/*
 * This file is part of the TYPO3 CMS project.
 *
 * It is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License, either version 2
 * of the License, or any later version.
 *
 * For the full copyright and license information, please read the
 * LICENSE.txt file that was distributed with this source code.
 *
 * The TYPO3 project - inspiring people to share!
 */

import AjaxRequest = require('TYPO3/CMS/Core/Ajax/AjaxRequest');
import {MessageUtility} from '../../Utility/MessageUtility';
import {AjaxDispatcher} from './../InlineRelation/AjaxDispatcher';
import {InlineResponseInterface} from './../InlineRelation/InlineResponseInterface';
import DocumentService = require('TYPO3/CMS/Core/DocumentService');
import NProgress = require('nprogress');
import Sortable = require('Sortable');
import FormEngine = require('TYPO3/CMS/Backend/FormEngine');
import FormEngineValidation = require('TYPO3/CMS/Backend/FormEngineValidation');
import Icons = require('../../Icons');
import InfoWindow = require('../../InfoWindow');
import Modal = require('../../Modal');
import Notification = require('../../Notification');
import RegularEvent = require('TYPO3/CMS/Core/Event/RegularEvent');
import Severity = require('../../Severity');
import Utility = require('../../Utility');

enum Selectors {
  toggleSelector = '[data-bs-toggle="formengine-inline"]',
  controlSectionSelector = '.t3js-formengine-irre-control',
  createNewRecordButtonSelector = '.t3js-create-new-button',
  createNewRecordBySelectorSelector = '.t3js-create-new-selector',
  deleteRecordButtonSelector = '.t3js-editform-delete-inline-record',
  enableDisableRecordButtonSelector = '.t3js-toggle-visibility-button',
  infoWindowButton = '[data-action="infowindow"]',
  synchronizeLocalizeRecordButtonSelector = '.t3js-synchronizelocalize-button',
  uniqueValueSelectors = 'select.t3js-inline-unique',
  revertUniqueness = '.t3js-revert-unique',
  controlContainer = '.t3js-inline-controls',
}

enum States {
  new = 'inlineIsNewRecord',
  visible = 'panel-visible',
  collapsed = 'panel-collapsed',
  notLoaded = 't3js-not-loaded',
}

enum Separators {
  structureSeparator = '-',
}

enum SortDirections {
  DOWN = 'down',
  UP = 'up',
}

interface RequestQueue {
  [key: string]: AjaxRequest;
}

interface ProgressQueue {
  [key: string]: any;
}

interface Appearance {
  expandSingle?: boolean;
  useSortable?: boolean;
}

interface UniqueDefinition {
  elTable: string;
  field: string;
  max: number;
  possible: { [key: string]: string };
  selector: string;
  table: string;
  type: string;
  used: UniqueDefinitionCollection;
}

interface UniqueDefinitionCollection {
  [key: string]: UniqueDefinitionUsed;
}

interface UniqueDefinitionUsed {
  table: string;
  uid: string | number;
}

class InlineControlContainer {
  private container: HTMLElement = null;
  private ajaxDispatcher: AjaxDispatcher = null;
  private appearance: Appearance = null;
  private requestQueue: RequestQueue = {};
  private progessQueue: ProgressQueue = {};
  private noTitleString: string = (TYPO3.lang ? TYPO3.lang['FormEngine.noRecordTitle'] : '[No title]');

  /**
   * @param {string} objectId
   * @return HTMLDivElement
   */
  private static getInlineRecordContainer(objectId: string): HTMLDivElement {
    return <HTMLDivElement>document.querySelector('[data-object-id="' + objectId + '"]');
  }

  /**
   * @param {string} objectId
   * @return HTMLButtonElement
   */
  private static getCollapseButton(objectId: string): HTMLButtonElement {
    return <HTMLButtonElement>document.querySelector('[aria-controls="' + objectId + '_fields"]');
  }

  /**
   * @param {string} objectId
   */
  private static toggleElement(objectId: string): void {
    const recordContainer = InlineControlContainer.getInlineRecordContainer(objectId);
    if (recordContainer.classList.contains(States.collapsed)) {
      InlineControlContainer.expandElement(recordContainer, objectId);
    } else {
      InlineControlContainer.collapseElement(recordContainer, objectId);
    }
  }

  /**
   * @param {HTMLDivElement} recordContainer
   * @param {string} objectId
   */
  private static collapseElement(recordContainer: HTMLDivElement, objectId: string): void {
    const collapseButton = InlineControlContainer.getCollapseButton(objectId);
    recordContainer.classList.remove(States.visible);
    recordContainer.classList.add(States.collapsed);
    collapseButton.setAttribute('aria-expanded', 'false');
  }

  /**
   * @param {HTMLDivElement} recordContainer
   * @param {string} objectId
   */
  private static expandElement(recordContainer: HTMLDivElement, objectId: string): void {
    const collapseButton = InlineControlContainer.getCollapseButton(objectId);
    recordContainer.classList.remove(States.collapsed);
    recordContainer.classList.add(States.visible);
    collapseButton.setAttribute('aria-expanded', 'true');
  }

  /**
   * @param {string} objectId
   * @return boolean
   */
  private static isNewRecord(objectId: string): boolean {
    const recordContainer = InlineControlContainer.getInlineRecordContainer(objectId);
    return recordContainer.classList.contains(States.new);
  }

  /**
   * @param {string} objectId
   * @param {boolean} value
   */
  private static updateExpandedCollapsedStateLocally(objectId: string, value: boolean): void {
    const recordContainer = InlineControlContainer.getInlineRecordContainer(objectId);

    const ucName = 'uc[inlineView]'
      + '[' + recordContainer.dataset.topmostParentTable + ']'
      + '[' + recordContainer.dataset.topmostParentUid + ']'
      + recordContainer.dataset.fieldName;
    const ucFormObj = document.getElementsByName(ucName);

    if (ucFormObj.length) {
      (<HTMLInputElement>ucFormObj[0]).value = value ? '1' : '0';
    }
  }

  /**
   * @param {UniqueDefinitionCollection} hashmap
   */
  private static getValuesFromHashMap(hashmap: UniqueDefinitionCollection): Array<any> {
    return Object.keys(hashmap).map((key: string) => hashmap[key]);
  }

  private static selectOptionValueExists(selectElement: HTMLSelectElement, value: string): boolean {
    return selectElement.querySelector('option[value="' + value + '"]') !== null;
  }

  /**
   * @param {HTMLSelectElement} selectElement
   * @param {string} value
   */
  private static removeSelectOptionByValue(selectElement: HTMLSelectElement, value: string): void {
    const option = selectElement.querySelector('option[value="' + value + '"]');
    if (option !== null) {
      option.remove();
    }
  }

  /**
   * @param {HTMLSelectElement} selectElement
   * @param {string} value
   * @param {UniqueDefinition} unique
   */
  private static reAddSelectOption(selectElement: HTMLSelectElement, value: string, unique: UniqueDefinition): void {
    if (InlineControlContainer.selectOptionValueExists(selectElement, value)) {
      return;
    }

    const options: NodeListOf<HTMLOptionElement> = selectElement.querySelectorAll('option');
    let index: number = -1;

    for (let possibleValue of Object.keys(unique.possible)) {
      if (possibleValue === value) {
        break;
      }

      for (let k = 0; k < options.length; ++k) {
        const option = options[k];
        if (option.value === possibleValue) {
          index = k;
          break;
        }
      }
    }

    if (index === -1) {
      index = 0;
    } else if (index < options.length) {
      index++;
    }
    // recreate the <option> tag
    const readdOption = document.createElement('option');
    readdOption.text = unique.possible[value];
    readdOption.value = value;
    // add the <option> at the right position
    selectElement.insertBefore(readdOption, selectElement.options[index]);
  }

  /**
   * @param {string} elementId
   */
  constructor(elementId: string) {
    DocumentService.ready().then((document: Document): void => {
      this.container = <HTMLElement>document.getElementById(elementId);
      this.ajaxDispatcher = new AjaxDispatcher(this.container.dataset.objectGroup);

      this.registerEvents();
    });
  }

  private registerEvents(): void {
    this.registerInfoButton();
    this.registerSort();
    this.registerCreateRecordButton();
    this.registerEnableDisableButton();
    this.registerDeleteButton();
    this.registerSynchronizeLocalize();
    this.registerRevertUniquenessAction();
    this.registerToggle();

    this.registerCreateRecordBySelector();
    this.registerUniqueSelectFieldChanged();

    new RegularEvent('message', this.handlePostMessage).bindTo(window);

    if (this.getAppearance().useSortable) {
      const recordListContainer = <HTMLDivElement>document.getElementById(this.container.getAttribute('id') + '_records');
      // tslint:disable-next-line:no-unused-expression
      new Sortable(recordListContainer, {
        group: recordListContainer.getAttribute('id'),
        handle: '.sortableHandle',
        onSort: (): void => {
          this.updateSorting();
        },
      });
    }
  }

  private registerToggle(): void {
    const me = this;
    new RegularEvent('click', function(this: HTMLElement, e: Event) {
      e.preventDefault();
      e.stopImmediatePropagation();

      me.loadRecordDetails(this.closest(Selectors.toggleSelector).parentElement.dataset.objectId);
    }).delegateTo(this.container, `${Selectors.toggleSelector} .form-irre-header-cell:not(${Selectors.controlSectionSelector}`);
  }

  private registerSort(): void {
    const me = this;
    new RegularEvent('click', function(this: HTMLElement, e: Event) {
      e.preventDefault();
      e.stopImmediatePropagation();

      me.changeSortingByButton(
        (<HTMLDivElement>this.closest('[data-object-id]')).dataset.objectId,
        <SortDirections>this.dataset.direction,
      );
    }).delegateTo(this.container, Selectors.controlSectionSelector + ' [data-action="sort"]');
  }

  private registerCreateRecordButton(): void {
    const me = this;
    new RegularEvent('click', function(this: HTMLElement, e: Event) {
      e.preventDefault();
      e.stopImmediatePropagation();

      if (me.isBelowMax()) {
        let objectId = me.container.dataset.objectGroup;
        if (typeof this.dataset.recordUid !== 'undefined') {
          objectId += Separators.structureSeparator + this.dataset.recordUid;
        }

        me.importRecord([objectId, (me.container.querySelector(Selectors.createNewRecordBySelectorSelector) as HTMLInputElement)?.value], this.dataset.recordUid ?? null);
      }
    }).delegateTo(this.container, Selectors.createNewRecordButtonSelector);
  }

  private registerCreateRecordBySelector(): void {
    const me = this;
    new RegularEvent('change', function(this: HTMLElement, e: Event) {
      e.preventDefault();
      e.stopImmediatePropagation();

      const selectTarget = <HTMLSelectElement>this;
      const recordUid = selectTarget.options[selectTarget.selectedIndex].getAttribute('value');

      me.importRecord([me.container.dataset.objectGroup, recordUid]);
    }).delegateTo(this.container, Selectors.createNewRecordBySelectorSelector);
  }

  /**
   * @param {MessageEvent} e
   */
  private handlePostMessage = (e: MessageEvent): void => {
    if (!MessageUtility.verifyOrigin(e.origin)) {
      throw 'Denied message sent by ' + e.origin;
    }

    if (e.data.actionName === 'typo3:foreignRelation:insert') {
      if (typeof e.data.objectGroup === 'undefined') {
        throw 'No object group defined for message';
      }

      if (e.data.objectGroup !== this.container.dataset.objectGroup) {
        // Received message isn't provisioned for current InlineControlContainer instance
        return;
      }

      if (this.isUniqueElementUsed(parseInt(e.data.uid, 10), e.data.table)) {
        Notification.error('There is already a relation to the selected element');
        return;
      }

      this.importRecord([e.data.objectGroup, e.data.uid]).then((): void => {
        if (e.source) {
          const message = {
            actionName: 'typo3:foreignRelation:inserted',
            objectGroup: e.data.objectId,
            table: e.data.table,
            uid: e.data.uid,
          };
          MessageUtility.send(message, e.source as Window);
        }
      });
    } else {
      console.warn(`Unhandled action "${e.data.actionName}"`);
    }
  }

  /**
   * @param {string} uid
   * @param {string} markup
   * @param {string} afterUid
   * @param {string} selectedValue
   */
  private createRecord(uid: string, markup: string, afterUid: string = null, selectedValue: string = null): void {
    let objectId = this.container.dataset.objectGroup;
    if (afterUid !== null) {
      objectId += Separators.structureSeparator + afterUid;
    }

    if (afterUid !== null) {
      InlineControlContainer.getInlineRecordContainer(objectId).insertAdjacentHTML('afterend', markup);
      this.memorizeAddRecord(uid, afterUid, selectedValue);
    } else {
      document.getElementById(this.container.getAttribute('id') + '_records').insertAdjacentHTML('beforeend', markup);
      this.memorizeAddRecord(uid, null, selectedValue);
    }
  }

  /**
   * @param {Array} params
   * @param {string} afterUid
   */
  private async importRecord(params: Array<any>, afterUid?: string): Promise<void> {
    return this.ajaxDispatcher.send(
      this.ajaxDispatcher.newRequest(this.ajaxDispatcher.getEndpoint('record_inline_create')),
      params,
    ).then(async (response: InlineResponseInterface): Promise<void> => {
      if (this.isBelowMax()) {
        this.createRecord(
          response.compilerInput.uid,
          response.data,
          typeof afterUid !== 'undefined' ? afterUid : null,
          typeof response.compilerInput.childChildUid !== 'undefined' ? response.compilerInput.childChildUid : null,
        );

        FormEngine.reinitialize();
        FormEngine.Validation.initializeInputFields();
        FormEngine.Validation.validate();
      }
    });
  }

  private registerEnableDisableButton(): void {
    new RegularEvent('click', (e: Event, target: HTMLElement): void => {
      e.preventDefault();
      e.stopImmediatePropagation();

      const objectId = (<HTMLDivElement>target.closest('[data-object-id]')).dataset.objectId;
      const recordContainer = InlineControlContainer.getInlineRecordContainer(objectId);
      const hiddenFieldName = 'data' + recordContainer.dataset.fieldName + '[' + target.dataset.hiddenField + ']';
      const hiddenValueCheckBox = <HTMLInputElement>document.querySelector('[data-formengine-input-name="' + hiddenFieldName + '"');
      const hiddenValueInput = <HTMLInputElement>document.querySelector('[name="' + hiddenFieldName + '"');

      if (hiddenValueCheckBox !== null && hiddenValueInput !== null) {
        hiddenValueCheckBox.checked = !hiddenValueCheckBox.checked;
        hiddenValueInput.value = hiddenValueCheckBox.checked ? '1' : '0';
        TBE_EDITOR.fieldChanged(this.container.dataset.localTable, this.container.dataset.uid, this.container.dataset.localField, hiddenFieldName);
      }

      const hiddenClass = 't3-form-field-container-inline-hidden';
      const isHidden = recordContainer.classList.contains(hiddenClass);
      let toggleIcon: string;

      if (isHidden) {
        toggleIcon = 'actions-edit-hide';
        recordContainer.classList.remove(hiddenClass);
      } else {
        toggleIcon = 'actions-edit-unhide';
        recordContainer.classList.add(hiddenClass);
      }

      Icons.getIcon(toggleIcon, Icons.sizes.small).then((markup: string): void => {
        target.replaceChild(document.createRange().createContextualFragment(markup), target.querySelector('.t3js-icon'));
      });
    }).delegateTo(this.container, Selectors.enableDisableRecordButtonSelector);
  }

  private registerInfoButton(): void {
    new RegularEvent('click', function(this: HTMLElement, e: Event) {
      e.preventDefault();
      e.stopImmediatePropagation();

      InfoWindow.showItem(this.dataset.infoTable, this.dataset.infoUid);
    }).delegateTo(this.container, Selectors.infoWindowButton);
  }

  private registerDeleteButton(): void {
    const me = this;
    new RegularEvent('click', function(this: HTMLElement, e: Event) {
      e.preventDefault();
      e.stopImmediatePropagation();

      const title = TYPO3.lang['label.confirm.delete_record.title'] || 'Delete this record?';
      const content = TYPO3.lang['label.confirm.delete_record.content'] || 'Are you sure you want to delete this record?';
      const $modal = Modal.confirm(title, content, Severity.warning, [
        {
          text: TYPO3.lang['buttons.confirm.delete_record.no'] || 'Cancel',
          active: true,
          btnClass: 'btn-default',
          name: 'no',
        },
        {
          text: TYPO3.lang['buttons.confirm.delete_record.yes'] || 'Yes, delete this record',
          btnClass: 'btn-warning',
          name: 'yes',
        },
      ]);
      $modal.on('button.clicked', (modalEvent: Event): void => {
        if ((<HTMLAnchorElement>modalEvent.target).name === 'yes') {
          const objectId = (<HTMLDivElement>this.closest('[data-object-id]')).dataset.objectId;
          me.deleteRecord(objectId);
        }

        Modal.dismiss();
      });
    }).delegateTo(this.container, Selectors.deleteRecordButtonSelector);
  }

  /**
   * @param {Event} e
   */
  private registerSynchronizeLocalize(): void {
    const me = this;
    new RegularEvent('click', function(this: HTMLElement, e: Event) {
      e.preventDefault();
      e.stopImmediatePropagation();

      me.ajaxDispatcher.send(
        me.ajaxDispatcher.newRequest(me.ajaxDispatcher.getEndpoint('record_inline_synchronizelocalize')),
        [me.container.dataset.objectGroup, this.dataset.type],
      ).then(async (response: InlineResponseInterface): Promise<any> => {
        document.getElementById(me.container.getAttribute('id') + '_records').insertAdjacentHTML('beforeend', response.data);

        const objectIdPrefix = me.container.dataset.objectGroup + Separators.structureSeparator;
        for (let itemUid of response.compilerInput.delete) {
          me.deleteRecord(objectIdPrefix + itemUid, true);
        }

        for (let item of Object.values(response.compilerInput.localize)) {
          if (typeof item.remove !== 'undefined') {
            const removableRecordContainer = InlineControlContainer.getInlineRecordContainer(objectIdPrefix + item.remove);
            removableRecordContainer.parentElement.removeChild(removableRecordContainer);
          }

          me.memorizeAddRecord(item.uid, null, item.selectedValue);
        }
      });
    }).delegateTo(this.container, Selectors.synchronizeLocalizeRecordButtonSelector);
  }

  private registerUniqueSelectFieldChanged(): void {
    const me = this;
    new RegularEvent('change', function(this: HTMLElement, e: Event) {
      e.preventDefault();
      e.stopImmediatePropagation();

      const recordContainer = (<HTMLDivElement>this.closest('[data-object-id]'));
      if (recordContainer !== null) {
        const objectId = recordContainer.dataset.objectId;
        const objectUid = recordContainer.dataset.objectUid;
        me.handleChangedField(<HTMLSelectElement>this, objectId);

        const formField = me.getFormFieldForElements();
        if (formField === null) {
          return;
        }
        me.updateUnique(<HTMLSelectElement>this, formField, objectUid);
      }
    }).delegateTo(this.container, Selectors.uniqueValueSelectors);
  }

  private registerRevertUniquenessAction(): void {
    const me = this;
    new RegularEvent('click', function(this: HTMLElement, e: Event) {
      e.preventDefault();
      e.stopImmediatePropagation();

      me.revertUnique(this.dataset.uid);
    }).delegateTo(this.container, Selectors.revertUniqueness);
  }

  /**
   * @param {string} objectId
   */
  private loadRecordDetails(objectId: string): void {
    const recordFieldsContainer = document.getElementById(objectId + '_fields');
    const recordContainer = InlineControlContainer.getInlineRecordContainer(objectId);
    const isLoading = typeof this.requestQueue[objectId] !== 'undefined';
    const isLoaded = recordFieldsContainer !== null && !recordContainer.classList.contains(States.notLoaded);

    if (!isLoaded) {
      const progress = this.getProgress(objectId, recordContainer.dataset.objectIdHash);

      if (!isLoading) {
        const ajaxRequest = this.ajaxDispatcher.newRequest(this.ajaxDispatcher.getEndpoint('record_inline_details'));
        const request = this.ajaxDispatcher.send(ajaxRequest, [objectId]);

        request.then(async (response: InlineResponseInterface): Promise<any> => {
          delete this.requestQueue[objectId];
          delete this.progessQueue[objectId];

          recordContainer.classList.remove(States.notLoaded);
          recordFieldsContainer.innerHTML = response.data;
          this.collapseExpandRecord(objectId);

          progress.done();

          FormEngine.reinitialize();
          FormEngine.Validation.initializeInputFields();
          FormEngine.Validation.validate();

          if (this.hasObjectGroupDefinedUniqueConstraints()) {
            const recordContainer = InlineControlContainer.getInlineRecordContainer(objectId);
            this.removeUsed(recordContainer);
          }
        });

        this.requestQueue[objectId] = ajaxRequest;
        progress.start();
      } else {
        // Abort loading if collapsed again
        this.requestQueue[objectId].abort();
        delete this.requestQueue[objectId];
        delete this.progessQueue[objectId];
        progress.done();
      }

      return;
    }

    this.collapseExpandRecord(objectId);
  }

  /**
   * Collapses or expands a record and stores the state either in a form field or directly in backend user's UC, depending
   * on whether the record is new or already existing.
   *
   * @param {String} objectId
   */
  private collapseExpandRecord(objectId: string): void {
    const recordElement = InlineControlContainer.getInlineRecordContainer(objectId);
    const expandSingle = this.getAppearance().expandSingle === true;
    const isCollapsed: boolean = recordElement.classList.contains(States.collapsed);
    let collapse: Array<string> = [];
    const expand: Array<string> = [];

    if (expandSingle && isCollapsed) {
      collapse = this.collapseAllRecords(recordElement.dataset.objectUid);
    }

    InlineControlContainer.toggleElement(objectId);

    if (InlineControlContainer.isNewRecord(objectId)) {
      InlineControlContainer.updateExpandedCollapsedStateLocally(objectId, isCollapsed);
    } else if (isCollapsed) {
      expand.push(recordElement.dataset.objectUid);
    } else if (!isCollapsed) {
      collapse.push(recordElement.dataset.objectUid);
    }

    this.ajaxDispatcher.send(
      this.ajaxDispatcher.newRequest(this.ajaxDispatcher.getEndpoint('record_inline_expandcollapse')),
      [objectId, expand.join(','), collapse.join(',')]
    );
  }

  /**
   * @param {string} newUid
   * @param {string} afterUid
   * @param {string} selectedValue
   */
  private memorizeAddRecord(newUid: string, afterUid: string = null, selectedValue: string = null): void {
    const formField = this.getFormFieldForElements();
    if (formField === null) {
      return;
    }

    let records = Utility.trimExplode(',', (<HTMLInputElement>formField).value);
    if (afterUid) {
      const newRecords = [];
      for (let i = 0; i < records.length; i++) {
        if (records[i].length) {
          newRecords.push(records[i]);
        }
        if (afterUid === records[i]) {
          newRecords.push(newUid);
        }
      }
      records = newRecords;
    } else {
      records.push(newUid);
    }

    (<HTMLInputElement>formField).value = records.join(',');
    (<HTMLInputElement>formField).classList.add('has-change');
    document.dispatchEvent(new Event('change'));

    this.redrawSortingButtons(this.container.dataset.objectGroup, records);
    this.setUnique(newUid, selectedValue);

    if (!this.isBelowMax()) {
      this.toggleContainerControls(false);
    }

    TBE_EDITOR.fieldChanged(this.container.dataset.localTable, this.container.dataset.uid, this.container.dataset.localField, formField);
  }

  /**
   * @param {String} objectUid
   * @return Array<string>
   */
  private memorizeRemoveRecord(objectUid: string): Array<string> {
    const formField = this.getFormFieldForElements();
    if (formField === null) {
      return [];
    }

    let records = Utility.trimExplode(',', (<HTMLInputElement>formField).value);
    const indexOfRemoveUid = records.indexOf(objectUid);
    if (indexOfRemoveUid > -1) {
      delete records[indexOfRemoveUid];

      (<HTMLInputElement>formField).value = records.join(',');
      (<HTMLInputElement>formField).classList.add('has-change');
      document.dispatchEvent(new Event('change'));

      this.redrawSortingButtons(this.container.dataset.objectGroup, records);
    }

    return records;
  }

  /**
   * @param {string} objectId
   * @param {SortDirections} direction
   */
  private changeSortingByButton(objectId: string, direction: SortDirections): void {
    const currentRecordContainer = InlineControlContainer.getInlineRecordContainer(objectId);
    const recordUid = currentRecordContainer.dataset.objectUid;
    const recordListContainer = <HTMLDivElement>document.getElementById(this.container.getAttribute('id') + '_records');
    const records = Array.from(recordListContainer.children).map((child: HTMLElement) => child.dataset.objectUid);
    let position = records.indexOf(recordUid);
    let isChanged = false;

    if (direction === SortDirections.UP && position > 0) {
      records[position] = records[position - 1];
      records[position - 1] = recordUid;
      isChanged = true;
    } else if (direction === SortDirections.DOWN && position < records.length - 1) {
      records[position] = records[position + 1];
      records[position + 1] = recordUid;
      isChanged = true;
    }

    if (isChanged) {
      const objectIdPrefix = this.container.dataset.objectGroup + Separators.structureSeparator;
      const adjustment = direction === SortDirections.UP ? 1 : 0;
      currentRecordContainer.parentElement.insertBefore(
        InlineControlContainer.getInlineRecordContainer(objectIdPrefix + records[position - adjustment]),
        InlineControlContainer.getInlineRecordContainer(objectIdPrefix + records[position + 1 - adjustment]),
      );

      this.updateSorting();
    }
  }

  private updateSorting(): void {
    const formField = this.getFormFieldForElements();
    if (formField === null) {
      return;
    }

    const recordListContainer = <HTMLDivElement>document.getElementById(this.container.getAttribute('id') + '_records');
    const records = Array.from(recordListContainer.querySelectorAll('[data-placeholder-record="0"]')).map((child: HTMLElement) => child.dataset.objectUid);

    (<HTMLInputElement>formField).value = records.join(',');
    (<HTMLInputElement>formField).classList.add('has-change');
    document.dispatchEvent(new Event('inline:sorting-changed'));
    document.dispatchEvent(new Event('change'));

    this.redrawSortingButtons(this.container.dataset.objectGroup, records);
  }

  /**
   * @param {String} objectId
   * @param {Boolean} forceDirectRemoval
   */
  private deleteRecord(objectId: string, forceDirectRemoval: boolean = false): void {
    const recordContainer = InlineControlContainer.getInlineRecordContainer(objectId);
    const objectUid = recordContainer.dataset.objectUid;

    recordContainer.classList.add('t3js-inline-record-deleted');

    if (!InlineControlContainer.isNewRecord(objectId) && !forceDirectRemoval) {
      const deleteCommandInput = this.container.querySelector('[name="cmd' + recordContainer.dataset.fieldName + '[delete]"]');
      deleteCommandInput.removeAttribute('disabled');

      // Move input field to inline container so we can remove the record container
      recordContainer.parentElement.insertAdjacentElement('afterbegin', deleteCommandInput);
    }

    new RegularEvent('transitionend', (): void => {
      recordContainer.parentElement.removeChild(recordContainer);
      FormEngineValidation.validate();
    }).bindTo(recordContainer);

    this.revertUnique(objectUid);
    this.memorizeRemoveRecord(objectUid);
    recordContainer.classList.add('form-irre-object--deleted');

    if (this.isBelowMax()) {
      this.toggleContainerControls(true);
    }
  }

  /**
   * @param {boolean} visible
   */
  private toggleContainerControls(visible: boolean): void {
    const controlContainer = this.container.querySelector(Selectors.controlContainer);
    const controlContainerButtons = controlContainer.querySelectorAll('a');
    controlContainerButtons.forEach((button: HTMLElement): void => {
      button.style.display = visible ? null : 'none';
    });
  }

  /**
   * @param {string} objectId
   * @param {string} objectIdHash
   */
  private getProgress(objectId: string, objectIdHash: string): any {
    const headerIdentifier = '#' + objectIdHash + '_header';
    let progress: any;

    if (typeof this.progessQueue[objectId] !== 'undefined') {
      progress = this.progessQueue[objectId];
    } else {
      progress = NProgress;
      progress.configure({parent: headerIdentifier, showSpinner: false});
      this.progessQueue[objectId] = progress;
    }

    return progress;
  }

  /**
   * @param {string} excludeUid
   */
  private collapseAllRecords(excludeUid: string): Array<string> {
    const formField = this.getFormFieldForElements();
    const collapse: Array<string> = [];

    if (formField !== null) {
      const records = Utility.trimExplode(',', (<HTMLInputElement>formField).value);
      for (let recordUid of records) {
        if (recordUid === excludeUid) {
          continue;
        }

        const recordObjectId = this.container.dataset.objectGroup + Separators.structureSeparator + recordUid;
        const recordContainer = InlineControlContainer.getInlineRecordContainer(recordObjectId);
        if (recordContainer.classList.contains(States.visible)) {
          InlineControlContainer.collapseElement(recordContainer, recordObjectId);

          if (InlineControlContainer.isNewRecord(recordObjectId)) {
            InlineControlContainer.updateExpandedCollapsedStateLocally(recordObjectId, false);
          } else {
            collapse.push(recordUid);
          }
        }
      }
    }

    return collapse;
  }

  /**
   * @return HTMLInputElement | void
   */
  private getFormFieldForElements(): HTMLInputElement | null {
    const formFields = document.getElementsByName(this.container.dataset.formField);
    if (formFields.length > 0) {
      return <HTMLInputElement>formFields[0];
    }

    return null;
  }

  /**
   * Redraws rhe sorting buttons of each record
   *
   * @param {string} objectId
   * @param {Array<string>} records
   */
  private redrawSortingButtons(objectId: string, records: Array<string> = []): void {
    if (records.length === 0) {
      const formField = this.getFormFieldForElements();
      if (formField !== null) {
        records = Utility.trimExplode(',', (<HTMLInputElement>formField).value);
      }
    }

    if (records.length === 0) {
      return;
    }

    records.forEach((recordUid: string, index: number): void => {
      const recordContainer = InlineControlContainer.getInlineRecordContainer(objectId + Separators.structureSeparator + recordUid);
      const headerIdentifier = recordContainer.dataset.objectIdHash + '_header';
      const headerElement = document.getElementById(headerIdentifier);
      const sortUp = headerElement.querySelector('[data-action="sort"][data-direction="' + SortDirections.UP + '"]');

      if (sortUp !== null) {
        let iconIdentifier = 'actions-move-up';
        if (index === 0) {
          sortUp.classList.add('disabled');
          iconIdentifier = 'empty-empty';
        } else {
          sortUp.classList.remove('disabled');
        }
        Icons.getIcon(iconIdentifier, Icons.sizes.small).then((markup: string): void => {
          sortUp.replaceChild(document.createRange().createContextualFragment(markup), sortUp.querySelector('.t3js-icon'));
        });
      }

      const sortDown = headerElement.querySelector('[data-action="sort"][data-direction="' + SortDirections.DOWN + '"]');
      if (sortDown !== null) {
        let iconIdentifier = 'actions-move-down';
        if (index === records.length - 1) {
          sortDown.classList.add('disabled');
          iconIdentifier = 'empty-empty';
        } else {
          sortDown.classList.remove('disabled');
        }
        Icons.getIcon(iconIdentifier, Icons.sizes.small).then((markup: string): void => {
          sortDown.replaceChild(document.createRange().createContextualFragment(markup), sortDown.querySelector('.t3js-icon'));
        });
      }
    });
  }

  /**
   * @return {boolean}
   */
  private isBelowMax(): boolean {
    const formField = this.getFormFieldForElements();
    if (formField === null) {
      return true;
    }

    if (typeof TYPO3.settings.FormEngineInline.config[this.container.dataset.objectGroup] !== 'undefined') {
      const records = Utility.trimExplode(',', (<HTMLInputElement>formField).value);
      if (records.length >= TYPO3.settings.FormEngineInline.config[this.container.dataset.objectGroup].max) {
        return false;
      }

      if (this.hasObjectGroupDefinedUniqueConstraints()) {
        const unique = TYPO3.settings.FormEngineInline.unique[this.container.dataset.objectGroup];
        if (unique.used.length >= unique.max && unique.max >= 0) {
          return false;
        }
      }
    }

    return true;
  }

  /**
   * @param {number} uid
   * @param {string} table
   */
  private isUniqueElementUsed(uid: number, table: string): boolean {
    if (!this.hasObjectGroupDefinedUniqueConstraints()) {
      return false;
    }

    const unique: UniqueDefinition = TYPO3.settings.FormEngineInline.unique[this.container.dataset.objectGroup];
    const values = InlineControlContainer.getValuesFromHashMap(unique.used);

    if (unique.type === 'select' && values.indexOf(uid) !== -1) {
      return true;
    }

    if (unique.type === 'groupdb') {
      for (let i = values.length - 1; i >= 0; i--) {
        // if the pair table:uid is already used:
        if (values[i].table === table && values[i].uid === uid) {
          return true;
        }
      }
    }

    return false;
  }

  /**
   * @param {HTMLDivElement} recordContainer
   */
  private removeUsed(recordContainer: HTMLDivElement): void {
    if (!this.hasObjectGroupDefinedUniqueConstraints()) {
      return;
    }

    const unique: UniqueDefinition = TYPO3.settings.FormEngineInline.unique[this.container.dataset.objectGroup];
    if (unique.type !== 'select') {
      return;
    }

    let uniqueValueField = <HTMLSelectElement>recordContainer.querySelector(
      '[name="data[' + unique.table + '][' + recordContainer.dataset.objectUid + '][' + unique.field + ']"]',
    );
    const values = InlineControlContainer.getValuesFromHashMap(unique.used);

    if (uniqueValueField !== null) {
      const selectedValue = uniqueValueField.options[uniqueValueField.selectedIndex].value;
      for (let value of values) {
        if (value !== selectedValue) {
          InlineControlContainer.removeSelectOptionByValue(uniqueValueField, value);
        }
      }
    }
  }

  /**
   * @param {string} recordUid
   * @param {string} selectedValue
   */
  private setUnique(recordUid: string, selectedValue: string): void {
    if (!this.hasObjectGroupDefinedUniqueConstraints()) {
      return;
    }
    const selectorElement: HTMLSelectElement = <HTMLSelectElement>document.getElementById(
      this.container.dataset.objectGroup + '_selector',
    );
    const unique: UniqueDefinition = TYPO3.settings.FormEngineInline.unique[this.container.dataset.objectGroup];
    if (unique.type === 'select') {
      if (!(unique.selector && unique.max === -1)) {
        const formField = this.getFormFieldForElements();
        const recordObjectId = this.container.dataset.objectGroup + Separators.structureSeparator + recordUid;
        const recordContainer = InlineControlContainer.getInlineRecordContainer(recordObjectId);
        let uniqueValueField = <HTMLSelectElement>recordContainer.querySelector(
          '[name="data[' + unique.table + '][' + recordUid + '][' + unique.field + ']"]',
        );
        const values = InlineControlContainer.getValuesFromHashMap(unique.used);
        if (selectorElement !== null) {
          // remove all items from the new select-item which are already used in other children
          if (uniqueValueField !== null) {
            for (let value of values) {
              InlineControlContainer.removeSelectOptionByValue(uniqueValueField, value);
            }
            // set the selected item automatically to the first of the remaining items if no selector is used
            if (!unique.selector) {
              selectedValue = uniqueValueField.options[0].value;
              uniqueValueField.options[0].selected = true;
              this.updateUnique(uniqueValueField, formField, recordUid);
              this.handleChangedField(uniqueValueField, this.container.dataset.objectGroup + '[' + recordUid + ']');
            }
          }
          for (let value of values) {
            InlineControlContainer.removeSelectOptionByValue(uniqueValueField, value);
          }
          if (typeof unique.used.length !== 'undefined') {
            unique.used = {};
          }
          unique.used[recordUid] = {
            table: unique.elTable,
            uid: selectedValue,
          };
        }
        // remove the newly used item from each select-field of the child records
        if (formField !== null && InlineControlContainer.selectOptionValueExists(selectorElement, selectedValue)) {
          const records = Utility.trimExplode(',', (<HTMLInputElement>formField).value);
          for (let record of records) {
            uniqueValueField = <HTMLSelectElement>document.querySelector(
              '[name="data[' + unique.table + '][' + record + '][' + unique.field + ']"]',
            );
            if (uniqueValueField !== null && record !== recordUid) {
              InlineControlContainer.removeSelectOptionByValue(uniqueValueField, selectedValue);
            }
          }
        }
      }
    } else if (unique.type === 'groupdb') {
      // add the new record to the used items:
      unique.used[recordUid] = {
        table: unique.elTable,
        uid: selectedValue,
      };
    }

    // remove used items from a selector-box
    if (unique.selector === 'select' && InlineControlContainer.selectOptionValueExists(selectorElement, selectedValue)) {
      InlineControlContainer.removeSelectOptionByValue(selectorElement, selectedValue);
      unique.used[recordUid] = {
        table: unique.elTable,
        uid: selectedValue,
      };
    }
  }

  /**
   * @param {HTMLSelectElement} srcElement
   * @param {HTMLInputElement} formField
   * @param {string} recordUid
   */
  private updateUnique(srcElement: HTMLSelectElement, formField: HTMLInputElement, recordUid: string): void {
    if (!this.hasObjectGroupDefinedUniqueConstraints()) {
      return;
    }
    const unique = TYPO3.settings.FormEngineInline.unique[this.container.dataset.objectGroup];
    const oldValue = unique.used[recordUid];

    if (unique.selector === 'select') {
      const selectorElement: HTMLSelectElement = <HTMLSelectElement>document.getElementById(
        this.container.dataset.objectGroup + '_selector',
      );
      InlineControlContainer.removeSelectOptionByValue(selectorElement, srcElement.value);
      if (typeof oldValue !== 'undefined') {
        InlineControlContainer.reAddSelectOption(selectorElement, oldValue, unique);
      }
    }

    if (unique.selector && unique.max === -1) {
      return;
    }

    if (!unique || formField === null) {
      return;
    }

    const records = Utility.trimExplode(',', formField.value);
    let uniqueValueField;
    for (let record of records) {
      uniqueValueField = <HTMLSelectElement>document.querySelector(
        '[name="data[' + unique.table + '][' + record + '][' + unique.field + ']"]',
      );
      if (uniqueValueField !== null && uniqueValueField !== srcElement) {
        InlineControlContainer.removeSelectOptionByValue(uniqueValueField, srcElement.value);
        if (typeof oldValue !== 'undefined') {
          InlineControlContainer.reAddSelectOption(uniqueValueField, oldValue, unique);
        }
      }
    }
    unique.used[recordUid] = srcElement.value;
  }

  /**
   * @param {string} recordUid
   */
  private revertUnique(recordUid: string): void {
    if (!this.hasObjectGroupDefinedUniqueConstraints()) {
      return;
    }

    const unique = TYPO3.settings.FormEngineInline.unique[this.container.dataset.objectGroup];
    const recordObjectId = this.container.dataset.objectGroup + Separators.structureSeparator + recordUid;
    const recordContainer = InlineControlContainer.getInlineRecordContainer(recordObjectId);

    let uniqueValueField = <HTMLSelectElement>recordContainer.querySelector(
      '[name="data[' + unique.table + '][' + recordContainer.dataset.objectUid + '][' + unique.field + ']"]',
    );
    if (unique.type === 'select') {
      let uniqueValue;
      if (uniqueValueField !== null) {
        uniqueValue = uniqueValueField.value;
      } else if (recordContainer.dataset.tableUniqueOriginalValue !== '') {
        uniqueValue = recordContainer.dataset.tableUniqueOriginalValue;
      } else {
        return;
      }

      if (unique.selector === 'select') {
        if (!isNaN(parseInt(uniqueValue, 10))) {
          const selectorElement: HTMLSelectElement = <HTMLSelectElement>document.getElementById(
            this.container.dataset.objectGroup + '_selector',
          );
          InlineControlContainer.reAddSelectOption(selectorElement, uniqueValue, unique);
        }
      }

      if (unique.selector && unique.max === -1) {
        return;
      }

      const formField = this.getFormFieldForElements();
      if (formField === null) {
        return;
      }

      const records = Utility.trimExplode(',', formField.value);
      let recordObj;
      // walk through all inline records on that level and get the select field
      for (let i = 0; i < records.length; i++) {
        recordObj = <HTMLSelectElement>document.querySelector(
          '[name="data[' + unique.table + '][' + records[i] + '][' + unique.field + ']"]',
        );
        if (recordObj !== null) {
          InlineControlContainer.reAddSelectOption(recordObj, uniqueValue, unique);
        }
      }

      delete unique.used[recordUid];
    } else if (unique.type === 'groupdb') {
      delete unique.used[recordUid];
    }
  }

  /**
   * @return {boolean}
   */
  private hasObjectGroupDefinedUniqueConstraints(): boolean {
    return typeof TYPO3.settings.FormEngineInline.unique !== 'undefined'
      && typeof TYPO3.settings.FormEngineInline.unique[this.container.dataset.objectGroup] !== 'undefined';
  }

  /**
   * @param {HTMLInputElement | HTMLSelectElement} formField
   * @param {string} objectId
   */
  private handleChangedField(formField: HTMLInputElement | HTMLSelectElement, objectId: string): void {
    let value;
    if (formField instanceof HTMLSelectElement) {
      value = formField.options[formField.selectedIndex].text;
    } else {
      value = formField.value;
    }
    document.getElementById(objectId + '_label').textContent = value.length ? value : this.noTitleString;
  }

  /**
   * @return {Object}
   */
  private getAppearance(): Appearance {
    if (this.appearance === null) {
      this.appearance = {};

      if (typeof this.container.dataset.appearance === 'string') {
        try {
          this.appearance = JSON.parse(this.container.dataset.appearance);
        } catch (e) {
          console.error(e);
        }
      }
    }

    return this.appearance;
  }
}

export = InlineControlContainer;