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

import { ErrorLoggerService } from '../../core/error-logger.service';
import { Table } from '../../core/table';

import { Bill } from './bill';
import { VoucherType } from './voucher-type';

const url = '/api/voucher';
const urlMoveTable = '/api/move-table';
const urlMoveKot = '/api/move-kot';
const urlSplitBill = '/api/split-bill';
const serviceName = 'VoucherService';

@Injectable({ providedIn: 'root' })
export class VoucherService {
  constructor(private http: HttpClient, private log: ErrorLoggerService) {}

  get(id: string): Observable<Bill> {
    return this.http
      .get<Bill>(`${url}/from-id/${id}`)
      .pipe(catchError(this.log.handleError(serviceName, `get id=${id}`))) as Observable<Bill>;
  }

  getFromTable(tableId: string, voucherId: string | null, guestId: string | null): Observable<Bill> {
    let params = new HttpParams();
    if (voucherId !== null) {
      params = params.set('v', voucherId);
    }
    if (guestId !== null) {
      params = params.set('g', guestId);
    }

    return this.http
      .get<Bill>(`${url}/from-table/${tableId}`, { params })
      .pipe(
        catchError(
          this.log.handleError(
            serviceName,
            `getFromTable tableId=${tableId} voucherId=${voucherId} guestId=${guestId}`,
          ),
        ),
      ) as Observable<Bill>;
  }

  getFromBill(billId: string): Observable<Bill> {
    return this.http
      .get<Bill>(`${url}/from-bill/${billId}`)
      .pipe(catchError(this.log.handleError(serviceName, `getFromBill billId=${billId}`))) as Observable<Bill>;
  }

  save(voucher: Bill, voucherType: VoucherType, guestBookId: string | null, updateTable: boolean): Observable<boolean> {
    const options = {
      params: new HttpParams().set('p', voucherType.toString()).set('u', updateTable.toString()),
    };
    if (guestBookId !== null) {
      options.params = options.params.set('g', guestBookId);
    }
    return this.http
      .post<boolean>(`${url}/save`, voucher, options)
      .pipe(catchError(this.log.handleError(serviceName, 'save'))) as Observable<boolean>;
  }

  update(
    voucher: Bill,
    voucherType: VoucherType,
    guestBookId: string | null,
    updateTable: boolean,
  ): Observable<boolean> {
    const options = {
      params: new HttpParams().set('p', voucherType.toString()).set('u', updateTable.toString()),
    };
    if (guestBookId !== null) {
      options.params = options.params.set('g', guestBookId);
    }
    return this.http
      .put<boolean>(`${url}/update/${voucher.id}`, voucher, options)
      .pipe(catchError(this.log.handleError(serviceName, 'update'))) as Observable<boolean>;
  }

  change(
    voucher: Bill,
    voucherType: VoucherType,
    guestBookId: string | null,
    updateTable: boolean,
  ): Observable<boolean> {
    const options = { params: new HttpParams().set('u', updateTable.toString()) };
    if (guestBookId !== null) {
      options.params = options.params.set('g', guestBookId);
    }
    return this.http
      .put<boolean>(`${url}/change/${voucher.id}`, voucher, options)
      .pipe(catchError(this.log.handleError(serviceName, 'change'))) as Observable<boolean>;
  }

  saveOrUpdate(
    voucher: Bill,
    voucherType: VoucherType,
    guestBookId: string | null,
    updateTable: boolean,
  ): Observable<boolean> {
    if (!voucher.id) {
      return this.save(voucher, voucherType, guestBookId, updateTable);
    }
    if (voucher.voucherType === VoucherType.Kot) {
      return this.update(voucher, voucherType, guestBookId, updateTable);
    }
    return this.change(voucher, voucherType, guestBookId, updateTable);
  }

  receivePayment(
    id: string,
    amounts: { id: number; name: string; amount: number }[],
    reason: string,
    updateTable: boolean,
  ): Observable<boolean> {
    const options = { params: new HttpParams().set('u', updateTable.toString()) };
    return this.http
      .post<boolean>(`${url}/receive-payment/${id}`, { reason, amounts }, options)
      .pipe(catchError(this.log.handleError(serviceName, 'receivePayment'))) as Observable<boolean>;
  }

  cancelBill(id: string, reason: string, updateTable: boolean): Observable<boolean> {
    const options = {
      params: new HttpParams().set('reason', reason).set('u', updateTable.toString()),
    };
    return this.http
      .post<boolean>(`${url}/cancel-bill/${id}`, {}, options)
      .pipe(catchError(this.log.handleError(serviceName, 'cancelBill'))) as Observable<boolean>;
  }

  moveTable(id: string, table: Table): Observable<boolean> {
    return this.http
      .post<boolean>(`${urlMoveTable}/move`, {
        voucherId: id,
        tableId: table.id,
      })
      .pipe(catchError(this.log.handleError(serviceName, 'moveTable'))) as Observable<boolean>;
  }

  mergeTable(id: string, table: Table): Observable<boolean> {
    return this.http
      .post<boolean>(`${urlMoveTable}/merge`, {
        voucherId: id,
        tableId: table.id,
        newVoucherId: table.voucherId,
      })
      .pipe(catchError(this.log.handleError(serviceName, 'mergeTable'))) as Observable<boolean>;
  }

  moveKotToNewTable(id: string, kotId: string, table: Table): Observable<boolean> {
    return this.http
      .post<boolean>(`${urlMoveKot}/move`, {
        voucherId: id,
        kotId,
        tableId: table.id,
      })
      .pipe(catchError(this.log.handleError(serviceName, 'moveKotToNewTable'))) as Observable<boolean>;
  }

  mergeKotWithOldBill(id: string, kotId: string, table: Table): Observable<boolean> {
    return this.http
      .post<boolean>(`${urlMoveKot}/merge`, {
        voucherId: id,
        kotId,
        tableId: table.id,
        newVoucherId: table.voucherId,
      })
      .pipe(catchError(this.log.handleError(serviceName, 'mergeKotWithOldBill'))) as Observable<boolean>;
  }

  splitBill(id: string, inventoriesToMove: string[], table: Table, updateTable: boolean) {
    const options = { params: new HttpParams().set('u', updateTable.toString()) };
    return this.http
      .post<boolean>(
        `${urlSplitBill}/${id}`,
        {
          inventories: inventoriesToMove,
          tableId: table.id,
        },
        options,
      )
      .pipe(catchError(this.log.handleError(serviceName, 'splitBill'))) as Observable<boolean>;
  }
}