/*
 * Copyright (c) 2018-2019 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 <cstdlib>
#include <cstdint>
#include <cstring>
#include <malloc.h>

#include <switch.h>
#include <atmosphere.h>
#include <stratosphere.hpp>
#include <stratosphere/ncm.hpp>
#include <stratosphere/ldr.hpp>

#include "ldr_loader_service.hpp"

extern "C" {
    extern u32 __start__;

    u32 __nx_applet_type = AppletType_None;
    u32 __nx_fs_num_sessions = 1;
    u32 __nx_fsdev_direntry_cache_size = 1;

    #define INNER_HEAP_SIZE 0x4000
    size_t nx_inner_heap_size = INNER_HEAP_SIZE;
    char   nx_inner_heap[INNER_HEAP_SIZE];

    void __libnx_initheap(void);
    void __appInit(void);
    void __appExit(void);

    /* Exception handling. */
    alignas(16) u8 __nx_exception_stack[0x1000];
    u64 __nx_exception_stack_size = sizeof(__nx_exception_stack);
    void __libnx_exception_handler(ThreadExceptionDump *ctx);
    void __libstratosphere_exception_handler(AtmosphereFatalErrorContext *ctx);
}

sts::ncm::TitleId __stratosphere_title_id = sts::ncm::TitleId::Loader;

void __libnx_exception_handler(ThreadExceptionDump *ctx) {
    StratosphereCrashHandler(ctx);
}


void __libnx_initheap(void) {
	void*  addr = nx_inner_heap;
	size_t size = nx_inner_heap_size;

	/* Newlib */
	extern char* fake_heap_start;
	extern char* fake_heap_end;

	fake_heap_start = (char*)addr;
	fake_heap_end   = (char*)addr + size;
}

using namespace sts;

void __appInit(void) {
    hos::SetVersionForLibnx();

    /* Initialize services we need. */
    DoWithSmSession([&]() {
        R_ASSERT(fsInitialize());
        R_ASSERT(lrInitialize());
        R_ASSERT(fsldrInitialize());
    });

    CheckAtmosphereVersion(CURRENT_ATMOSPHERE_VERSION);
}

void __appExit(void) {
    /* Cleanup services. */
    fsdevUnmountAll();
    fsldrExit();
    lrExit();
    fsExit();
}

namespace {

    struct ServerOptions {
        static constexpr size_t PointerBufferSize = 0x400;
        static constexpr size_t MaxDomains = 0;
        static constexpr size_t MaxDomainObjects = 0;
    };

    constexpr sm::ServiceName ProcessManagerServiceName = sm::ServiceName::Encode("ldr:pm");
    constexpr size_t          ProcessManagerMaxSessions = 1;

    constexpr sm::ServiceName ShellServiceName = sm::ServiceName::Encode("ldr:shel");
    constexpr size_t          ShellMaxSessions = 3;

    constexpr sm::ServiceName DebugMonitorServiceName = sm::ServiceName::Encode("ldr:dmnt");
    constexpr size_t          DebugMonitorMaxSessions = 3;

    /* ldr:pm, ldr:shel, ldr:dmnt. */
    constexpr size_t NumServers  = 3;
    constexpr size_t MaxSessions = ProcessManagerMaxSessions + ShellMaxSessions + DebugMonitorMaxSessions + 1;
    sf::hipc::ServerManager<NumServers, ServerOptions, MaxSessions> g_server_manager;

}

int main(int argc, char **argv)
{
    /* Add services to manager. */
    R_ASSERT((g_server_manager.RegisterServer<ldr::pm::ProcessManagerInterface>(ProcessManagerServiceName, ProcessManagerMaxSessions)));
    R_ASSERT((g_server_manager.RegisterServer<ldr::shell::ShellInterface>(ShellServiceName, ShellMaxSessions)));
    R_ASSERT((g_server_manager.RegisterServer<ldr::dmnt::DebugMonitorInterface>(DebugMonitorServiceName, DebugMonitorMaxSessions)));

    /* Loop forever, servicing our services. */
    g_server_manager.LoopProcess();

	return 0;
}