// Copyright 2016 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.

#include <cstring>
#include <string>
#include "common/assert.h"
#include "common/logging/log.h"
#include "common/string_util.h"
#include "core/hle/applets/mii_selector.h"
#include "core/hle/kernel/kernel.h"
#include "core/hle/kernel/shared_memory.h"
#include "core/hle/result.h"
#include "video_core/video_core.h"

////////////////////////////////////////////////////////////////////////////////////////////////////

namespace HLE {
namespace Applets {

ResultCode MiiSelector::ReceiveParameter(const Service::APT::MessageParameter& parameter) {
    if (parameter.signal != static_cast<u32>(Service::APT::SignalType::Request)) {
        LOG_ERROR(Service_APT, "unsupported signal %u", parameter.signal);
        UNIMPLEMENTED();
        // TODO(Subv): Find the right error code
        return ResultCode(-1);
    }

    // The LibAppJustStarted message contains a buffer with the size of the framebuffer shared
    // memory.
    // Create the SharedMemory that will hold the framebuffer data
    Service::APT::CaptureBufferInfo capture_info;
    ASSERT(sizeof(capture_info) == parameter.buffer.size());

    memcpy(&capture_info, parameter.buffer.data(), sizeof(capture_info));

    using Kernel::MemoryPermission;
    // Allocate a heap block of the required size for this applet.
    heap_memory = std::make_shared<std::vector<u8>>(capture_info.size);
    // Create a SharedMemory that directly points to this heap block.
    framebuffer_memory = Kernel::SharedMemory::CreateForApplet(
        heap_memory, 0, heap_memory->size(), MemoryPermission::ReadWrite,
        MemoryPermission::ReadWrite, "MiiSelector Memory");

    // Send the response message with the newly created SharedMemory
    Service::APT::MessageParameter result;
    result.signal = static_cast<u32>(Service::APT::SignalType::Response);
    result.buffer.clear();
    result.destination_id = static_cast<u32>(Service::APT::AppletId::Application);
    result.sender_id = static_cast<u32>(id);
    result.object = framebuffer_memory;

    Service::APT::SendParameter(result);
    return RESULT_SUCCESS;
}

ResultCode MiiSelector::StartImpl(const Service::APT::AppletStartupParameter& parameter) {
    is_running = true;

    // TODO(Subv): Set the expected fields in the response buffer before resending it to the
    // application.
    // TODO(Subv): Reverse the parameter format for the Mii Selector

    memcpy(&config, parameter.buffer.data(), parameter.buffer.size());

    // TODO(Subv): Find more about this structure, result code 0 is enough to let most games
    // continue.
    MiiResult result;
    memset(&result, 0, sizeof(result));
    result.result_code = 0;

    // Let the application know that we're closing
    Service::APT::MessageParameter message;
    message.buffer.resize(sizeof(MiiResult));
    std::memcpy(message.buffer.data(), &result, message.buffer.size());
    message.signal = static_cast<u32>(Service::APT::SignalType::WakeupByExit);
    message.destination_id = static_cast<u32>(Service::APT::AppletId::Application);
    message.sender_id = static_cast<u32>(id);
    Service::APT::SendParameter(message);

    is_running = false;
    return RESULT_SUCCESS;
}

void MiiSelector::Update() {}
}
} // namespace
