import { Component, OnInit, OnDestroy, Injectable, ChangeDetectorRef } from '@angular/core';
import { CanActivate, Router, RouterStateSnapshot, ActivatedRouteSnapshot, ActivatedRoute } from '@angular/router';
import { MatDialog, MatDialogConfig} from '@angular/material/dialog';
import { FormBuilder, Validators, FormGroup, FormControl } from '@angular/forms';
import { UserService } from '../user.service';
import { FullnodeService } from '../fullnode.service';
import { ScanComponent} from '../scan/scan.component';
import { Tx } from '../tx.model';
import {User} from '../user.model';
import { Subscription, Observable } from 'rxjs';
import { take } from 'rxjs/operators';
import { v4 as uuidv4 } from 'uuid';
var QRCode = require('easyqrcodejs');
var URLSafeBase64 = require('urlsafe-base64');
var Buffer = require('buffer/').Buffer;


@Component({
	selector: 'app-login',
	templateUrl: './login.component.html',
	styleUrls: ['./login.component.css']
})

export class LoginComponent implements OnInit {
	txs: Tx[] = [];
	intervalHolder: any;
	nodeAddress: string = '';
	localToken: string | null = '';
	selectedValue: number = 0.001;
	pinError: boolean = false;
	public user:User = {
		address: '',
		session: '',
		blocktime: 0,
		expiration: 0,
		pin: '',
		validated: false
	};
	private FullnodeSub: Subscription = new Subscription();
	private UserSub: Subscription = new Subscription();
	public heightUpdate: Observable<number>;
	public uZaddrUpdate: Observable<string>;
	public userUpdate:Observable<User>;
	public txsUpdate: Observable<Tx[]>;
	tickets = [
		{
			value: 0.001,
			viewValue: '1 hour: 0.001 ZEC'
		},{
			value: 0.005,
			viewValue: '1 day: 0.005 ZEC'
		},{
			value: 0.025,
			viewValue: '1 week: 0.025 ZEC'
		}
	];
	prompt: boolean = false;
	confirmedMemo: boolean = false;
	targetBlock: number = 0;

	entryForm: FormGroup;
	pinForm: FormGroup;

	constructor(
		private fb: FormBuilder,
		private activatedRoute: ActivatedRoute,
		public fullnodeService: FullnodeService,
		private router: Router,
		public userService: UserService,
		private dialog: MatDialog,
		private _changeDetectorRef: ChangeDetectorRef
	){
		//this.fullnodeService.getAddr();
		this.entryForm = fb.group({
			selectedSession: [0.001, Validators.required]
		});
		this.pinForm = fb.group({
			pinValue: [null, Validators.required]
		});
		this.heightUpdate = fullnodeService.heightUpdate;
		this.uZaddrUpdate = userService.uZaddrUpdate;
		this.userUpdate = userService.userUpdate;
		this.userUpdate.subscribe((user) => {
			this.user = user;
		});
		this.txsUpdate = userService.txUpdate;
		this.txsUpdate.subscribe((txs) => {
			this.txs = txs;
		});
	}

	ngOnInit(){
		this.pinError = false;
		//console.log('Activated route data in Component:::', this.activatedRoute.data);
		this.activatedRoute.data.subscribe((addrData) => {
			//console.log('FETCH ADDRESS', addrData);
			this.nodeAddress = addrData.response.addr;
			//console.log('Node addres ', this.nodeAddress);
			this.localToken = localStorage.getItem('s4z_token');
			//console.log(localToken);
			if(this.localToken == null){
				var token = uuidv4();
				localStorage.setItem('s4z_token', token);
				this.localToken = token;
			}
			this.loginCheck();
		});
		this.intervalHolder = setInterval(() => {
			this.fullnodeService.getHeight();
			//this.userService.findUser();
			this.loginCheck();
			this._changeDetectorRef.markForCheck();
		}, 1000 * 75);
	}

	loginCheck(){
		var today = new Date().getTime() / 1000;
		this.userService.findUser();
		this.userService.findPending();
		this.txsUpdate.subscribe((txs) => {
			this.txs = txs;
		});
		this.userUpdate.subscribe((user) => {
			if (user.expiration > today) {
				this.prompt = true;
				console.log('Log in found in blockchain!');
				if (user.validated) {
					this.router.navigate(['/shop']);
				}
			}
		});
	}

	login() {
		//console.log('Dropdown:', this.entryForm.value.selectedSession);
		const dialogConfig = new MatDialogConfig();

		dialogConfig.disableClose = true;
		dialogConfig.autoFocus = true;
		dialogConfig.data = {
			totalZec: this.entryForm.value.selectedSession,
			addr: this.nodeAddress,
			session: this.localToken
		};

		const dialogRef = this.dialog.open(ScanComponent, dialogConfig);
		dialogRef.afterClosed().subscribe((val) => {
			console.log('Awaiting confirmation');
			this.confirmedMemo = val;
			this.heightUpdate.pipe(take(1)).subscribe(block => {
				this.targetBlock = block + 10;
			});
		});
	}

	confirmPin(){
		if (this.user.pin === this.pinForm.value.pinValue) {
			this.userService.validateUser();
			this.router.navigate(['/shop']);
		} else {
			this.pinError = true;
		}
	}

	ngOnDestroy(){
		this.FullnodeSub.unsubscribe();
		this.UserSub.unsubscribe();
		clearInterval(this.intervalHolder);
	}
}