const axios = require("axios");

const SMS_API_KEY = "QkkNxhyXZ6GtEf1soOTtikomO3mA4LaNQDH8mol8huDIwh00";

module.exports.sms = async (phoneNumber, message) => {
  const smsService = new SmsService(SMS_API_KEY);
  return smsService.sendMessage(phoneNumber, message);
};

/** Sends login/verification OTP via sms.ir template (verify endpoint). */
module.exports.sendOtpSms = async (phoneNumber, otp) => {
  const smsService = new SmsService(SMS_API_KEY);
  return smsService.sendOTPSms(otp, phoneNumber);
};

class SmsService {
  constructor(apiKey) {
    this.API_URL = "https://api.sms.ir/v1";
    this.OTP_PATTERN = "628767";
    this.SMS_API_KEY = apiKey;
  }

  async sendMessage(phone, message) {
    try {
      const lineNumber = await this.getLineNumber();
      const smsData = {
        MessageTexts: [message],
        LineNumber: `${lineNumber}`,
        Mobiles: [phone],
      };
      const { data } = await axios.post(`${this.API_URL}/send/likeToLike`, smsData, {
        headers: {
          "X-API-KEY": this.SMS_API_KEY,
        },
      });
      return data;
    } catch (error) {
      console.error("Error in sending SMS", error);
    }
  }

  async getLineNumber() {
    try {
      const { data } = await axios.get(`${this.API_URL}/line`, {
        headers: {
          "X-API-KEY": this.SMS_API_KEY,
        },
      });
      return data.data[1] ?? data.data[0];
    } catch (error) {
      console.error("Error in getting line number", error);
    }
  }

  async sendOTPSms(otp, phone) {
    const smsData = {
      Parameters: [{ name: "code", value: `${otp}` }],
      Mobile: phone,
      TemplateId: this.OTP_PATTERN,
    };
    try {
      const { data } = await axios.post(`${this.API_URL}/send/verify`, smsData, {
        headers: {
          "X-API-KEY": this.SMS_API_KEY,
          "Content-Type": "application/json",
        },
      });
      return data;
    } catch (error) {
      console.error("Error in sending OTP SMS", error);
    }
  }
}