/**
 * 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/.
 */

/** Angular Imports */
import { Component, ViewChild, inject } from '@angular/core';
import { Router, ActivatedRoute } from '@angular/router';

/** Custom Components */
import { CurrentAccountDetailsStepComponent } from '../current-account-stepper/current-account-details-step/current-account-details-step.component';
import { CurrentAccountCurrencyStepComponent } from '../current-account-stepper/current-account-currency-step/current-account-currency-step.component';
import { CurrentAccountDigitalStepComponent } from '../current-account-stepper/current-account-digital-step/current-account-digital-step.component';

/** Custom Services */
import { CurrentAccountsService } from '../current-accounts.service';
import { SettingsService } from 'app/settings/settings.service';
import { Dates } from 'app/core/utils/dates';
import { AlertService } from 'app/core/alert/alert.service';
import { MatTabsModule } from '@angular/material/tabs';
import { FaIconComponent } from '@fortawesome/angular-fontawesome';
import { CurrentAccountPreviewStepComponent } from '../current-account-stepper/current-account-preview-step/current-account-preview-step.component';
import { STANDALONE_SHARED_IMPORTS } from 'app/standalone-shared.module';
import { FormGroup } from '@angular/forms';

/**
 * Create Current Account Component
 */
@Component({
  selector: 'mifosx-create-current-account-account',
  templateUrl: './create-current-account.component.html',
  styleUrls: ['./create-current-account.component.scss'],
  imports: [
    ...STANDALONE_SHARED_IMPORTS,
    MatTabsModule,
    FaIconComponent,
    CurrentAccountDetailsStepComponent,
    CurrentAccountCurrencyStepComponent,
    CurrentAccountDigitalStepComponent,
    CurrentAccountPreviewStepComponent
  ]
})
export class CreateCurrentAccountComponent {
  private route = inject(ActivatedRoute);
  private router = inject(Router);
  private dateUtils = inject(Dates);
  private currentAccountsService = inject(CurrentAccountsService);
  private settingsService = inject(SettingsService);
  private alertService = inject(AlertService);

  /** Current Account Template */
  currentAccountTemplate: any;
  /** Current Account Product Template */
  currentAccountProductTemplate: any;
  /** Currently visible wizard tab (0-indexed). */
  selectedTabIndex = 0;
  /** Total wizard tabs — Product, Currency, Preview. */
  private readonly totalTabs = 3;

  @ViewChild(CurrentAccountDetailsStepComponent, { static: true })
  currentAccountDetailsStep: CurrentAccountDetailsStepComponent;

  @ViewChild(CurrentAccountCurrencyStepComponent)
  currentAccountCurrencyStep: CurrentAccountCurrencyStepComponent;

  @ViewChild(CurrentAccountDigitalStepComponent)
  currentAccountDigitalStep: CurrentAccountDigitalStepComponent;

  constructor() {
    this.route.data.subscribe((data: { currentAccountTemplate: any }) => {
      this.currentAccountTemplate = data.currentAccountTemplate;
    });
  }

  /**
   * Sets current account product template.
   */
  setTemplate($event: any) {
    this.currentAccountProductTemplate = $event;
  }

  next(): void {
    if (this.selectedTabIndex < this.totalTabs - 1) {
      this.selectedTabIndex += 1;
    }
  }

  prev(): void {
    if (this.selectedTabIndex > 0) {
      this.selectedTabIndex -= 1;
    }
  }

  /**
   * Retrieves current account details form.
   */
  get currentAccountDetailsForm() {
    return this.currentAccountDetailsStep.currentAccountDetailsForm;
  }

  /** Stub forms needed by preview step inputs */
  get currentAccountTermForm(): FormGroup {
    return new FormGroup({});
  }

  get currentAccountSettingsForm(): FormGroup {
    return new FormGroup({});
  }

  get currentAccountTermsForm(): FormGroup {
    return new FormGroup({});
  }

  get currentAccount() {
    return { ...this.currentAccountDetailsStep.currentAccountDetails };
  }

  get currentAccountDigital() {
    return this.currentAccountDigitalStep?.currentAccountDigital ?? null;
  }

  get currentAccountCurrencyFlags() {
    return {
      balanceSwapOption: this.currentAccountCurrencyStep?.balanceSwapOption ?? false,
      msme: this.currentAccountCurrencyStep?.msme ?? false,
      autoDebitFacility: this.currentAccountCurrencyStep?.autoDebitFacility ?? false
    };
  }

  /**
   * Creates a new current account.
   */
  submit() {
    const detailsStep = this.currentAccountDetailsStep;
    if (detailsStep.selectedAccountStatus === 'JOINT' && detailsStep.totalJointSharePercentage !== 100) {
      this.alertService.alert({
        type: 'Error',
        message: `Total ownership is ${detailsStep.totalJointSharePercentage}%. It must equal 100% before submitting.`
      });
      return;
    }
    if (
      !this.currentAccountDetailsStep.isNonIndividualClient &&
      this.currentAccountProductTemplate?.nominationFacility &&
      (this.currentAccountCurrencyStep?.nominees ?? []).length === 0
    ) {
      this.alertService.alert({
        type: 'Error',
        message: 'Nomination Facility is enabled for this product. Please add at least one nominee before submitting.'
      });
      return;
    }
    if (this.currentAccountProductTemplate?.introducerRequired && !this.currentAccountDetailsStep.introducerId) {
      this.alertService.alert({
        type: 'Error',
        message: 'Introducer is required for this product. Please select an introducer before submitting.'
      });
      return;
    }
    const locale = this.settingsService.language.code;
    const dateFormat = this.settingsService.dateFormat;
    const monthDayFormat = 'dd MMMM';
    const details = this.currentAccount;

    const currentAccount: any = {
      ...details,
      ...this.currentAccountCurrencyStep.currencyStepData,
      ...(this.currentAccountDigitalStep?.currentAccountDigital ?? {}),
      charges: [],
      submittedOnDate: this.dateUtils.formatDate(details.submittedOnDate, dateFormat),
      dateFormat,
      monthDayFormat,
      locale
    };

    if (details.establishmentDate) {
      currentAccount.establishmentDate = this.dateUtils.formatDate(details.establishmentDate, dateFormat);
    }
    if (details.startOperationDate) {
      currentAccount.startOperationDate = this.dateUtils.formatDate(details.startOperationDate, dateFormat);
    }

    // Explicitly re-set partners from the details step to ensure all are included
    if (this.currentAccountDetailsStep.isNonIndividualClient) {
      currentAccount.isNonIndividualClient = true;
      currentAccount.partners = this.currentAccountDetailsStep.relatedClients.map((c: any) => ({
        clientId: c.clientId,
        clientName: c.clientName,
        clientCif: c.clientCif,
        sharePercentage: c.sharePercentage,
        isMandatory: c.isMandatory
      }));
    } else {
      delete currentAccount.isNonIndividualClient;
    }

    if (this.currentAccountTemplate.clientId) {
      currentAccount.clientId = this.currentAccountTemplate.clientId;
    } else {
      currentAccount.groupId = this.currentAccountTemplate.groupId;
    }

    const nominees = this.currentAccountCurrencyStep?.nominees ?? [];
    if (nominees.length > 0) {
      currentAccount.nominees = nominees.map((n: any) => ({
        nomineeClientId: n.nomineeClientId,
        nominationType: n.nominationType,
        relationshipId: n.relationshipId,
        percentageShare: n.percentageShare,
        nomineeIsMinor: n.nomineeIsMinor,
        ...(n.guardianClientId ? { guardianClientId: n.guardianClientId } : {}),
        remarks: n.remarks
      }));
    }

    this.currentAccountsService.createCurrentAccount(currentAccount).subscribe({
      next: (response: any) => {
        this.router.navigate(
          [
            '../',
            response.resourceId
          ],
          { relativeTo: this.route }
        );
      },
      error: (error: any) => {
        const errorCode =
          error?.error?.errors?.[0]?.userMessageGlobalisationCode ?? error?.error?.userMessageGlobalisationCode;
        if (errorCode === 'error.msg.savings.account.duplicate.product.for.client') {
          this.alertService.alert({
            type: 'Error',
            message:
              'This client already has an active Current account with the selected product. Please choose a different product.'
          });
        } else if (errorCode === 'error.msg.savings.account.duplicate.externalid') {
          this.alertService.alert({
            type: 'Error',
            message: 'An account with this External ID already exists. Please use a unique External ID.'
          });
        }
      }
    });
  }
}