import { AfterViewInit, Component, ElementRef, OnInit, ViewChild } from '@angular/core';
import { FormArray, FormControl, FormGroup } from '@angular/forms';
import { MatDialog } from '@angular/material/dialog';
import { ActivatedRoute, Router } from '@angular/router';
import { round } from 'mathjs';

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

@Component({
  selector: 'app-customer-detail',
  templateUrl: './customer-detail.component.html',
  styleUrls: ['./customer-detail.component.css'],
})
export class CustomerDetailComponent implements OnInit, AfterViewInit {
  @ViewChild('nameElement', { static: true }) nameElement?: ElementRef;
  form: FormGroup<{
    name: FormControl<string>;
    phone: FormControl<string>;
    address: FormControl<string | null>;
    printInBill: FormControl<boolean>;
    discounts: FormArray<
      FormGroup<{
        discount: FormControl<number | null>;
      }>
    >;
  }>;

  item: Customer = new Customer();
  hide: boolean;

  constructor(
    private route: ActivatedRoute,
    private router: Router,
    private toaster: ToasterService,
    private dialog: MatDialog,
    private ser: CustomerService,
  ) {
    this.hide = true;
    // Create form
    this.form = new FormGroup({
      name: new FormControl<string>('', { nonNullable: true }),
      phone: new FormControl<string>('', { nonNullable: true }),
      address: new FormControl<string | null>(null),
      printInBill: new FormControl<boolean>(false, { nonNullable: true }),
      discounts: new FormArray<FormGroup<{ discount: FormControl<number | null> }>>([]),
    });
  }

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

  showItem(item: Customer) {
    this.item = item;
    this.form.controls.name.setValue(item.name);
    this.form.controls.phone.setValue(item.phone);
    this.form.controls.address.setValue(item.address);
    this.form.controls.printInBill.setValue(item.printInBill);
    this.form.controls.discounts.clear();
    this.item.discounts.forEach((x) =>
      this.form.controls.discounts.push(
        new FormGroup({
          discount: new FormControl<number | null>(x.discount ? x.discount * 100 : null),
        }),
      ),
    );
  }

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

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

  delete() {
    this.ser.delete(this.item.id as string).subscribe(
      () => {
        this.toaster.show('Success', '');
        this.router.navigateByUrl('/customers');
      },
      (error) => {
        this.toaster.show('Error', error);
      },
    );
  }

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

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

  getItem(): Customer {
    const formModel = this.form.value;
    this.item.name = formModel.name ?? '';
    this.item.phone = formModel.phone ?? '';
    this.item.address = formModel.address ?? null;
    this.item.printInBill = formModel.printInBill ?? false;

    const array = formModel.discounts;
    if (array) {
      this.item.discounts.forEach((item, index) => {
        const array_item = array.at(index);
        if (array_item && array_item?.discount) {
          item.discount = Math.max(Math.min(round(array_item.discount / 100, 5), 100), 0);
        } else {
          item.discount = null;
        }
      });
    }
    return this.item;
  }
}