import {AfterViewInit, Component, ElementRef, OnInit, ViewChild} from '@angular/core';
import {FormBuilder, FormGroup} from '@angular/forms';
import {MatDialog} from '@angular/material';
import {ActivatedRoute, Router} from '@angular/router';

import * as moment from 'moment';

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

@Component({
  selector: 'app-employee-detail',
  templateUrl: './employee-detail.component.html',
  styleUrls: ['./employee-detail.component.css']
})
export class EmployeeDetailComponent implements OnInit, AfterViewInit {
  @ViewChild('nameElement') nameElement: ElementRef;
  form: FormGroup;
  costCentres: CostCentre[];
  item: Employee;

  constructor(
    private route: ActivatedRoute,
    private router: Router,
    private dialog: MatDialog,
    private fb: FormBuilder,
    private toaster: ToasterService,
    private ser: EmployeeService
  ) {
    this.createForm();
    this.listenToIsActiveChanges();
  }

  createForm() {
    this.form = this.fb.group({
      code: {value: '', disabled: true},
      name: '',
      designation: '',
      salary: '',
      points: '',
      isActive: '',
      costCentre: '',
      joiningDate: '',
      leavingDate: ''
    });
  }

  ngOnInit() {
    this.route.data
      .subscribe((data: { 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() : '',
      leavingDate: this.item.isActive ? null : moment(this.item.leavingDate, 'DD-MMM-YYYY').toDate()
    });
  }

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

  listenToIsActiveChanges(): void {
    this.form.get('isActive').valueChanges
      .subscribe(x => this.item.isActive = x);
  }

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

  delete() {
    this.ser.delete(this.item.id)
      .subscribe(
        (result) => {
          this.toaster.show('Success', '');
          this.router.navigateByUrl('/Employees');
        },
        (error) => {
          this.toaster.show('Danger', error.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 formModel = this.form.value;
    this.item.name = formModel.name;
    this.item.designation = formModel.designation;
    this.item.salary = formModel.salary;
    this.item.points = formModel.points;
    this.item.isActive = formModel.isActive;
    this.item.costCentre.id = formModel.costCentre;
    this.item.joiningDate = moment(formModel.joiningDate).format('DD-MMM-YYYY');
    this.item.leavingDate = (this.item.isActive) ? null : moment(formModel.leavingDate).format('DD-MMM-YYYY');
    return this.item;
  }
}