// Copyright 2021 The Dawn & Tint Authors
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#include "src/dawn/node/binding/GPURenderPassEncoder.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/GPUQuerySet.h"
#include "src/dawn/node/binding/GPURenderBundle.h"
#include "src/dawn/node/binding/GPURenderPipeline.h"

namespace wgpu::binding {

////////////////////////////////////////////////////////////////////////////////
// wgpu::bindings::GPURenderPassEncoder
////////////////////////////////////////////////////////////////////////////////
GPURenderPassEncoder::GPURenderPassEncoder(const wgpu::RenderPassDescriptor& desc,
                                           wgpu::RenderPassEncoder enc)
    : enc_(std::move(enc)), label_(CopyLabel(desc.label)) {}

void GPURenderPassEncoder::setViewport(Napi::Env,
                                       float x,
                                       float y,
                                       float width,
                                       float height,
                                       float minDepth,
                                       float maxDepth) {
    enc_.SetViewport(x, y, width, height, minDepth, maxDepth);
}

void GPURenderPassEncoder::setScissorRect(Napi::Env,
                                          interop::GPUIntegerCoordinate x,
                                          interop::GPUIntegerCoordinate y,
                                          interop::GPUIntegerCoordinate width,
                                          interop::GPUIntegerCoordinate height) {
    enc_.SetScissorRect(x, y, width, height);
}

void GPURenderPassEncoder::setBlendConstant(Napi::Env env, interop::GPUColor color) {
    Converter conv(env);

    wgpu::Color c{};
    if (!conv(c, color)) {
        return;
    }

    enc_.SetBlendConstant(&c);
}

void GPURenderPassEncoder::setStencilReference(Napi::Env, interop::GPUStencilValue reference) {
    enc_.SetStencilReference(reference);
}

void GPURenderPassEncoder::beginOcclusionQuery(Napi::Env, interop::GPUSize32 queryIndex) {
    enc_.BeginOcclusionQuery(queryIndex);
}

void GPURenderPassEncoder::endOcclusionQuery(Napi::Env) {
    enc_.EndOcclusionQuery();
}

void GPURenderPassEncoder::executeBundles(
    Napi::Env env,
    std::vector<interop::Interface<interop::GPURenderBundle>> bundles_in) {
    Converter conv(env);

    wgpu::RenderBundle* bundles = nullptr;
    size_t bundleCount = 0;
    if (!conv(bundles, bundleCount, bundles_in)) {
        return;
    }

    enc_.ExecuteBundles(bundleCount, bundles);
}

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

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

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

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

void GPURenderPassEncoder::setBindGroup(
    Napi::Env env,
    interop::GPUIndex32 index,
    std::optional<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 GPURenderPassEncoder::setImmediates(Napi::Env env,
                                         interop::GPUSize32 rangeOffset,
                                         interop::AllowSharedBufferSource data,
                                         interop::GPUSize64 dataOffsetElements,
                                         std::optional<interop::GPUSize64> sizeElements) {
    std::span<const uint8_t> dataSpan;
    if (!ConvertDataElementsToSpan(env, &dataSpan, data, dataOffsetElements, sizeElements)) {
        return;
    }

    enc_.SetImmediates(rangeOffset, dataSpan.data(), dataSpan.size());
}

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

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

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

void GPURenderPassEncoder::setPipeline(Napi::Env env,
                                       interop::Interface<interop::GPURenderPipeline> pipeline) {
    Converter conv(env);
    wgpu::RenderPipeline rp{};
    if (!conv(rp, pipeline)) {
        return;
    }
    enc_.SetPipeline(rp);
}

void GPURenderPassEncoder::setIndexBuffer(Napi::Env env,
                                          interop::Interface<interop::GPUBuffer> buffer,
                                          interop::GPUIndexFormat indexFormat,
                                          interop::GPUSize64 offset,
                                          std::optional<interop::GPUSize64> size) {
    Converter conv(env);

    wgpu::Buffer b{};
    wgpu::IndexFormat f;
    uint64_t s = wgpu::kWholeSize;
    if (!conv(b, buffer) ||       //
        !conv(f, indexFormat) ||  //
        !conv(s, size)) {
        return;
    }
    enc_.SetIndexBuffer(b, f, offset, s);
}

void GPURenderPassEncoder::setVertexBuffer(
    Napi::Env env,
    interop::GPUIndex32 slot,
    std::optional<interop::Interface<interop::GPUBuffer>> buffer,
    interop::GPUSize64 offset,
    std::optional<interop::GPUSize64> size) {
    Converter conv(env);

    wgpu::Buffer b{};
    uint64_t s = wgpu::kWholeSize;
    if (!conv(b, buffer) || !conv(s, size)) {
        return;
    }
    enc_.SetVertexBuffer(slot, b, offset, s);
}

void GPURenderPassEncoder::draw(Napi::Env env,
                                interop::GPUSize32 vertexCount,
                                interop::GPUSize32 instanceCount,
                                interop::GPUSize32 firstVertex,
                                interop::GPUSize32 firstInstance) {
    enc_.Draw(vertexCount, instanceCount, firstVertex, firstInstance);
}

void GPURenderPassEncoder::drawIndexed(Napi::Env env,
                                       interop::GPUSize32 indexCount,
                                       interop::GPUSize32 instanceCount,
                                       interop::GPUSize32 firstIndex,
                                       interop::GPUSignedOffset32 baseVertex,
                                       interop::GPUSize32 firstInstance) {
    enc_.DrawIndexed(indexCount, instanceCount, firstIndex, baseVertex, firstInstance);
}

void GPURenderPassEncoder::drawIndirect(Napi::Env env,
                                        interop::Interface<interop::GPUBuffer> indirectBuffer,
                                        interop::GPUSize64 indirectOffset) {
    Converter conv(env);

    wgpu::Buffer b{};
    uint64_t o = 0;

    if (!conv(b, indirectBuffer) ||  //
        !conv(o, indirectOffset)) {
        return;
    }
    enc_.DrawIndirect(b, o);
}

void GPURenderPassEncoder::drawIndexedIndirect(
    Napi::Env env,
    interop::Interface<interop::GPUBuffer> indirectBuffer,
    interop::GPUSize64 indirectOffset) {
    Converter conv(env);

    wgpu::Buffer b{};
    uint64_t o = 0;

    if (!conv(b, indirectBuffer) ||  //
        !conv(o, indirectOffset)) {
        return;
    }
    enc_.DrawIndexedIndirect(b, o);
}

void GPURenderPassEncoder::multiDrawIndirect(
    Napi::Env env,
    interop::Interface<interop::GPUBuffer> indirectBuffer,
    interop::GPUSize64 indirectOffset,
    interop::GPUSize32 maxDrawCount,
    std::optional<interop::Interface<interop::GPUBuffer>> countBuffer,
    interop::GPUSize64 countBufferOffset) {
    Converter conv(env);

    wgpu::Buffer ib{};
    wgpu::Buffer cb{};
    uint64_t io = 0;
    uint64_t co = 0;

    if (!conv(ib, indirectBuffer) ||  //
        !conv(io, indirectOffset) ||  //
        !conv(cb, countBuffer) ||     //
        !conv(co, countBufferOffset)) {
        return;
    }

    enc_.MultiDrawIndirect(ib, io, maxDrawCount, cb, co);
}

void GPURenderPassEncoder::multiDrawIndexedIndirect(
    Napi::Env env,
    interop::Interface<interop::GPUBuffer> indirectBuffer,
    interop::GPUSize64 indirectOffset,
    interop::GPUSize32 maxDrawCount,
    std::optional<interop::Interface<interop::GPUBuffer>> drawCountBuffer,
    interop::GPUSize64 drawCountBufferOffset) {
    Converter conv(env);

    wgpu::Buffer ib{};
    wgpu::Buffer cb{};
    uint64_t io = 0;
    uint64_t co = 0;

    if (!conv(ib, indirectBuffer) ||   //
        !conv(io, indirectOffset) ||   //
        !conv(cb, drawCountBuffer) ||  //
        !conv(co, drawCountBufferOffset)) {
        return;
    }

    enc_.MultiDrawIndexedIndirect(ib, io, maxDrawCount, cb, co);
}

std::string GPURenderPassEncoder::getLabel(Napi::Env) {
    return label_;
}

void GPURenderPassEncoder::setLabel(Napi::Env, std::string value) {
    enc_.SetLabel(std::string_view(value));
    label_ = value;
}

}  // namespace wgpu::binding