/**
 * 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 { Injectable, inject } from '@angular/core';
import { HttpClient, HttpParams } from '@angular/common/http';

/** rxjs Imports */
import { Observable } from 'rxjs';

/**
 * Fixed Deposits Service.
 */
@Injectable({
  providedIn: 'root'
})
export class FixedDepositsService {
  private http = inject(HttpClient);

  /**
   * @param accountId Account Id.
   * @returns {Observable<any>} Fixed Deposits data.
   */
  getFixedDepositsAccountData(accountId: string): Observable<any> {
    const httpParams = new HttpParams().set('associations', 'all');
    return this.http.get(`/fixeddepositaccounts/${accountId}`, { params: httpParams });
  }

  /**
   * @param {string} accountId fixed deposits account Id
   * @returns {Observable<any>}
   */
  deleteFixedDepositsAccount(accountId: string): Observable<any> {
    return this.http.delete(`/fixeddepositaccounts/${accountId}`);
  }

  /**
   * @param {string} accountId Account Id
   * @param {string} command Command
   * @param {any} data Data
   * @returns {Observable<any>}
   */
  executeFixedDepositsAccountCommand(accountId: string, command: string, data: any): Observable<any> {
    const httpParams = new HttpParams().set('command', command);
    return this.http.post(`/fixeddepositaccounts/${accountId}`, data, { params: httpParams });
  }

  /**
   * @param {string} accountId Fixed Deposits Account Id
   * @param {string} transactionId Transaction Id
   * @returns {Observable<any>}
   */
  getFixedDepositsAccountTransaction(accountId: string, transactionId: string): Observable<any> {
    return this.http.get(`/fixeddepositaccounts/${accountId}/transactions/${transactionId}`);
  }

  /**
   * @param {string} accountId Fixed Deposits Account Id
   * @param {string} command Command
   * @param {any} data Data
   * @param {string} transactionId Transaction Id
   * @returns {Observable<any>}
   */
  executeFixedDepositsAccountTransactionsCommand(
    accountId: string,
    command: string,
    data: any,
    transactionId?: any
  ): Observable<any> {
    const httpParams = new HttpParams().set('command', command);
    return this.http.post(`/fixeddepositaccounts/${accountId}/transactions/${transactionId}`, data, {
      params: httpParams
    });
  }

  /**
   * @param {string} accountId Fixed Deposits Account Id
   * @returns {Observable<any>}
   */
  getFixedDepositsAccountClosureTemplate(accountId: string): Observable<any> {
    const httpParams = new HttpParams().set('command', 'close');
    return this.http.get(`/fixeddepositaccounts/${accountId}/template`, { params: httpParams });
  }

  /**
   * Template for the Payment action. Same shape as the closure template, but its `onAccountClosureOptions` also
   * include Partial Re-Invest, which the closure commands exclude because only Payment implements it.
   * @param {string} accountId Fixed Deposits Account Id
   * @returns {Observable<any>}
   */
  getFixedDepositsAccountPaymentTemplate(accountId: string): Observable<any> {
    const httpParams = new HttpParams().set('command', 'payment');
    return this.http.get(`/fixeddepositaccounts/${accountId}/template`, { params: httpParams });
  }

  /**
   * @param {string} accountId Fixed Deposits Account Id
   * @returns {Observable<any>}
   */
  getFixedDepositsAccountTransactionTemplate(accountId: string): Observable<any> {
    return this.http.get(`/fixeddepositaccounts/${accountId}/transactions/template`);
  }

  /**
   * @param clientId Client Id assosciated with fixed deposits account.
   * @returns {Observable<any>} Fixed Deposits account template.
   */
  getFixedDepositsAccountTemplate(clientId: string, productId?: string): Observable<any> {
    let httpParams = new HttpParams().set('clientId', clientId);
    httpParams = productId ? httpParams.set('productId', productId) : httpParams;
    return this.http.get('/fixeddepositaccounts/template', { params: httpParams });
  }

  /**
   * @param {string} accountId Fixed Deposits Account Id
   * @returns {Observable<any>}
   */
  getFixedDepositsAccountAndTemplate(accountId: any) {
    const httpParams = new HttpParams().set('associations', 'charges,+linkedAccount').set('template', 'true');
    return this.http.get(`/fixeddepositaccounts/${accountId}`, { params: httpParams });
  }

  /**
   * Calculate FD maturity using backend formula.
   * When submittedOnDate + daysInYear are provided, uses exact calendar-based calculation
   * matching the actual account creation engine.
   */
  calculateFixedDepositInterest(params: {
    principalAmount: number;
    annualInterestRate: number;
    tenureInMonths?: number;
    tenureInDays?: number; // alternative to tenureInMonths, for sub-month FD Single tenures
    interestCompoundingPeriodInMonths: number;
    interestPostingPeriodInMonths: number;
    submittedOnDate?: string; // yyyy-MM-dd — enables exact calendar calculation
    daysInYear?: number; // 360 or 365
  }): Observable<any> {
    let httpParams = new HttpParams();
    Object.entries(params).forEach(
      ([
        key,
        val
      ]) => {
        if (val !== undefined && val !== null) {
          httpParams = httpParams.set(key, String(val));
        }
      }
    );
    return this.http.get(`/fixeddepositaccounts/calculate-fd-interest`, { params: httpParams });
  }

  /**
   * FD Dashboard's "Renew" action on a matured FD whose product has a renewal grace period
   * configured: backdated to the original maturity date within the grace window, or from today
   * with a gap-period interest credit (at the linked Savings account's rate) once it has passed.
   * @param accountId Fixed Deposit Account Id
   * @returns {Observable<any>} { renewedAccountId, maturityDate, maturityAmount, backdated, gapInterestAmount? }
   */
  /** `reinvestType` is the staff's choice made at renewal time: 300 = Reinvest Principal + Interest,
   *  400 = Reinvest Principal Only (rest of the balance goes to the FD's linked Savings account). */
  renewFixedDepositAccount(accountId: string | number, reinvestType: 300 | 400): Observable<any> {
    return this.http.post(`/fixeddepositaccounts/${accountId}/renew`, { reinvestType });
  }

  /** Pre-step the Payment dialog calls, from the FD Dashboard, before submitting the generic `payment`
   *  command -- credits gap-period interest (at the linked account's rate) if the product's renewal
   *  grace window has passed; a no-op (`gapInterestAmount: 0`) if still within it. */
  creditGapInterestIfPastGrace(accountId: string | number): Observable<any> {
    return this.http.post(`/fixeddepositaccounts/${accountId}/credit-gap-interest`, {});
  }

  /** Read-only -- what a Renew is about to do (current balance, linked account's rate, gap days,
   *  gap-interest amount, projected new balance), shown in the Payment dialog before anything is
   *  confirmed. Posts nothing; safe to call as often as the dialog needs. */
  getFdRenewalPreview(accountId: string | number): Observable<any> {
    return this.http.get(`/fixeddepositaccounts/${accountId}/renewal-preview`);
  }

  /**
   * @param fixedDepositAccount Fixed Deposit Account
   * @returns {Observable<any>}
   */
  createFixedDepositAccount(fixedDepositAccount: any): Observable<any> {
    return this.http.post(`/fixeddepositaccounts`, fixedDepositAccount);
  }

  /**
   * @param {any} accountId Account Id
   * @param {any} fixedDepositAccount Fixed Deposit Account
   * @returns {Observable<any>}
   */
  updateFixedDepositAccount(accountId: any, fixedDepositAccount: any): Observable<any> {
    return this.http.put(`/fixeddepositaccounts/${accountId}`, fixedDepositAccount);
  }

  /**
   * @param clientId Client Id
   * @param clientName Client Name
   * @param fromAccountId Account Id
   * @param locale Locale
   * @param dateFormat Date Format
   * @returns {Observable<any>} Standing Instructions
   */
  getStandingInstructions(
    clientId: string,
    clientName: string,
    fromAccountId: string,
    locale: string,
    dateFormat: string
  ): Observable<any> {
    const httpParams = new HttpParams()
      .set('clientId', clientId)
      .set('clientName', clientName)
      .set('fromAccountId', fromAccountId)
      .set('fromAccountType', '2')
      .set('locale', locale)
      .set('dateFormat', dateFormat);
    return this.http.get(`/standinginstructions`, { params: httpParams });
  }
}