import { Component, Input, OnInit } from '@angular/core';
import { FormGroup } from '@angular/forms';
import { takeUntil } from 'rxjs/operators';
import { BaseComponent } from '../../../../../core/common/base/base.component';
import { DatasetProfileComboBoxType } from '../../../../../core/common/enum/dataset-profile-combo-box-type';
import { DatasetProfileFieldViewStyle } from '../../../../../core/common/enum/dataset-profile-field-view-style';
import { DatasetExternalAutocompleteCriteria } from '../../../../../core/query/dataset/daatset-external-autocomplete-criteria';
import { RequestItem } from '../../../../../core/query/request-item';
import { DatasetExternalAutocompleteService } from '../../../../../core/services/dataset/dataset-external-autocomplete.service';
import { SingleAutoCompleteConfiguration } from '../../../../../library/auto-complete/single/single-auto-complete-configuration';
import { VisibilityRulesService } from '../../visibility-rules/visibility-rules.service';
import { MultipleAutoCompleteConfiguration } from '../../../../../library/auto-complete/multiple/multiple-auto-complete-configuration';

@Component({
	selector: 'app-form-field',
	templateUrl: './form-field.component.html',
	styleUrls: ['./form-field.component.scss']
})
export class FormFieldComponent extends BaseComponent implements OnInit {

	// @Input() field: Field;
	@Input() form: FormGroup;
	@Input() datasetProfileId: String;
	@Input() isChild: Boolean = false;

	// change: Subscription;
	// trackByFn = (index, item) => item ? item['id'] : null;

	public singleAutoCompleteConfiguration: SingleAutoCompleteConfiguration;
	public multipleAutoCompleteConfiguration: MultipleAutoCompleteConfiguration;
	datasetProfileFieldViewStyleEnum = DatasetProfileFieldViewStyle;
	datasetProfileComboBoxTypeEnum = DatasetProfileComboBoxType;

	constructor(
		public visibilityRulesService: VisibilityRulesService,
		private datasetExternalAutocompleteService: DatasetExternalAutocompleteService
	) { super(); }

	ngOnInit() {
		if (this.form.get('value').value) {
			this.visibilityRulesService.updateValueAndVisibility(this.form.get('id').value, this.form.get('value').value);
		}

		// Setup autocomplete configuration if needed
		if (this.form.get('viewStyle').value.renderStyle === DatasetProfileFieldViewStyle.ComboBox && this.form.get('data').value.type === DatasetProfileComboBoxType.Autocomplete) {
			if (!(this.form.controls['data'].value.multiAutoComplete)) {
				this.singleAutoCompleteConfiguration = {
					filterFn: this.searchFromAutocomplete.bind(this),
					initialItems: (extraData) => this.searchFromAutocomplete(''),
					displayFn: (item) => (item != null && item.length > 1) ? JSON.parse(item).label : item['label'],
					titleFn: (item) => item['label'],
					valueAssign: (item) => JSON.stringify(item)
				};
			}
			else {
				this.multipleAutoCompleteConfiguration = {
					filterFn: this.searchFromAutocomplete.bind(this),
					initialItems: (extraData) => this.searchFromAutocomplete(''),
					displayFn: (item) => item['label'],
					titleFn: (item) => item['label'],
					valueAssign: this._transformValue
				}
			}
		}

		// this.form = this.visibilityRulesService.getFormGroup(this.field.id);
		this.form.get('value').valueChanges
			.pipe(takeUntil(this._destroyed))
			.subscribe(item => {
				this.visibilityRulesService.updateValueAndVisibility(this.form.get('id').value, item);
			});
	}

	_optionRemove(event) {
		const array = JSON.parse(this.form.get('value').value);
		if (array) {
			const index = array.map(x => x.id).indexOf(event.id);
			if (index >= 0) {
				array.splice(index, 1);
			}
			this.form.get('value').patchValue(JSON.stringify(array));
		}
	}

	_transformValue(item: any) {
		if (!item) return [];
		return item && typeof item === 'string' ? JSON.parse(item) : JSON.stringify(item);
	}

	searchFromAutocomplete(query: string) {
		const autocompleteRequestItem: RequestItem<DatasetExternalAutocompleteCriteria> = new RequestItem();
		autocompleteRequestItem.criteria = new DatasetExternalAutocompleteCriteria();

		autocompleteRequestItem.criteria.fieldID = this.form.get('id').value;
		autocompleteRequestItem.criteria.profileID = this.datasetProfileId;
		autocompleteRequestItem.criteria.like = query;
		return this.datasetExternalAutocompleteService.queryAutocomplete(autocompleteRequestItem);
	}
}