Initiate OTP

curl --request POST \
  "https://sms.lamah.com/api/otp/initiate" \
  --header "Authorization: Bearer YOUR_API_TOKEN" \
  --header "Content-Type: application/json" \
  --data '{
    "lang": "ar",
    "length": 6,
    "expiration": 5,
    "sender": "RealEstate",
    "payment_type": "wallet",
    "receiver": "00218912345678"
  }'

class OTPService {
  constructor(apiToken) {
    this.apiToken = apiToken;
    this.baseUrl = 'https://sms.lamah.com/api';
  }

  async initiateOTP(phoneNumber, options = {}) {
    const defaultOptions = {
      lang: 'en',
      length: 6,
      expiration: 5,
      sender: 'Lamah',
      payment_type: 'wallet'
    };

    const otpData = {
      ...defaultOptions,
      ...options,
      receiver: phoneNumber
    };

    try {
      const response = await fetch(`${this.baseUrl}/otp/initiate`, {
        method: 'POST',
        headers: {
          'Authorization': `Bearer ${this.apiToken}`,
          'Content-Type': 'application/json'
        },
        body: JSON.stringify(otpData)
      });

      if (!response.ok) {
        const error = await response.json();
        throw new Error(`OTP initiation failed: ${error.message}`);
      }

      const result = await response.json();
      
      // Store request_id for verification
      this.storeOTPRequest(phoneNumber, result.request_id);
      
      return result;
      
    } catch (error) {
      console.error('OTP initiation error:', error);
      throw error;
    }
  }

  storeOTPRequest(phoneNumber, requestId) {
    // Store in your database or cache
    // This is just an example using localStorage
    const otpData = {
      requestId,
      phoneNumber
    };
    localStorage.setItem(`otp_${phoneNumber}`, JSON.stringify(otpData));
  }

  getStoredOTPRequest(phoneNumber) {
    const stored = localStorage.getItem(`otp_${phoneNumber}`);
    return stored ? JSON.parse(stored) : null;
  }
}

// Usage
const otpService = new OTPService('YOUR_API_TOKEN');

const sendOTP = async (phoneNumber) => {
  try {
    const result = await otpService.initiateOTP(phoneNumber, {
      length: 6,
      expiration: 5,
      lang: 'en'
    });
    
    console.log('OTP sent successfully:', result.request_id);
    return result;
    
  } catch (error) {
    console.error('Failed to send OTP:', error.message);
    return null;
  }
};