// -- 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.
// ++


import {opServicesModule} from "../../../angular-modules";

var $filter: ng.IFilterService;
var I18n: op.I18n;
var TimezoneService: any;
var currencyFilter: any;

export class SingleViewWorkPackage {
  constructor(protected workPackage: any) {
  }

  public isSingleField(field) {
    return angular.isString(field);
  };

  public canHideField(field) {
    var attrVisibility = this.getVisibility(field);
    var notRequired = !this.isRequired(field) || this.hasDefault(field);
    var empty = this.isEmpty(field);
    var visible = attrVisibility == 'visible';
    var hidden = attrVisibility == 'hidden';

    if (this.workPackage.isNew === true) {
      return notRequired && hidden;
    }

    return notRequired && !visible && (empty || hidden);
  }

  public getVisibility(field) {
    var schema = this.workPackage.schema;
    var prop = schema && schema[field];

    return prop && prop.visibility;
  }

  public isRequired(field) {
    var schema = this.workPackage.schema;

    if (_.isUndefined(schema[field])) {
      return false;
    }

    return schema[field].required;
  }

  public hasDefault(field) {
    var schema = this.workPackage.schema;

    if (_.isUndefined(schema[field])) {
      return false;
    }

    return schema[field].hasDefault;
  }

  public isEmpty(field) {
    var value = this.format(field);
    if (!value ||
      (value.format && !value.html) ||
      (field === 'spentTime' && this.workPackage[field] === 'PT0S')) {

      return true;
    }

    if (value.$embedded && _.isArray(value.$embedded.elements)) {
      return value.$embedded.elements.length === 0;
    }

    return false;
  }

  public format(field) {
    var schema = this.workPackage.schema;

    var value = this.workPackage[field];
    if (_.isUndefined(value)) {
      return this.getValue(field);
    }

    if (value === null) {
      return null;
    }

    var fieldMapping = {
        dueDate: 'date',
        startDate: 'date',
        createdAt: 'datetime',
        updatedAt: 'datetime'
      }[field] || schema[field] && schema[field].type;

    switch (fieldMapping) {
      case('Duration'):
        var hours = moment.duration(value).asHours();
        var formattedHours = $filter('number')(hours, 2);
        return I18n.t('js.units.hour', {count: formattedHours});
      case('Boolean'):
        return value ? I18n.t('js.general_text_yes') : I18n.t('js.general_text_no');
      case('Date'):
        return value;
      case('Float'):
        return $filter('number')(value);
      default:
        return this.formatValue(value, fieldMapping);
    }
  }

  public isEditable(field) {
    // no form - no editing
    if (!this.workPackage.form) {
      return false;
    }
    var schema = this.workPackage.schema;
    var isWritable = schema[field].writable;

    if (isWritable && schema[field].$links && this.getLinkedAllowedValues(field)) {
      isWritable = this.getEmbeddedAllowedValues(field).length > 0;
    }

    return isWritable;
  }

  public getLinkedAllowedValues(field) {
    return _.isArray(this.workPackage.schema[field].$links.allowedValues);
  }

  public getEmbeddedAllowedValues(field) {
    return this.workPackage.schema[field].$embedded.allowedValues;
  }

  public getValue(field) {
    if (field === 'date') {
      if (this.isMilestone()) {
        return this.workPackage['dueDate'];
      }
      return {
        startDate: this.workPackage['startDate'],
        dueDate: this.workPackage['dueDate']
      };
    }
    if (!_.isUndefined(this.workPackage[field])) {
      return this.workPackage[field];
    }
    if (this.isEmbedded(field)) {
      return this.workPackage.$embedded[field];
    }

    if (this.workPackage.$links[field] && this.workPackage.$links[field].$link.href !== null) {
      return this.workPackage.$links[field];
    }

    return null;
  }

  public isMilestone() {
    var formAvailable = !_.isUndefined(this.workPackage.form);
    if (formAvailable) {
      var allowedValues = this.workPackage.schema.type.allowedValues;
      var currentType = this.workPackage.$links.type.$link.href;

      return _.some(allowedValues, (allowedValue: any) => {
        return allowedValue.href === currentType && allowedValue.isMilestone;
      });
    }

    return this.workPackage.type.isMilestone;
  }

  public isEmbedded(field) {
    return !_.isUndefined(this.workPackage.$embedded[field]);
  }

  public getLabel(field) {
    if (field === 'date') {
      return I18n.t('js.work_packages.properties.date');
    }

    return this.workPackage.schema[field].name;
  }

  public isSpecified(field) {
    return !_.isUndefined(this.workPackage.schema[field]);
  }

  public hasNiceStar(field) {
    return this.isRequired(field) && this.isEditable(field);
  }

  public isGroupHideable(groupedFields, groupName) {
    var group: any = _.find(groupedFields, {groupName: groupName});

    return group.attributes.length === 0 || _.every(group.attributes, (field) => {
        return this.canHideField(field);
      });
  }

  public isGroupEmpty(groupedFields, groupName) {
    var group: any = _.find(groupedFields, {groupName: groupName});

    return group.attributes.length === 0;
  }

  public shouldHideGroup(hideEmptyActive, groupedFields, groupName) {
    return hideEmptyActive && this.isGroupHideable(groupedFields, groupName) ||
      !hideEmptyActive && this.isGroupEmpty(groupedFields, groupName);
  }

  public shouldHideField(field, hideEmptyFields) {
    var hidden = this.getVisibility(field) === 'hidden';

    return this.canHideField(field) && (hideEmptyFields || hidden);
  }

  protected formatValue(value, dataType) {
    switch (dataType) {
      case 'datetime':
        var dateTime;
        if (value) {
          dateTime = TimezoneService.formattedDatetime(value);
        }
        return dateTime || '';
      case 'date':
        return value ? TimezoneService.formattedDate(value) : '';
      case 'currency':
        return currencyFilter(value, 'EUR ');
      case 'Duration':
        return TimezoneService.formattedDuration(value);
      case 'DateTime':
        return TimezoneService.formattedDatetime(value);
      case 'Date':
        return TimezoneService.formattedDate(value);
      default:
        return value;
    }
  }
}

function singleViewWpService(_$filter_, _I18n_, _TimezoneService, _currencyFilter_) {
  $filter = _$filter_;
  I18n = _I18n_;
  TimezoneService = _TimezoneService;
  currencyFilter = _currencyFilter_;

  return SingleViewWorkPackage;
}

opServicesModule.factory('SingleViewWorkPackage', [
  '$filter',
  'I18n',
  'TimezoneService',
  'currencyFilter',
  singleViewWpService
]);