/*
 * Copyright (C) 2018 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "config.h"
#include "WebGPUDevice.h"

#if ENABLE(WEBGPU)

#include "DOMWindow.h"
#include "Document.h"
#include "EventNames.h"
#include "Exception.h"
#include "GPUBindGroup.h"
#include "GPUBindGroupBinding.h"
#include "GPUBindGroupDescriptor.h"
#include "GPUBindGroupLayoutDescriptor.h"
#include "GPUBufferBinding.h"
#include "GPUBufferDescriptor.h"
#include "GPUCommandBuffer.h"
#include "GPUComputePipeline.h"
#include "GPUComputePipelineDescriptor.h"
#include "GPUProgrammableStageDescriptor.h"
#include "GPURenderPipeline.h"
#include "GPURenderPipelineDescriptor.h"
#include "GPUSampler.h"
#include "GPUSamplerDescriptor.h"
#include "GPUShaderModuleDescriptor.h"
#include "GPUTextureDescriptor.h"
#include "GPUUncapturedErrorEvent.h"
#include "InspectorInstrumentation.h"
#include "JSDOMConvertBufferSource.h"
#include "JSGPUOutOfMemoryError.h"
#include "JSGPUValidationError.h"
#include "JSWebGPUBuffer.h"
#include "Logging.h"
#include "WebGPUBindGroup.h"
#include "WebGPUBindGroupBinding.h"
#include "WebGPUBindGroupDescriptor.h"
#include "WebGPUBindGroupLayout.h"
#include "WebGPUBufferBinding.h"
#include "WebGPUCommandEncoder.h"
#include "WebGPUComputePipeline.h"
#include "WebGPUComputePipelineDescriptor.h"
#include "WebGPUPipeline.h"
#include "WebGPUPipelineLayout.h"
#include "WebGPUPipelineLayoutDescriptor.h"
#include "WebGPUProgrammableStageDescriptor.h"
#include "WebGPUQueue.h"
#include "WebGPURenderPipeline.h"
#include "WebGPURenderPipelineDescriptor.h"
#include "WebGPUSampler.h"
#include "WebGPUShaderModule.h"
#include "WebGPUShaderModuleDescriptor.h"
#include "WebGPUSwapChain.h"
#include "WebGPUTexture.h"
#include <JavaScriptCore/ConsoleMessage.h>
#include <memory>
#include <wtf/HashSet.h>
#include <wtf/IsoMallocInlines.h>
#include <wtf/Lock.h>
#include <wtf/MainThread.h>
#include <wtf/NeverDestroyed.h>
#include <wtf/Optional.h>
#include <wtf/Ref.h>
#include <wtf/RefPtr.h>
#include <wtf/Variant.h>
#include <wtf/Vector.h>
#include <wtf/text/WTFString.h>

namespace WebCore {

WTF_MAKE_ISO_ALLOCATED_IMPL(WebGPUDevice);

RefPtr<WebGPUDevice> WebGPUDevice::tryCreate(ScriptExecutionContext& context, Ref<const WebGPUAdapter>&& adapter)
{
    if (auto device = GPUDevice::tryCreate(adapter->options()))
        return adoptRef(new WebGPUDevice(context, WTFMove(adapter), device.releaseNonNull()));
    return nullptr;
}

HashSet<WebGPUDevice*>& WebGPUDevice::instances(const LockHolder&)
{
    static NeverDestroyed<HashSet<WebGPUDevice*>> instances;
    return instances;
}

Lock& WebGPUDevice::instancesMutex()
{
    static LazyNeverDestroyed<Lock> mutex;
    static std::once_flag initializeMutex;
    std::call_once(initializeMutex, [] {
        mutex.construct();
    });
    return mutex.get();
}

WebGPUDevice::WebGPUDevice(ScriptExecutionContext& context, Ref<const WebGPUAdapter>&& adapter, Ref<GPUDevice>&& device)
    : m_scriptExecutionContext(context)
    , m_adapter(WTFMove(adapter))
    , m_device(WTFMove(device))
    , m_errorScopes(GPUErrorScopes::create([this, weakThis = makeWeakPtr(this)] (GPUError&& error) {
        if (weakThis)
            dispatchUncapturedError(WTFMove(error));
    }))
{
    ASSERT(m_scriptExecutionContext.isDocument());

    {
        LockHolder lock(instancesMutex());
        instances(lock).add(this);
    }
}

WebGPUDevice::~WebGPUDevice()
{
    InspectorInstrumentation::willDestroyWebGPUDevice(*this);

    {
        LockHolder lock(WebGPUPipeline::instancesMutex());
        for (auto& entry : WebGPUPipeline::instances(lock)) {
            if (entry.value == this) {
                // Don't remove any WebGPUPipeline from the instances list, as they may still exist.
                // Only remove the association with a WebGPU device.
                entry.value = nullptr;
            }
        }
    }

    {
        LockHolder lock(instancesMutex());
        ASSERT(instances(lock).contains(this));
        instances(lock).remove(this);
    }
}

Ref<WebGPUBuffer> WebGPUDevice::createBuffer(const GPUBufferDescriptor& descriptor) const
{
    m_errorScopes->setErrorPrefix("GPUDevice.createBuffer(): ");

    auto buffer = m_device->tryCreateBuffer(descriptor, GPUBufferMappedOption::NotMapped, m_errorScopes);
    return WebGPUBuffer::create(WTFMove(buffer), m_errorScopes);
}

Vector<JSC::JSValue> WebGPUDevice::createBufferMapped(JSC::ExecState& state, const GPUBufferDescriptor& descriptor) const
{
    m_errorScopes->setErrorPrefix("GPUDevice.createBufferMapped(): ");

    JSC::JSValue wrappedArrayBuffer = JSC::jsNull();

    auto buffer = m_device->tryCreateBuffer(descriptor, GPUBufferMappedOption::IsMapped, m_errorScopes);
    if (buffer) {
        auto arrayBuffer = buffer->mapOnCreation();
        wrappedArrayBuffer = toJS(&state, JSC::jsCast<JSDOMGlobalObject*>(state.lexicalGlobalObject()), arrayBuffer);
    }

    auto webBuffer = WebGPUBuffer::create(WTFMove(buffer), m_errorScopes);
    auto wrappedWebBuffer = toJS(&state, JSC::jsCast<JSDOMGlobalObject*>(state.lexicalGlobalObject()), webBuffer);

    return { wrappedWebBuffer, wrappedArrayBuffer };
}

Ref<WebGPUTexture> WebGPUDevice::createTexture(const GPUTextureDescriptor& descriptor) const
{
    auto texture = m_device->tryCreateTexture(descriptor);
    return WebGPUTexture::create(WTFMove(texture));
}

Ref<WebGPUSampler> WebGPUDevice::createSampler(const GPUSamplerDescriptor& descriptor) const
{
    auto sampler = m_device->tryCreateSampler(descriptor);
    return WebGPUSampler::create(WTFMove(sampler));
}

Ref<WebGPUBindGroupLayout> WebGPUDevice::createBindGroupLayout(const GPUBindGroupLayoutDescriptor& descriptor) const
{
    auto layout = m_device->tryCreateBindGroupLayout(descriptor);
    return WebGPUBindGroupLayout::create(WTFMove(layout));
}

Ref<WebGPUPipelineLayout> WebGPUDevice::createPipelineLayout(const WebGPUPipelineLayoutDescriptor& descriptor) const
{
    auto gpuDescriptor = descriptor.tryCreateGPUPipelineLayoutDescriptor();
    if (!gpuDescriptor)
        return WebGPUPipelineLayout::create(nullptr);
    
    auto layout = m_device->createPipelineLayout(WTFMove(*gpuDescriptor));
    return WebGPUPipelineLayout::create(WTFMove(layout));
}

Ref<WebGPUBindGroup> WebGPUDevice::createBindGroup(const WebGPUBindGroupDescriptor& descriptor) const
{
    auto gpuDescriptor = descriptor.tryCreateGPUBindGroupDescriptor();
    if (!gpuDescriptor)
        return WebGPUBindGroup::create(nullptr);

    auto bindGroup = m_device->tryCreateBindGroup(*gpuDescriptor, m_errorScopes);
    return WebGPUBindGroup::create(WTFMove(bindGroup));
}

Ref<WebGPUShaderModule> WebGPUDevice::createShaderModule(const WebGPUShaderModuleDescriptor& descriptor) const
{
    // FIXME: What can be validated here?
    auto module = m_device->tryCreateShaderModule(GPUShaderModuleDescriptor { descriptor.code });
    return WebGPUShaderModule::create(WTFMove(module), descriptor.code);
}

Ref<WebGPURenderPipeline> WebGPUDevice::createRenderPipeline(const WebGPURenderPipelineDescriptor& descriptor)
{
    m_errorScopes->setErrorPrefix("GPUDevice.createRenderPipeline(): ");

    auto gpuDescriptor = descriptor.tryCreateGPURenderPipelineDescriptor(m_errorScopes);
    if (!gpuDescriptor)
        return WebGPURenderPipeline::create(*this, nullptr, m_errorScopes, WTF::nullopt, WTF::nullopt);

    auto gpuPipeline = m_device->tryCreateRenderPipeline(*gpuDescriptor, m_errorScopes);

    WebGPUPipeline::ShaderData vertexShader = { descriptor.vertexStage.module, descriptor.vertexStage.entryPoint };

    Optional<WebGPUPipeline::ShaderData> fragmentShader;
    if (descriptor.fragmentStage)
        fragmentShader = { { descriptor.fragmentStage.value().module, descriptor.fragmentStage.value().entryPoint } };

    auto webGPUPipeline = WebGPURenderPipeline::create(*this, WTFMove(gpuPipeline), m_errorScopes, vertexShader, fragmentShader);
    if (webGPUPipeline->isValid())
        InspectorInstrumentation::didCreateWebGPUPipeline(*this, webGPUPipeline.get());
    return webGPUPipeline;
}

Ref<WebGPUComputePipeline> WebGPUDevice::createComputePipeline(const WebGPUComputePipelineDescriptor& descriptor)
{
    m_errorScopes->setErrorPrefix("GPUDevice.createComputePipeline(): ");

    auto gpuDescriptor = descriptor.tryCreateGPUComputePipelineDescriptor(m_errorScopes);
    if (!gpuDescriptor)
        return WebGPUComputePipeline::create(*this, nullptr, m_errorScopes, WTF::nullopt);

    auto gpuPipeline = m_device->tryCreateComputePipeline(*gpuDescriptor, m_errorScopes);

    WebGPUPipeline::ShaderData computeShader = { descriptor.computeStage.module, descriptor.computeStage.entryPoint };

    auto webGPUPipeline = WebGPUComputePipeline::create(*this, WTFMove(gpuPipeline), m_errorScopes, computeShader);
    if (webGPUPipeline->isValid())
        InspectorInstrumentation::didCreateWebGPUPipeline(*this, webGPUPipeline.get());
    return webGPUPipeline;
}

Ref<WebGPUCommandEncoder> WebGPUDevice::createCommandEncoder() const
{
    auto commandBuffer = m_device->tryCreateCommandBuffer();
    return WebGPUCommandEncoder::create(WTFMove(commandBuffer));
}

Ref<WebGPUQueue> WebGPUDevice::getQueue() const
{
    if (!m_queue)
        m_queue = WebGPUQueue::create(m_device->tryGetQueue());

    return makeRef(*m_queue.get());
}

void WebGPUDevice::popErrorScope(ErrorPromise&& promise)
{
    String failMessage;
    Optional<GPUError> error = m_errorScopes->popErrorScope(failMessage);
    if (failMessage.isEmpty())
        promise.resolve(error);
    else
        promise.reject(Exception { OperationError, "GPUDevice::popErrorScope(): " + failMessage });
}

// Errors reported via the validation error event should also appear in the console as warnings.
static void printValidationErrorToConsole(GPUError& error, ScriptExecutionContext& context)
{
    if (!WTF::holds_alternative<RefPtr<GPUValidationError>>(error))
        return;

    auto validationError = WTF::get<RefPtr<GPUValidationError>>(error);
    if (!validationError)
        return;

    auto message = validationError->message();
    auto consoleMessage = makeUnique<Inspector::ConsoleMessage>(MessageSource::Rendering, MessageType::Log, MessageLevel::Warning, message);

    downcast<Document>(context).addConsoleMessage(WTFMove(consoleMessage));
}

void WebGPUDevice::dispatchUncapturedError(GPUError&& error)
{
    printValidationErrorToConsole(error, m_scriptExecutionContext);

    callOnMainThread([error = WTFMove(error), this, protectedThis = makeRef(*this)] () mutable {
        dispatchEvent(GPUUncapturedErrorEvent::create(eventNames().uncapturederrorEvent, WTFMove(error)));
    });
}

} // namespace WebCore

#endif // ENABLE(WEBGPU)
