import { Component, inject, afterNextRender, linkedSignal, input, computed } from '@angular/core';
import { form, FormField, FormRoot } from '@angular/forms/signals';
import { MatButtonModule } from '@angular/material/button';
import { MatCheckboxModule } from '@angular/material/checkbox';
import { MatOptionModule } from '@angular/material/core';
import { MatDialog } from '@angular/material/dialog';
import { MatFormFieldModule } from '@angular/material/form-field';
import { MatIconModule } from '@angular/material/icon';
import { MatInputModule } from '@angular/material/input';
import { MatSelectModule } from '@angular/material/select';
import { MatSnackBar } from '@angular/material/snack-bar';
import { Router } from '@angular/router';

import { Account } from '../../core/account';
import { AccountService } from '../../core/account.service';
import { CostCentreService } from '../../cost-centre/cost-centre.service';
import { ConfirmDialogComponent } from '../../shared/confirm-dialog/confirm-dialog.component';
import { ErrorStateComponent } from '../../shared/error-state/error-state.component';
import { SkeletonLoaderComponent } from '../../shared/skeleton-loader/skeleton-loader.component';
import { AccountTypeService } from '../account-type.service';

export interface AccountDetailFormData {
  code: string;
  name: string;
  type: number;
  isActive: boolean;
  isReconcilable: boolean;
  costCentre: string;
}

@Component({
  selector: 'app-account-detail',
  templateUrl: './account-detail.component.html',
  styleUrls: ['./account-detail.component.css'],
  imports: [
    MatIconModule,
    MatFormFieldModule,
    MatInputModule,
    MatSelectModule,
    MatOptionModule,
    MatCheckboxModule,
    MatButtonModule,
    FormField,
    FormRoot,
    SkeletonLoaderComponent,
    ErrorStateComponent,
  ],
})
export class AccountDetailComponent {
  private router = inject(Router);
  private dialog = inject(MatDialog);
  private snackBar = inject(MatSnackBar);
  private ser = inject(AccountService);
  private accountTypeService = inject(AccountTypeService);
  private costCentreService = inject(CostCentreService);
  id = input(null, { transform: (v: string | null | undefined) => v ?? null });

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

  item = computed(() => this.itemResource.value() ?? new Account());

  accountModel = linkedSignal({
    source: this.item,
    computation: (itemVal): AccountDetailFormData => {
      return {
        code: (itemVal.code || '(Auto)').toString(),
        name: itemVal.name || '',
        type: itemVal.type ?? 0,
        isActive: itemVal.isActive ?? true,
        isReconcilable: itemVal.isReconcilable ?? false,
        costCentre: itemVal.costCentre?.id ?? '',
      };
    },
  });

  accountForm = form(this.accountModel);

  accountTypesResource = this.accountTypeService.list();
  costCentresResource = this.costCentreService.list();
  accountTypes = computed(() => this.accountTypesResource.value() || []);
  costCentres = computed(() => this.costCentresResource.value() || []);

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

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

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

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

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

  getItem(): Account {
    const formModel = this.accountModel();
    const item = this.item();
    item.name = formModel.name ?? '';
    item.type = formModel.type ?? 0;
    item.isActive = formModel.isActive ?? true;
    item.isReconcilable = formModel.isReconcilable ?? false;
    item.costCentre.id = formModel.costCentre ?? '';
    return item;
  }
}