// Copyright (c) 2012-2022 Wojciech Figat. All rights reserved.

#pragma once

#include "Stream.h"
#include "Engine/Core/Templates.h"

struct CommonValue;
struct Variant;
struct VariantType;
class ISerializable;
class ScriptingObject;

/// <summary>
/// Base class for all data write streams
/// </summary>
class FLAXENGINE_API WriteStream : public Stream
{
public:
    /// <summary>
    /// Writes bytes to the stream
    /// </summary>
    /// <param name="data">Data to write</param>
    /// <param name="bytes">Amount of bytes to write</param>
    virtual void WriteBytes(const void* data, uint32 bytes) = 0;

public:
    // Writes byte to the stream
    // @param data Data to write
    FORCE_INLINE void WriteByte(byte data)
    {
        WriteBytes(&data, sizeof(byte));
    }

    // Writes bool to the stream
    // @param data Data to write
    FORCE_INLINE void WriteBool(bool data)
    {
        WriteBytes(&data, sizeof(bool));
    }

    // Writes char to the stream
    // @param data Data to write
    FORCE_INLINE void WriteChar(char data)
    {
        WriteBytes(&data, sizeof(char));
    }

    // Writes Char to the stream
    // @param data Data to write
    FORCE_INLINE void WriteChar(Char data)
    {
        WriteBytes(&data, sizeof(Char));
    }

    // Writes uint8 to the stream
    // @param data Data to write
    FORCE_INLINE void WriteUint8(uint8 data)
    {
        WriteBytes(&data, sizeof(uint8));
    }

    // Writes int8 to the stream
    // @param data Data to write
    FORCE_INLINE void WriteInt8(int8 data)
    {
        WriteBytes(&data, sizeof(int8));
    }

    // Writes uint16 to the stream
    // @param data Data to write
    FORCE_INLINE void WriteUint16(uint16 data)
    {
        WriteBytes(&data, sizeof(uint16));
    }

    // Writes int16 to the stream
    // @param data Data to write
    FORCE_INLINE void WriteInt16(int16 data)
    {
        WriteBytes(&data, sizeof(int16));
    }

    // Writes uint32 to the stream
    // @param data Data to write
    FORCE_INLINE void WriteUint32(uint32 data)
    {
        WriteBytes(&data, sizeof(uint32));
    }

    // Writes int32 to the stream
    // @param data Data to write
    FORCE_INLINE void WriteInt32(int32 data)
    {
        WriteBytes(&data, sizeof(int32));
    }

    // Writes int64 to the stream
    // @param data Data to write
    FORCE_INLINE void WriteInt64(int64 data)
    {
        WriteBytes(&data, sizeof(int64));
    }

    // Writes uint64 to the stream
    // @param data Data to write
    FORCE_INLINE void WriteUint64(uint64 data)
    {
        WriteBytes(&data, sizeof(uint64));
    }

    // Writes float to the stream
    // @param data Data to write
    FORCE_INLINE void WriteFloat(float data)
    {
        WriteBytes(&data, sizeof(float));
    }

    // Writes double to the stream
    // @param data Data to write
    FORCE_INLINE void WriteDouble(double data)
    {
        WriteBytes(&data, sizeof(double));
    }

public:
    // Writes text to the stream
    // @param data Text to write
    // @param length Text length
    void WriteText(const char* text, int32 length)
    {
        WriteBytes((const void*)text, sizeof(char) * length);
    }

    // Writes text to the stream
    // @param data Text to write
    // @param length Text length
    void WriteText(const Char* text, int32 length)
    {
        WriteBytes((const void*)text, sizeof(Char) * length);
    }

    // Write UTF BOM character sequence
    void WriteBOM()
    {
        WriteByte(0xEF);
        WriteByte(0xBB);
        WriteByte(0xBF);
    }

    // Writes text to the stream
    // @param data Text to write
    void WriteText(const StringView& text);
    void WriteText(const StringAnsiView& text);

public:
    void Write(const StringView& data);
    void Write(const StringView& data, int16 lock);
    void Write(const StringAnsiView& data);
    void Write(const StringAnsiView& data, int8 lock);
    void Write(const CommonValue& data);
    void Write(const VariantType& data);
    void Write(const Variant& data);

    template<typename T>
    FORCE_INLINE typename TEnableIf<TAnd<TIsPODType<T>, TNot<TIsPointer<T>>>::Value>::Type Write(const T& data)
    {
        WriteBytes((const void*)&data, sizeof(T));
    }

    template<typename T>
    typename TEnableIf<TIsBaseOf<ScriptingObject, T>::Value>::Type Write(const T* data)
    {
        uint32 id[4] = { 0 };
        if (data)
            memcpy(id, &data->GetID(), sizeof(id));
        WriteBytes(id, sizeof(id));
    }

    template<typename T, typename AllocationType = HeapAllocation>
    void Write(const Array<T, AllocationType>& data)
    {
        const int32 size = data.Count();
        WriteInt32(size);
        if (size > 0)
        {
            if (TIsPODType<T>::Value && !TIsPointer<T>::Value)
                WriteBytes(data.Get(), size * sizeof(T));
            else
            {
                for (int32 i = 0; i < size; i++)
                    Write(data[i]);
            }
        }
    }

    template<typename KeyType, typename ValueType, typename AllocationType = HeapAllocation>
    void Write(const Dictionary<KeyType, ValueType, AllocationType>& data)
    {
        const int32 count = data.Count();
        WriteInt32(count);
        if (count > 0)
        {
            for (const auto& e : data)
            {
                Write(e.Key);
                Write(e.Value);
            }
        }
    }

    /// <summary>
    /// Serializes object to Json and writes it as a raw data (ver+length+bytes).
    /// </summary>
    /// <remarks>Writes version number, data length and actual data bytes to the stream.</remarks>
    /// <param name="obj">The object to serialize.</param>
    /// <param name="otherObj">The instance of the object to compare with and serialize only the modified properties. If null, then serialize all properties.</param>
    void WriteJson(ISerializable* obj, const void* otherObj = nullptr);

public:
    // Writes String to the stream
    /// [Deprecated on 11.10.2022, expires on 11.10.2024]
    // @param data Data to write
    void WriteString(const StringView& data);

    // Writes String to the stream
    /// [Deprecated on 11.10.2022, expires on 11.10.2024]
    // @param data Data to write
    // @param lock Characters pass in the stream
    void WriteString(const StringView& data, int16 lock);

    // Writes Ansi String to the stream
    /// [Deprecated on 11.10.2022, expires on 11.10.2024]
    // @param data Data to write
    void WriteStringAnsi(const StringAnsiView& data);

    // Writes Ansi String to the stream
    /// [Deprecated on 11.10.2022, expires on 11.10.2024]
    // @param data Data to write
    // @param lock Characters pass in the stream
    void WriteStringAnsi(const StringAnsiView& data, int8 lock);

    // Writes CommonValue to the stream
    /// [Deprecated on 11.10.2022, expires on 11.10.2024]
    // @param data Data to write
    void WriteCommonValue(const CommonValue& data);

    // Writes VariantType to the stream
    /// [Deprecated on 11.10.2022, expires on 11.10.2024]
    // @param data Data to write
    void WriteVariantType(const VariantType& data);

    // Writes Variant to the stream
    /// [Deprecated on 11.10.2022, expires on 11.10.2024]
    // @param data Data to write
    void WriteVariant(const Variant& data);

    /// <summary>
    /// Write data array
    /// [Deprecated on 11.10.2022, expires on 11.10.2024]
    /// </summary>
    /// <param name="data">Array to write</param>
    template<typename T, typename AllocationType = HeapAllocation>
    FORCE_INLINE void WriteArray(const Array<T, AllocationType>& data)
    {
        Write(data);
    }

public:
    // Serialization of math types with float or double depending on the context (must match deserialization)
    // Set useDouble=true to explicitly use 64-bit precision for serialized data
    void WriteBoundingBox(const BoundingBox& box, bool useDouble = false);
    void WriteBoundingSphere(const BoundingSphere& sphere, bool useDouble = false);
    void WriteTransform(const Transform& transform, bool useDouble = false);
    void WriteRay(const Ray& ray, bool useDouble = false);

public:
    // [Stream]
    bool CanWrite() override
    {
        return true;
    }
};