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

import com.xcong.excoin.utils.RedisUtils;
import org.springframework.stereotype.Service;
import org.web3j.crypto.Credentials;
import org.web3j.protocol.Web3j;
import org.web3j.protocol.core.DefaultBlockParameterName;
import org.web3j.protocol.core.DefaultBlockParameterNumber;
import org.web3j.protocol.core.methods.request.EthFilter;
import org.web3j.protocol.http.HttpService;
import org.web3j.tx.gas.StaticGasProvider;

import javax.annotation.Resource;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.ArrayList;
import java.util.List;

@Service
public class UsdtErc20UpdateService {
    public final static List<String> ALL_ADDRESS_LIST = new ArrayList<>();

    public final static String USDT_BLOCK_NUM = "USDT_BLOCK_NUM";

    private final static BigInteger DIVIDE_USDT = new BigInteger("1000000");

    private static Web3j web3;

    private static Web3j getInstance() {
        if (web3 == null) {
            HttpService httpService = new HttpService(blockchainNode);
            web3 = Web3j.build(httpService);
        }
        return web3;
    }

    public static  BigInteger GAS_PRICE = BigInteger.valueOf(45000000000L);
    //public static final BigInteger GAS_LIMIT = BigInteger.valueOf(4300000L);
    public static final BigInteger GAS_LIMIT = BigInteger.valueOf(2000000L);
    private static StaticGasProvider getStaticGasProvider(){
        return new StaticGasProvider(GAS_PRICE,GAS_LIMIT);
    }

    private static Web3j getInstanceScope() {

        HttpService httpService = new HttpService(blockchainNode);
        return Web3j.build(httpService);
    }

    private static String blockchainNode = "http://120.55.86.146:8545";

    private static String contractAddr = "0xdac17f958d2ee523a2206206994597c13d831ec7";


    // 操作账号
    private static String privateKey = "4576fafdd215f52051c60e04618ef8997fbc5cee8413d3b34d210e296e6e9a3d";


    @Resource
    private RedisUtils redisUtils;
    public void updateUsdt(){
        // 获取最新区块
        String string = redisUtils.getString(USDT_BLOCK_NUM);
        BigInteger blockNum = new BigInteger(string);
        Credentials credentials = Credentials.create(privateKey);
        EthUsdtContract contract = EthUsdtContract.load(contractAddr, web3, credentials, getStaticGasProvider());
        EthFilter filter = getFilter(new BigInteger("10943021"));
        contract.transferEventFlowable(filter).subscribe(e->{
            if(e!=null){
                String transactionHash = e.log.getTransactionHash();
                String toAddress = e.to;
                BigInteger tokenBalance = e.tokens;
                // 金额
                BigInteger divide = tokenBalance.divide(DIVIDE_USDT);
                // 发送消息队列 TODO

            }
        });

    }

    private static EthFilter getFilter(BigInteger startBlock) {
        if (startBlock != null) {
            EthFilter filter = new EthFilter(new DefaultBlockParameterNumber(startBlock),
                    DefaultBlockParameterName.LATEST, contractAddr);
            return filter;
        } else {
            return new EthFilter(DefaultBlockParameterName.EARLIEST,
                    DefaultBlockParameterName.LATEST, contractAddr);
        }


    }
}