import { createPublicClient, http, getAddress } from 'viem'
import { arbitrumSepolia } from 'viem/chains'

const client = createPublicClient({
  chain: arbitrumSepolia,
  transport: http('https://api.zan.top/node/v1/arb/sepolia/baf84c429d284bb5b676cb8c9ca21c07')
})

const LENDING_PROXY = getAddress('0xCb4E7B1069F6C26A1c27523ce4c8dfD884552d1D')
const USDC = getAddress('0x75faf114eafb1BDbe2F0316DF893fd58CE46AA4d')
const USER = getAddress('0xa013422A5918CD099C63c8CC35283EACa99a705d')

const TRANSFER_EVENT = {
  type: 'event',
  name: 'Transfer',
  inputs: [
    { indexed: true, name: 'from', type: 'address' },
    { indexed: true, name: 'to', type: 'address' },
    { indexed: false, name: 'value', type: 'uint256' }
  ]
}

async function main() {
  console.log('\n=== 检查借款历史（USDC 从 Lending 转出给用户）===\n')
  console.log('用户:', USER)
  console.log('Lending 合约:', LENDING_PROXY)
  console.log('USDC:', USDC)
  console.log()

  const latestBlock = await client.getBlockNumber()
  console.log('最新区块:', latestBlock)
  console.log('查询范围: 最近 10000 个区块\n')

  try {
    // 查找 USDC 从 Lending 转给用户的记录（这才是真正的借款/提取）
    const logs = await client.getLogs({
      address: USDC,
      event: TRANSFER_EVENT,
      args: {
        from: LENDING_PROXY,
        to: USER
      },
      fromBlock: latestBlock - 10000n,
      toBlock: latestBlock
    })

    if (logs.length > 0) {
      console.log(`✓ 找到 ${logs.length} 笔 USDC 转出记录:\n`)
      let totalWithdrawn = 0n

      for (let i = 0; i < logs.length; i++) {
        const log = logs[i]
        const { value } = log.args
        totalWithdrawn += value

        console.log(`${i + 1}. 区块 ${log.blockNumber}`)
        console.log(`   交易: ${log.transactionHash}`)
        console.log(`   数量: ${Number(value) / 1e6} USDC`)

        // 获取交易详情以确认是 withdraw 还是其他操作
        try {
          const tx = await client.getTransaction({ hash: log.transactionHash })
          const selector = tx.input.slice(0, 10)

          // withdraw(uint256) = 0x2e1a7d4d
          // withdrawFrom(...) = ...
          if (selector === '0x2e1a7d4d') {
            console.log(`   函数: withdraw (借款/提取)`)
          } else {
            console.log(`   函数选择器: ${selector}`)
          }
        } catch (error) {
          console.log(`   (无法获取交易详情)`)
        }

        console.log()
      }

      console.log(`总计: ${Number(totalWithdrawn) / 1e6} USDC`)
    } else {
      console.log('✗ 未找到任何 USDC 转出记录')
      console.log()
      console.log('这意味着：')
      console.log('  - 用户从未真正从 Lending 提取或借款 USDC')
      console.log('  - 如果用户看到"借款成功"的消息，那些都是前端误报')
    }

    console.log('\n=== 对比：USDC 转入 Lending（存款）===\n')

    const supplyLogs = await client.getLogs({
      address: USDC,
      event: TRANSFER_EVENT,
      args: {
        from: USER,
        to: LENDING_PROXY
      },
      fromBlock: latestBlock - 10000n,
      toBlock: latestBlock
    })

    if (supplyLogs.length > 0) {
      console.log(`找到 ${supplyLogs.length} 笔 USDC 存入记录:\n`)
      let totalSupplied = 0n

      supplyLogs.forEach((log, i) => {
        const { value } = log.args
        totalSupplied += value
        console.log(`${i + 1}. 区块 ${log.blockNumber}`)
        console.log(`   交易: ${log.transactionHash}`)
        console.log(`   数量: ${Number(value) / 1e6} USDC`)
        console.log()
      })

      console.log(`总计存入: ${Number(totalSupplied) / 1e6} USDC`)
    } else {
      console.log('未找到 USDC 存入记录')
    }

    // 检查当前余额
    console.log('\n=== 当前账户状态 ===\n')

    const LENDING_ABI = [
      {
        inputs: [{ name: 'account', type: 'address' }],
        name: 'getBalance',
        outputs: [{ name: '', type: 'int256' }],
        stateMutability: 'view',
        type: 'function'
      },
      {
        inputs: [{ name: 'account', type: 'address' }],
        name: 'borrowBalanceOf',
        outputs: [{ name: '', type: 'uint256' }],
        stateMutability: 'view',
        type: 'function'
      }
    ]

    const balance = await client.readContract({
      address: LENDING_PROXY,
      abi: LENDING_ABI,
      functionName: 'getBalance',
      args: [USER]
    })

    const borrowBalance = await client.readContract({
      address: LENDING_PROXY,
      abi: LENDING_ABI,
      functionName: 'borrowBalanceOf',
      args: [USER]
    })

    console.log('USDC 余额（存款）:', balance > 0 ? `${Number(balance) / 1e6} USDC` : '0 USDC')
    console.log('借款余额:', Number(borrowBalance) / 1e6, 'USDC')
    console.log()

    if (balance > 0) {
      console.log('⚠️  用户当前有 USDC 存款在 Lending 中')
      console.log(`   存款金额: ${Number(balance) / 1e6} USDC`)
      console.log()
      console.log('根据 Compound V3 设计：')
      console.log('  - withdraw() 会先从存款中扣除')
      console.log(`  - 只有 withdraw 金额 > ${Number(balance) / 1e6} USDC 时，才会产生真正的借款`)
    }

  } catch (error) {
    console.error('查询失败:', error.message)
  }
}

main()