import { Component, EventEmitter, Input, Output } from '@angular/core';

import { ListViewManageFiltersService } from '@app/services/filters/list-view-manage-filters.service';
import {
  AggregationFilterNames,
  AggregationOptionType,
  AvailabilityFilterMap,
  DaterangeFilterAvailability,
  DaterangeFilterModel,
  DaterangeFilterUpdated,
  FiltersToSend,
  IAggregationProperties,
  IAggregationPropertiesForRegions,
  IListViewFilterAggregationsOptions,
} from '@app/services/models/filters';

/**
 * Abstract Component for List View filters
 */
@Component({
  template: '',
  standalone: true,
})
export class ListViewFilterAbstractComponent {
  /**
   * All available Names for Filters
   */
  readonly FiltersNames = AggregationFilterNames;

  /**
   * All available Names for Options
   */
  readonly OptionsNames = AggregationOptionType;

  /**
   * selected Options
   */
  selectedData;

  /**
   * map for each filter, determines if option selection has changed
   */
  availabilityFilterMap: AvailabilityFilterMap;

  /**
   * filter options
   */
  @Input() filtersOptions: IListViewFilterAggregationsOptions;

  /**
   * original data before all changes, neede to determine if filter has changed
   */
  @Input() originalSelectedData;

  /**
   * max length of search input
   */
  @Input() maxLength: number;

  /**
   * sets selected filters and builds availability model for tracking changes inside filters
   * @param {FilterModel} dataModel
   */
  @Input() set data(dataModel) {
    this.selectedData = dataModel;
    this.availabilityFilterMap = this.manageFiltersService.buildAvailibilityMap(Object.keys(this.selectedData));
  }

  /**
   * apply filter event
   */
  @Output() applyFilters = new EventEmitter<any>();

  constructor(protected manageFiltersService: ListViewManageFiltersService) {}

  /**
   * updates selected filters data and availability map for multiselect filter after change has been made
   * @param {string} name
   * @param {IAggregationProperties} selectedOption
   */
  onSelectedChange(name: string, selectedOption: IAggregationProperties | IAggregationPropertiesForRegions) {
    let shouldEnable: boolean;
    if (name === 'regions') {
      this.selectedData[name] = this.manageFiltersService.changeSingleselectFilter(
        selectedOption as IAggregationPropertiesForRegions,
      ) as any;
      shouldEnable = true;
    } else {
      this.selectedData[name] = this.manageFiltersService.changeMultiselectFilter(
        this.selectedData[name],
        selectedOption as IAggregationProperties,
      ) as any;
      shouldEnable = this.manageFiltersService.checkIfMultiselectChanged(
        this.selectedData[name],
        this.originalSelectedData[name],
      );
    }
    this.availabilityFilterMap = { ...this.availabilityFilterMap, ...{ [name]: shouldEnable } };
  }

  /**
   * updates selected filters data and availability map for daterange filter after change has been made
   * @param {DaterangeFilterUpdated []} data
   */
  onDaterangeChange(data: DaterangeFilterUpdated[]) {
    const newDaterange: DaterangeFilterModel = this.manageFiltersService.changeDaterangeFilter(data);
    this.selectedData = Object.assign(this.selectedData, newDaterange);
    const newDaterangeAvailibility: DaterangeFilterAvailability = this.manageFiltersService.getDaterangeAvailability(
      data,
      newDaterange,
      this.originalSelectedData,
    );

    this.availabilityFilterMap = { ...this.availabilityFilterMap, ...newDaterangeAvailibility };
  }

  /**
   * prepares selected data and sends by applyFilters event
   * @param {string []} filterNames names to send
   */
  protected applyFilter(filterNames: string[]) {
    const data: FiltersToSend = this.manageFiltersService.prepareToApply(filterNames, this.selectedData);
    this.applyFilters.emit(data);
  }
}
