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

#include <array>
#include "common/logging/log.h"
#include "core/hle/ipc_helpers.h"
#include "core/hle/service/acc/acc.h"
#include "core/hle/service/acc/acc_aa.h"
#include "core/hle/service/acc/acc_su.h"
#include "core/hle/service/acc/acc_u0.h"
#include "core/hle/service/acc/acc_u1.h"
#include "core/settings.h"

namespace Service::Account {

// TODO: RE this structure
struct UserData {
    INSERT_PADDING_WORDS(1);
    u32 icon_id;
    u8 bg_color_id;
    INSERT_PADDING_BYTES(0x7);
    INSERT_PADDING_BYTES(0x10);
    INSERT_PADDING_BYTES(0x60);
};
static_assert(sizeof(UserData) == 0x80, "UserData structure has incorrect size");

struct ProfileBase {
    u128 user_id;
    u64 timestamp;
    std::array<u8, 0x20> username;
};
static_assert(sizeof(ProfileBase) == 0x38, "ProfileBase structure has incorrect size");

// TODO(ogniK): Generate a real user id based on username, md5(username) maybe?
static constexpr u128 DEFAULT_USER_ID{1ull, 0ull};

class IProfile final : public ServiceFramework<IProfile> {
public:
    explicit IProfile(u128 user_id) : ServiceFramework("IProfile"), user_id(user_id) {
        static const FunctionInfo functions[] = {
            {0, &IProfile::Get, "Get"},
            {1, &IProfile::GetBase, "GetBase"},
            {10, nullptr, "GetImageSize"},
            {11, nullptr, "LoadImage"},
        };
        RegisterHandlers(functions);
    }

private:
    void Get(Kernel::HLERequestContext& ctx) {
        LOG_WARNING(Service_ACC, "(STUBBED) called");
        ProfileBase profile_base{};
        profile_base.user_id = user_id;
        if (Settings::values.username.size() > profile_base.username.size()) {
            std::copy_n(Settings::values.username.begin(), profile_base.username.size(),
                        profile_base.username.begin());
        } else {
            std::copy(Settings::values.username.begin(), Settings::values.username.end(),
                      profile_base.username.begin());
        }

        IPC::ResponseBuilder rb{ctx, 16};
        rb.Push(RESULT_SUCCESS);
        rb.PushRaw(profile_base);
    }

    void GetBase(Kernel::HLERequestContext& ctx) {
        LOG_WARNING(Service_ACC, "(STUBBED) called");

        // TODO(Subv): Retrieve this information from somewhere.
        ProfileBase profile_base{};
        profile_base.user_id = user_id;
        if (Settings::values.username.size() > profile_base.username.size()) {
            std::copy_n(Settings::values.username.begin(), profile_base.username.size(),
                        profile_base.username.begin());
        } else {
            std::copy(Settings::values.username.begin(), Settings::values.username.end(),
                      profile_base.username.begin());
        }
        IPC::ResponseBuilder rb{ctx, 16};
        rb.Push(RESULT_SUCCESS);
        rb.PushRaw(profile_base);
    }

    u128 user_id; ///< The user id this profile refers to.
};

class IManagerForApplication final : public ServiceFramework<IManagerForApplication> {
public:
    IManagerForApplication() : ServiceFramework("IManagerForApplication") {
        static const FunctionInfo functions[] = {
            {0, &IManagerForApplication::CheckAvailability, "CheckAvailability"},
            {1, &IManagerForApplication::GetAccountId, "GetAccountId"},
            {2, nullptr, "EnsureIdTokenCacheAsync"},
            {3, nullptr, "LoadIdTokenCache"},
            {130, nullptr, "GetNintendoAccountUserResourceCacheForApplication"},
            {150, nullptr, "CreateAuthorizationRequest"},
            {160, nullptr, "StoreOpenContext"},
        };
        RegisterHandlers(functions);
    }

private:
    void CheckAvailability(Kernel::HLERequestContext& ctx) {
        LOG_WARNING(Service_ACC, "(STUBBED) called");
        IPC::ResponseBuilder rb{ctx, 3};
        rb.Push(RESULT_SUCCESS);
        rb.Push(false); // TODO: Check when this is supposed to return true and when not
    }

    void GetAccountId(Kernel::HLERequestContext& ctx) {
        LOG_WARNING(Service_ACC, "(STUBBED) called");
        // TODO(Subv): Find out what this actually does and implement it. Stub it as an error for
        // now since we do not implement NNID. Returning a bogus id here will cause games to send
        // invalid IPC requests after ListOpenUsers is called.
        IPC::ResponseBuilder rb{ctx, 2};
        rb.Push(ResultCode(-1));
    }
};

void Module::Interface::GetUserCount(Kernel::HLERequestContext& ctx) {
    LOG_WARNING(Service_ACC, "(STUBBED) called");
    IPC::ResponseBuilder rb{ctx, 3};
    rb.Push(RESULT_SUCCESS);
    rb.Push<u32>(1);
}

void Module::Interface::GetUserExistence(Kernel::HLERequestContext& ctx) {
    LOG_WARNING(Service_ACC, "(STUBBED) called");
    IPC::ResponseBuilder rb{ctx, 3};
    rb.Push(RESULT_SUCCESS);
    rb.Push(true); // TODO: Check when this is supposed to return true and when not
}

void Module::Interface::ListAllUsers(Kernel::HLERequestContext& ctx) {
    LOG_WARNING(Service_ACC, "(STUBBED) called");
    // TODO(Subv): There is only one user for now.
    const std::vector<u128> user_ids = {DEFAULT_USER_ID};
    ctx.WriteBuffer(user_ids);
    IPC::ResponseBuilder rb{ctx, 2};
    rb.Push(RESULT_SUCCESS);
}

void Module::Interface::ListOpenUsers(Kernel::HLERequestContext& ctx) {
    LOG_WARNING(Service_ACC, "(STUBBED) called");
    // TODO(Subv): There is only one user for now.
    const std::vector<u128> user_ids = {DEFAULT_USER_ID};
    ctx.WriteBuffer(user_ids);
    IPC::ResponseBuilder rb{ctx, 2};
    rb.Push(RESULT_SUCCESS);
}

void Module::Interface::GetProfile(Kernel::HLERequestContext& ctx) {
    IPC::RequestParser rp{ctx};
    u128 user_id = rp.PopRaw<u128>();
    IPC::ResponseBuilder rb{ctx, 2, 0, 1};
    rb.Push(RESULT_SUCCESS);
    rb.PushIpcInterface<IProfile>(user_id);
    LOG_DEBUG(Service_ACC, "called user_id=0x{:016X}{:016X}", user_id[1], user_id[0]);
}

void Module::Interface::InitializeApplicationInfo(Kernel::HLERequestContext& ctx) {
    LOG_WARNING(Service_ACC, "(STUBBED) called");
    IPC::ResponseBuilder rb{ctx, 2};
    rb.Push(RESULT_SUCCESS);
}

void Module::Interface::GetBaasAccountManagerForApplication(Kernel::HLERequestContext& ctx) {
    IPC::ResponseBuilder rb{ctx, 2, 0, 1};
    rb.Push(RESULT_SUCCESS);
    rb.PushIpcInterface<IManagerForApplication>();
    LOG_DEBUG(Service_ACC, "called");
}

void Module::Interface::GetLastOpenedUser(Kernel::HLERequestContext& ctx) {
    LOG_WARNING(Service_ACC, "(STUBBED) called");
    IPC::ResponseBuilder rb{ctx, 6};
    rb.Push(RESULT_SUCCESS);
    rb.PushRaw(DEFAULT_USER_ID);
}

Module::Interface::Interface(std::shared_ptr<Module> module, const char* name)
    : ServiceFramework(name), module(std::move(module)) {}

void InstallInterfaces(SM::ServiceManager& service_manager) {
    auto module = std::make_shared<Module>();
    std::make_shared<ACC_AA>(module)->InstallAsService(service_manager);
    std::make_shared<ACC_SU>(module)->InstallAsService(service_manager);
    std::make_shared<ACC_U0>(module)->InstallAsService(service_manager);
    std::make_shared<ACC_U1>(module)->InstallAsService(service_manager);
}

} // namespace Service::Account