import { Injectable, HttpException, HttpStatus } from '@nestjs/common';
// import { HttpService } from '@nestjs/axios';
import { ConfigService } from '@nestjs/config';
// import { lastValueFrom } from 'rxjs';
import axios from 'axios';

export interface IParameterArray {
  name: 'otp';
  value: string;
}

export interface ISmsResponse {
  status: number;
  message: string;
}

export interface ISmsVerifyBody {
  Parameters: IParameterArray[];
  Mobile: string;
  TemplateId: string;
}

@Injectable()
export class SmsService {
  private readonly baseURL: string;
  private readonly OTP: string;
  private readonly apiKey: string;

  constructor(
    // private readonly httpService: HttpService,
    private readonly configService: ConfigService,
  ) {
    this.baseURL = this.configService.getOrThrow<string>('SMS_BASE_URL');
    this.OTP = this.configService.getOrThrow<string>('SMS_PATTERN_OTP');
    this.apiKey = this.configService.getOrThrow<string>('SMS_API_KEY');
  }

  async sendOtp(mobile: string, otp: string) {
    const smsData: ISmsVerifyBody = {
      Parameters: [{ name: 'otp', value: otp }],
      Mobile: mobile,
      TemplateId: this.OTP,
    };

    const url = `${this.baseURL}/send/verify`;

    try {
      const { data } = await axios.post<ISmsResponse>(url, smsData, {
        headers: {
          'Content-Type': 'application/json',
          'X-API-KEY': this.apiKey,
        },
      });
      if (data.status !== 1) {
        throw new HttpException('The SMS was not sent. Please try again later.', HttpStatus.BAD_GATEWAY);
      }
      return data;
    } catch (error) {
      console.error('SMS sending failed:', JSON.stringify(error));
      throw new HttpException('The SMS was not sent. Please try again later.', HttpStatus.BAD_GATEWAY);
    }
  }
}