// Copyright 2025 The Dawn & Tint Authors
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#include "dawn/native/webgpu/PhysicalDeviceWGPU.h"

#include <string>

#include "dawn/common/StringViewUtils.h"
#include "dawn/native/ChainUtils.h"
#include "dawn/native/Features_autogen.h"
#include "dawn/native/Instance.h"
#include "dawn/native/webgpu/BackendWGPU.h"

namespace dawn::native::webgpu {

Ref<PhysicalDevice> PhysicalDevice::Create(Backend* backend, WGPUAdapter innerAdapter) {
    auto physicalDevice = AcquireRef(new PhysicalDevice(backend, innerAdapter));
    MaybeError err = physicalDevice->Initialize();
    DAWN_CHECK(err.IsSuccess());
    return physicalDevice;
}

PhysicalDevice::PhysicalDevice(Backend* backend, WGPUAdapter innerAdapter)
    : PhysicalDeviceBase(wgpu::BackendType::WebGPU),
      mBackend(backend),
      mInnerAdapter(innerAdapter) {
    WGPUAdapterInfo info = {};
    WGPUStatus status = GetFunctions().adapterGetInfo(mInnerAdapter, &info);
    DAWN_ASSERT(status == WGPUStatus_Success);
    DAWN_ASSERT(info.backendType != WGPUBackendType_WebGPU);

    mVendorName = ToString(info.vendor);
    mArchitectureName = ToString(info.architecture);
    mVendorId = info.vendorID;
    mDeviceId = info.deviceID;
    mName = absl::StrFormat("WebGPU backend on %s", FromAPI(info.backendType));
    mAdapterType = FromAPI(info.adapterType);
    mDriverDescription = ToString(info.description);
    mSubgroupMinSize = info.subgroupMinSize;
    mSubgroupMaxSize = info.subgroupMaxSize;

    GetFunctions().adapterInfoFreeMembers(info);
}

PhysicalDevice::~PhysicalDevice() {
    if (mInnerAdapter) {
        GetFunctions().adapterRelease(mInnerAdapter);
        mInnerAdapter = nullptr;
    }
}

const DawnProcTable& PhysicalDevice::GetFunctions() const {
    return mBackend->GetFunctions();
}

bool PhysicalDevice::SupportsExternalImages() const {
    return false;
}

bool PhysicalDevice::SupportsFeatureLevel(wgpu::FeatureLevel featureLevel,
                                          InstanceBase* instance) const {
    return true;
}

ResultOrError<PhysicalDeviceSurfaceCapabilities> PhysicalDevice::GetSurfaceCapabilities(
    InstanceBase* instance,
    const Surface* surface) const {
    // TODO(crbug.com/413053623): revisit when implementing Surface.
    PhysicalDeviceSurfaceCapabilities capabilities;
    capabilities.usages = wgpu::TextureUsage::RenderAttachment;
    capabilities.formats = {wgpu::TextureFormat::BGRA8Unorm};
    capabilities.presentModes = {wgpu::PresentMode::Fifo};
    capabilities.alphaModes = {wgpu::CompositeAlphaMode::Opaque};
    return capabilities;
}

MaybeError PhysicalDevice::InitializeImpl() {
    return {};
}

void PhysicalDevice::InitializeSupportedFeaturesImpl() {
    DAWN_ASSERT(kEnumCount<Feature> == static_cast<uint32_t>(kFeatureNameAndInfoList.size()));
    for (uint32_t f = 0; f < kEnumCount<Feature>; f++) {
        Feature feature = static_cast<Feature>(f);
        WGPUFeatureName apiFeature = ToAPI(ToAPI(feature));
        if (GetFunctions().adapterHasFeature(mInnerAdapter, apiFeature)) {
            EnableFeature(feature);
        }
    }
}

MaybeError PhysicalDevice::InitializeSupportedLimitsImpl(CombinedLimits* limits) {
    WGPUStatus status = GetFunctions().adapterGetLimits(mInnerAdapter, ToAPI(&limits->v1));
    if (status != WGPUStatus_Success) {
        return DAWN_INTERNAL_ERROR("Fail to get inner adapter limits");
    }
    return {};
}

void PhysicalDevice::SetupBackendAdapterToggles(dawn::platform::Platform* platform,
                                                TogglesState* adapterToggles) const {}

void PhysicalDevice::SetupBackendDeviceToggles(dawn::platform::Platform* platform,
                                               TogglesState* deviceToggles) const {}

ResultOrError<Ref<DeviceBase>> PhysicalDevice::CreateDeviceImpl(
    AdapterBase* adapter,
    const UnpackedPtr<DeviceDescriptor>& descriptor,
    const TogglesState& deviceToggles,
    Ref<DeviceBase::DeviceLostEvent>&& lostEvent) {
    DAWN_UNREACHABLE();
}

void PhysicalDevice::PopulateBackendProperties(UnpackedPtr<AdapterInfo>& info) const {
    if (auto* subgroupProperties = info.Get<AdapterPropertiesSubgroups>()) {
        subgroupProperties->subgroupMinSize = mSubgroupMinSize;
        subgroupProperties->subgroupMaxSize = mSubgroupMaxSize;
    }

    // TODO(crbug.com/413053623): Populate other AdapterInfo Chained extensions when necessary.
}

FeatureValidationResult PhysicalDevice::ValidateFeatureSupportedWithTogglesImpl(
    wgpu::FeatureName feature,
    const TogglesState& toggles) const {
    return {};
}

}  // namespace dawn::native::webgpu