/**
 * 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/.
 */

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

/** One row of a voucher correction, as the server keeps it (snake_case columns). */
export interface VoucherCorrection {
  id: number;
  original_voucher_no: string;
  original_txn_id: number;
  wrong_savings_account_id: number;
  wrong_account_no: string;
  wrong_client_name: string | null;
  amount: number;
  txn_date: string | null;
  status: 'UNPASS_PENDING' | 'UNPASSED' | 'UNPASS_REJECTED' | 'CORRECTION_PENDING' | 'COMPLETED' | 'CLOSED';
  reason: string | null;
  rejection_reason: string | null;
  unpass_by_name: string | null;
  unpass_at: string | null;
  unpass_approved_by_name: string | null;
  correct_account_no: string | null;
  correct_client_name: string | null;
  correction_by_name: string | null;
  correction_at: string | null;
  correction_approved_by_name: string | null;
  new_voucher_no: string | null;
}

/** A cash deposit voucher of today that can still be unpassed. */
export interface EligibleVoucher {
  voucherNo: string;
  amount: number;
  createdAt: string;
  cashier: string;
  txnId: number;
  savingsAccountId: number;
  accountNo: string;
  clientName: string | null;
  paymentType: string;
}

/** What the server knows about a savings account typed in as the correct one. */
export interface AccountLookup {
  id: number;
  accountNo: string;
  clientId: number | null;
  clientName: string | null;
  balance: number;
  currencyCode: string;
  canReceive: boolean;
}

/** HTTP service for the voucher correction workflow: unpass, approve, re-enter, approve. */
@Injectable({ providedIn: 'root' })
export class VoucherCorrectionService {
  private http = inject(HttpClient);
  private readonly base = '/vouchers/corrections';

  eligible(search?: string): Observable<EligibleVoucher[]> {
    let params = new HttpParams();
    if (search) params = params.set('search', search);
    return this.http.get<EligibleVoucher[]>(`${this.base}/eligible`, { params });
  }

  unpass(voucherNo: string, reason: string): Observable<any> {
    return this.http.post(`${this.base}/unpass`, { voucherNo, reason });
  }

  list(status?: string, mine = false): Observable<VoucherCorrection[]> {
    let params = new HttpParams().set('mine', String(mine));
    if (status) params = params.set('status', status);
    return this.http.get<VoucherCorrection[]>(this.base, { params });
  }

  get(id: number): Observable<VoucherCorrection> {
    return this.http.get<VoucherCorrection>(`${this.base}/${id}`);
  }

  accountLookup(accountNo: string): Observable<AccountLookup> {
    return this.http.get<AccountLookup>(`${this.base}/account-lookup`, { params: { accountNo } });
  }

  submitCorrection(id: number, correctAccountNo: string): Observable<any> {
    return this.http.post(`${this.base}/${id}/correction`, { correctAccountNo });
  }

  /** The cashier gives up the correction, e.g. when the wrong account no longer holds the money. */
  close(id: number, reason: string): Observable<any> {
    return this.http.post(`${this.base}/${id}/close`, { reason });
  }

  approveUnpass(id: number): Observable<any> {
    return this.http.post(`${this.base}/${id}/unpass/approve`, {});
  }

  rejectUnpass(id: number, reason: string): Observable<any> {
    return this.http.post(`${this.base}/${id}/unpass/reject`, { reason });
  }

  approveCorrection(id: number): Observable<any> {
    return this.http.post(`${this.base}/${id}/correction/approve`, {});
  }

  rejectCorrection(id: number, reason: string): Observable<any> {
    return this.http.post(`${this.base}/${id}/correction/reject`, { reason });
  }

  /** Ids of the transactions of this account that a completed correction removed. */
  voidedTransactions(savingsAccountId: number): Observable<number[]> {
    return this.http.get<number[]>(`${this.base}/voided-transactions`, { params: { savingsAccountId } });
  }
}