//
//  JsonRead.h
//  cocos2d_libs
//
//  Created by 徐俊杰 on 2020/6/5.
//

#ifndef JsonRead_h
#define JsonRead_h

#include "rparticle/Macros/RParticleMacros.h"
#include "json/rapidjson.h"
#include "json/document.h"
#include "rparticle/Serialize/TransferFunctions/TransferBase.h"
#include "rparticle/Serialize/TransferFunctions/JsonSerializeTraits.h"
#include <stack>

NS_RRP_BEGIN

class JsonRead : public TransferBase
{
public:
    JsonRead(const std::string &content);
    bool IsReading () { return true; }

    template<class T>
    void Transfer (T& data, const char* name, int metaFlag = 0);
    
    template<class T>
    void TransferDeepData (T& data);
    
    template<class T>
    void TransferBasicData (T& data);
    
    template<class T>
    void TransferSTLStyleArray (T& data, int metaFlag = 0);

private:
    rapidjson::Document document;
    std::string currentKey;    
    std::stack<rapidjson::Value*> valueStack;
};

template<class T>
void JsonRead::Transfer (T& data, const char* _name, int metaFlag)
{
    currentKey = _name;
    JsonSerializeTraits<T>::Transfer (data, *this);
}

template<class T>
inline void JsonRead::TransferDeepData (T& data)
{
    rapidjson::Value* value = valueStack.top();
    valueStack.push(&((*value)[currentKey.c_str()]));
    
    data.Transfer (*this);
    
    valueStack.pop();
}

template<>
inline void JsonRead::TransferBasicData<SInt64> (SInt64& data)
{
    const rapidjson::Value& value = *(valueStack.top());
    data = value[currentKey.c_str()].GetInt64();
}

template<>
inline void JsonRead::TransferBasicData<UInt64> (UInt64& data)
{
    const rapidjson::Value& value = *(valueStack.top());
    data = value[currentKey.c_str()].GetUint64();
}

template<>
inline void JsonRead::TransferBasicData<float> (float& data)
{
    const rapidjson::Value& value = *(valueStack.top());
    data = value[currentKey.c_str()].GetDouble();
}

template<>
inline void JsonRead::TransferBasicData<double> (double& data)
{
    const rapidjson::Value& value = *(valueStack.top());
    data = value[currentKey.c_str()].GetDouble();
}

template<>
inline void JsonRead::TransferBasicData<char> (char& data)
{
//    jsonWriter.String(data);
//    const rapidjson::Value& value = *(valueStack.top());
//    data = value[currentKey.c_str()].GetInt64();
}

template<>
inline void JsonRead::TransferBasicData<SInt8> (SInt8& data)
{
    const rapidjson::Value& value = *(valueStack.top());
    data = value[currentKey.c_str()].GetInt();
}

template<>
inline void JsonRead::TransferBasicData<UInt8> (UInt8& data)
{
    const rapidjson::Value& value = *(valueStack.top());
    data = value[currentKey.c_str()].GetUint();
}

template<>
inline void JsonRead::TransferBasicData<int> (int& data)
{
    const rapidjson::Value& value = *(valueStack.top());
    data = value[currentKey.c_str()].GetInt();
}

template<>
inline void JsonRead::TransferBasicData<long> (long& data)
{
    const rapidjson::Value& value = *(valueStack.top());
    data = value[currentKey.c_str()].GetInt();
}

template<>
inline void JsonRead::TransferBasicData<unsigned int> (unsigned int& data)
{
    const rapidjson::Value& value = *(valueStack.top());
    data = value[currentKey.c_str()].GetUint();
}

template<>
inline void JsonRead::TransferBasicData<unsigned long> (unsigned long& data)
{
    const rapidjson::Value& value = *(valueStack.top());
    data = value[currentKey.c_str()].GetUint();
}

template<>
inline void JsonRead::TransferBasicData<SInt16> (SInt16& data)
{
    const rapidjson::Value& value = *(valueStack.top());
    data = value[currentKey.c_str()].GetInt();
}

template<>
inline void JsonRead::TransferBasicData<UInt16> (UInt16& data)
{
    const rapidjson::Value& value = *(valueStack.top());
    data = value[currentKey.c_str()].GetUint();
}

template<>
inline void JsonRead::TransferBasicData<bool> (bool& data)
{
    const rapidjson::Value& value = *(valueStack.top());
    data = value[currentKey.c_str()].GetBool();
}

template<>
inline void JsonRead::TransferBasicData<std::string> (std::string& data)
{
//    jsonWriter.String(data.c_str());
    const rapidjson::Value& value = *(valueStack.top());
    data = value[currentKey.c_str()].GetString();
}

template<class T>
void JsonRead::TransferSTLStyleArray (T& data, int metaFlag)
{
    rapidjson::Value* value = valueStack.top();
    rapidjson::Value* arr = &((*value)[currentKey.c_str()]);
    
    SerializeTraits<T>::ResizeSTLStyleArray (data, arr->Size());
    typename T::iterator dataIterator = data.begin ();

    for (int i = 0; i < arr->Size(); i++) {
        rapidjson::Value* obj = &((*arr)[i]);
        valueStack.push(obj);
        
        Transfer(*dataIterator, "data", metaFlag);
        ++dataIterator;
        
        valueStack.pop();
    }
}

NS_RRP_END

#endif /* JsonRead_h */