import { AfterViewInit, Component, ElementRef, OnInit, ViewChild } from '@angular/core';
import { FormControl, FormGroup, Validators } from '@angular/forms';
import { MatAutocompleteSelectedEvent } from '@angular/material/autocomplete';
import { MatDialog } from '@angular/material/dialog';
import { ActivatedRoute, Router } from '@angular/router';
import { Observable, of as observableOf } from 'rxjs';
import { debounceTime, distinctUntilChanged, map, startWith, switchMap } from 'rxjs/operators';

import { Customer } from '../../core/customer';
import { ToasterService } from '../../core/toaster.service';
import { CustomerService } from '../../customers/customer.service';
import { ConfirmDialogComponent } from '../../shared/confirm-dialog/confirm-dialog.component';
import { GuestBook } from '../guest-book';
import { GuestBookService } from '../guest-book.service';

@Component({
  selector: 'app-guest-book-detail',
  templateUrl: './guest-book-detail.component.html',
  styleUrls: ['./guest-book-detail.component.css'],
})
export class GuestBookDetailComponent implements OnInit, AfterViewInit {
  @ViewChild('phone', { static: true }) phoneElement?: ElementRef;
  form: FormGroup<{
    name: FormControl<string>;
    phone: FormControl<string | Customer>;
    pax: FormControl<number>;
    address: FormControl<string | null>;
    hours: FormControl<number>;
    minutes: FormControl<number>;
  }>;

  item: GuestBook = new GuestBook();
  customers: Observable<Customer[]>;

  constructor(
    private route: ActivatedRoute,
    private router: Router,
    private dialog: MatDialog,
    private toaster: ToasterService,
    private ser: GuestBookService,
    private customerService: CustomerService,
  ) {
    // Create form
    this.form = new FormGroup({
      name: new FormControl('', { validators: Validators.required, nonNullable: true }),
      phone: new FormControl<string | Customer>('', {
        validators: Validators.required,
        nonNullable: true,
      }),
      pax: new FormControl(0, { validators: Validators.required, nonNullable: true }),
      address: new FormControl<string | null>(null),
      hours: new FormControl(0, { validators: [Validators.min(0), Validators.max(23)], nonNullable: true }),
      minutes: new FormControl(0, { validators: [Validators.min(0), Validators.max(59)], nonNullable: true }),
    });
    // Setup Account Autocomplete
    this.customers = this.form.controls.phone.valueChanges.pipe(
      startWith(null),
      map((x) => (x !== null && (x as string).length >= 1 ? x : null)),
      debounceTime(150),
      distinctUntilChanged(),
      switchMap((x) => (x === null ? observableOf([]) : this.customerService.autocomplete(x as string))),
    );
  }

  ngOnInit() {
    this.route.data.subscribe((value) => {
      const data = value as { item: GuestBook };
      this.showItem(data.item);
    });
  }

  ngAfterViewInit() {
    setTimeout(() => {
      if (this.phoneElement !== undefined) {
        this.phoneElement.nativeElement.focus();
      }
    }, 0);
  }

  showItem(item: GuestBook) {
    this.item = item;
    this.form.setValue({
      name: item.name,
      phone: item.phone,
      pax: item.pax,
      address: item.address,
      hours: +item.date.substring(12, 14),
      minutes: +item.date.substring(15, 17),
    });
  }

  save() {
    this.ser.saveOrUpdate(this.getItem()).subscribe(
      () => {
        this.toaster.show('Success', '');
        this.router.navigateByUrl('/guest-book');
      },
      (error) => {
        this.toaster.show('Error', error);
      },
    );
  }

  displayFn(customer?: Customer): string {
    return customer ? customer.phone : '';
  }

  selected(event: MatAutocompleteSelectedEvent): void {
    const customer = event.option.value;
    this.form.patchValue({
      name: customer.name,
      // phone: customer.phone,
      address: customer.address,
    });
  }

  confirmDelete(): void {
    const dialogRef = this.dialog.open(ConfirmDialogComponent, {
      width: '250px',
      data: { title: 'Delete Guest Book Entry?', content: 'Are you sure? This cannot be undone.' },
    });

    dialogRef.afterClosed().subscribe((result: boolean) => {
      if (result) {
        this.delete(this.item.id ?? '');
      }
    });
  }

  delete(id: string) {
    this.ser.delete(id).subscribe({
      complete: () => {
        this.toaster.show('Success', '');
        this.router.navigateByUrl('/guest-book');
      },
      error: (error) => {
        this.toaster.show('Error', error);
      },
    });
  }

  getItem(): GuestBook {
    const formModel = this.form.value;
    this.item.name = formModel.name ?? '';
    if (typeof formModel.phone === 'string') {
      this.item.phone = formModel.phone;
    } else {
      this.item.phone = (formModel.phone as Customer).phone;
    }
    this.item.pax = formModel.pax ?? 0;
    this.item.address = formModel.address ?? null;
    const hours = ('' + (formModel.hours as number)).padStart(2, '0');
    const minutes = ('' + (formModel.minutes as number)).padStart(2, '0');
    this.item.date = this.item.date.substring(0, 12) + hours + ':' + minutes;
    return this.item;
  }
}