/**
 * 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, Input, OnChanges, SimpleChanges, inject } from '@angular/core';
import { UntypedFormGroup, UntypedFormBuilder, UntypedFormControl, Validators } from '@angular/forms';
import { MatCheckbox } from '@angular/material/checkbox';
import { MatIcon } from '@angular/material/icon';
import { MatIconButton } from '@angular/material/button';
import { STANDALONE_SHARED_IMPORTS } from 'app/standalone-shared.module';

/**
 * Fixed Deposit Account Maturity Terms Step -- what happens to this account at maturity
 * (Withdraw / Transfer to Savings / Reinvest) and the pre-mature-closure penalty, decided
 * per account rather than silently inherited from the product.
 */
@Component({
  selector: 'mifosx-fixed-deposit-account-maturity-terms-step',
  templateUrl: './fixed-deposit-account-maturity-terms-step.component.html',
  styleUrls: ['./fixed-deposit-account-maturity-terms-step.component.scss'],
  imports: [
    ...STANDALONE_SHARED_IMPORTS,
    MatCheckbox,
    MatIcon,
    MatIconButton
  ]
})
export class FixedDepositAccountMaturityTermsStepComponent implements OnChanges {
  private formBuilder = inject(UntypedFormBuilder);

  @Input() fixedDepositsAccountTemplate: any;
  @Input() fixedDepositsAccountProductTemplate: any;
  /** Account already linked elsewhere in the wizard (the Details step's Deposit Account Link) --
   * pre-fills Transfer to Savings so the officer doesn't have to pick the same account twice. */
  @Input() linkedSavingsAccountId: number | null = null;

  closureSettingsForm: UntypedFormGroup;
  maturityInstructionOptions: any[] = [];
  savingsAccountsData: any[] = [];
  preClosurePenalInterestOnTypeData: any[] = [];

  constructor() {
    this.closureSettingsForm = this.formBuilder.group({
      maturityInstructionId: [''],
      preClosurePenalApplicable: [false],
      preClosurePenalInterest: [
        '',
        Validators.min(0)
      ],
      preClosurePenalInterestOnTypeId: ['']
    });
    this.closureSettingsForm.get('maturityInstructionId').valueChanges.subscribe((value: number) => {
      // 200 = Transfer to Savings -- the whole matured balance goes here. 400 = Reinvest Principal
      // Only -- the principal rolls into a new FD, but the leftover interest still needs the same
      // kind of target so it isn't left stranded on the closed account (a real gap the account used
      // to silently hit before this field also asked for it here). Reinvest Principal + Interest
      // (300) rolls the whole balance into the same account, so it never needs a target at all.
      if (value === 200 || value === 400) {
        this.closureSettingsForm.addControl(
          'transferToSavingsId',
          new UntypedFormControl(this.linkedSavingsAccountId ?? '', Validators.required)
        );
      } else {
        this.closureSettingsForm.removeControl('transferToSavingsId');
      }
    });
  }

  ngOnChanges(changes: SimpleChanges) {
    if (changes.linkedSavingsAccountId) {
      const control = this.closureSettingsForm.get('transferToSavingsId');
      if (control && !control.value && this.linkedSavingsAccountId) {
        control.setValue(this.linkedSavingsAccountId);
      }
    }
    if (this.fixedDepositsAccountProductTemplate) {
      // Withdraw Deposit (id 100) books the maturity proceeds out of the bank's cash/vault the moment
      // the account matures, before the customer has actually collected it -- disabled everywhere.
      this.maturityInstructionOptions = (
        this.fixedDepositsAccountProductTemplate.maturityInstructionOptions ?? []
      ).filter((option: any) => option.id !== 100);
      this.savingsAccountsData = this.fixedDepositsAccountProductTemplate.savingsAccounts ?? [];
      this.preClosurePenalInterestOnTypeData =
        this.fixedDepositsAccountProductTemplate.preClosurePenalInterestOnTypeOptions ?? [];
      if (!this.closureSettingsForm.get('preClosurePenalApplicable').dirty) {
        this.closureSettingsForm.patchValue({
          preClosurePenalApplicable: this.fixedDepositsAccountProductTemplate.preClosurePenalApplicable ?? false,
          preClosurePenalInterest: this.fixedDepositsAccountProductTemplate.preClosurePenalInterest ?? '',
          preClosurePenalInterestOnTypeId:
            this.fixedDepositsAccountProductTemplate.preClosurePenalInterestOnType?.id ?? ''
        });
      }
    }
    // Editing an existing account: its own already-saved Maturity Instructions choice lives on
    // `fixedDepositsAccountTemplate` (the real account+template GET, FixedDepositAccountData's
    // `onAccountClosure`) -- NOT on `fixedDepositsAccountProductTemplate`, which is only the blank
    // per-product default template refetched from the Product dropdown's own productId (via
    // getFixedDepositsAccountTemplate(clientId, productId)) and carries no account-specific data at
    // all. This was never read from the right place before, so Edit always opened onto a blank
    // picker even for an account that really does have an instruction saved. `.dirty` guards it the
    // same way the penal-interest fields above do, so a maker's own in-progress edit here is never
    // silently overwritten if this input fires again mid-edit.
    if (this.fixedDepositsAccountTemplate && !this.closureSettingsForm.get('maturityInstructionId').dirty) {
      this.closureSettingsForm
        .get('maturityInstructionId')
        ?.setValue(this.fixedDepositsAccountTemplate.onAccountClosure?.id ?? '');
      const transferControl = this.closureSettingsForm.get('transferToSavingsId');
      if (transferControl) {
        transferControl.setValue(
          this.fixedDepositsAccountTemplate.transferToSavingsId ?? this.linkedSavingsAccountId ?? ''
        );
      }
    }
  }

  /** The linked-savings account for the transfer-to-savings / reinvest-principal-only-interest
   *  maturity instruction, once picked. */
  get selectedTransferAccount(): any {
    const id = this.closureSettingsForm.value.transferToSavingsId;
    if (!id) return null;
    return this.savingsAccountsData.find((account: any) => account.id === id) ?? null;
  }

  get transferAccountCardTitle(): string {
    return this.closureSettingsForm.value.maturityInstructionId === 400
      ? 'Interest payout account'
      : 'Transfer to savings account';
  }

  get transferAccountCardSubtitle(): string {
    return this.closureSettingsForm.value.maturityInstructionId === 400
      ? 'The principal renews into a new FD; interest earned is paid out to this account.'
      : 'Maturity proceeds will be credited to this account.';
  }

  clearTransferAccount(): void {
    this.closureSettingsForm.get('transferToSavingsId')?.setValue('');
  }

  /** Chosen maturity/closure settings, ready to merge into the submit payload. */
  get closureSettings() {
    const settings = this.closureSettingsForm.getRawValue();
    for (const key in settings) {
      if (settings[key] === '') {
        delete settings[key];
      }
    }
    return settings;
  }
}