// Copyright 2019 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.

#ifndef SRC_DAWN_NATIVE_COMMANDENCODER_H_
#define SRC_DAWN_NATIVE_COMMANDENCODER_H_

#include "dawn/native/dawn_platform.h"

#include "dawn/native/EncodingContext.h"
#include "dawn/native/Error.h"
#include "dawn/native/ObjectBase.h"
#include "dawn/native/PassResourceUsage.h"

#include <string>

namespace dawn::native {

    enum class UsageValidationMode;

    MaybeError ValidateCommandEncoderDescriptor(const DeviceBase* device,
                                                const CommandEncoderDescriptor* descriptor);

    class CommandEncoder final : public ApiObjectBase {
      public:
        static Ref<CommandEncoder> Create(DeviceBase* device,
                                          const CommandEncoderDescriptor* descriptor);
        static CommandEncoder* MakeError(DeviceBase* device);

        ObjectType GetType() const override;

        CommandIterator AcquireCommands();
        CommandBufferResourceUsage AcquireResourceUsages();

        void TrackUsedQuerySet(QuerySetBase* querySet);
        void TrackQueryAvailability(QuerySetBase* querySet, uint32_t queryIndex);

        // Dawn API
        ComputePassEncoder* APIBeginComputePass(const ComputePassDescriptor* descriptor);
        RenderPassEncoder* APIBeginRenderPass(const RenderPassDescriptor* descriptor);

        void APICopyBufferToBuffer(BufferBase* source,
                                   uint64_t sourceOffset,
                                   BufferBase* destination,
                                   uint64_t destinationOffset,
                                   uint64_t size);
        void APICopyBufferToTexture(const ImageCopyBuffer* source,
                                    const ImageCopyTexture* destination,
                                    const Extent3D* copySize);
        void APICopyTextureToBuffer(const ImageCopyTexture* source,
                                    const ImageCopyBuffer* destination,
                                    const Extent3D* copySize);
        void APICopyTextureToTexture(const ImageCopyTexture* source,
                                     const ImageCopyTexture* destination,
                                     const Extent3D* copySize);
        void APICopyTextureToTextureInternal(const ImageCopyTexture* source,
                                             const ImageCopyTexture* destination,
                                             const Extent3D* copySize);
        void APIClearBuffer(BufferBase* destination, uint64_t destinationOffset, uint64_t size);

        void APIInjectValidationError(const char* message);
        void APIInsertDebugMarker(const char* groupLabel);
        void APIPopDebugGroup();
        void APIPushDebugGroup(const char* groupLabel);

        void APIResolveQuerySet(QuerySetBase* querySet,
                                uint32_t firstQuery,
                                uint32_t queryCount,
                                BufferBase* destination,
                                uint64_t destinationOffset);
        void APIWriteBuffer(BufferBase* buffer,
                            uint64_t bufferOffset,
                            const uint8_t* data,
                            uint64_t size);
        void APIWriteTimestamp(QuerySetBase* querySet, uint32_t queryIndex);

        CommandBufferBase* APIFinish(const CommandBufferDescriptor* descriptor = nullptr);

        Ref<ComputePassEncoder> BeginComputePass(const ComputePassDescriptor* descriptor = nullptr);
        Ref<RenderPassEncoder> BeginRenderPass(const RenderPassDescriptor* descriptor);
        ResultOrError<Ref<CommandBufferBase>> Finish(
            const CommandBufferDescriptor* descriptor = nullptr);

      private:
        CommandEncoder(DeviceBase* device, const CommandEncoderDescriptor* descriptor);
        CommandEncoder(DeviceBase* device, ObjectBase::ErrorTag tag);

        void DestroyImpl() override;

        // Helper to be able to implement both APICopyTextureToTexture and
        // APICopyTextureToTextureInternal. The only difference between both
        // copies, is that the Internal one will also check internal usage.
        template <bool Internal>
        void APICopyTextureToTextureHelper(const ImageCopyTexture* source,
                                           const ImageCopyTexture* destination,
                                           const Extent3D* copySize);

        MaybeError ValidateFinish() const;

        EncodingContext mEncodingContext;
        std::set<BufferBase*> mTopLevelBuffers;
        std::set<TextureBase*> mTopLevelTextures;
        std::set<QuerySetBase*> mUsedQuerySets;

        uint64_t mDebugGroupStackSize = 0;

        UsageValidationMode mUsageValidationMode;
    };

}  // namespace dawn::native

#endif  // SRC_DAWN_NATIVE_COMMANDENCODER_H_