import {Component, OnInit, ViewChild} from '@angular/core';
import {ActivatedRoute, Router} from '@angular/router';
import {EmailService} from "../openaireLibrary/utils/email/email.service";
import {Email} from "../openaireLibrary/utils/email/email";
import {EnvProperties} from "../openaireLibrary/utils/properties/env-properties";
import {Composer} from "../openaireLibrary/utils/email/composer";
import {Meta, Title} from "@angular/platform-browser";
import {PiwikService} from "../openaireLibrary/utils/piwik/piwik.service";
import {HelperFunctions} from "../openaireLibrary/utils/HelperFunctions.class";
import {HelperService} from "../openaireLibrary/utils/helper/helper.service";
import {SEOService} from "../openaireLibrary/sharedComponents/SEO/SEO.service";
import {FormBuilder, FormGroup, Validators} from "@angular/forms";
import {Breadcrumb} from "../openaireLibrary/utils/breadcrumbs/breadcrumbs.component";
import {Subscriber} from "rxjs";
import {properties} from "../../environments/environment";
import {NotificationHandler} from "../openaireLibrary/utils/notification-handler";
import {ContactUsComponent} from "../openaireLibrary/contact-us/contact-us.component";

@Component({
	selector: 'contact',
	templateUrl: './contact.component.html',
})

export class ContactComponent implements OnInit {
	public url: string = null;
	public pageTitle: string = "OpenAIRE - Explore | Contact Us";
	public description: string = "Contact us to learn more about OpenAIRE Explore";
	public sending = true;
	public email: Email;
	public properties: EnvProperties = properties;
	public pageContents = null;
	public divContents = null;
	public breadcrumbs: Breadcrumb[] = [{name: 'home', route: '/'}, {name: 'Contact us'}];
	public contactForm: FormGroup;
	@ViewChild('modal') modal;
	private subscriptions = [];
  @ViewChild('contactUs') contactUsComponent : ContactUsComponent;

	ngOnDestroy() {
		this.subscriptions.forEach(subscription => {
			if (subscription instanceof Subscriber) {
					subscription.unsubscribe();
			}
		});
	}

	constructor(private route: ActivatedRoute,
							private _router: Router,
							private _emailService: EmailService,
							private _meta: Meta,
							private _title: Title,
							private seoService: SEOService,
							private _piwikService: PiwikService,
							private fb: FormBuilder,
							private helper: HelperService) {
	}

	ngOnInit() {
		this._title.setTitle('OpenAIRE - Explore | Contact Us');

		this.properties = properties;
		this.email = {body: '', subject: '', recipients: []};
		this.subscriptions.push( this._piwikService.trackView(this.properties, this.pageTitle).subscribe());
		this.url = this.properties.domain + this._router.url;
		this.seoService.createLinkForCanonicalURL(this.url);
		this.updateUrl(this.url);
		this.updateTitle(this.pageTitle);
		this.updateDescription(this.description);
		this.reset();
		// this.getPageContents();
		this.sending = false;
	}

	private getPageContents() {
		this.subscriptions.push(this.helper.getPageHelpContents(this.properties, 'explore', this._router.url).subscribe(contents => {
			this.pageContents = contents;
		}));
	}

	public send(event) {
		HelperFunctions.scroll();
		if(event.valid === true) {
			this.sendMail(this.properties.admins);
		}
	}

	public reset() {
		this.contactForm = this.fb.group( {
			name: this.fb.control('', Validators.required),
			surname: this.fb.control('', Validators.required),
			email: this.fb.control('', [Validators.required, Validators.email]),
			affiliation: this.fb.control(''),
			message: this.fb.control('', Validators.required),
			recaptcha: this.fb.control('', Validators.required),
		});
    if(this.contactUsComponent) {
      this.contactUsComponent.resetRecaptcha();
    }
	}

	private sendMail(admins: any) {
		this.sending = true;
		this.subscriptions.push(this._emailService.contact(this.properties,
				Composer.composeEmailForExplore(this.contactForm.value, admins),
			this.contactForm.value.recaptcha).subscribe(
				res => {
					if (res) {
							this.sending = false;
							this.reset();
							this.modalOpen();
					} else {
							this.handleError('Email <b>sent failed!</b> Please try again.');
					}
				},
				error => {
					this.handleError('Email sent failed! Please try again.', error);
				}
		));
	}

	public modalOpen() {
		this.modal.okButton = true;
		this.modal.alertTitle = 'Your request has been successfully submitted';
		this.modal.alertMessage = false;
		this.modal.cancelButton = false;
		this.modal.okButtonLeft = false;
		this.modal.okButtonText = 'OK';
		this.modal.open();
	}

	handleError(message: string, error = null) {
		if(error) {
			console.error(error);
		}
		NotificationHandler.rise(message, 'danger');
		this.sending = false;
		this.contactForm.get('recaptcha').setValue('');
	}

	public goToHome() {
		this._router.navigate(['/']);
	}

	private updateDescription(description: string) {
		this._meta.updateTag({content: description}, "name='description'");
		this._meta.updateTag({content: description}, "property='og:description'");
	}

	private updateTitle(title: string) {
		var _title = ((title.length > 50) ? title.substring(0, 50) : title);
		this._title.setTitle(_title);
		this._meta.updateTag({content: _title}, "property='og:title'");
	}

	private updateUrl(url: string) {
		this._meta.updateTag({content: url}, "property='og:url'");
	}
}