import {describe, it} from 'node:test'
import assert from 'node:assert'
import {ethers} from 'ethers'

describe('Token Approval Functionality', () => {
  // Define a mock for the Privy client
  const mockPrivyClient = {
    walletApi: {
      ethereum: {
        sendTransaction: async (params: any) => {
          // Verify parameters
          assert.equal(params.address, 'test-address')
          assert.equal(params.chainType, 'ethereum')
          assert.equal(params.caip2, 'eip155:42161')
          assert.ok(params.transaction.data.startsWith('0x095ea7b3'), 'Data should be the approve function signature')
          
          // Return mock transaction hash
          return { hash: 'mock-tx-hash' }
        }
      }
    }
  }
  
  it('should encode approval data correctly', () => {
    // Create contract interface for ERC20 token
    const tokenABI = ["function approve(address spender, uint256 amount) public returns (bool)"]
    const contractInterface = new ethers.Interface(tokenABI)
    
    // Set up parameters
    const spenderAddress = '0xTestSpender'
    const amount = 100
    const decimals = 8
    
    // Encode with specific amount
    const approveAmount = ethers.parseUnits(amount.toString(), decimals)
    const data = contractInterface.encodeFunctionData("approve", [spenderAddress, approveAmount])
    
    // Verify the data starts with the approve function selector
    assert.ok(data.startsWith('0x095ea7b3'), 'Should start with the approve function selector')
    
    // Test with max amount
    const maxData = contractInterface.encodeFunctionData("approve", [spenderAddress, ethers.MaxUint256])
    assert.ok(maxData.startsWith('0x095ea7b3'), 'Should start with the approve function selector')
  })
  
  it('should format token data correctly for different tickers', () => {
    // Test a few mappings similar to getTokenDataFromTicker
    const testCases = [
      { 
        ticker: 'BTC', 
        expected: { 
          address: '0x2f2a2543B76A4166549F7aaB2e75Bef0aefC5B0f',
          decimals: 8 
        }
      },
      { 
        ticker: 'ETH', 
        expected: { 
          address: '0x82aF49447D8a07e3bd95BD0d56f35241523fBab1',
          decimals: 18 
        }
      }
    ]
    
    for (const testCase of testCases) {
      let result = { address: '', decimals: 0 }
      
      // Simple implementation of the ticker mapping logic
      if (testCase.ticker === 'BTC') {
        result = {
          address: '0x2f2a2543B76A4166549F7aaB2e75Bef0aefC5B0f',
          decimals: 8
        }
      } else if (testCase.ticker === 'ETH') {
        result = {
          address: '0x82aF49447D8a07e3bd95BD0d56f35241523fBab1',
          decimals: 18
        }
      }
      
      assert.deepEqual(result, testCase.expected, `Token data for ${testCase.ticker} should match expected values`)
    }
  })
  
  it('should generate chain name correctly', () => {
    // Test chain name generation
    const testCases = [
      { chainId: 1, expected: 'eip155:1' },
      { chainId: 42161, expected: 'eip155:42161' }
    ]
    
    for (const testCase of testCases) {
      const result = `eip155:${testCase.chainId}`
      assert.equal(result, testCase.expected, `Chain name for ${testCase.chainId} should match expected value`)
    }
  })
})