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// Copyright 2018 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.

#pragma once

#include <array>
#include <vector>

#include "core/hle/service/kernel_helpers.h"
#include "core/hle/service/mii/mii_manager.h"
#include "core/hle/service/service.h"

namespace Kernel {
class KEvent;
class KReadableEvent;
} // namespace Kernel

namespace Core::HID {
enum class NpadIdType : u32;
} // namespace Core::HID

namespace Service::NFP {

enum class ServiceType : u32 {
    User,
    Debug,
    System,
};

enum class State : u32 {
    NonInitialized,
    Initialized,
};

enum class DeviceState : u32 {
    Initialized,
    SearchingForTag,
    TagFound,
    TagRemoved,
    TagMounted,
    Unaviable,
    Finalized,
};

enum class ModelType : u32 {
    Amiibo,
};

enum class MountTarget : u32 {
    Rom,
    Ram,
    All,
};

struct TagInfo {
    std::array<u8, 10> uuid;
    u8 uuid_length;
    INSERT_PADDING_BYTES(0x15);
    u32 protocol;
    u32 tag_type;
    INSERT_PADDING_BYTES(0x30);
};
static_assert(sizeof(TagInfo) == 0x58, "TagInfo is an invalid size");

struct CommonInfo {
    u16 last_write_year;
    u8 last_write_month;
    u8 last_write_day;
    u16 write_counter;
    u16 version;
    u32 application_area_size;
    INSERT_PADDING_BYTES(0x34);
};
static_assert(sizeof(CommonInfo) == 0x40, "CommonInfo is an invalid size");

struct ModelInfo {
    u16 character_id;
    u8 character_variant;
    u8 figure_type;
    u16 model_number;
    u8 series;
    INSERT_PADDING_BYTES(0x39);
};
static_assert(sizeof(ModelInfo) == 0x40, "ModelInfo is an invalid size");

struct RegisterInfo {
    Service::Mii::MiiInfo mii_char_info;
    u16 first_write_year;
    u8 first_write_month;
    u8 first_write_day;
    std::array<u8, 11> amiibo_name;
    u8 unknown;
    INSERT_PADDING_BYTES(0x98);
};
static_assert(sizeof(RegisterInfo) == 0x100, "RegisterInfo is an invalid size");

class Module final {
public:
    class Interface : public ServiceFramework<Interface> {
    public:
        explicit Interface(std::shared_ptr<Module> module_, Core::System& system_,
                           const char* name);
        ~Interface() override;

        struct AmiiboFile {
            std::array<u8, 10> uuid;
            INSERT_PADDING_BYTES(0x4); // Compability container
            INSERT_PADDING_BYTES(0x46);
            ModelInfo model_info;
        };
        static_assert(sizeof(AmiiboFile) == 0x94, "AmiiboFile is an invalid size");

        void CreateUserInterface(Kernel::HLERequestContext& ctx);
        bool LoadAmiibo(const std::vector<u8>& buffer);
        void CloseAmiibo();

        void Initialize();
        void Finalize();

        ResultCode StartDetection();
        ResultCode StopDetection();
        ResultCode Mount();
        ResultCode Unmount();

        ResultCode GetTagInfo(TagInfo& tag_info) const;
        ResultCode GetCommonInfo(CommonInfo& common_info) const;
        ResultCode GetModelInfo(ModelInfo& model_info) const;
        ResultCode GetRegisterInfo(RegisterInfo& register_info) const;

        ResultCode OpenApplicationArea(u32 access_id);
        ResultCode GetApplicationArea(std::vector<u8>& data) const;
        ResultCode SetApplicationArea(const std::vector<u8>& data);
        ResultCode CreateApplicationArea(u32 access_id, const std::vector<u8>& data);

        u64 GetHandle() const;
        DeviceState GetCurrentState() const;
        Core::HID::NpadIdType GetNpadId() const;

        Kernel::KReadableEvent& GetActivateEvent() const;
        Kernel::KReadableEvent& GetDeactivateEvent() const;

    protected:
        std::shared_ptr<Module> module;

    private:
        const Core::HID::NpadIdType npad_id;

        DeviceState device_state{DeviceState::Unaviable};
        KernelHelpers::ServiceContext service_context;
        Kernel::KEvent* activate_event;
        Kernel::KEvent* deactivate_event;
        AmiiboFile amiibo{};
        u16 write_counter{};
        bool is_application_area_initialized{};
        u32 application_area_id;
        std::vector<u8> application_area_data;
    };
};

class IUser final : public ServiceFramework<IUser> {
public:
    explicit IUser(Module::Interface& nfp_interface_, Core::System& system_);

private:
    void Initialize(Kernel::HLERequestContext& ctx);
    void Finalize(Kernel::HLERequestContext& ctx);
    void ListDevices(Kernel::HLERequestContext& ctx);
    void StartDetection(Kernel::HLERequestContext& ctx);
    void StopDetection(Kernel::HLERequestContext& ctx);
    void Mount(Kernel::HLERequestContext& ctx);
    void Unmount(Kernel::HLERequestContext& ctx);
    void OpenApplicationArea(Kernel::HLERequestContext& ctx);
    void GetApplicationArea(Kernel::HLERequestContext& ctx);
    void SetApplicationArea(Kernel::HLERequestContext& ctx);
    void CreateApplicationArea(Kernel::HLERequestContext& ctx);
    void GetTagInfo(Kernel::HLERequestContext& ctx);
    void GetRegisterInfo(Kernel::HLERequestContext& ctx);
    void GetCommonInfo(Kernel::HLERequestContext& ctx);
    void GetModelInfo(Kernel::HLERequestContext& ctx);
    void AttachActivateEvent(Kernel::HLERequestContext& ctx);
    void AttachDeactivateEvent(Kernel::HLERequestContext& ctx);
    void GetState(Kernel::HLERequestContext& ctx);
    void GetDeviceState(Kernel::HLERequestContext& ctx);
    void GetNpadId(Kernel::HLERequestContext& ctx);
    void GetApplicationAreaSize(Kernel::HLERequestContext& ctx);
    void AttachAvailabilityChangeEvent(Kernel::HLERequestContext& ctx);

    KernelHelpers::ServiceContext service_context;

    // TODO(german77): We should have a vector of interfaces
    Module::Interface& nfp_interface;

    State state{State::NonInitialized};
    Kernel::KEvent* availability_change_event;
};

void InstallInterfaces(SM::ServiceManager& service_manager, Core::System& system);

} // namespace Service::NFP