/*
 * 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 "fatal_types.hpp"
#include "fatal_private.hpp"
#include "fatal_user.hpp"
#include "fatal_config.hpp"
#include "fatal_repair.hpp"
#include "fatal_font.hpp"

extern "C" {
    extern u32 __start__;

    u32 __nx_applet_type = AppletType_None;

    #define INNER_HEAP_SIZE 0x2A0000
    size_t nx_inner_heap_size = INNER_HEAP_SIZE;
    char   nx_inner_heap[INNER_HEAP_SIZE];

    u32 __nx_nv_transfermem_size = 0x40000;
    ViLayerFlags __nx_vi_stray_layer_flags = (ViLayerFlags)0;

    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);
    u64 __stratosphere_title_id = TitleId_Fatal;
    void __libstratosphere_exception_handler(AtmosphereFatalErrorContext *ctx);
}

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;
}

void __appInit(void) {
    Result rc;

    SetFirmwareVersionForLibnx();

    DoWithSmSession([&]() {
        rc = setInitialize();
        if (R_FAILED(rc)) {
            std::abort();
        }

        rc = setsysInitialize();
        if (R_FAILED(rc)) {
            std::abort();
        }

        rc = pminfoInitialize();
        if (R_FAILED(rc)) {
            std::abort();
        }

        rc = i2cInitialize();
        if (R_FAILED(rc)) {
            std::abort();
        }

        rc = bpcInitialize();
        if (R_FAILED(rc)) {
            std::abort();
        }

        if (GetRuntimeFirmwareVersion() >= FirmwareVersion_800) {
            rc = clkrstInitialize();
            if (R_FAILED(rc)) {
                std::abort();
            }
        } else {
            rc = pcvInitialize();
            if (R_FAILED(rc)) {
                std::abort();
            }
        }

        rc = lblInitialize();
        if (R_FAILED(rc)) {
            std::abort();
        }

        rc = psmInitialize();
        if (R_FAILED(rc)) {
            std::abort();
        }

        rc = spsmInitialize();
        if (R_FAILED(rc)) {
            std::abort();
        }

        rc = plInitialize();
        if (R_FAILED(rc)) {
            std::abort();
        }

        rc = gpioInitialize();
        if (R_FAILED(rc)) {
            std::abort();
        }

        rc = fsInitialize();
        if (R_FAILED(rc)) {
            std::abort();
        }
    });

    rc = fsdevMountSdmc();
    if (R_FAILED(rc)) {
        std::abort();
    }

    /* fatal cannot throw fatal, so don't do: CheckAtmosphereVersion(CURRENT_ATMOSPHERE_VERSION); */
}

void __appExit(void) {
    /* Cleanup services. */
    fsdevUnmountAll();
    fsExit();
    plExit();
    gpioExit();
    spsmExit();
    psmExit();
    lblExit();
    if (GetRuntimeFirmwareVersion() >= FirmwareVersion_800) {
        clkrstExit();
    } else {
        pcvExit();
    }
    bpcExit();
    i2cExit();
    pminfoExit();
    setsysExit();
    setExit();
}

int main(int argc, char **argv)
{
    /* Load settings from set:sys. */
    InitializeFatalConfig();

    /* Load shared font. */
    if (R_FAILED(FontManager::InitializeSharedFont())) {
        std::abort();
    }

    /* Check whether we should throw fatal due to repair process. */
    CheckRepairStatus();

    /* TODO: What's a good timeout value to use here? */
    auto server_manager = new WaitableManager(1);

    /* Create services. */
    server_manager->AddWaitable(new ServiceServer<PrivateService>("fatal:p", 4));
    server_manager->AddWaitable(new ServiceServer<UserService>("fatal:u", 4));
    server_manager->AddWaitable(GetFatalSettingsEvent());

    /* Loop forever, servicing our services. */
    server_manager->Process();

    delete server_manager;

    return 0;
}