// Copyright 2021 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 "src/dawn/node/binding/GPUComputePassEncoder.h"

#include <utility>

#include "src/dawn/node/binding/Converter.h"
#include "src/dawn/node/binding/GPUBindGroup.h"
#include "src/dawn/node/binding/GPUBuffer.h"
#include "src/dawn/node/binding/GPUComputePipeline.h"
#include "src/dawn/node/binding/GPUQuerySet.h"
#include "src/dawn/node/utils/Debug.h"

namespace wgpu::binding {

////////////////////////////////////////////////////////////////////////////////
// wgpu::bindings::GPUComputePassEncoder
////////////////////////////////////////////////////////////////////////////////
GPUComputePassEncoder::GPUComputePassEncoder(wgpu::ComputePassEncoder enc) : enc_(std::move(enc)) {}

void GPUComputePassEncoder::setPipeline(Napi::Env,
                                        interop::Interface<interop::GPUComputePipeline> pipeline) {
    enc_.SetPipeline(*pipeline.As<GPUComputePipeline>());
}

void GPUComputePassEncoder::dispatch(Napi::Env,
                                     interop::GPUSize32 workgroupCountX,
                                     interop::GPUSize32 workgroupCountY,
                                     interop::GPUSize32 workgroupCountZ) {
    enc_.Dispatch(workgroupCountX, workgroupCountY, workgroupCountZ);
}

void GPUComputePassEncoder::dispatchIndirect(Napi::Env,
                                             interop::Interface<interop::GPUBuffer> indirectBuffer,
                                             interop::GPUSize64 indirectOffset) {
    enc_.DispatchIndirect(*indirectBuffer.As<GPUBuffer>(), indirectOffset);
}

void GPUComputePassEncoder::end(Napi::Env) {
    enc_.End();
}

void GPUComputePassEncoder::setBindGroup(
    Napi::Env env,
    interop::GPUIndex32 index,
    interop::Interface<interop::GPUBindGroup> bindGroup,
    std::vector<interop::GPUBufferDynamicOffset> dynamicOffsets) {
    Converter conv(env);

    wgpu::BindGroup bg{};
    uint32_t* offsets = nullptr;
    uint32_t num_offsets = 0;
    if (!conv(bg, bindGroup) || !conv(offsets, num_offsets, dynamicOffsets)) {
        return;
    }

    enc_.SetBindGroup(index, bg, num_offsets, offsets);
}

void GPUComputePassEncoder::setBindGroup(Napi::Env env,
                                         interop::GPUIndex32 index,
                                         interop::Interface<interop::GPUBindGroup> bindGroup,
                                         interop::Uint32Array dynamicOffsetsData,
                                         interop::GPUSize64 dynamicOffsetsDataStart,
                                         interop::GPUSize32 dynamicOffsetsDataLength) {
    Converter conv(env);

    wgpu::BindGroup bg{};
    if (!conv(bg, bindGroup)) {
        return;
    }

    if (dynamicOffsetsDataStart > dynamicOffsetsData.ElementLength()) {
        Napi::RangeError::New(env, "dynamicOffsetsDataStart is out of bound of dynamicOffsetData")
            .ThrowAsJavaScriptException();
        return;
    }

    if (dynamicOffsetsDataLength > dynamicOffsetsData.ElementLength() - dynamicOffsetsDataStart) {
        Napi::RangeError::New(env,
                              "dynamicOffsetsDataLength + dynamicOffsetsDataStart is out of "
                              "bound of dynamicOffsetData")
            .ThrowAsJavaScriptException();
        return;
    }

    enc_.SetBindGroup(index, bg, dynamicOffsetsDataLength,
                      dynamicOffsetsData.Data() + dynamicOffsetsDataStart);
}

void GPUComputePassEncoder::pushDebugGroup(Napi::Env, std::string groupLabel) {
    enc_.PushDebugGroup(groupLabel.c_str());
}

void GPUComputePassEncoder::popDebugGroup(Napi::Env) {
    enc_.PopDebugGroup();
}

void GPUComputePassEncoder::insertDebugMarker(Napi::Env, std::string markerLabel) {
    enc_.InsertDebugMarker(markerLabel.c_str());
}

std::variant<std::string, interop::UndefinedType> GPUComputePassEncoder::getLabel(Napi::Env) {
    UNIMPLEMENTED();
}

void GPUComputePassEncoder::setLabel(Napi::Env,
                                     std::variant<std::string, interop::UndefinedType> value) {
    UNIMPLEMENTED();
}

}  // namespace wgpu::binding