import { Injectable } from '@angular/core';
import { ActivatedRouteSnapshot, Resolve, Router, RouterStateSnapshot } from '@angular/router';
import { BehaviorSubject, Observable, Subscription } from 'rxjs';

import { Answer } from '../enums/answer.enum';
import { Choice } from '../models/choice.model';
import { Poll } from '../models/poll.model';
import { Owner } from '../models/owner.model';
import { ApiService } from './api.service';
import { ToastService } from './toast.service';
import { UserService } from './user.service';
import { UuidService } from './uuid.service';
import { HttpClient } from '@angular/common/http';
import { environment } from '../../../environments/environment';
import { StorageService } from './storage.service';
import { Title } from '@angular/platform-browser';
import { DateUtilitiesService } from './date.utilities.service';

@Injectable({
	providedIn: 'root',
})
export class PollService implements Resolve<Poll> {
	_poll: BehaviorSubject<Poll | undefined> = new BehaviorSubject<Poll | undefined>(undefined);
	public readonly poll: Observable<Poll | undefined> = this._poll.asObservable();

	constructor(
		private http: HttpClient,
		private router: Router,
		private apiService: ApiService,
		private storageService: StorageService,
		private userService: UserService,
		private uuidService: UuidService,
		private dateUtils: DateUtilitiesService,
		private titleService: Title,
		private toastService: ToastService
	) {
		this._poll.next(new Poll(null, 'titre', 'custom-title'));
	}

	/**
	 * auto fetch a poll when route is looking for one in the administration pattern
	 * @param route
	 * @param state
	 */
	public async resolve(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): Promise<Poll> {
		console.log('resolve route,state', route, state);
		const segments: string[] = state.url.split('/');
		const wantedcustom_url: string = segments.includes('poll') ? segments[segments.indexOf('poll') + 1] : '';

		if (
			!this._poll.getValue() ||
			!this._poll.getValue().custom_url ||
			this._poll.getValue().custom_url !== wantedcustom_url
		) {
			await this.loadPollBycustom_url(wantedcustom_url);
		}
		if (this._poll.getValue()) {
			return this._poll.getValue();
		} else {
			this.router.navigate(['page-not-found']);
			return;
		}
	}

	getAllAvailablePolls() {
		const baseHref = environment.api.version.apiV1.baseHref;
		console.log('getAllAvailablePolls baseHref', baseHref);
		const headers = ApiService.makeHeaders();
		console.log('getAllAvailablePolls headers', headers);
		try {
			this.http.get(`${baseHref}/poll`, headers).subscribe((res: Observable<any>) => {
				console.log('getAllAvailablePolls res', res);
			});
		} catch (e) {
			console.error('getAllAvailablePolls e', e);
		}
	}

	public async loadPollBycustom_url(custom_url: string): Promise<void> {
		console.log('custom_url', custom_url);
		if (custom_url) {
			const poll: Poll | undefined = await this.apiService.getPollByCustomUrl(custom_url);

			console.log('loadPollBycustom_urlResponse', poll);
			if (poll) {
				this.updateCurrentPoll(poll);
				this.titleService.setTitle(`☑️ ${poll.title} - ${environment.appTitle}`);
			} else {
				this.toastService.display(`sondage ${custom_url} non trouvé`);
			}
		} else {
			this.toastService.display(`sondage sans custom url : ${custom_url}`);
		}
	}

	public async loadPollBycustom_urlWithPasswordHash(custom_url: string, hash: string): Promise<void> {
		console.log('custom_url', custom_url);
		if (custom_url) {
			const poll: Poll | undefined = await this.apiService.getPollByCustomUrlWithHash(custom_url, hash);
			console.log({ loadPollBycustom_urlResponse: poll });
			this.updateCurrentPoll(poll);
		}
	}

	/**
	 * update poll and parse its fields
	 * @param poll
	 */
	public updateCurrentPoll(poll: Poll): void {
		console.log('update poll with: ', poll);

		if (!this.storageService.vote_stack.id || this.storageService.vote_stack.poll_custom_url !== poll.custom_url) {
			console.log('set base choices', poll.choices);
			// set the choices only the first time the poll loads
			this.storageService.setChoicesForVoteStack(poll.choices);
		}

		this.toastService.display('sondage bien mis à jour', 'success');

		console.log('poll', poll);
		this._poll.next(poll);
	}

	/**
	 *  make a uniq custom_url for the current poll creation
	 * @param poll
	 */
	makecustom_url(poll: Poll): string {
		console.log('config', poll);
		let str = '';
		const creation_date = new Date(poll.creation_date);
		str =
			creation_date.getFullYear() +
			'_' +
			(creation_date.getMonth() + 1) +
			'_' +
			creation_date.getDate() +
			'_' +
			poll.owner.pseudo +
			'_' +
			poll.title;

		return this.convertTextToSlug(str) + '-' + this.uuidService.getUUID();
	}

	public convertTextToSlug(str: string) {
		str = str.trim();
		str = str.replace(/^\s+|\s+$/g, ''); // trim
		str = str.toLowerCase();

		// remove accents, swap ñ for n, etc
		const from = 'àáäâèéëêìíïîòóöôùúüûñç·/_,:;';
		const to = 'aaaaeeeeiiiioooouuuunc------';
		for (let i = 0, l = from.length; i < l; i++) {
			str = str.replace(new RegExp(from.charAt(i), 'g'), to.charAt(i));
		}

		str = str
			.replace(/[^a-z0-9 -]/g, '') // remove invalid chars
			.replace(/\s+/g, '-') // collapse whitespace and replace by -
			.replace(/-+/g, '-'); // collapse dashes
		return str;
	}

	public saveParticipation(choice: Choice, user: Owner, response: Answer): void {
		const currentPoll = this._poll.getValue();
		currentPoll.choices.find((c) => c.name === choice.name)?.updateParticipation(user, response);
		this.updateCurrentPoll(currentPoll);
		this.apiService.createParticipation(currentPoll.custom_url, choice.name, user.pseudo, response);
		this.toastService.display('Votre participation au sondage a été enregistrée.');
	}

	public async deleteAllAnswers(): Promise<void> {
		await this.apiService.deletePollAnswers(this._poll.getValue().custom_url);
		this.toastService.display('Les participations des votants à ce sondage ont été supprimées.');
	}

	public async addComment(comment: string): Promise<void> {
		await this.apiService.createComment(this._poll.getValue().custom_url, comment);
		this.toastService.display('Votre commentaire a été enregistré.');
	}

	public async deleteComments(): Promise<void> {
		await this.apiService.deletePollComments(this._poll.getValue().custom_url);
		this.toastService.display('Les commentaires de ce sondage ont été supprimés.');
	}

	/**
	 * @description convert to API version 1 data transition object
	 * @param form
	 */
	newPollFromForm(form: any): Poll {
		const newOwner = this.storageService.vote_stack.owner;

		const newpoll = new Poll(newOwner, form.value.custom_url, form.value.title);

		const pollKeys = Object.keys(newpoll);
		const formFields = Object.keys(form.value);

		console.log('pollKeys, formFields', pollKeys, formFields);
		newpoll.allowed_answers = ['yes'];

		for (const pk of pollKeys) {
			if (formFields.indexOf(pk) !== -1) {
				const field = form.value[pk];
				newpoll[pk] = field;
			} else {
				console.log('manque pollKey', pk);
			}
		}

		if (form.value.isMaybeAnswerAvailable) {
			newpoll.allowed_answers.push('maybe');
		}
		if (form.value.isNoAnswerAvailable) {
			newpoll.allowed_answers.push('no');
		}
		newpoll.description = form.value.description;
		newpoll.has_several_hours = form.value.hasSeveralHours;
		newpoll.hasSeveralHours = form.value.hasSeveralHours;
		newpoll.max_count_of_answers = form.value.allowComments;
		newpoll.maxCountOfAnswers = form.value.maxCountOfAnswers;
		newpoll.password = form.value.password;
		newpoll.kind = form.value.kind;
		newpoll.allow_comments = form.value.allowComments;
		// merge choices from storage
		newpoll.choices = Object.assign([], this.storageService.choices);
		newpoll.dateChoices = Object.assign([], this.storageService.dateChoices);
		newpoll.timeSlices = Object.assign([], this.storageService.timeSlices);

		console.log('this.storageService.timeSlices', this.storageService.timeSlices, newpoll.timeSlices);

		return newpoll;
	}

	public getAdministrationUrl(): string {
		let url = '';
		if (this._poll && this._poll.getValue) {
			const polltemp = this._poll.getValue();
			if (polltemp) {
				url = `${environment.frontDomain}#/poll/admin/${polltemp.admin_key}`;
			}
		}
		return url;
	}

	public getParticipationUrl(): string {
		let url = '';
		if (this._poll && this._poll.getValue) {
			const polltemp = this._poll.getValue();
			if (polltemp) {
				url = `${environment.frontDomain}#/poll/${polltemp.custom_url}/consultation`;
			}
		}
		// TODO handle pass access
		return url;
	}
}