/**
 * 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 { ActivatedRoute, Router } from '@angular/router';

/** Custom Services */
import { FixedDepositsService } from '../fixed-deposits.service';
import { SettingsService } from 'app/settings/settings.service';
import { AlertService } from 'app/core/alert/alert.service';
import { ProductsService } from 'app/products/products.service';

/** Custom Components */
import { FixedDepositAccountDetailsStepComponent } from '../fixed-deposit-account-stepper/fixed-deposit-account-details-step/fixed-deposit-account-details-step.component';
import { FixedDepositAccountCurrencyStepComponent } from '../fixed-deposit-account-stepper/fixed-deposit-account-currency-step/fixed-deposit-account-currency-step.component';
import { Dates } from 'app/core/utils/dates';
import { MatTabsModule } from '@angular/material/tabs';
import { FaIconComponent } from '@fortawesome/angular-fontawesome';
import { FixedDepositAccountInterestRateChartStepComponent } from '../fixed-deposit-account-stepper/fixed-deposit-account-interest-rate-chart-step/fixed-deposit-account-interest-rate-chart-step.component';
import { FixedDepositAccountPreviewStepComponent } from '../fixed-deposit-account-stepper/fixed-deposit-account-preview-step/fixed-deposit-account-preview-step.component';
import { FixedDepositAccountMaturityTermsStepComponent } from '../fixed-deposit-account-stepper/fixed-deposit-account-maturity-terms-step/fixed-deposit-account-maturity-terms-step.component';
import { STANDALONE_SHARED_IMPORTS } from 'app/standalone-shared.module';

/**
 * Create Fixed Deposit Account Component
 */
@Component({
  selector: 'mifosx-create-fixed-deposit-account',
  templateUrl: './create-fixed-deposit-account.component.html',
  styleUrls: ['./create-fixed-deposit-account.component.scss'],
  imports: [
    ...STANDALONE_SHARED_IMPORTS,
    MatTabsModule,
    FaIconComponent,
    FixedDepositAccountDetailsStepComponent,
    FixedDepositAccountInterestRateChartStepComponent,
    FixedDepositAccountCurrencyStepComponent,
    FixedDepositAccountMaturityTermsStepComponent,
    FixedDepositAccountPreviewStepComponent
  ]
})
export class CreateFixedDepositAccountComponent {
  private route = inject(ActivatedRoute);
  private router = inject(Router);
  private dateUtils = inject(Dates);
  private fixedDepositsService = inject(FixedDepositsService);
  private settingsService = inject(SettingsService);
  private alertService = inject(AlertService);
  private productsService = inject(ProductsService);

  @ViewChild(FixedDepositAccountDetailsStepComponent, { static: true })
  fixedDepositsAccountDetailsStep: FixedDepositAccountDetailsStepComponent;
  @ViewChild(FixedDepositAccountCurrencyStepComponent)
  fixedDepositAccountCurrencyStep: FixedDepositAccountCurrencyStepComponent;
  @ViewChild(FixedDepositAccountPreviewStepComponent)
  fixedDepositAccountPreviewStep: FixedDepositAccountPreviewStepComponent;
  @ViewChild(FixedDepositAccountMaturityTermsStepComponent)
  fixedDepositAccountMaturityTermsStep: FixedDepositAccountMaturityTermsStepComponent;

  /** Fixed Deposits Account Template */
  fixedDepositsAccountTemplate: any;
  /** Fixed Deposit Account Product Template */
  fixedDepositsAccountProductTemplate: any;
  /** Currently visible wizard tab (0-indexed). */
  selectedTabIndex = 0;
  /** Total wizard tabs — Product, Currency, Chart, Terms, Preview. */
  private readonly totalTabs = 5;
  /** Active CBS base interest rate versions for the selected product's FD type */
  cbsBaseRates: any[] = [];
  /** Tenure selected from the interest rate chart step */
  selectedTenure: {
    depositPeriod: number;
    depositPeriodFrequencyId: number;
    depositAmount?: number;
    maturityAmount?: number;
    interestEarned?: number;
    appliedRate?: number;
    isSeniorCitizen?: boolean;
  } | null = null;

  /**
   * Fetches FD account template from `resolve`
   * @param {ActivatedRoute} route Activated Route
   * @param {Router} router Router
   * @param {Dates} dateUtils Date Utils
   * @param {FixedDepositsService} fixedDepositsService Fixed Deposits Service
   * @param {SettingsService} settingsService Settings Service
   */
  constructor() {
    this.route.data.subscribe((data: { fixedDepositsAccountTemplate: any }) => {
      this.fixedDepositsAccountTemplate = data.fixedDepositsAccountTemplate;
    });
  }

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

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

  /**
   * Sets fixed deposits account product template.
   * @param {any} $event API response
   */
  setTemplate($event: any) {
    this.fixedDepositsAccountProductTemplate = $event;
    const fdType = $event?.fdType;
    this.productsService.getFdBaseInterestRates(fdType).subscribe({
      next: (rates: any[]) => (this.cbsBaseRates = rates || []),
      error: () => (this.cbsBaseRates = [])
    });
  }

  onTenureSelected($event: {
    depositPeriod: number;
    depositPeriodFrequencyId: number;
    depositAmount?: number;
    maturityAmount?: number;
    interestEarned?: number;
    appliedRate?: number;
    isSeniorCitizen?: boolean;
  }) {
    this.selectedTenure = $event;
  }

  /**
   * Retrieves Fixed Deposit Account Details Form Data
   */
  get fixedDepositAccountDetailsForm() {
    return this.fixedDepositsAccountDetailsStep?.fixedDepositAccountDetailsForm;
  }

  /**
   * Checks stepper validity.
   */
  get fixedDepositAccountFormValid() {
    return !!this.fixedDepositAccountDetailsForm?.valid;
  }

  /**
   * Creates the fixed deposit account object.
   */
  get fixedDepositAccount() {
    return {
      ...this.fixedDepositsAccountDetailsStep?.fixedDepositAccountDetails,
      ...this.fixedDepositAccountCurrencyStep?.currencyStepData
    };
  }

  get submittedOnDate(): Date | null {
    const val = this.fixedDepositsAccountDetailsStep?.fixedDepositAccountDetails?.submittedOnDate;
    return val ? new Date(val) : null;
  }

  /**
   * Submits the fixed deposit form and creates a new fixed deposit account
   */
  submit() {
    const detailsStep = this.fixedDepositsAccountDetailsStep;
    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.fixedDepositsAccountProductTemplate?.nominationFacility &&
      (this.fixedDepositAccountCurrencyStep?.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.selectedTenure || !this.selectedTenure.depositPeriod) {
      this.alertService.alert({
        type: 'Error',
        message: 'Please enter the Deposit Tenure and click "Find Rate" before submitting.'
      });
      return;
    }
    if (!detailsStep?.selectedCustomerSegment) {
      this.alertService.alert({ type: 'Error', message: 'Please select a Customer Segment before submitting.' });
      return;
    }
    const locale = this.settingsService.language.code;
    const dateFormat = this.settingsService.dateFormat;
    const monthDayFormat = 'dd MMMM';
    const pt = this.fixedDepositsAccountProductTemplate;

    // Terms — pulled from product template
    const terms: any = {};
    if (pt?.nominalAnnualInterestRate != null) terms.nominalAnnualInterestRate = pt.nominalAnnualInterestRate;
    if (pt?.interestCompoundingPeriodType?.id != null)
      terms.interestCompoundingPeriodType = pt.interestCompoundingPeriodType.id;
    if (pt?.interestPostingPeriodType?.id != null) terms.interestPostingPeriodType = pt.interestPostingPeriodType.id;
    if (pt?.interestCalculationType?.id != null) terms.interestCalculationType = pt.interestCalculationType.id;
    if (pt?.interestCalculationDaysInYearType?.id != null)
      terms.interestCalculationDaysInYearType = pt.interestCalculationDaysInYearType.id;

    // Deposit amount: Prefer user input from Rate Calculator, fallback to product template
    if (this.selectedTenure?.depositAmount != null) {
      terms.depositAmount = this.selectedTenure.depositAmount;
    } else if (pt?.depositAmount != null) {
      terms.depositAmount = pt.depositAmount;
    }

    if (pt?.minDepositAmount != null) terms.minDepositAmount = pt.minDepositAmount;
    if (pt?.maxDepositAmount != null) terms.maxDepositAmount = pt.maxDepositAmount;

    // Settings — pulled from product template
    const settings: any = {};
    if (pt?.lockinPeriodFrequency != null) settings.lockinPeriodFrequency = pt.lockinPeriodFrequency;
    if (pt?.lockinPeriodFrequencyType?.id != null) settings.lockinPeriodFrequencyType = pt.lockinPeriodFrequencyType.id;
    if (pt?.minDepositTerm != null) settings.minDepositTerm = pt.minDepositTerm;
    if (pt?.minDepositTermType?.id != null) settings.minDepositTermTypeId = pt.minDepositTermType.id;
    if (pt?.inMultiplesOfDepositTerm != null) settings.inMultiplesOfDepositTerm = pt.inMultiplesOfDepositTerm;
    if (pt?.inMultiplesOfDepositTermType?.id != null)
      settings.inMultiplesOfDepositTermTypeId = pt.inMultiplesOfDepositTermType.id;
    if (pt?.maxDepositTerm != null) settings.maxDepositTerm = pt.maxDepositTerm;
    if (pt?.maxDepositTermType?.id != null) settings.maxDepositTermTypeId = pt.maxDepositTermType.id;
    if (pt?.preClosurePenalApplicable != null) settings.preClosurePenalApplicable = pt.preClosurePenalApplicable;
    if (pt?.preClosurePenalInterest != null) settings.preClosurePenalInterest = pt.preClosurePenalInterest;
    if (pt?.preClosurePenalInterestOnType?.id != null)
      settings.preClosurePenalInterestOnTypeId = pt.preClosurePenalInterestOnType.id;
    if (pt?.maturityInstructionId != null) settings.maturityInstructionId = pt.maturityInstructionId;
    if (pt?.transferInterestToSavings != null) settings.transferInterestToSavings = pt.transferInterestToSavings;
    if (pt?.withHoldTax != null) settings.withHoldTax = pt.withHoldTax;

    // Charges — from product template if not overridden in details
    const rawCharges: any[] =
      (this.fixedDepositAccount.charges?.length ? this.fixedDepositAccount.charges : pt?.charges) ?? [];

    const fixedDepositAccount = {
      ...this.fixedDepositAccount,
      ...terms,
      ...settings,
      ...(this.fixedDepositAccountMaturityTermsStep?.closureSettings ?? {}),
      ...(this.selectedTenure
        ? {
            depositPeriod: this.selectedTenure.depositPeriod,
            depositPeriodFrequencyId: this.selectedTenure.depositPeriodFrequencyId
          }
        : {}),
      clientId: this.fixedDepositsAccountTemplate.clientId,
      charges: rawCharges.map((charge: any) => ({
        chargeId: charge.chargeId ?? charge.id,
        amount: charge.amount,
        dueDate: charge.dueDate && this.dateUtils.formatDate(charge.dueDate, dateFormat),
        feeOnMonthDay:
          charge.feeOnMonthDay && this.dateUtils.formatDate([2000].concat(charge.feeOnMonthDay), monthDayFormat),
        feeInterval: charge.feeInterval
      })),
      submittedOnDate: this.dateUtils.formatDate(this.fixedDepositAccount.submittedOnDate, dateFormat),
      charts: [{ chartSlabs: pt?.accountChart?.chartSlabs ?? [] }],
      dateFormat,
      monthDayFormat,
      locale
    };
    const nominees = this.fixedDepositAccountCurrencyStep?.nominees ?? [];
    if (nominees.length > 0) {
      fixedDepositAccount.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
      }));
    }

    // Senior citizen rate override
    if (
      this.selectedTenure?.isSeniorCitizen &&
      this.selectedTenure.appliedRate != null &&
      this.selectedTenure.appliedRate > 0
    ) {
      fixedDepositAccount.isSeniorCitizen = true;
      fixedDepositAccount.seniorCitizenInterestRate = this.selectedTenure.appliedRate;
      fixedDepositAccount.nominalAnnualInterestRate = this.selectedTenure.appliedRate;
    }

    this.fixedDepositsService.createFixedDepositAccount(fixedDepositAccount).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 Fixed Deposit 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.'
          });
        }
      }
    });
  }
}