/*
 * Copyright (c) 2018-2020 Atmosphère-NX
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
#include <stratosphere.hpp>
#include "sf_hipc_mitm_query_api.hpp"

#define AMS_SF_HIPC_IMPL_I_MITM_QUERY_SERVICE_INTERFACE_INFO(C, H) \
    AMS_SF_METHOD_INFO(C, H, 65000, void, ShouldMitm, (sf::Out<bool> out, const sm::MitmProcessInfo &client_info), (out, client_info))

AMS_SF_DEFINE_INTERFACE(ams::sf::hipc::impl, IMitmQueryService, AMS_SF_HIPC_IMPL_I_MITM_QUERY_SERVICE_INTERFACE_INFO)

namespace ams::sf::hipc::impl {

    namespace {

        class MitmQueryService {
            private:
                ServerManagerBase::MitmQueryFunction query_function;
            public:
                MitmQueryService(ServerManagerBase::MitmQueryFunction qf) : query_function(qf) { /* ... */ }

                void ShouldMitm(sf::Out<bool> out, const sm::MitmProcessInfo &client_info) {
                    *out = this->query_function(client_info);
                }
        };
        static_assert(IsIMitmQueryService<MitmQueryService>);

        /* Globals. */
        constinit os::SdkMutex g_query_server_lock;
        constinit bool g_constructed_server = false;
        constinit bool g_registered_any = false;

        void QueryServerProcessThreadMain(void *query_server) {
            reinterpret_cast<ServerManagerBase *>(query_server)->LoopProcess();
        }

        alignas(os::ThreadStackAlignment) constinit u8 g_server_process_thread_stack[16_KB];
        constinit os::ThreadType g_query_server_process_thread;

        constexpr size_t MaxServers = 0;
        TYPED_STORAGE(sf::hipc::ServerManager<MaxServers>) g_query_server_storage;

    }

    void RegisterMitmQueryHandle(Handle query_handle, ServerManagerBase::MitmQueryFunction query_func) {
        std::scoped_lock lk(g_query_server_lock);

        if (AMS_UNLIKELY(!g_constructed_server)) {
            new (GetPointer(g_query_server_storage)) sf::hipc::ServerManager<MaxServers>();
            g_constructed_server = true;
        }

        /* TODO: Better object factory? */
        R_ABORT_UNLESS(GetPointer(g_query_server_storage)->RegisterSession(query_handle, cmif::ServiceObjectHolder(sf::CreateSharedObjectEmplaced<IMitmQueryService, MitmQueryService>(query_func))));

        if (AMS_UNLIKELY(!g_registered_any)) {
            R_ABORT_UNLESS(os::CreateThread(std::addressof(g_query_server_process_thread), &QueryServerProcessThreadMain, GetPointer(g_query_server_storage), g_server_process_thread_stack, sizeof(g_server_process_thread_stack), AMS_GET_SYSTEM_THREAD_PRIORITY(mitm_sf, QueryServerProcessThread)));
            os::SetThreadNamePointer(std::addressof(g_query_server_process_thread), AMS_GET_SYSTEM_THREAD_NAME(mitm_sf, QueryServerProcessThread));
            os::StartThread(std::addressof(g_query_server_process_thread));
            g_registered_any = true;
        }
    }

}