// 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/core.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"

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

namespace HLE {
namespace Applets {

// This data was obtained by writing the returned buffer in AppletManager::GlanceParameter of the
// LLEd Mii picker of version system version 11.8.0 to a file
static const std::array<u8, 132> mii = {
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0x03, 0x00, 0x10,
    0x30, 0xd2, 0x85, 0xb6, 0xb3, 0x00, 0xc8, 0x85, 0x0a, 0x98, 0x39, 0x1e, 0xe4, 0x40, 0xf4,
    0x07, 0xb7, 0x37, 0x10, 0x00, 0x00, 0xa6, 0x00, 0x43, 0x00, 0x69, 0x00, 0x74, 0x00, 0x72,
    0x00, 0x61, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x40,
    0x00, 0x00, 0x21, 0x01, 0x02, 0x68, 0x44, 0x18, 0x26, 0x34, 0x46, 0x14, 0x81, 0x12, 0x17,
    0x68, 0x0d, 0x00, 0x00, 0x29, 0x00, 0x52, 0x48, 0x50, 0x66, 0x00, 0x6c, 0x00, 0x54, 0x00,
    0x6f, 0x00, 0x62, 0x00, 0x69, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x05, 0x6c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};

ResultCode MiiSelector::ReceiveParameter(const Service::APT::MessageParameter& parameter) {
    if (parameter.signal != Service::APT::SignalType::Request) {
        LOG_ERROR(Service_APT, "unsupported signal {}", static_cast<u32>(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 = Core::System::GetInstance().Kernel().CreateSharedMemoryForApplet(
        heap_memory, 0, capture_info.size, MemoryPermission::ReadWrite, MemoryPermission::ReadWrite,
        "MiiSelector Memory");

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

    SendParameter(result);
    return RESULT_SUCCESS;
}

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

    // 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
    MiiResult result;
    std::memcpy(&result, mii.data(), mii.size());

    // 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 = Service::APT::SignalType::WakeupByExit;
    message.destination_id = Service::APT::AppletId::Application;
    message.sender_id = id;
    SendParameter(message);

    is_running = false;
    return RESULT_SUCCESS;
}

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