//
//  SubModule.cpp
//  cocos2d_libs
//
//  Created by 徐俊杰 on 2020/4/24.
//

#include "rparticle/Modules/SubModule.h"

//#include "UnityPrefix.h"
//#include "rparticle/Modules/SubModule.h"
//#include "Runtime/BaseClasses/ObjectDefines.h"
//#include "Runtime/Serialize/TransferFunctions/SerializeTransfer.h"
#include "rparticle/ParticleSystemUtils.h"
#include "rparticle/RParticleSystem.h" // Only because of PPtr comparison

NS_RRP_BEGIN

bool IsUsingSubEmitter(RParticleSystem* emitter)
{
    const void* shurikenSelf = NULL;
    return emitter != shurikenSelf;
}

SubModule::SubModule () : ParticleSystemModule(false)
{
}

void SubModule::Update (const ParticleSystemReadOnlyState& roState, ParticleSystemState& state, ParticleSystemParticles& ps, size_t fromIndex, size_t toIndex, float dt) const
{
    Assert(state.numCachedSubDataBirth <= kParticleSystemMaxNumEmitAccumulators);
    for(int i = 0; i < state.numCachedSubDataBirth; i++)
    {
        const ParticleSystemSubEmitterData& data = state.cachedSubDataBirth[i];
        //const bool culled = (data.maxLifetime < state.accumulatedDt);
        const float startDelay = data.startDelayInSec;
        const float length = data.lengthInSec;
        for (int q = fromIndex; q < toIndex; ++q)
        {
            const float t = std::max(0.0f, ps.startLifetime[q] - ps.lifetime[q] - dt) - startDelay;
            const bool started = (t >= 0.0f);
            const bool ended = (t >= length);
            if(started && !ended)
            {
                ParticleSystemEmissionState emissionState;
                emissionState.m_ToEmitAccumulator = ps.emitAccumulator[i][q];
                RecordEmit(emissionState, data, roState, state, ps, kParticleSystemSubTypeBirth, i, q, t, dt, length);
                ps.emitAccumulator[i][q] = emissionState.m_ToEmitAccumulator;
            }
        }
    }
}

/*
void SubModule::RemoveDuplicatePtrs (RParticleSystem** shurikens)
{
    for(int i = 0; i < kParticleSystemMaxSubTotal-1; i++)
        for(int j = i+1; j < kParticleSystemMaxSubTotal; j++)
            if(shurikens[i] && (shurikens[i] == shurikens[j]))
                shurikens[i] = NULL;
}

// This can not be cached between frames since the referenced particle systems might be deleted at any point.
int SubModule::GetSubEmitterPtrs (RParticleSystem** subEmitters) const
{
    for(int i = 0; i < kParticleSystemMaxSubTotal; i++)
        subEmitters[i] = NULL;
    
    int numSubEmitters = 0;
    for(int i = 0; i < kParticleSystemMaxSubBirth; i++)
    {
        RParticleSystem* subParticleSystem = m_SubEmittersBirth[i];
        if (IsUsingSubEmitter(subParticleSystem))
            subEmitters[numSubEmitters++] = subParticleSystem;
    }
    for(int i = 0; i < kParticleSystemMaxSubCollision; i++)
    {
        RParticleSystem* subParticleSystem = m_SubEmittersCollision[i];
        if (IsUsingSubEmitter(subParticleSystem))
            subEmitters[numSubEmitters++] = subParticleSystem;
    }
    for(int i = 0; i < kParticleSystemMaxSubDeath; i++)
    {
        RParticleSystem* subParticleSystem = m_SubEmittersDeath[i];
        if (IsUsingSubEmitter(subParticleSystem))
            subEmitters[numSubEmitters++] = subParticleSystem;
    }
    return numSubEmitters;
}

int SubModule::GetSubEmitterPtrsBirth (RParticleSystem** subEmitters) const
{
    int numSubEmitters = 0;
    for(int i = 0; i < kParticleSystemMaxSubBirth; i++)
    {
        RParticleSystem* subParticleSystem = m_SubEmittersBirth[i];
        if (IsUsingSubEmitter(subParticleSystem))
            subEmitters[numSubEmitters++] = subParticleSystem;
    }
    return numSubEmitters;
}

int SubModule::GetSubEmitterPtrsCollision (RParticleSystem** subEmitters) const
{
    int numSubEmitters = 0;
    for(int i = 0; i < kParticleSystemMaxSubCollision; i++)
    {
        RParticleSystem* subParticleSystem = m_SubEmittersCollision[i];
        if (IsUsingSubEmitter(subParticleSystem))
            subEmitters[numSubEmitters++] = subParticleSystem;
    }
    return numSubEmitters;
}

int SubModule::GetSubEmitterPtrsDeath(RParticleSystem** subEmitters) const
{
    int numSubEmitters = 0;
    for(int i = 0; i < kParticleSystemMaxSubDeath; i++)
    {
        RParticleSystem* subParticleSystem = m_SubEmittersDeath[i];
        if (IsUsingSubEmitter(subParticleSystem))
            subEmitters[numSubEmitters++] = subParticleSystem;
    }
    return numSubEmitters;
}

int SubModule::GetSubEmitterTypeCount(ParticleSystemSubType type) const
{
    int count = 0;
    const void* shurikenSelf = NULL;
    if(type == kParticleSystemSubTypeBirth) {
        for(int i = 0; i < kParticleSystemMaxSubBirth; i++)
            if(m_SubEmittersBirth[i] != shurikenSelf)
                count++;
    } else if(type == kParticleSystemSubTypeCollision) {
        for(int i = 0; i < kParticleSystemMaxSubCollision; i++)
            if(m_SubEmittersCollision[i] != shurikenSelf)
                count++;
    } else if(type == kParticleSystemSubTypeDeath) {
        for(int i = 0; i < kParticleSystemMaxSubDeath; i++)
            if(m_SubEmittersDeath[i] != shurikenSelf)
                count++;
    } else {
        Assert(!"Sub emitter type not implemented.");
    }
    return count;
}

template<class TransferFunction>
void SubModule::Transfer (TransferFunction& transfer)
{
    ParticleSystemModule::Transfer (transfer);
    transfer.Transfer (m_SubEmittersBirth[0], "subEmitterBirth");
    transfer.Transfer (m_SubEmittersBirth[1], "subEmitterBirth1");
    transfer.Transfer (m_SubEmittersCollision[0], "subEmitterCollision");
    transfer.Transfer (m_SubEmittersCollision[1], "subEmitterCollision1");
    transfer.Transfer (m_SubEmittersDeath[0], "subEmitterDeath");
    transfer.Transfer (m_SubEmittersDeath[1], "subEmitterDeath1");
}
INSTANTIATE_TEMPLATE_TRANSFER(SubModule)
 */

NS_RRP_END