
      date: date,
      label: dateParser.filter(date, format),
      selected: model && this.compare(date, model) === 0,
      disabled: this.isDisabled(date),
      past: time < 0,
      current: time === 0,
      future: time > 0,
      customClass: this.customClass(date) || null
    };

    if (model && this.compare(date, model) === 0) {
      $scope.selectedDt = dt;
    }

    if (self.activeDate && this.compare(dt.date, self.activeDate) === 0) {
      $scope.activeDt = dt;
    }

    return dt;
  };

  this.isDisabled = function(date) {
    return $scope.disabled ||
      this.minDate && this.compare(date, this.minDate) < 0 ||
      this.maxDate && this.compare(date, this.maxDate) > 0 ||
      $scope.dateDisabled && $scope.dateDisabled({date: date, mode: $scope.datepickerMode});
  };

  this.customClass = function(date) {
    return $scope.customClass({date: date, mode: $scope.datepickerMode});
  };

  // Split array into smaller arrays
  this.split = function(arr, size) {
    var arrays = [];
    while (arr.length > 0) {
      arrays.push(arr.splice(0, size));
    }
    return arrays;
  };

  $scope.select = function(date) {
    if ($scope.datepickerMode === self.minMode) {
      var dt = ngModelCtrl.$viewValue ? dateParser.fromTimezone(new Date(ngModelCtrl.$viewValue), ngModelOptions.getOption('timezone')) : new Date(0, 0, 0, 0, 0, 0, 0);
      dt.setFullYear(date.getFullYear(), date.getMonth(), date.getDate());
      dt = dateParser.toTimezone(dt, ngModelOptions.getOption('timezone'));
      ngModelCtrl.$setViewValue(dt);
      ngModelCtrl.$render();
    } else {
      self.activeDate = date;
      setMode(self.modes[self.modes.indexOf($scope.datepickerMode) - 1]);

      $scope.$emit('uib:datepicker.mode');
    }

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

  $scope.move = function(direction) {
    var year = self.activeDate.getFullYear() + direction * (self.step.years || 0),
        month = self.activeDate.getMonth() + direction * (self.step.months || 0);
    self.activeDate.setFullYear(year, month, 1);
    self.refreshView();
  };

  $scope.toggleMode = function(direction) {
    direction = direction || 1;

    if ($scope.datepickerMode === self.maxMode && direction === 1 ||
      $scope.datepickerMode === self.minMode && direction === -1) {
      return;
    }

    setMode(self.modes[self.modes.indexOf($scope.datepickerMode) + direction]);

    $scope.$emit('uib:datepicker.mode');
  };

  // Key event mapper
  $scope.keys = { 13: 'enter', 32: 'space', 33: 'pageup', 34: 'pagedown', 35: 'end', 36: 'home', 37: 'left', 38: 'up', 39: 'right', 40: 'down' };

  var focusElement = function() {
    self.element[0].focus();
  };

  // Listen for focus requests from popup directive
  $scope.$on('uib:datepicker.focus', focusElement);

  $scope.keydown = function(evt) {
    var key = $scope.keys[evt.which];

    if (!key || evt.shiftKey || evt.altKey || $scope.disabled) {
      return;
    }

    evt.preventDefault();
    if (!self.shortcutPropagation) {
      evt.stopPropagation();
    }

    if (key === 'enter' || key === 'space') {
      if (self.isDisabled(self.activeDate)) {
        return; // do nothing
      }
      $scope.select(self.activeDate);
    } else if (evt.ctrlKey && (key === 'up' || key === 'down')) {
      $scope.toggleMode(key === 'up' ? 1 : -1);
    } else {
      self.handleKeyDown(key, evt);
      self.refreshView();
    }
  };

  $element.on('keydown', function(evt) {
    $scope.$apply(function() {
      $scope.keydown(evt);
    });
  });

  $scope.$on('$destroy', function() {
    //Clear all watch listeners on destroy
    while (watchListeners.length) {
      watchListeners.shift()();
    }
  });

  function setMode(mode) {
    $scope.datepickerMode = mode;
    $scope.datepickerOptions.datepickerMode = mode;
  }

  function extractOptions(ngModelCtrl) {
    var ngModelOptions;

    if (angular.version.minor < 6) { // in angular < 1.6 $options could be missing
      // guarantee a value
      ngModelOptions = ngModelCtrl.$options ||
        $scope.datepickerOptions.ngModelOptions ||
        datepickerConfig.ngModelOptions ||
        {};

      // mimic 1.6+ api
      ngModelOptions.getOption = function (key) {
        return ngModelOptions[key];
      };
    } else { // in angular >=1.6 $options is always present
      // ng-model-options defaults timezone to null; don't let its precedence squash a non-null value
      var timezone = ngModelCtrl.$options.getOption('timezone') ||
        ($scope.datepickerOptions.ngModelOptions ? $scope.datepickerOptions.ngModelOptions.timezone : null) ||
        (datepickerConfig.ngModelOptions ? datepickerConfig.ngModelOptions.timezone : null);

      // values passed to createChild override existing values
      ngModelOptions = ngModelCtrl.$options // start with a ModelOptions instance
        .createChild(datepickerConfig.ngModelOptions) // lowest precedence
        .createChild($scope.datepickerOptions.ngModelOptions)
        .createChild(ngModelCtrl.$options) // highest precedence
        .createChild({timezone: timezone}); // to keep from squashing a non-null value
    }

    return ngModelOptions;
  }
}])

.controller('UibDaypickerController', ['$scope', '$element', 'dateFilter', function(scope, $element, dateFilter) {
  var DAYS_IN_MONTH = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];

  this.step = { months: 1 };
  this.element = $element;
  function getDaysInMonth(year, month) {
    return month === 1 && year % 4 === 0 &&
      (year % 100 !== 0 || year % 400 === 0) ? 29 : DAYS_IN_MONTH[month];
  }

  this.init = function(ctrl) {
    angular.extend(ctrl, this);
    scope.showWeeks = ctrl.showWeeks;
    ctrl.refreshView();
  };

  this.getDates = function(startDate, n) {
    var dates = new Array(n), current = new Date(startDate), i = 0, date;
    while (i < n) {
      date = new Date(current);
      dates[i++] = date;
      current.setDate(current.getDate() + 1);
    }
    return dates;
  };

  this._refreshView = function() {
    var year = this.activeDate.getFullYear(),
      month = this.activeDate.getMonth(),
      firstDayOfMonth = new Date(this.activeDate);

    firstDayOfMonth.setFullYear(year, month, 1);

    var difference = this.startingDay - firstDayOfMonth.getDay(),
      numDisplayedFromPreviousMonth = difference > 0 ?
        7 - difference : - difference,
      firstDate = new Date(firstDayOfMonth);

    if (numDisplayedFromPreviousMonth > 0) {
      firstDate.setDate(-numDisplayedFromPreviousMonth + 1);
    }

    // 42 is the number of days on a six-week calendar
    var days = this.getDates(firstDate, 42);
    for (var i = 0; i < 42; i ++) {
      days[i] = angular.extend(this.createDateObject(days[i], this.formatDay), {
        secondary: days[i].getMonth() !== month,
        uid: scope.uniqueId + '-' + i
      });
    }

    scope.labels = new Array(7);
    for (var j = 0; j < 7; j++) {
      scope.labels[j] = {
        abbr: dateFilter(days[j].date, this.formatDayHeader),
        full: dateFilter(days[j].date, 'EEEE')
      };
    }

    scope.title = dateFilter(this.activeDate, this.formatDayTitle);
    scope.rows = this.split(days, 7);

    if (scope.showWeeks) {
      scope.weekNumbers = [];
      var thursdayIndex = (4 + 7 - this.startingDay) % 7,
          numWeeks = scope.rows.length;
      for (var curWeek = 0; curWeek < numWeeks; curWeek++) {
        scope.weekNumbers.push(
          getISO8601WeekNumber(scope.rows[curWeek][thursdayIndex].date));
      }
    }
  };

  this.compare = function(date1, date2) {
    var _date1 = new Date(date1.getFullYear(), date1.getMonth(), date1.getDate());
    var _date2 = new Date(date2.getFullYear(), date2.getMonth(), date2.getDate());
    _date1.setFullYear(date1.getFullYear());
    _date2.setFullYear(date2.getFullYear());
    return _date1 - _date2;
  };

  function getISO8601WeekNumber(date) {
    var checkDate = new Date(date);
    checkDate.setDate(checkDate.getDate() + 4 - (checkDate.getDay() || 7)); // Thursday
    var time = checkDate.getTime();
    checkDate.setMonth(0); // Compare with Jan 1
    checkDate.setDate(1);
    return Math.floor(Math.round((time - checkDate) / 86400000) / 7) + 1;
  }

  this.handleKeyDown = function(key, evt) {
    var date = this.activeDate.getDate();

    if (key === 'left') {
      date = date - 1;
    } else if (key === 'up') {
      date = date - 7;
    } else if (key === 'right') {
      date = date + 1;
    } else if (key === 'down') {
      date = date + 7;
    } else if (key === 'pageup' || key === 'pagedown') {
      var month = this.activeDate.getMonth() + (key === 'pageup' ? - 1 : 1);
      this.activeDate.setMonth(month, 1);
      date = Math.min(getDaysInMonth(this.activeDate.getFullYear(), this.activeDate.getMonth()), date);
    } else if (key === 'home') {
      date = 1;
    } else if (key === 'end') {
      date = getDaysInMonth(this.activeDate.getFullYear(), this.activeDate.getMonth());
    }
    this.activeDate.setDate(date);
  };
}])

.controller('UibMonthpickerController', ['$scope', '$element', 'dateFilter', function(scope, $element, dateFilter) {
  this.step = { years: 1 };
  this.element = $element;

  this.init = function(ctrl) {
    angular.extend(ctrl, this);
    ctrl.refreshView();
  };

  this._refreshView = function() {
    var months = new Array(12),
        year = this.activeDate.getFullYear(),
        date;

    for (var i = 0; i < 12; i++) {
      date = new Date(this.activeDate);
      date.setFullYear(year, i, 1);
      months[i] = angular.extend(this.createDateObject(date, this.formatMonth), {
        uid: scope.uniqueId + '-' + i
      });
    }

    scope.title = dateFilter(this.activeDate, this.formatMonthTitle);
    scope.rows = this.split(months, this.monthColumns);
    scope.yearHeaderColspan = this.monthColumns > 3 ? this.monthColumns - 2 : 1;
  };

  this.compare = function(date1, date2) {
    var _date1 = new Date(date1.getFullYear(), date1.getMonth());
    var _date2 = new Date(date2.getFullYear(), date2.getMonth());
    _date1.setFullYear(date1.getFullYear());
    _date2.setFullYear(date2.getFullYear());
    return _date1 - _date2;
  };

  this.handleKeyDown = function(key, evt) {
    var date = this.activeDate.getMonth();

    if (key === 'left') {
      date = date - 1;
    } else if (key === 'up') {
      date = date - this.monthColumns;
    } else if (key === 'right') {
      date = date + 1;
    } else if (key === 'down') {
      date = date + this.monthColumns;
    } else if (key === 'pageup' || key === 'pagedown') {
      var year = this.activeDate.getFullYear() + (key === 'pageup' ? - 1 : 1);
      this.activeDate.setFullYear(year);
    } else if (key === 'home') {
      date = 0;
    } else if (key === 'end') {
      date = 11;
    }
    this.activeDate.setMonth(date);
  };
}])

.controller('UibYearpickerController', ['$scope', '$element', 'dateFilter', function(scope, $element, dateFilter) {
  var columns, range;
  this.element = $element;

  function getStartingYear(year) {
    return parseInt((year - 1) / range, 10) * range + 1;
  }

  this.yearpickerInit = function() {
    columns = this.yearColumns;
    range = this.yearRows * columns;
    this.step = { years: range };
  };

  this._refreshView = function() {
    var years = new Array(range), date;

    for (var i = 0, start = getStartingYear(this.activeDate.getFullYear()); i < range; i++) {
      date = new Date(this.activeDate);
      date.setFullYear(start + i, 0, 1);
      years[i] = angular.extend(this.createDateObject(date, this.formatYear), {
        uid: scope.uniqueId + '-' + i
      });
    }

    scope.title = [years[0].label, years[range - 1].label].join(' - ');
    scope.rows = this.split(years, columns);
    scope.columns = columns;
  };

  this.compare = function(date1, date2) {
    return date1.getFullYear() - date2.getFullYear();
  };

  this.handleKeyDown = function(key, evt) {
    var date = this.activeDate.getFullYear();

    if (key === 'left') {
      date = date - 1;
    } else if (key === 'up') {
      date = date - columns;
    } else if (key === 'right') {
      date = date + 1;
    } else if (key === 'down') {
      date = date + columns;
    } else if (key === 'pageup' || key === 'pagedown') {
      date += (key === 'pageup' ? - 1 : 1) * range;
    } else if (key === 'home') {
      date = getStartingYear(this.activeDate.getFullYear());
    } else if (key === 'end') {
      date = getStartingYear(this.activeDate.getFullYear()) + range - 1;
    }
    this.activeDate.setFullYear(date);
  };
}])

.directive('uibDatepicker', function() {
  return {
    templateUrl: function(element, attrs) {
      return attrs.templateUrl || 'uib/template/datepicker/datepicker.html';
    },
    scope: {
      datepickerOptions: '=?'
    },
    require: ['uibDatepicker', '^ngModel'],
    restrict: 'A',
    controller: 'UibDatepickerController',
    controllerAs: 'datepicker',
    link: function(scope, element, attrs, ctrls) {
      var datepickerCtrl = ctrls[0], ngModelCtrl = ctrls[1];

      datepickerCtrl.init(ngModelCtrl);
    }
  };
})

.directive('uibDaypicker', function() {
  return {
    templateUrl: function(element, attrs) {
      return attrs.templateUrl || 'uib/template/datepicker/day.html';
    },
    require: ['^uibDatepicker', 'uibDaypicker'],
    restrict: 'A',
    controller: 'UibDaypickerController',
    link: function(scope, element, attrs, ctrls) {
      var datepickerCtrl = ctrls[0],
        daypickerCtrl = ctrls[1];

      daypickerCtrl.init(datepickerCtrl);
    }
  };
})

.directive('uibMonthpicker', function() {
  return {
    templateUrl: function(element, attrs) {
      return attrs.templateUrl || 'uib/template/datepicker/month.html';
    },
    require: ['^uibDatepicker', 'uibMonthpicker'],
    restrict: 'A',
    controller: 'UibMonthpickerController',
    link: function(scope, element, attrs, ctrls) {
      var datepickerCtrl = ctrls[0],
        monthpickerCtrl = ctrls[1];

      monthpickerCtrl.init(datepickerCtrl);
    }
  };
})

.directive('uibYearpicker', function() {
  return {
    templateUrl: function(element, attrs) {
      return attrs.templateUrl || 'uib/template/datepicker/year.html';
    },
    require: ['^uibDatepicker', 'uibYearpicker'],
    restrict: 'A',
    controller: 'UibYearpickerController',
    link: function(scope, element, attrs, ctrls) {
      var ctrl = ctrls[0];
      angular.extend(ctrl, ctrls[1]);
      ctrl.yearpickerInit();

      ctrl.refreshView();
    }
  };
});
