import { ChangeDetectorRef, Component, Inject, Input, OnInit } from '@angular/core';
import { Poll } from '../../../core/models/poll.model';
import { FormArray, FormBuilder, FormGroup, Validators } from '@angular/forms';
import { UuidService } from '../../../core/services/uuid.service';
import { ApiService } from '../../../core/services/api.service';
import { ToastService } from '../../../core/services/toast.service';
import { PollService } from '../../../core/services/poll.service';
import { DateUtilities } from '../../old-stuff/config/DateUtilities';
import { DOCUMENT } from '@angular/common';

@Component({
	selector: 'app-admin-form',
	templateUrl: './form.component.html',
	styleUrls: ['./form.component.scss'],
})
export class FormComponent implements OnInit {
	@Input()
	public poll?: Poll;
	public form: FormGroup;

	public urlPrefix: string = window.location.origin + '/participation/';
	public advancedDisplayEnabled = false;
	public showDateInterval = true;
	startDateInterval: any;
	intervalDays: any;
	intervalDaysDefault = 7;
	endDateInterval: any;
	dateList: any[];

	constructor(
		private fb: FormBuilder,
		private cd: ChangeDetectorRef,
		private uuidService: UuidService,
		private toastService: ToastService,
		private pollService: PollService,
		public dateUtilities: DateUtilities,
		private apiService: ApiService,
		@Inject(DOCUMENT) private document: any
	) {}

	ngOnInit(): void {
		this.initFormDefault();
	}

	public createPoll(): void {
		if (this.form.valid && this.form.valid) {
			console.log('Le sondage est correctement rempli, prêt à enregistrer.');
			const newpoll = this.pollService.newPollFromForm(this.form);
			// TODO : save the poll
			this.apiService.createPoll(newpoll);
		}
	}

	public updateSlug(): void {
		const newValueFormatted = 'TODO';
		this.form.patchValue({ slug: newValueFormatted });
	}

	get choices(): FormArray {
		return this.form.get('choices') as FormArray;
	}

	addChoice(optionalLabel = ''): void {
		const newControlGroup = this.fb.group({
			label: this.fb.control('', [Validators.required]),
			imageUrl: ['', [Validators.required]],
		});

		if (optionalLabel) {
			newControlGroup.patchValue({
				label: optionalLabel,
			});
		}
		this.choices.push(newControlGroup);
		this.cd.detectChanges();
		console.log('this.choices.length', this.choices.length);
		const selector = '#choice_label_' + (this.choices.length - 1);
		const elem = this.document.querySelector(selector);
		if (elem) {
			elem.focus();
		}
	}

	deleteChoiceField(index: number): void {
		if (this.choices.length !== 1) {
			this.choices.removeAt(index);
		}
	}

	reinitChoices(): void {
		this.choices.setValue([]);
	}

	initFormDefault(showDemoValues = true): void {
		this.form = this.fb.group({
			title: ['', [Validators.required, Validators.minLength(12)]],
			creatorPseudo: ['', [Validators.required]],
			creatorEmail: ['', [Validators.required]],
			slug: [this.uuidService.getUUID(), [Validators.required]],
			description: ['', [Validators.required]],
			choices: new FormArray([]),
			isAboutDate: [true, [Validators.required]],
			startDateInterval: ['', [Validators.required]],
			endDateInterval: ['', [Validators.required]],
			isProtectedByPassword: [false, [Validators.required]],
			isOwnerNotifiedByEmailOnNewVote: [false, [Validators.required]],
			isOwnerNotifiedByEmailOnNewComment: [false, [Validators.required]],
			isMaybeAnswerAvailable: [false, [Validators.required]],
			areResultsPublic: [true, [Validators.required]],
			expiracyNumberOfDays: [60, [Validators.required, Validators.min(0)]],
		});
		console.log('this.form ', this.form);
		this.setDefaultDatesForInterval();

		if (showDemoValues) {
			this.setDemoValues();
		}
	}

	/**
	 * default interval of dates proposed is from today to 7 days more
	 */
	setDefaultDatesForInterval(): void {
		const dateCurrent = new Date();
		const dateJson = dateCurrent.toISOString();
		this.startDateInterval = dateJson.substring(0, 10);
		this.endDateInterval = this.dateUtilities
			.addDaysToDate(this.intervalDaysDefault, dateCurrent)
			.toISOString()
			.substring(0, 10);
		this.form.patchValue({
			startDateInterval: this.startDateInterval,
			endDateInterval: this.endDateInterval,
		});
	}

	/**
	 * add example values to the form
	 */
	setDemoValues(): void {
		this.addChoice('orange');
		this.addChoice('raisin');
		this.addChoice('abricot');

		this.form.patchValue({
			title: 'mon titre',
			description: 'répondez SVP <3 ! *-* ',
			slug: this.uuidService.getUUID(),
			creatorPseudo: 'Chuck Norris',
			creatorEmail: '',
			choices: ['matin', 'midi'],
			isAboutDate: true,
			isProtectedByPassword: false,
			isOwnerNotifiedByEmailOnNewVote: false,
			isOwnerNotifiedByEmailOnNewComment: false,
			isMaybeAnswerAvailable: false,
			areResultsPublic: true,
			expiracyNumberOfDays: 60,
		});
	}

	askInitFormDefault(): void {
		this.initFormDefault(false);
		this.toastService.display('formulaire réinitialisé');
	}

	countDays(): void {
		this.intervalDays = this.dateUtilities.countDays(this.startDateInterval, this.endDateInterval);
	}

	/**
	 * add all the dates between the start and end dates in the interval section
	 */
	addIntervalOfDates(): void {
		const newIntervalArray = this.dateUtilities.getDatesInRange(this.startDateInterval, this.endDateInterval, 1);

		const converted = [];
		newIntervalArray.forEach((element) => {
			converted.push({
				literal: element.literal,
				date_object: element.date_object,
				timeList: [],
			});
		});
		this.dateList = [...new Set(converted)];
		// add only dates that are not already present with a Set of unique items
		console.log('this.dateList', this.dateList);
		this.showDateInterval = false;

		this.toastService.display(`les dates ont été ajoutées aux réponses possibles.`);
	}

	/**
	 * handle keyboard shortcuts
	 * @param $event
	 */
	keyOnChoice($event: KeyboardEvent, choice_number: number): void {
		$event.preventDefault();

		console.log('this.choices.length', this.choices.length);
		console.log('choice_number', choice_number);
		const lastChoice = this.choices.length - 1 === choice_number;
		// reset field with Ctrl + D
		// add a field with Ctrl + N
		// go to previous choice with arrow up
		// go to next choice with arrow down
		console.log('$event', $event);

		if ($event.key == 'ArrowUp' && choice_number > 0) {
			const selector = '#choice_label_' + (choice_number - 1);
			const elem = this.document.querySelector(selector);
			if (elem) {
				elem.focus();
			}
		}
		if ($event.key == 'ArrowDown') {
			// add a field if we are on the last choice
			if (lastChoice) {
				this.addChoice();
				this.toastService.display('choix ajouté par raccourci "flèche bas"');
			} else {
				const selector = '#choice_label_' + (choice_number + 1);
				const elem = this.document.querySelector(selector);
				if (elem) {
					elem.focus();
				}
			}
		}
		if ($event.ctrlKey && $event.key == 'Backspace') {
			this.deleteChoiceField(choice_number);
			this.toastService.display('choix supprimé par raccourci "Ctrl + retour"');
			this.cd.detectChanges();
			const selector = '#choice_label_' + Math.min(choice_number - 1, 0);
			const elem = this.document.querySelector(selector);
			if (elem) {
				elem.focus();
			}
		}
		if ($event.ctrlKey && $event.key == 'Enter') {
			// go to other fields
			const elem = this.document.querySelector('#creatorEmail');
			if (elem) {
				elem.focus();
			}
		}
	}
}