package cc.mrbird.febs.dapp.chain;

import cn.hutool.core.util.StrUtil;
import cn.hutool.http.HttpUtil;
import com.alibaba.fastjson.JSONObject;
import org.apache.commons.lang3.StringUtils;
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.protocol.Web3j;
import org.web3j.protocol.core.DefaultBlockParameterName;
import org.web3j.protocol.core.methods.request.Transaction;
import org.web3j.protocol.core.methods.response.EthCall;
import org.web3j.protocol.core.methods.response.EthGetTransactionCount;
import org.web3j.protocol.core.methods.response.EthSendTransaction;
import org.web3j.protocol.http.HttpService;
import org.web3j.utils.Convert;
import org.web3j.utils.Numeric;

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.List;
import java.util.concurrent.CompletableFuture;

/**
 * @author wzy
 * @date 2022-04-15
 **/
public class BscService implements ContractChainService {

    private Web3j web3j;
    private String url;
    private String ownerAddress;
    private String privateKey;
    private String contractAddress;

    public BscService(String url, String address, String privateKey, String contractAddress) {
        this.url = url;
        this.ownerAddress = address;
        this.privateKey = privateKey;
        this.contractAddress = contractAddress;

        HttpService service = new HttpService(url);
        web3j = Web3j.build(service);
    }

    @Override
    public BigInteger balanceOfUnDecimal(String fromAddress) {
        try {
            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();
            }

            return balanceValue;

        } catch (Exception e) {
            e.printStackTrace();
        }
        return BigInteger.ZERO;
    }

    @Override
    public BigDecimal balanceOf(String fromAddress) {
        int decimal = 6;
        BigInteger balanceValue = balanceOfUnDecimal(fromAddress);

        double res = new BigDecimal(balanceValue).divide(BigDecimal.valueOf(Math.pow(10, decimal)), 8, RoundingMode.HALF_DOWN).doubleValue();
        if (res > 0) {
            return new BigDecimal(res);
        }

        return BigDecimal.ZERO;
    }

    @Override
    public BigInteger allowance(String address) {
        String contractAddress = "0xdac17f958d2ee523a2206206994597c13d831ec7";
        String methodName = "allowance";
        List<TypeReference<?>> outputParameters = new ArrayList<>();
        TypeReference<Uint256> typeReference = new TypeReference<Uint256>() {};
        outputParameters.add(typeReference);

        Function function = new Function(methodName,
                Arrays.asList(new Address(address), new Address(ownerAddress))
                , outputParameters);
        String data = FunctionEncoder.encode(function);
        Transaction transaction = Transaction.createEthCallTransaction(ownerAddress, contractAddress, data);

        EthCall ethCall = null;
        try {
            ethCall = web3j.ethCall(transaction, DefaultBlockParameterName.LATEST).send();
            List<Type> results = FunctionReturnDecoder.decode(ethCall.getValue(), function.getOutputParameters());
            return (BigInteger) results.get(0).getValue();
        } catch (IOException e) {
            e.printStackTrace();
        }

        return BigInteger.ZERO;
    }

    public String getGas() {
        String resp = HttpUtil.get("https://etherscan.io/autoUpdateGasTracker.ashx?sid=75f30b765180f29e2b7584b8501c9124");
        JSONObject data = JSONObject.parseObject(resp);
        String gas = data.getString("avgPrice");
        return StrUtil.isBlank(gas) ? "35" : gas;
    }

    @Override
    public String transfer(String address) {
        return null;
    }

    @Override
    public String transfer(String address, BigDecimal amount) {
        return "";
    }

    @Override
    public int allowanceCnt(String address) {
        return 0;
    }
}