package com.xcong.excoin.modules.blackchain.service;

import java.io.File;
import java.io.IOException;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.math.RoundingMode;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ExecutionException;

import org.web3j.abi.FunctionEncoder;
import org.web3j.abi.FunctionReturnDecoder;
import org.web3j.abi.TypeReference;
import org.web3j.abi.datatypes.Address;
import org.web3j.abi.datatypes.Function;
import org.web3j.abi.datatypes.Type;
import org.web3j.abi.datatypes.generated.Uint256;
import org.web3j.crypto.Credentials;
import org.web3j.crypto.RawTransaction;
import org.web3j.crypto.TransactionEncoder;
import org.web3j.crypto.WalletUtils;
import org.web3j.protocol.Web3j;
import org.web3j.protocol.admin.Admin;
import org.web3j.protocol.core.DefaultBlockParameterName;
import org.web3j.protocol.core.Request;
import org.web3j.protocol.core.methods.request.Transaction;
import org.web3j.protocol.core.methods.response.*;
import org.web3j.protocol.http.HttpService;
import org.web3j.utils.Convert;
import org.web3j.utils.Numeric;
import org.web3j.utils.Convert.Unit;

/**
 * ETH类，使用Web3j 下面为使用教程
 * https://kauri.io/article/925d923e12c543da9a0a3e617be963b4/manage-an-ethereum-account-with-java-and-web3js
 * 
 * @author Administrator
 *
 */

public class EthService {

	private static String ethWalletPath = "/home/javaweb/webresource/eth";
	// private static String ethWalletPath="E://";
	private Web3j web3j;
	// private Admin admin;
	// private Parity parity;
	/**
	 * 服务器地址
	 */
	//private static final String ETH_UTL = "https://mainnet.infura.io/v3/882c66ebcfc141abbea22b948fa44321";
	private static final String ETH_UTL = "http://120.55.86.146:8545";

	public EthService() {
		try {
			HttpService service = new HttpService(ETH_UTL);
			web3j = Web3j.build(service);
			// parity = Parity.build(service);
			// admin = Admin.build(service);
		} catch (Exception e) {
			System.out.println("liangjieshibao");
			// logger.error("==============虚拟币-以太坊链接获取失败！");
			e.printStackTrace();
		}
	}

	/**
	 * 查询ETH余额
	 * 
	 * @param address
	 * @return
	 */
	public static BigDecimal getEthBlance(String address) {
		Web3j web3 = Web3j.build(new HttpService(ETH_UTL));
		EthGetBalance balanceWei;
		try {
			balanceWei = web3.ethGetBalance(address, DefaultBlockParameterName.LATEST).send();
			if (balanceWei.getResult() == null) {
				return null;
			}
			BigDecimal balanceInEther = Convert.fromWei(balanceWei.getBalance().toString(), Unit.ETHER);
			return balanceInEther;
		} catch (Exception e) {
			System.out.println("ETH查询失败：" + address);
			e.printStackTrace();
		}
		return null;

	}

	/**
	 * 创建ETH钱包
	 * 
	 * @return
	 */
	public static Map<String, String> createEth() {
		Map<String, String> wallet = new HashMap<String, String>();
		try {
			String walletPassword = "secr3t";
			// 文件路径
			String walletDirectory = ethWalletPath;

			String walletName = WalletUtils.generateNewWalletFile(walletPassword, new File(walletDirectory));
			System.out.println("wallet location: " + walletDirectory + "/" + walletName);
			Credentials credentials = WalletUtils.loadCredentials(walletPassword, walletDirectory + "/" + walletName);
			String accountAddress = credentials.getAddress();
			String privateKey = credentials.getEcKeyPair().getPrivateKey().toString(16);
			// 钱包地址
			wallet.put("address", accountAddress);
			// 钱包私钥
			wallet.put("privateKey", privateKey);
			// 产生的钱包文件地址
			wallet.put("walletLocation", walletDirectory + "/" + walletName);
		} catch (Exception e) {
			e.printStackTrace();
		}
		return wallet;
	}

	public boolean checkTransferResult(String hash) {
		// 0xa3e6a0ccc3aac30d866a86ca9c0477dd58b7b061787ba40b16c3844803273816 交易hash
		Request<?, EthGetTransactionReceipt> ethGetTransactionReceiptRequest = web3j.ethGetTransactionReceipt(hash);
		EthGetTransactionReceipt send = null;
		try {
			send = ethGetTransactionReceiptRequest.send();
			if(send!=null){
				TransactionReceipt result = send.getResult();
				if(result!=null){
					String status = result.getStatus();
					System.out.println(status);//0x1
					if("0x1".equals(status)){
						return true;
					}else{
						return false;
					}
				}

			}

		} catch (IOException e) {
			e.printStackTrace();
			return false;
		}
        return false;
	}

	public static void main(String[] args) throws IOException {
		HttpService service = new HttpService(ETH_UTL);
		Web3j build = Web3j.build(service);
		//Request<?, EthTransaction> ethTransactionRequest = build.ethGetTransactionByHash("0xa3e6a0ccc3aac30d866a86ca9c0477dd58b7b061787ba40b16c3844803273816");
		Request<?, EthGetTransactionReceipt> ethGetTransactionReceiptRequest = build.ethGetTransactionReceipt("0xa3e6a0ccc3aac30d866a86ca9c0477dd58b7b061787ba40b16c3844803273816");
		EthGetTransactionReceipt send = ethGetTransactionReceiptRequest.send();
		String status = send.getResult().getStatus();
		System.out.println(status);//0x1
//		EthTransaction send = ethTransactionRequest.send();
//		String input = send.getResult().getInput();
//		System.out.println(input);
	}

	/**
	 * 
	 * 方法描述：获取代币余额
	 * 
	 * @param fromAddress
	 * @param
	 * @param
	 * @return long
	 */
	public BigDecimal tokenGetBalance(String fromAddress) {
		try {
			// 合约地址
			String contractAddress = "0xdac17f958d2ee523a2206206994597c13d831ec7";
			int decimal = 6;
			String methodName = "balanceOf";
			List<Type> inputParameters = new ArrayList<>();
			List<TypeReference<?>> outputParameters = new ArrayList<>();
			Address address = new Address(fromAddress);
			inputParameters.add(address);
			TypeReference<Uint256> typeReference = new TypeReference<Uint256>() {
			};
			outputParameters.add(typeReference);
			Function function = new Function(methodName, inputParameters, outputParameters);
			String data = FunctionEncoder.encode(function);
			Transaction transaction = Transaction.createEthCallTransaction(fromAddress, contractAddress, data);

			EthCall ethCall;
			BigInteger balanceValue = BigInteger.ZERO;
			try {
				ethCall = web3j.ethCall(transaction, DefaultBlockParameterName.LATEST).send();
				List<Type> results = FunctionReturnDecoder.decode(ethCall.getValue(), function.getOutputParameters());
				balanceValue = (BigInteger) results.get(0).getValue();
			} catch (IOException e) {
				e.printStackTrace();
			}
			double res = BigDecimalUtil.div(new BigDecimal(balanceValue).doubleValue(), Math.pow(10, decimal), 8);
			if (res > 0) {
				return new BigDecimal(res);
			}
		} catch (Exception e) {
			// logger.error("==============以太坊代币链接获取失败！");
			e.printStackTrace();
		}
		return BigDecimal.ZERO;
	}

	// USDT
	public String tokenSend(String privateKey, String fromAddress, String toAddress, String amount)
			throws InterruptedException, ExecutionException {
		// Web3j web3j = Web3j.build(new
		// HttpService("https://mainnet.infura.io/v3/882c66ebcfc141abbea22b948fa44321"));
		String contractAddress = "0xdac17f958d2ee523a2206206994597c13d831ec7";
		Credentials credentials = Credentials.create(privateKey);

		EthGetTransactionCount ethGetTransactionCount = web3j
				.ethGetTransactionCount(fromAddress, DefaultBlockParameterName.LATEST).sendAsync().get();

		BigInteger nonce = ethGetTransactionCount.getTransactionCount();

		Function function = new Function("transfer",
				Arrays.asList(new Address(toAddress), new Uint256(new BigInteger(amount))),
				Arrays.asList(new TypeReference<Type>() {
				}));

		String encodedFunction = FunctionEncoder.encode(function);

		RawTransaction rawTransaction = RawTransaction.createTransaction(nonce,
				Convert.toWei("40", Convert.Unit.GWEI).toBigInteger(),// 给矿工开的转账单价 单价越高越快
				Convert.toWei("80000", Convert.Unit.WEI).toBigInteger(), contractAddress, encodedFunction);//里程上限
		        // 10*80000/1000000000=0.0008 手续费

		byte[] signedMessage = TransactionEncoder.signMessage(rawTransaction, credentials);
		String hexValue = Numeric.toHexString(signedMessage);

		// log.debug("transfer hexValue:" + hexValue);

		EthSendTransaction ethSendTransaction = web3j.ethSendRawTransaction(hexValue).sendAsync().get();


		if (ethSendTransaction.hasError()) {
			// log.info("transfer error:", ethSendTransaction.getError().getMessage());
			return "";
		} else {
			String transactionHash = ethSendTransaction.getTransactionHash();
			// log.info("Transfer transactionHash:" + transactionHash);
			return transactionHash;
		}
	}

	public String ethSend(String privateKey, String fromAddress, String toAddress, String amount)
			throws InterruptedException, ExecutionException {
		// Web3j web3j = Web3j.build(new
		// HttpService("https://mainnet.infura.io/v3/882c66ebcfc141abbea22b948fa44321"));

		Credentials credentials = Credentials.create(privateKey);

		EthGetTransactionCount ethGetTransactionCount = web3j
				.ethGetTransactionCount(fromAddress, DefaultBlockParameterName.LATEST).sendAsync().get();

		BigInteger nonce = ethGetTransactionCount.getTransactionCount();
		BigInteger value = Convert.toWei(amount, Convert.Unit.ETHER).toBigInteger();
		RawTransaction rawTransaction = RawTransaction.createEtherTransaction(nonce,
				Convert.toWei("40", Convert.Unit.GWEI).toBigInteger(),
				Convert.toWei("60000", Convert.Unit.WEI).toBigInteger(), toAddress, value);
		byte[] signedMessage = TransactionEncoder.signMessage(rawTransaction, credentials);
		String hexValue = Numeric.toHexString(signedMessage);

		EthSendTransaction ethSendTransaction = web3j.ethSendRawTransaction(hexValue).sendAsync().get();
		if (ethSendTransaction.hasError()) {
			// log.info("transfer error:", ethSendTransaction.getError().getMessage());
			return "";
		} else {
			String transactionHash = ethSendTransaction.getTransactionHash();
			// log.info("Transfer transactionHash:" + transactionHash);
			return transactionHash;
		}
	}


}