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 USER = getAddress('0xa013422A5918CD099C63c8CC35283EACa99a705d')

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'
  },
  {
    inputs: [],
    name: 'getBorrowRate',
    outputs: [{ name: '', type: 'uint64' }],
    stateMutability: 'view',
    type: 'function'
  }
]

async function main() {
  console.log('\n=== 验证当前借款状态 ===\n')
  console.log('用户:', USER)
  console.log('Lending 合约:', LENDING_PROXY)
  console.log()

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

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

  // 获取借款利率
  const borrowRate = await client.readContract({
    address: LENDING_PROXY,
    abi: LENDING_ABI,
    functionName: 'getBorrowRate'
  })

  console.log('=== 账户状态 ===')
  console.log()
  console.log('getBalance() 返回值:', balance.toString())
  if (balance > 0) {
    console.log('  → 用户有存款:', Number(balance) / 1e6, 'USDC')
  } else if (balance < 0) {
    console.log('  → 用户有负余额（债务）:', Number(-balance) / 1e6, 'USDC')
  } else {
    console.log('  → 用户余额为 0')
  }
  console.log()

  console.log('borrowBalanceOf() 返回值:', borrowBalance.toString())
  console.log('  → 借款金额:', Number(borrowBalance) / 1e6, 'USDC')
  console.log()

  console.log('=== 利息信息 ===')
  console.log()
  console.log('借款年化利率 (APY):', (Number(borrowRate) / 1e18 * 100).toFixed(2), '%')
  console.log()

  // 分析结果
  console.log('=== 分析 ===')
  console.log()

  if (borrowBalance > 0n) {
    console.log('✓ 用户确实有借款！')
    console.log()
    console.log('借款金额:', Number(borrowBalance) / 1e6, 'USDC')
    console.log()

    if (balance === 0n) {
      console.log('余额状态: balance = 0，这意味着：')
      console.log('  - 用户之前可能有存款')
      console.log('  - withdraw 金额超过了存款')
      console.log('  - 超出部分形成了债务')
      console.log()
      console.log('这正是 Compound V3 的设计：')
      console.log('  withdraw(amount) 会：')
      console.log('    1. 优先从存款中扣除')
      console.log('    2. 存款不足时，自动创建债务')
    }

    console.log()
    console.log('用户需要归还的总额:', Number(borrowBalance) / 1e6, 'USDC')
    console.log('(注意：每秒都在计息，实际金额会略高)')
  } else {
    console.log('✗ 用户当前没有借款')
  }
}

main()