// Copyright 2020 The Dawn Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#include "dawn/native/d3d12/QuerySetD3D12.h"

#include <algorithm>

#include "dawn/native/d3d/D3DError.h"
#include "dawn/native/d3d12/DeviceD3D12.h"
#include "dawn/native/d3d12/UtilsD3D12.h"

namespace dawn::native::d3d12 {

namespace {
D3D12_QUERY_HEAP_TYPE D3D12QueryHeapType(wgpu::QueryType type) {
    switch (type) {
        case wgpu::QueryType::Occlusion:
            return D3D12_QUERY_HEAP_TYPE_OCCLUSION;
        case wgpu::QueryType::PipelineStatistics:
            return D3D12_QUERY_HEAP_TYPE_PIPELINE_STATISTICS;
        case wgpu::QueryType::Timestamp:
            return D3D12_QUERY_HEAP_TYPE_TIMESTAMP;
    }
}
}  // anonymous namespace

// static
ResultOrError<Ref<QuerySet>> QuerySet::Create(Device* device,
                                              const QuerySetDescriptor* descriptor) {
    Ref<QuerySet> querySet = AcquireRef(new QuerySet(device, descriptor));
    DAWN_TRY(querySet->Initialize());
    return querySet;
}

MaybeError QuerySet::Initialize() {
    D3D12_QUERY_HEAP_DESC queryHeapDesc = {};
    queryHeapDesc.Type = D3D12QueryHeapType(GetQueryType());
    queryHeapDesc.Count = std::max(GetQueryCount(), uint32_t(1u));

    ID3D12Device* d3d12Device = ToBackend(GetDevice())->GetD3D12Device();
    DAWN_TRY(CheckOutOfMemoryHRESULT(
        d3d12Device->CreateQueryHeap(&queryHeapDesc, IID_PPV_ARGS(&mQueryHeap)),
        "ID3D12Device::CreateQueryHeap"));

    SetLabelImpl();

    return {};
}

ID3D12QueryHeap* QuerySet::GetQueryHeap() const {
    return mQueryHeap.Get();
}

QuerySet::~QuerySet() = default;

void QuerySet::DestroyImpl() {
    QuerySetBase::DestroyImpl();
    ToBackend(GetDevice())->ReferenceUntilUnused(mQueryHeap);
    mQueryHeap = nullptr;
}

void QuerySet::SetLabelImpl() {
    SetDebugName(ToBackend(GetDevice()), mQueryHeap.Get(), "Dawn_QuerySet", GetLabel());
}

}  // namespace dawn::native::d3d12