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

import { CostCentre } from '../../core/cost-centre';
import { ToasterService } from '../../core/toaster.service';
import { ConfirmDialogComponent } from '../../shared/confirm-dialog/confirm-dialog.component';
import { Employee } from '../employee';
import { EmployeeService } from '../employee.service';

@Component({
  selector: 'app-employee-detail',
  templateUrl: './employee-detail.component.html',
  styleUrls: ['./employee-detail.component.css'],
})
export class EmployeeDetailComponent implements OnInit, AfterViewInit {
  @ViewChild('nameElement', { static: true }) nameElement?: ElementRef;
  form: FormGroup<{
    code: FormControl<string | number>;
    name: FormControl<string | null>;
    designation: FormControl<string | null>;
    salary: FormControl<number | string | null>;
    points: FormControl<number | string | null>;
    isActive: FormControl<boolean>;
    costCentre: FormControl<string | null>;
    joiningDate: FormControl<Date>;
    leavingDate: FormControl<Date | null>;
  }>;

  costCentres: CostCentre[] = [];
  item: Employee = new Employee();

  constructor(
    private route: ActivatedRoute,
    private router: Router,
    private dialog: MatDialog,
    private toaster: ToasterService,
    private ser: EmployeeService,
  ) {
    this.form = new FormGroup({
      code: new FormControl<string | number>({ value: 0, disabled: true }, { nonNullable: true }),
      name: new FormControl<string | null>(null),
      designation: new FormControl<string | null>(null),
      salary: new FormControl<number | string | null>(null),
      points: new FormControl<number | string | null>(null),
      isActive: new FormControl<boolean>(true, { nonNullable: true }),
      costCentre: new FormControl<string | null>(null),
      joiningDate: new FormControl(new Date(), { nonNullable: true }),
      leavingDate: new FormControl<Date | null>(null),
    });
    // Listen to IsActive Changes
    this.form.controls.isActive.valueChanges.subscribe((x) => {
      this.item.isActive = x;
    });
  }

  ngOnInit() {
    this.route.data.subscribe((value) => {
      const data = value as { item: Employee; costCentres: CostCentre[] };

      this.costCentres = data.costCentres;
      this.showItem(data.item);
    });
  }

  showItem(item: Employee) {
    this.item = item;
    this.form.setValue({
      code: this.item.code || '(Auto)',
      name: this.item.name || '',
      designation: this.item.designation || '',
      salary: this.item.salary || '',
      points: this.item.points || '',
      isActive: this.item.isActive,
      costCentre: this.item.costCentre.id ?? '',
      joiningDate: this.item.joiningDate ? moment(this.item.joiningDate, 'DD-MMM-YYYY').toDate() : new Date(),
      leavingDate: this.item.isActive ? null : moment(this.item.leavingDate, 'DD-MMM-YYYY').toDate(),
    });
  }

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

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

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

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

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

  getItem(): Employee {
    const formValue = this.form.value;
    this.item.name = formValue.name ?? '';
    this.item.designation = formValue.designation ?? '';
    this.item.salary = Number(formValue.salary);
    this.item.points = Number(formValue.points);
    this.item.isActive = formValue.isActive ?? true;
    this.item.costCentre.id = formValue.costCentre ?? '';
    this.item.joiningDate = moment(formValue.joiningDate).format('DD-MMM-YYYY');
    this.item.leavingDate = this.item.isActive ? null : moment(formValue.leavingDate).format('DD-MMM-YYYY');
    return this.item;
  }
}