import { AfterViewInit, Component, ElementRef, OnInit, ViewChild, inject } from '@angular/core';
import { FormControl, FormGroup, ReactiveFormsModule } from '@angular/forms';
import { MatButtonModule } from '@angular/material/button';
import { MatOptionModule } from '@angular/material/core';
import { MatDialog } from '@angular/material/dialog';
import { MatFormFieldModule } from '@angular/material/form-field';
import { MatInputModule } from '@angular/material/input';
import { MatSelectModule } from '@angular/material/select';
import { MatSnackBar } from '@angular/material/snack-bar';
import { ActivatedRoute, Router } from '@angular/router';
import { round } from 'mathjs';

import { Regime } from '../../core/regime';
import { Tax } from '../../core/tax';
import { ConfirmDialogComponent } from '../../shared/confirm-dialog/confirm-dialog.component';
import { TaxService } from '../tax.service';

@Component({
  selector: 'app-tax-detail',
  templateUrl: './tax-detail.component.html',
  styleUrls: ['./tax-detail.component.css'],
  imports: [MatButtonModule, MatFormFieldModule, MatInputModule, MatOptionModule, MatSelectModule, ReactiveFormsModule],
})
export class TaxDetailComponent implements OnInit, AfterViewInit {
  private route = inject(ActivatedRoute);
  private router = inject(Router);
  private dialog = inject(MatDialog);
  private snackBar = inject(MatSnackBar);
  private ser = inject(TaxService);

  @ViewChild('nameElement', { static: true }) nameElement?: ElementRef;
  form: FormGroup<{
    name: FormControl<string>;
    rate: FormControl<number>;
    regime: FormControl<number>;
  }>;

  item: Tax = new Tax();
  regimes: Regime[] = [];

  constructor() {
    // Create form
    this.form = new FormGroup({
      name: new FormControl<string>('', { nonNullable: true }),
      rate: new FormControl<number>(100, { nonNullable: true }),
      regime: new FormControl<number>(0, { nonNullable: true }),
    });
  }

  ngOnInit() {
    this.route.data.subscribe((value) => {
      const data = value as { item: Tax; regimes: Regime[] };
      this.regimes = data.regimes;
      this.showItem(data.item);
    });
  }

  showItem(item: Tax) {
    this.item = item;
    this.form.setValue({
      name: this.item.name ?? '',
      rate: this.item.rate * 100,
      regime: this.item.regime?.id ?? 0,
    });
  }

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

  save() {
    this.ser.saveOrUpdate(this.getItem()).subscribe({
      next: () => {
        this.snackBar.open('', 'Success');
        this.router.navigateByUrl('/taxes');
      },
      error: (error) => {
        this.snackBar.open(error, 'Error');
      },
    });
  }

  delete() {
    this.ser.delete(this.item.id as string).subscribe({
      next: () => {
        this.snackBar.open('', 'Success');
        this.router.navigateByUrl('/taxes');
      },
      error: (error) => {
        this.snackBar.open(error, 'Error');
      },
    });
  }

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

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

  getItem(): Tax {
    const formModel = this.form.value;
    this.item.name = formModel.name ?? '';
    this.item.rate = round((formModel.rate ?? 0) / 100, 5);
    if (this.item.regime === null || this.item.regime === undefined) {
      this.item.regime = new Regime();
    }
    this.item.regime.id = formModel.regime;
    return this.item;
  }
}