import { Component, computed, inject, linkedSignal, input, afterNextRender } from '@angular/core';
import { form, FormField } from '@angular/forms/signals';
import { MatButtonModule } from '@angular/material/button';
import { MatDialog } from '@angular/material/dialog';
import { MatFormFieldModule } from '@angular/material/form-field';
import { MatInputModule } from '@angular/material/input';
import { MatSnackBar } from '@angular/material/snack-bar';
import { ActivatedRoute, Router } from '@angular/router';

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

export interface RegimeDetailFormData {
  name: string;
  header: string;
  prefix: string;
}

@Component({
  selector: 'app-regime-detail',
  templateUrl: './regime-detail.component.html',
  styleUrls: ['./regime-detail.component.css'],
  imports: [MatButtonModule, MatFormFieldModule, MatInputModule, FormField],
})
export class RegimeDetailComponent {
  private route = inject(ActivatedRoute);
  private router = inject(Router);
  private dialog = inject(MatDialog);
  private snackBar = inject(MatSnackBar);
  private ser = inject(RegimeService);
  id = input(null, { transform: (v: string | null | undefined) => (v ? +v : null) });

  itemResource = this.ser.get(this.id);

  item = computed(() => this.itemResource.value() ?? new Regime());
  formModel = linkedSignal({
    source: this.item,
    computation: (itemVal): RegimeDetailFormData => {
      return {
        name: itemVal.name ?? '',
        header: itemVal.header ?? '',
        prefix: itemVal.prefix ?? '',
      };
    },
  });

  form = form(this.formModel);

  constructor() {
    afterNextRender(() => {
      this.form().focusBoundControl();
    });
  }

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

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

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

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

  getItem(): Regime {
    const formModel = this.formModel();
    return new Regime({
      ...this.item(),
      name: formModel.name ?? '',
      header: formModel.header ?? '',
      prefix: formModel.prefix ?? '',
    });
  }
}