#include "util/serialize_value.h"
#include <algorithm>
#include <string>
#include "util/coding.h"
#include <iostream>

namespace leveldb{
bool compareByFirst(const Field& a, const Field& b) {
    return a.first < b.first; // 按字段名升序排序
}

std::string SerializeValue(const FieldArray& fields){
    FieldArray sortFields = fields;
    std::sort(sortFields.begin(), sortFields.end(), compareByFirst);
    std::string result;
    for (const Field& pairs : sortFields) {
        PutLengthPrefixedSlice(&result, pairs.first);
        PutLengthPrefixedSlice(&result, pairs.second);
    }
    return result;
}

FieldArray *ParseValue(const std::string& value_str){
    Slice valueSlice(value_str);
    FieldArray *res = new FieldArray;
    Slice nameSlice = Slice();
    Slice valSlice = Slice();
    std::string nameStr;
    std::string valStr;
    while(GetLengthPrefixedSlice(&valueSlice, &nameSlice)){
        nameStr = nameSlice.ToString();

        if(GetLengthPrefixedSlice(&valueSlice, &valSlice)){
            valStr = valSlice.ToString();
            res->emplace_back(nameStr, valStr);
        } else {
            std::cout << "name and val not match!" << std::endl;
        }
        nameSlice = Slice();
        valSlice = Slice();
    }
    return res;
}
}