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package com.volcengine.tos.internal.util;

import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.core.type.TypeReference;
import com.volcengine.tos.TosClientException;
import com.volcengine.tos.internal.TosMarshalResult;
import com.volcengine.tos.internal.util.base64.Base64;

import java.io.IOException;
import java.io.InputStream;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class PayloadConverter {
    public static TosMarshalResult serializePayloadAndComputeMD5(Object input) throws TosClientException {
        byte[] content;
        String contentMD5;
        try{
            content = TosUtils.getJsonMapper().setSerializationInclusion(JsonInclude.Include.NON_NULL).writeValueAsBytes(input);
            MessageDigest md = MessageDigest.getInstance("MD5");
            byte[] bytes = md.digest(content);
            contentMD5 = new String(Base64.encodeBase64(bytes));
        } catch (JsonProcessingException | NoSuchAlgorithmException e){
            throw new TosClientException("tos: unable to do serialization", e);
        }
        return new TosMarshalResult(contentMD5, content);
    }

    public static TosMarshalResult serializePayload(Object input) throws TosClientException {
        byte[] content;
        try{
            content = TosUtils.getJsonMapper().setSerializationInclusion(JsonInclude.Include.NON_NULL).writeValueAsBytes(input);
        } catch (JsonProcessingException e){
            throw new TosClientException("tos: unable to do serialization", e);
        }
        return new TosMarshalResult("", content);
    }

    public static  T parsePayload(InputStream reader, TypeReference valueTypeRef) throws TosClientException {
        try{
            return TosUtils.getJsonMapper().readValue(reader, valueTypeRef);
        } catch (IOException e){
            throw new TosClientException("tos: unable to do deserialization", e);
        }
    }

    public static  T parsePayload(String reader, TypeReference valueTypeRef) throws TosClientException {
        try{
            return TosUtils.getJsonMapper().readValue(reader, valueTypeRef);
        } catch (IOException e){
            throw new TosClientException("tos: unable to do deserialization of " + reader, e);
        }
    }
}