/**
 * 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';
import { FormGroup } from '@angular/forms';

/** Custom Components */
import { SavingsAccountDetailsStepComponent } from '../savings-account-stepper/savings-account-details-step/savings-account-details-step.component';
import { SavingsAccountCurrencyStepComponent } from '../savings-account-stepper/savings-account-currency-step/savings-account-currency-step.component';
import { SavingsAccountDigitalStepComponent } from '../savings-account-stepper/savings-account-digital-step/savings-account-digital-step.component';

/** Custom Services */
import { SavingsService } from '../savings.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 { SavingsAccountPreviewStepComponent } from '../savings-account-stepper/savings-account-preview-step/savings-account-preview-step.component';
import { STANDALONE_SHARED_IMPORTS } from 'app/standalone-shared.module';

/**
 * Create Savings Account Component
 *
 * Wizard-tab UI: Product → Currency → Digital → Preview. Tabs 2-4 are
 * disabled until a product is picked on Tab 1 (matches the prior stepper
 * gate that only rendered later steps once `savingsAccountProductTemplate`
 * was set).
 */
@Component({
  selector: 'mifosx-create-savings-account',
  templateUrl: './create-savings-account.component.html',
  styleUrls: ['./create-savings-account.component.scss'],
  imports: [
    ...STANDALONE_SHARED_IMPORTS,
    MatTabsModule,
    FaIconComponent,
    SavingsAccountDetailsStepComponent,
    SavingsAccountCurrencyStepComponent,
    SavingsAccountDigitalStepComponent,
    SavingsAccountPreviewStepComponent
  ]
})
export class CreateSavingsAccountComponent {
  private route = inject(ActivatedRoute);
  private router = inject(Router);
  private dateUtils = inject(Dates);
  private savingsService = inject(SavingsService);
  private settingsService = inject(SettingsService);
  private alertService = inject(AlertService);

  /** Savings Account Template */
  savingsAccountTemplate: any;
  /** Savings Account Product Template */
  savingsAccountProductTemplate: any;
  /** Currently visible wizard tab (0-indexed). */
  selectedTabIndex = 0;
  /** Total wizard tabs — Product, Currency, Preview. */
  private readonly totalTabs = 3;
  /** Guards against duplicate submissions from a double-click while the create request is in flight. */
  submitting = false;

  @ViewChild(SavingsAccountDetailsStepComponent, { static: true })
  savingsAccountDetailsStep: SavingsAccountDetailsStepComponent;

  @ViewChild(SavingsAccountDigitalStepComponent)
  savingsAccountDigitalStep: SavingsAccountDigitalStepComponent;

  @ViewChild(SavingsAccountCurrencyStepComponent)
  savingsAccountCurrencyStep: SavingsAccountCurrencyStepComponent;

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

  setTemplate($event: any) {
    this.savingsAccountProductTemplate = $event;
  }

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

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

  get savingsAccountDetailsForm() {
    return this.savingsAccountDetailsStep.savingsAccountDetailsForm;
  }

  /** Stub — no term step in this flow */
  get savingsAccountTermsForm(): FormGroup {
    return new FormGroup({});
  }

  get savingsAccount() {
    return {
      ...this.savingsAccountDetailsStep.savingsAccountDetails
    };
  }

  get savingsAccountDigital() {
    return this.savingsAccountDigitalStep?.savingsAccountDigital ?? null;
  }

  submit() {
    if (this.submitting) {
      return;
    }
    const detailsStep = this.savingsAccountDetailsStep;
    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.savingsAccountProductTemplate?.nominationFacility &&
      (this.savingsAccountCurrencyStep?.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.savingsAccountProductTemplate?.introducerRequired && !this.savingsAccountDetailsStep.introducerId) {
      this.alertService.alert({
        type: 'Error',
        message: 'Introducer is required for this product. Please select an introducer before submitting.'
      });
      return;
    }
    if (detailsStep.shareLinkingEnabled && !detailsStep.shareAccountId) {
      this.alertService.alert({
        type: 'Error',
        message: 'Share Linking is enabled — please select the share account to link before submitting.'
      });
      return;
    }
    const locale = this.settingsService.language.code;
    const dateFormat = this.settingsService.dateFormat;
    const monthDayFormat = 'dd MMMM';
    const savingsAccount: any = {
      ...this.savingsAccount,
      charges: [],
      submittedOnDate: this.dateUtils.formatDate(this.savingsAccount.submittedOnDate, dateFormat),
      dateFormat,
      monthDayFormat,
      locale
    };

    // Digital Facilities
    if (this.savingsAccountDigital?.accountFacilityConfig) {
      savingsAccount.accountFacilityConfig = this.savingsAccountDigital.accountFacilityConfig;
    }

    if (this.savingsAccountTemplate.clientId) {
      savingsAccount.clientId = this.savingsAccountTemplate.clientId;
      // Set by "Open account in this branch" for a customer of another branch: the branch this account is held at.
      const accountOfficeId = this.route.snapshot.queryParamMap.get('accountOfficeId');
      if (accountOfficeId) {
        savingsAccount.accountOfficeId = Number(accountOfficeId);
      }
    } else {
      savingsAccount.groupId = this.savingsAccountTemplate.groupId;
    }

    const nominees = this.savingsAccountCurrencyStep?.nominees ?? [];
    if (nominees.length > 0) {
      savingsAccount.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.submitting = true;
    this.savingsService.createSavingsAccount(savingsAccount).subscribe({
      next: (response: any) => {
        this.router.navigate(
          [
            '../',
            response.resourceId
          ],
          { relativeTo: this.route }
        );
      },
      error: (error: any) => {
        this.submitting = false;
        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 account with the selected product. Please choose a different product.'
          });
        } else if (errorCode === 'error.msg.savingsaccount.duplicate.externalId') {
          this.alertService.alert({
            type: 'Error',
            message: 'An account with this External ID already exists. Please use a unique External ID.'
          });
        } else if (
          errorCode === 'error.msg.savingsaccount.share.account.required' ||
          errorCode === 'error.msg.savingsaccount.share.account.not.active.for.client'
        ) {
          this.alertService.alert({
            type: 'Error',
            message: 'Please select an active share account belonging to this client before submitting.'
          });
        }
      }
    });
  }
}