/**
 * Copyright since 2025 Mifos Initiative
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */

import { Component, OnInit, inject } from '@angular/core';
import { UntypedFormBuilder, UntypedFormGroup } from '@angular/forms';
import { catchError, of } from 'rxjs';
import { STANDALONE_SHARED_IMPORTS } from 'app/standalone-shared.module';
import { OrganizationService } from '../organization.service';

const BRANCH_TYPES = [
  { value: 'HEAD_OFFICE', label: 'Head Office' },
  { value: 'BRANCH', label: 'Branch' },
  { value: 'REGIONAL_OFFICE', label: 'Regional Office' },
  { value: 'ZONAL_OFFICE', label: 'Zonal Office' }
];

/**
 * The real-world operational fields behind a branch — code, address, contact, type and working
 * hours — kept as their own screen on top of the stock Manage Offices flow, since m_office (the
 * core Fineract entity) was deliberately left untouched. Pick an office, fill in what real-world
 * UCB branch setup expects, save.
 */
@Component({
  selector: 'mifosx-branch-profile',
  templateUrl: './branch-profile.component.html',
  styleUrls: ['./branch-profile.component.scss'],
  imports: [...STANDALONE_SHARED_IMPORTS]
})
export class BranchProfileComponent implements OnInit {
  private formBuilder = inject(UntypedFormBuilder);
  private organizationService = inject(OrganizationService);

  branchTypes = BRANCH_TYPES;

  offices: any[] = [];
  selectedOfficeId: number | null = null;
  form: UntypedFormGroup;

  loadingOffices = true;
  loadingProfile = false;
  saving = false;
  errorMsg = '';
  successMsg = '';
  lastUpdated: any = null;

  ngOnInit(): void {
    this.form = this.formBuilder.group({
      branchCode: [''],
      branchType: [null],
      address: [''],
      pincode: [''],
      contactPhone: [''],
      contactEmail: [''],
      workingHoursStart: [''],
      workingHoursEnd: [''],
      workingDays: [''],
      ifscCode: [''],
      micrCode: [''],
      latitude: [null],
      longitude: [null]
    });

    this.organizationService
      .getBranchProfiles()
      .pipe(
        catchError((err: any) => {
          this.errorMsg = err?.error?.errors?.[0]?.defaultUserMessage ?? 'Could not load branches.';
          return of([]);
        })
      )
      .subscribe((res: any[]) => {
        this.loadingOffices = false;
        this.offices = res || [];
        if (this.offices.length === 1) {
          this.selectOffice(this.offices[0].officeId);
        }
      });
  }

  selectOffice(officeId: number): void {
    this.selectedOfficeId = officeId;
    this.loadingProfile = true;
    this.errorMsg = '';
    this.successMsg = '';
    this.organizationService
      .getBranchProfile(officeId)
      .pipe(
        catchError((err: any) => {
          this.loadingProfile = false;
          this.errorMsg = err?.error?.errors?.[0]?.defaultUserMessage ?? 'Could not load this branch.';
          return of(null);
        })
      )
      .subscribe((res: any) => {
        this.loadingProfile = false;
        if (!res) return;
        this.form.patchValue({
          branchCode: res.branchCode ?? '',
          branchType: res.branchType ?? null,
          address: res.address ?? '',
          pincode: res.pincode ?? '',
          contactPhone: res.contactPhone ?? '',
          contactEmail: res.contactEmail ?? '',
          workingHoursStart: res.workingHoursStart ?? '',
          workingHoursEnd: res.workingHoursEnd ?? '',
          workingDays: res.workingDays ?? '',
          ifscCode: res.ifscCode ?? '',
          micrCode: res.micrCode ?? '',
          latitude: res.latitude ?? null,
          longitude: res.longitude ?? null
        });
        this.lastUpdated = res.updatedByUsername ? { by: res.updatedByUsername, at: res.updatedAt } : null;
        this.form.markAsPristine();
        // Reflect the just-loaded office in the list so the selector stays accurate without a reload.
        const idx = this.offices.findIndex((o) => o.officeId === officeId);
        if (idx >= 0) this.offices[idx] = res;
      });
  }

  officeLabel(o: any): string {
    return o.branchCode ? `${o.officeName} (${o.branchCode})` : o.officeName;
  }

  submit(): void {
    if (this.saving || !this.selectedOfficeId) return;
    this.saving = true;
    this.errorMsg = '';
    this.successMsg = '';
    this.organizationService
      .updateBranchProfile(this.selectedOfficeId, this.form.value)
      .pipe(
        catchError((err: any) => {
          this.saving = false;
          this.errorMsg = err?.error?.errors?.[0]?.defaultUserMessage ?? 'Could not save this branch.';
          return of(null);
        })
      )
      .subscribe((res: any) => {
        this.saving = false;
        if (!res) return;
        if (res.rollbackTransaction) {
          // Parked for checker approval - the branch profile has not actually changed yet.
          this.successMsg = 'Branch profile update has been submitted for approval.';
          this.form.markAsPristine();
          return;
        }
        this.successMsg = 'Branch profile saved.';
        this.form.markAsPristine();
        // The response is now a CommandProcessingResult, not the updated row (the write goes through
        // the command pipeline) - reload the saved row from the server instead of patching state from
        // this response.
        this.organizationService.getBranchProfile(this.selectedOfficeId!).subscribe((updated: any) => {
          if (!updated) return;
          this.lastUpdated = updated.updatedByUsername
            ? { by: updated.updatedByUsername, at: updated.updatedAt }
            : null;
          const idx = this.offices.findIndex((o) => o.officeId === this.selectedOfficeId);
          if (idx >= 0) this.offices[idx] = updated;
        });
      });
  }
}