/// <reference types="node" />
// Add at the top of your file to ignore dom types
import * as didJwt from 'did-jwt';
import { ethers } from 'ethers';
import fetch from 'node-fetch';

interface DIDCreationResult {
  did: string;
  privateKey: string;
  publicKey: string;
  isValid: boolean;
  jwt: string;
}

interface RegistrationResult {
  success: boolean;
  error?: string;
  response?: any;
}

async function createAndValidateDID(adminDid: string): Promise<DIDCreationResult> {
  if (!adminDid) {
    throw new Error('Admin DID is required for registration');
  }

  console.log('Using admin DID:', adminDid);
  
  // 1. Generate keypair
  console.log('Generating new keypair...');
  const wallet = ethers.Wallet.createRandom();
  const did = `did:ethr:${wallet.address}`;
  const privateKey = wallet.privateKey.slice(2);
  const publicKey = wallet.publicKey;

  // Create registration claim with admin as agent
  const registerClaim = {
    "@context": "https://schema.org",
    "@type": "RegisterAction",
    agent: { did: adminDid },
    participant: { did: did },
    object: "endorser.ch"
  };

  const vcPayload = {
    iat: Math.floor(Date.now() / 1000),
    exp: Math.floor(Date.now() / 1000) + 300,
    sub: "RegisterAction",
    vc: {
      "@context": ["https://www.w3.org/2018/credentials/v1"],
      type: ["VerifiableCredential"],
      credentialSubject: registerClaim
    }
  };

  console.log('\nGenerated DID Details:');
  console.log('----------------------');
  console.log('DID:', did);
  console.log('Admin DID:', adminDid);
  console.log('Address:', wallet.address);
  console.log('Private Key:', wallet.privateKey);
  console.log('Public Key:', wallet.publicKey);

  console.log('\nDebug Details:');
  console.log('-------------');
  console.log('Private Key (hex):', privateKey);  // Should be without 0x
  console.log('Public Key (hex):', publicKey);    // Should be with 0x
  console.log('Header:', {
    typ: "JWT",
    alg: "ES256K"
  });
  console.log('Payload:', vcPayload);

  // Create and sign JWT
  console.log('\nCreating JWT...');
  const signer = didJwt.SimpleSigner(privateKey);
  const jwt = await didJwt.createJWT(vcPayload, {
    issuer: did,
    signer: signer
  });
  
  console.log('\nJWT Parts:');
  const [header, payload, signature] = jwt.split('.');
  console.log('Header (base64):', header);
  console.log('Payload (base64):', payload);
  console.log('Signature (base64):', signature);

  return { did, privateKey, publicKey, isValid: true, jwt };
}

async function registerDID(jwt: string): Promise<RegistrationResult> {
  try {
    const response = await fetch('https://api.endorser.ch/api/v2/claim', {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json',
      },
      body: JSON.stringify({ jwtEncoded: jwt }),
    });

    console.log(`\nServer Response Status: ${response.status}`);
    const responseText = await response.text();
    console.log(`Server Response Body: ${responseText}`);

    if (response.ok) {
      return {
        success: true,
        response: JSON.parse(responseText)
      };
    } else {
      try {
        const errorJson = JSON.parse(responseText);
        const errorMsg = errorJson.error?.message || 'Unknown error';
        return {
          success: false,
          error: `Registration failed (${response.status}): ${errorMsg}`,
          response: errorJson
        };
      } catch {
        return {
          success: false,
          error: `Registration failed (${response.status}): ${responseText}`,
          response: responseText
        };
      }
    }
  } catch (e) {
    return {
      success: false,
      error: `Request failed: ${e}`
    };
  }
}

// Command line handling
const adminDid = 'did:ethr:0x0000694B58C2cC69658993A90D3840C560f2F51F';
if (!adminDid) {
  console.error('Usage: ts-node did_generator.ts <admin-did>');
  console.error('Example: ts-node did_generator.ts did:ethr:0x0000694B58C2cC69658993A90D3840C560f2F51F');
  process.exit(1);
}

console.log('Starting DID Generation...\n');
createAndValidateDID(adminDid)
  .then(async result => {
    console.log('\nSuccessfully generated DID with admin authorization!');
    console.log('Registration JWT:', result.jwt.substring(0, 50) + '...');

    console.log('\nAttempting registration...');
    const registrationResult = await registerDID(result.jwt);
    if (registrationResult.success) {
      console.log('Registration successful!');
      console.log('Response:', JSON.stringify(registrationResult.response, null, 2));
    } else {
      console.log('Registration failed!');
      console.log('Error:', registrationResult.error);
      if (registrationResult.response) {
        console.log('Full response:', JSON.stringify(registrationResult.response, null, 2));
      }
    }
  })
  .catch(error => {
    console.error('\nError:', error);
  });