/**
 * Cross-Protocol: Flash loan arbitrage pattern
 * 
 * This example demonstrates a flash loan arbitrage strategy:
 * 1. Flash loan USDC from Aave
 * 2. Swap USDC → DAI on Uniswap v3
 * 3. Swap DAI → USDC on another DEX (or different pool)
 * 4. Repay flash loan with premium
 * 5. Keep profit
 * 
 * Note: This is a conceptual example. Real arbitrage requires:
 * - Price difference detection
 * - Gas cost calculation
 * - Slippage protection
 * - MEV protection
 */

import { createWalletRpcClient } from '../../src/utils/chain-config.js';
import { getAavePoolAddress, getUniswapSwapRouter02 } from '../../src/utils/addresses.js';
import { getTokenMetadata, parseTokenAmount } from '../../src/utils/tokens.js';
import { waitForTransaction } from '../../src/utils/rpc.js';
import type { Address } from 'viem';

const CHAIN_ID = 1; // Mainnet
const PRIVATE_KEY = process.env.PRIVATE_KEY as `0x${string}`;

/**
 * Flash loan receiver contract for arbitrage
 * 
 * In production, you would deploy a contract that:
 * 1. Receives flash loan from Aave
 * 2. Executes arbitrage swaps
 * 3. Repays flash loan
 * 4. Sends profit to owner
 * 
 * See contracts/examples/AaveFlashLoanReceiver.sol for Solidity implementation
 */
const ARBITRAGE_CONTRACT = process.env.ARBITRAGE_CONTRACT as `0x${string}`;

async function flashLoanArbitrage() {
  const walletClient = createWalletRpcClient(CHAIN_ID, PRIVATE_KEY);
  const publicClient = walletClient as any;
  const account = walletClient.account?.address;
  
  if (!account) {
    throw new Error('No account available');
  }

  const poolAddress = getAavePoolAddress(CHAIN_ID);
  const token = getTokenMetadata(CHAIN_ID, 'USDC');
  const amount = parseTokenAmount('100000', token.decimals); // 100,000 USDC

  console.log('Flash loan arbitrage strategy:');
  console.log(`  1. Flash loan ${amount} ${token.symbol} from Aave`);
  console.log(`  2. Execute arbitrage swaps`);
  console.log(`  3. Repay flash loan`);
  console.log(`  4. Keep profit`);
  console.log(`\nArbitrage contract: ${ARBITRAGE_CONTRACT}`);

  if (!ARBITRAGE_CONTRACT) {
    throw new Error('ARBITRAGE_CONTRACT environment variable not set');
  }

  // Note: In production, this would be done through a smart contract
  // that implements IFlashLoanReceiver and executes the arbitrage logic
  console.log('\n⚠️  This is a conceptual example.');
  console.log('In production:');
  console.log('  1. Deploy a flash loan receiver contract');
  console.log('  2. Contract receives flash loan');
  console.log('  3. Contract executes arbitrage (swaps)');
  console.log('  4. Contract repays flash loan + premium');
  console.log('  5. Contract sends profit to owner');
  console.log('\nSee contracts/examples/AaveFlashLoanReceiver.sol for implementation');
}

// Run if executed directly
if (import.meta.url === `file://${process.argv[1]}`) {
  flashLoanArbitrage().catch(console.error);
}

export { flashLoanArbitrage };