import { ethers } from 'ethers';

// 1. Query positions (FREE - no auth needed)
async function getPositions(wallet: string) {
  const response = await fetch('https://degenai.dev/x402/get_positions', {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ wallet })
  });
  return response.json();
}

// 2. Authorize trading (one-time setup)
async function authorizeTrading(signer: ethers.Signer, payerAddress: string) {
  // Step 1: Prepare
  const prepareRes = await fetch('https://degenai.dev/x402/authorize/prepare', {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({
      payerAddress,
      hyperLiquidWallet: await signer.getAddress()
    })
  });
  const prepareData = await prepareRes.json();
  const { agentApprovalTypedData, builderFeeTypedData, nonce, builderNonce } = prepareData;

  // Step 2: Sign both typed data objects with trading wallet
  const agentApprovalSignature = await signer.signTypedData(
    agentApprovalTypedData.domain,
    agentApprovalTypedData.types,
    agentApprovalTypedData.message
  );
  const builderFeeSignature = builderFeeTypedData
    ? await signer.signTypedData(
        builderFeeTypedData.domain,
        builderFeeTypedData.types,
        builderFeeTypedData.message
      )
    : '';

  // Step 3: Approve
  const approveRes = await fetch('https://degenai.dev/x402/authorize/approve', {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({
      payerAddress,
      hyperLiquidWallet: await signer.getAddress(),
      agentApprovalSignature,
      builderFeeSignature,
      nonce,
      builderNonce
    })
  });
  return approveRes.json();
}

// 3. Execute trade (requires payment signature)
async function executeTrade(paymentSignature: string) {
  const response = await fetch('https://degenai.dev/x402/hyperliquid_order', {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      'PAYMENT-SIGNATURE': paymentSignature
    },
    body: JSON.stringify({
      action: 'create_market',
      coin: 'ETH',
      isBuy: true,
      dollarSize: 100
    })
  });

  // Handle rate limiting
  if (response.status === 429) {
    const resetTime = response.headers.get('X-RateLimit-Reset');
    console.log(`Rate limited. Retry after: ${resetTime}`);
    throw new Error('Rate limited');
  }

  return response.json();
}