/*
 * 86Box    A hypervisor and IBM PC system emulator that specializes in
 *          running old operating systems and software designed for IBM
 *          PC systems and compatibles from 1981 through fairly recent
 *          system designs based on the PCI bus.
 *
 *          This file is part of the 86Box distribution.
 *
 *          Common platform functions.
 *
 * Authors: Joakim L. Gilje <jgilje@jgilje.net>
 *          Cacodemon345
 *          Teemu Korhonen
 *
 *          Copyright 2021 Joakim L. Gilje
 *          Copyright 2021-2022 Cacodemon345
 *          Copyright 2021-2022 Teemu Korhonen
 */
#ifdef __HAIKU__
#    include <OS.h>
#endif

#include <cstdio>

#include <mutex>
#include <thread>
#include <memory>
#include <algorithm>
#include <map>

#include <QDebug>

#include <QApplication>
#include <QClipboard>
#include <QDir>
#include <QFileInfo>
#include <QMimeData>
#include <QTemporaryFile>
#include <QStandardPaths>
#include <QCoreApplication>
#include <QDateTime>
#include <QLocalSocket>
#include <QTimer>
#include <QProcess>
#include <QRegularExpression>
#include <QKeySequence>

#include <QLibrary>
#include <QElapsedTimer>

#include <QScreen>

#include "qt_rendererstack.hpp"
#include "qt_mainwindow.hpp"
#include "qt_preferences.hpp"
#include "qt_util.hpp"

#ifndef Q_OS_WINDOWS
#    include <signal.h>
#endif

#ifdef Q_OS_UNIX
#    include <pthread.h>
#    include <sys/mman.h>
#    include <fcntl.h>
#    include <unistd.h>
#    include <sys/ioctl.h>
#    ifdef Q_OS_LINUX
#        include <linux/fs.h>
#    endif
#    ifdef Q_OS_MACOS
#        include <sys/disk.h>
#    endif
#    if defined(Q_OS_FREEBSD) || defined(Q_OS_OPENBSD) || defined(Q_OS_NETBSD)
#        include <sys/disk.h>
#        include <sys/disklabel.h>
#    endif
#endif

#ifdef Q_OS_WINDOWS
#    ifndef NOMINMAX
#        define NOMINMAX
#    endif
#    include <windows.h>
#    include <winioctl.h>
#endif

#include <sys/stat.h>

#ifdef Q_OS_OPENBSD
#    include <pthread_np.h>
#endif

#if 0
static QByteArray buf;
#endif
extern QElapsedTimer elapsed_timer;
extern MainWindow   *main_window;
QElapsedTimer        elapsed_timer;

static std::atomic_int      blitmx_contention = 0;
static std::recursive_mutex blitmx;

class CharPointer {
public:
    CharPointer(char *buf, int size)
        : b(buf)
        , s(size)
    {
    }
    CharPointer &operator=(const QByteArray &ba)
    {
        if (s > 0) {
            // If the size is known, copy up to s - 1 bytes
            // and null-terminate the string.
            strncpy(b, ba.data(), s - 1);
            b[s - 1] = 0;
        } else if (ba.size() > 0) {
            // If the size is unknown, copy the whole QByteArray
            strcpy(b, ba.data());
        }
        return *this;
    }

private:
    char *b;
    int   s;
};

extern "C" {
#ifdef Q_OS_WINDOWS
#    include <86box/win.h>
#else
#    include <strings.h>
#endif
#include <86box/86box.h>
#include <86box/device.h>
#include <86box/gameport.h>
#include <86box/timer.h>
#include <86box/nvr.h>
#include <86box/path.h>
#include <86box/plat_dynld.h>
#include <86box/mem.h>
#include <86box/rom.h>
#include <86box/config.h>
#include <86box/hdd.h>
#include <86box/ui.h>
#ifdef DISCORD
#    include <86box/discord.h>
#endif

#include "../cpu/cpu.h"
#include <86box/plat.h>

volatile int cpu_thread_run  = 1;
int          mouse_capture   = 0;
int          fixed_size_x    = 640;
int          fixed_size_y    = 480;
int          rctrl_is_lalt   = 0;
int          update_icons    = 1;
int          kbd_req_capture = 0;
int          hide_status_bar = 0;
int          hide_tool_bar   = 0;

int
stricmp(const char *s1, const char *s2)
{
#ifdef Q_OS_WINDOWS
    return _stricmp(s1, s2);
#else
    return strcasecmp(s1, s2);
#endif
}

int
strnicmp(const char *s1, const char *s2, size_t n)
{
#ifdef Q_OS_WINDOWS
    return _strnicmp(s1, s2, n);
#else
    return strncasecmp(s1, s2, n);
#endif
}

void
do_start(void)
{
    //
}

void
do_stop(void)
{
    cpu_thread_run = 0;
#if 0
    main_window->close();
#endif
}

extern bool acp_utf8;
void
plat_get_exe_name(char *s, int size)
{
#ifdef Q_OS_WINDOWS
    wchar_t *temp;

    if (acp_utf8)
        GetModuleFileNameA(NULL, s, size);
    else {
        temp = (wchar_t *) calloc(size, sizeof(wchar_t));
        GetModuleFileNameW(NULL, temp, size);
        c16stombs(s, (uint16_t *) temp, size);
        free(temp);
    }
#else
    QByteArray exepath_temp = QCoreApplication::applicationDirPath().toLocal8Bit();

    memcpy(s, exepath_temp.data(), std::min((qsizetype) exepath_temp.size(), (qsizetype) size));

    path_slash(s);
#endif
}

uint32_t
plat_get_ticks(void)
{
    return elapsed_timer.elapsed();
}

uint64_t
plat_timer_read(void)
{
    return elapsed_timer.elapsed();
}

FILE *
plat_fopen(const char *path, const char *mode)
{
#if defined(Q_OS_MACOS) or defined(Q_OS_LINUX)
    QFileInfo fi(path);
    QString   filename = (fi.isRelative() && !fi.filePath().isEmpty()) ? usr_path + fi.filePath() : fi.filePath();
    return fopen(filename.toUtf8().constData(), mode);
#else
    return fopen(QString::fromUtf8(path).toLocal8Bit(), mode);
#endif
}

FILE *
plat_fopen64(const char *path, const char *mode)
{
#if defined(Q_OS_MACOS) or defined(Q_OS_LINUX)
    QFileInfo fi(path);
    QString   filename = (fi.isRelative() && !fi.filePath().isEmpty()) ? usr_path + fi.filePath() : fi.filePath();
    return fopen(filename.toUtf8().constData(), mode);
#else
    return fopen(QString::fromUtf8(path).toLocal8Bit(), mode);
#endif
}

int
plat_dir_create(char *path)
{
    return QDir().mkdir(path) ? 0 : -1;
}

int
plat_dir_check(char *path)
{
    QFileInfo fi(path);
    return fi.isDir() ? 1 : 0;
}

int
plat_file_check(const char *path)
{
#ifdef _WIN32
    auto data = QString::fromUtf8(path).toStdWString();
    auto res  = GetFileAttributesW(data.c_str());
    return (res != INVALID_FILE_ATTRIBUTES) && !(res & FILE_ATTRIBUTE_DIRECTORY);
#else
    struct stat stats;
    if (stat(path, &stats) < 0)
        return 0;
    return !S_ISDIR(stats.st_mode);
#endif
}

int
plat_is_block_device(const char *path)
{
#ifdef Q_OS_WINDOWS
    /* On Windows, check if path looks like a physical disk (e.g., \\.\PhysicalDrive0) */
    if (path == nullptr)
        return 0;
    QString p = QString::fromUtf8(path);
    if (p.startsWith("\\\\.\\PhysicalDrive", Qt::CaseInsensitive) ||
        p.startsWith("\\\\.\\Harddisk", Qt::CaseInsensitive) ||
        p.startsWith("\\\\?\\", Qt::CaseInsensitive))
        return 1;
    return 0;
#else
    struct stat stats;
    if (stat(path, &stats) < 0)
        return 0;
#if defined(Q_OS_FREEBSD) || defined(Q_OS_OPENBSD) || defined(Q_OS_NETBSD)
    /* BSD systems use character devices for disk access, not block devices */
    return S_ISCHR(stats.st_mode) ? 1 : 0;
#else
    return S_ISBLK(stats.st_mode) ? 1 : 0;
#endif
#endif
}

int64_t
plat_get_block_device_size(const char *path)
{
#ifdef Q_OS_WINDOWS
    HANDLE hDevice;
    DWORD  bytesReturned;
    GET_LENGTH_INFORMATION lengthInfo;

    auto widePath = QString::fromUtf8(path).toStdWString();
    hDevice = CreateFileW(widePath.c_str(), GENERIC_READ,
                          FILE_SHARE_READ | FILE_SHARE_WRITE,
                          NULL, OPEN_EXISTING, 0, NULL);
    if (hDevice == INVALID_HANDLE_VALUE)
        return -1;

    if (!DeviceIoControl(hDevice, IOCTL_DISK_GET_LENGTH_INFO,
                         NULL, 0, &lengthInfo, sizeof(lengthInfo),
                         &bytesReturned, NULL)) {
        CloseHandle(hDevice);
        return -1;
    }

    CloseHandle(hDevice);
    return (int64_t) lengthInfo.Length.QuadPart;

#elif defined(Q_OS_LINUX)
    int fd = open(path, O_RDONLY);
    if (fd < 0)
        return -1;

    uint64_t size = 0;
    if (ioctl(fd, BLKGETSIZE64, &size) < 0) {
        close(fd);
        return -1;
    }
    close(fd);
    return (int64_t) size;

#elif defined(Q_OS_MACOS)
    int fd = open(path, O_RDONLY);
    if (fd < 0)
        return -1;

    uint64_t block_count = 0;
    uint32_t block_size = 0;

    if (ioctl(fd, DKIOCGETBLOCKCOUNT, &block_count) < 0) {
        close(fd);
        return -1;
    }
    if (ioctl(fd, DKIOCGETBLOCKSIZE, &block_size) < 0) {
        close(fd);
        return -1;
    }

    close(fd);
    return (int64_t)(block_count * block_size);

#elif defined(Q_OS_FREEBSD) || defined(Q_OS_OPENBSD) || defined(Q_OS_NETBSD)
    int fd = open(path, O_RDONLY);
    if (fd < 0)
        return -1;

    off_t size = 0;
    if (ioctl(fd, DIOCGMEDIASIZE, &size) < 0) {
        close(fd);
        return -1;
    }
    close(fd);
    return (int64_t) size;

#else
    /* Unsupported platform */
    (void) path;
    return -1;
#endif
}

int
plat_getcwd(char *bufp, int max)
{
#ifdef __APPLE__
    /* Working directory for .app bundles is undefined. */
#    ifdef USE_EXE_PATH
    strncpy(bufp, exe_path, max);
#    else
    CharPointer(bufp, max) = QDir::homePath().toUtf8();
    path_append_filename(bufp, bufp, "Library/" EMU_NAME);
#    endif
#else
    CharPointer(bufp, max) = QDir::currentPath().toUtf8();
#endif
    return 0;
}

char *
path_get_basename(const char *path)
{
    QFileInfo fi(path);
    return fi.fileName().toUtf8().data();
}

void
path_get_dirname(char *dest, const char *path)
{
    QFileInfo fi(path);
    CharPointer(dest, -1) = fi.dir().path().toUtf8();
}

char *
path_get_extension(char *s)
{
    auto len = strlen(s);
    auto idx = QByteArray::fromRawData(s, len).lastIndexOf('.');
    if (idx >= 0) {
        return s + idx + 1;
    }
    return s + len;
}

char *
path_get_filename(char *s)
{
#ifdef Q_OS_WINDOWS
    int c = strlen(s) - 1;

    while (c > 0) {
        if (s[c] == '/' || s[c] == '\\')
            return (&s[c + 1]);
        c--;
    }

    return s;
#else
    auto idx = QByteArray::fromRawData(s, strlen(s)).lastIndexOf(QDir::separator().toLatin1());
    if (idx >= 0) {
        return s + idx + 1;
    }
    return s;
#endif
}

int
path_abs(char *path)
{
#ifdef Q_OS_WINDOWS
    if ((path[1] == ':') || (path[0] == '\\') || (path[0] == '/') || (strstr(path, "ioctl://") == path))
        return 1;

    return 0;
#else
    return path[0] == '/';
#endif
}

void
path_normalize(char *path)
{
#ifdef Q_OS_WINDOWS
    if (plat_is_block_device(path))
        return;
    if (strstr(path, "ioctl://") != path) {
        while (*path++ != 0) {
            if (*path == '\\')
                *path = '/';
        }
    } else
        path[8] = path[9] = path[11] = '\\';
#endif
}

void
path_slash(char *path)
{
    auto len       = strlen(path);
    auto separator = '/';
    if (path[len - 1] != separator) {
        path[len]     = separator;
        path[len + 1] = 0;
    }
    path_normalize(path);
}

const char *
path_get_slash(char *path)
{
    return QString(path).endsWith("/") ? "" : "/";
}

void
path_append_filename(char *dest, const char *s1, const char *s2)
{
    size_t dest_size = 260;
    size_t len;

    if (!dest || !s1 || !s2)
        return;

    if (dest != s1)
        snprintf(dest, dest_size, "%s", s1);

    len = strlen(dest);

    if (len > 0 && dest[len - 1] != '/' && dest[len - 1] != '\\') {
        if (len + 1 < dest_size) {
            dest[len++] = '/';
            dest[len]   = '\0';
        }
    }

    if (len < dest_size - 1) {
        strncat(dest, s2, dest_size - len - 1);
    }
}

void
plat_tempfile(char *bufp, char *prefix, char *suffix)
{
    QString name;

    if (prefix != nullptr) {
        name.append(QString("%1-").arg(prefix));
    }

    name.append(QDateTime::currentDateTime().toString("yyyyMMdd-hhmmss-zzz"));
    if (suffix)
        name.append(suffix);
    strcpy(bufp, name.toUtf8().data());
}

void
plat_remove(char *path)
{
    QFile(path).remove();
}

void *
plat_mmap(size_t size, uint8_t executable)
{
#if defined Q_OS_WINDOWS
    return VirtualAlloc(NULL, size, MEM_COMMIT, executable ? PAGE_EXECUTE_READWRITE : PAGE_READWRITE);
#elif defined Q_OS_UNIX
#    if defined Q_OS_DARWIN && defined MAP_JIT
    void *ret = mmap(0, size, PROT_READ | PROT_WRITE | (executable ? PROT_EXEC : 0), MAP_ANON | MAP_PRIVATE | (executable ? MAP_JIT : 0), -1, 0);
#    elif defined(PROT_MPROTECT)
    void *ret = mmap(0, size, PROT_MPROTECT(PROT_READ | PROT_WRITE | (executable ? PROT_EXEC : 0)), MAP_ANON | MAP_PRIVATE, -1, 0);
    if (ret)
        mprotect(ret, size, PROT_READ | PROT_WRITE | (executable ? PROT_EXEC : 0));
#    else
    void *ret = mmap(0, size, PROT_READ | PROT_WRITE | (executable ? PROT_EXEC : 0), MAP_ANON | MAP_PRIVATE, -1, 0);
#    endif
    return (ret == MAP_FAILED) ? nullptr : ret;
#endif
}

void
plat_munmap(void *ptr, size_t size)
{
#if defined Q_OS_WINDOWS
    VirtualFree(ptr, 0, MEM_RELEASE);
#else
    munmap(ptr, size);
#endif
}

extern bool cpu_thread_running;

#ifdef Q_OS_WINDOWS
/* SetThreadDescription was added in 14393 and SetProcessInformation in 8. Revisit if we ever start requiring 10. */
static void *kernel32_handle                                                                                                                                                = NULL;
static HRESULT(WINAPI *pSetThreadDescription)(HANDLE hThread, PCWSTR lpThreadDescription)                                                                                   = NULL;
static HRESULT(WINAPI *pSetProcessInformation)(HANDLE hProcess, PROCESS_INFORMATION_CLASS ProcessInformationClass, LPVOID ProcessInformation, DWORD ProcessInformationSize) = NULL;
static dllimp_t kernel32_imports[]                                                                                                                                          = {
    // clang-format off
    { "SetThreadDescription",  &pSetThreadDescription  },
    { "SetProcessInformation", &pSetProcessInformation },
    { NULL,                    NULL                    }
    // clang-format on
};

static void
enter_pause(void)
{
    PROCESS_POWER_THROTTLING_STATE state {};
    state.Version     = PROCESS_POWER_THROTTLING_CURRENT_VERSION;
    state.ControlMask = PROCESS_POWER_THROTTLING_EXECUTION_SPEED | PROCESS_POWER_THROTTLING_IGNORE_TIMER_RESOLUTION;
    state.StateMask   = PROCESS_POWER_THROTTLING_EXECUTION_SPEED | PROCESS_POWER_THROTTLING_IGNORE_TIMER_RESOLUTION;

    if (!kernel32_handle) {
        kernel32_handle = dynld_module("kernel32.dll", kernel32_imports);
        if (!kernel32_handle) {
            kernel32_handle        = kernel32_imports; /* store dummy pointer to avoid trying again */
            pSetThreadDescription  = NULL;
            pSetProcessInformation = NULL;
        }
    }

    if (pSetProcessInformation) {
        pSetProcessInformation(GetCurrentProcess(), ProcessPowerThrottling, (LPVOID) &state, sizeof(state));
    }
}

void
exit_pause(void)
{
    PROCESS_POWER_THROTTLING_STATE state {};
    state.Version     = PROCESS_POWER_THROTTLING_CURRENT_VERSION;
    state.ControlMask = PROCESS_POWER_THROTTLING_EXECUTION_SPEED | PROCESS_POWER_THROTTLING_IGNORE_TIMER_RESOLUTION;
    state.StateMask   = 0;

    if (!kernel32_handle) {
        kernel32_handle = dynld_module("kernel32.dll", kernel32_imports);
        if (!kernel32_handle) {
            kernel32_handle        = kernel32_imports; /* store dummy pointer to avoid trying again */
            pSetThreadDescription  = NULL;
            pSetProcessInformation = NULL;
        }
    }

    if (pSetProcessInformation) {
        pSetProcessInformation(GetCurrentProcess(), ProcessPowerThrottling, (LPVOID) &state, sizeof(state));
    }
}
#endif

void
plat_pause(int p)
{
    static wchar_t oldtitle[512];
    wchar_t        title[1024];
    wchar_t        paused_msg[512];

    if (!cpu_thread_running && p == 1) {
        p = 2;
    }

    if ((!!p) == dopause) {
        QTimer::singleShot(0, main_window, &MainWindow::updateUiPauseState);

#ifdef Q_OS_WINDOWS
        if (source_hwnd)
            PostMessage((HWND) (uintptr_t) source_hwnd, WM_SENDSTATUS, (WPARAM) !!p, (LPARAM) (HWND) main_window->winId());
#endif
        return;
    }

    if ((p == 0) && (time_sync & TIME_SYNC_ENABLED))
        nvr_time_sync();

#ifdef Q_OS_WINDOWS
    if (p) {
        enter_pause();
    } else {
        exit_pause();
    }
#endif

    do_pause(p);
    if (p) {
        if (mouse_capture)
            plat_mouse_capture(0);

        wcsncpy(oldtitle, ui_window_title(NULL), sizeof_w(oldtitle) - 1);
        wcscpy(title, oldtitle);
        paused_msg[QObject::tr(" - PAUSED").toWCharArray(paused_msg)] = 0;
        wcscat(title, paused_msg);
        ui_window_title(title);
    } else {
        ui_window_title(oldtitle);
    }

#ifdef DISCORD
    discord_update_activity(dopause);
#endif

    QTimer::singleShot(0, main_window, &MainWindow::updateUiPauseState);

#ifdef Q_OS_WINDOWS
    if (source_hwnd)
        PostMessage((HWND) (uintptr_t) source_hwnd, WM_SENDSTATUS, (WPARAM) !!p, (LPARAM) (HWND) main_window->winId());
#endif
}

void
plat_power_off(void)
{
    plat_mouse_capture(0);
    confirm_exit_cmdl = 0;
    hdd_image_sync_all();
    nvr_save();

    /* Deduct a sufficiently large number of cycles that no instructions will
       run before the main thread is terminated */
    cycles -= 99999999;

    cpu_thread_run = 0;
    QTimer::singleShot(0, (const QWidget *) main_window, &QMainWindow::close);
}

/* Converts the language code string to a numeric language ID */
int
plat_language_code(char *langcode)
{
    return Preferences::languageCodeToId(QString(langcode));
}

/* Converts the numeric language ID to a language code string */
void
plat_language_code_r(int id, char *outbuf, int len)
{
    qstrncpy(outbuf, Preferences::languageIdToCode(id).toUtf8().constData(), len);
    return;
}

#ifndef Q_OS_WINDOWS
void *
dynld_module(const char *name, dllimp_t *table)
{
    QString     libraryName = name;
    QFileInfo   fi(libraryName);
    QStringList removeSuffixes = { "dll", "dylib", "so" };
    if (removeSuffixes.contains(fi.suffix())) {
        libraryName = fi.completeBaseName();
    }

    auto lib = std::unique_ptr<QLibrary>(new QLibrary(libraryName));
    if (lib->load()) {
        for (auto imp = table; imp->name != nullptr; imp++) {
            auto ptr = lib->resolve(imp->name);
            if (ptr == nullptr) {
                return nullptr;
            }
            auto imp_ptr = reinterpret_cast<void **>(imp->func);
            *imp_ptr     = reinterpret_cast<void *>(ptr);
        }
    } else {
        return nullptr;
    }

    return lib.release();
}

void
dynld_close(void *handle)
{
    delete reinterpret_cast<QLibrary *>(handle);
}
#endif

void
startblit()
{
    blitmx_contention++;
    if (blitmx.try_lock()) {
        return;
    }

    blitmx.lock();
}

void
endblit()
{
    blitmx_contention--;
    blitmx.unlock();
    if (blitmx_contention > 0) {
        // a deadlock has been observed on linux when toggling via video_toggle_option
        // because the mutex is typically unfair on linux
        // => sleep if there's contention
        std::this_thread::sleep_for(std::chrono::milliseconds(1));
    }
}
} /*extern "C" */

#ifdef Q_OS_WINDOWS
size_t
mbstoc16s(uint16_t dst[], const char src[], int len)
{
    if (src == NULL)
        return 0;
    if (len < 0)
        return 0;

    size_t ret = MultiByteToWideChar(CP_UTF8, 0, src, -1, reinterpret_cast<LPWSTR>(dst), dst == NULL ? 0 : len);

    if (!ret) {
        return -1;
    }

    return ret;
}

size_t
c16stombs(char dst[], const uint16_t src[], int len)
{
    if (src == NULL)
        return 0;
    if (len < 0)
        return 0;

    size_t ret = WideCharToMultiByte(CP_UTF8, 0, reinterpret_cast<LPCWCH>(src), -1, dst, dst == NULL ? 0 : len, NULL, NULL);

    if (!ret) {
        return -1;
    }

    return ret;
}
#endif

#ifdef _WIN32
#    define LIB_NAME_GS   "gsdll64.dll"
#    define LIB_NAME_GPCL "gpcl6dll64.dll"
#    define LIB_NAME_PCAP "Npcap"
#else
#    define LIB_NAME_GS   "libgs"
#    define LIB_NAME_GPCL "libgpcl6"
#    define LIB_NAME_PCAP "libpcap"
#endif

QMap<int, std::wstring> Preferences::translatedstrings;

void
Preferences::reloadStrings()
{
    translatedstrings.clear();
    translatedstrings[STRING_MOUSE_CAPTURE]             = QCoreApplication::translate("", "Click to capture mouse").toStdWString();
    translatedstrings[STRING_MOUSE_RELEASE]             = QCoreApplication::translate("", "Press %1 to release mouse").arg(QKeySequence(acc_keys[FindAccelerator("release_mouse")].seq, QKeySequence::PortableText).toString(QKeySequence::NativeText)).toStdWString();
    translatedstrings[STRING_MOUSE_RELEASE_MMB]         = QCoreApplication::translate("", "Press %1 or middle button to release mouse").arg(QKeySequence(acc_keys[FindAccelerator("release_mouse")].seq, QKeySequence::PortableText).toString(QKeySequence::NativeText)).toStdWString();
    translatedstrings[STRING_INVALID_CONFIG]            = QCoreApplication::translate("", "Invalid configuration").toStdWString();
    translatedstrings[STRING_NO_ST506_ESDI_CDROM]       = QCoreApplication::translate("", "MFM/RLL or ESDI CD-ROM drives never existed").toStdWString();
    translatedstrings[STRING_PCAP_ERROR_NO_DEVICES]     = QCoreApplication::translate("", "No PCap devices found").toStdWString();
    translatedstrings[STRING_PCAP_ERROR_INVALID_DEVICE] = QCoreApplication::translate("", "Invalid PCap device").toStdWString();
    translatedstrings[STRING_PCAP_ERROR_DESC]           = QCoreApplication::translate("", "Make sure %1 is installed and that you are on a %1-compatible network connection.").arg(LIB_NAME_PCAP).toStdWString();
    translatedstrings[STRING_GHOSTSCRIPT_ERROR_TITLE]   = QCoreApplication::translate("", "Unable to initialize Ghostscript").toStdWString();
    translatedstrings[STRING_GHOSTSCRIPT_ERROR_DESC]    = QCoreApplication::translate("", "%1 is required for automatic conversion of PostScript files to PDF.\n\nAny documents sent to the generic PostScript printer will be saved as PostScript (.ps) files.").arg(LIB_NAME_GS).toStdWString();
    translatedstrings[STRING_GHOSTPCL_ERROR_TITLE]      = QCoreApplication::translate("", "Unable to initialize GhostPCL").toStdWString();
    translatedstrings[STRING_GHOSTPCL_ERROR_DESC]       = QCoreApplication::translate("", "%1 is required for automatic conversion of PCL files to PDF.\n\nAny documents sent to the generic PCL printer will be saved as Printer Command Language (.pcl) files.").arg(LIB_NAME_GPCL).toStdWString();
    translatedstrings[STRING_HW_NOT_AVAILABLE_MACHINE]  = QCoreApplication::translate("", "Machine \"%hs\" is not available due to missing ROMs in the roms/machines directory. Switching to an available machine.").toStdWString();
    translatedstrings[STRING_HW_NOT_AVAILABLE_VIDEO]    = QCoreApplication::translate("", "Video card \"%hs\" is not available due to missing ROMs in the roms/video directory. Switching to an available video card.").toStdWString();
    translatedstrings[STRING_HW_NOT_AVAILABLE_VIDEO2]   = QCoreApplication::translate("", "Video card #2 \"%hs\" is not available due to missing ROMs in the roms/video directory. Disabling the second video card.").toStdWString();
    translatedstrings[STRING_HW_NOT_AVAILABLE_DEVICE]   = QCoreApplication::translate("", "Device \"%hs\" is not available due to missing ROMs. Ignoring the device.").toStdWString();
    translatedstrings[STRING_HW_NOT_AVAILABLE_TITLE]    = QCoreApplication::translate("", "Hardware not available").toStdWString();
    translatedstrings[STRING_MONITOR_SLEEP]             = QCoreApplication::translate("", "Monitor in sleep mode").toStdWString();
    translatedstrings[STRING_NET_ERROR]                 = QCoreApplication::translate("", "Failed to initialize network driver").toStdWString();
    translatedstrings[STRING_NET_ERROR_DESC]            = QCoreApplication::translate("", "The network configuration will be switched to the null driver").toStdWString();
    translatedstrings[STRING_ESCP_ERROR_TITLE]          = QCoreApplication::translate("", "Unable to find Dot-Matrix fonts").toStdWString();
    translatedstrings[STRING_ESCP_ERROR_DESC]           = QCoreApplication::translate("", "TrueType fonts in the \"roms/printer/fonts\" directory are required for the emulation of the Generic ESC/P 2 Dot-Matrix Printer.").toStdWString();
    translatedstrings[STRING_EDID_TOO_LARGE]            = QCoreApplication::translate("", "EDID file \"%ls\" is too large.").toStdWString();
}

wchar_t *
plat_get_string(int i)
{
    if (Preferences::translatedstrings.empty())
        Preferences::reloadStrings();
    return Preferences::translatedstrings[i].data();
}

int
plat_chdir(char *path)
{
    return QDir::setCurrent(QString(path)) ? 0 : -1;
}

#ifdef _WIN32
void plat_get_system_directory(char *outbuf)
{
    wchar_t wc[512];
    GetSystemWindowsDirectoryW(wc, 512);
    QString str = QString::fromWCharArray(wc);
    strcpy(outbuf, str.toUtf8());
}
#endif

void
plat_get_global_config_dir(char *outbuf, const size_t len)
{
    if (portable_mode) {
        strncpy(outbuf, exe_path, len);
    } else {
        const auto dir = QDir(QStandardPaths::writableLocation(QStandardPaths::AppConfigLocation));
        if (!dir.exists()) {
            if (!dir.mkpath(".")) {
                qWarning("Failed to create global configuration directory %s", dir.absolutePath().toUtf8().constData());
            }
        }
        strncpy(outbuf, dir.canonicalPath().toUtf8().constData(), len);
    }

    path_slash(outbuf);
}

void
plat_get_global_data_dir(char *outbuf, const size_t len)
{
    if (portable_mode) {
        strncpy(outbuf, exe_path, len);
    } else {
        const auto dir = QDir(QStandardPaths::writableLocation(QStandardPaths::AppDataLocation));
        if (!dir.exists()) {
            if (!dir.mkpath(".")) {
                qWarning("Failed to create global data directory %s", dir.absolutePath().toUtf8().constData());
            }
        }
        strncpy(outbuf, dir.canonicalPath().toUtf8().constData(), len);
    }

    path_slash(outbuf);
}

void
plat_get_temp_dir(char *outbuf, const uint8_t len)
{
    const auto dir = QDir(QStandardPaths::writableLocation(QStandardPaths::TempLocation));
    strncpy(outbuf, dir.canonicalPath().toUtf8().constData(), len);
    path_slash(outbuf);
}

void
plat_get_vmm_dir(char *outbuf, const size_t len)
{
    QString path;

    if (portable_mode) {
        path = QDir(exe_path).filePath(VMM_PATH);
    } else {
#ifdef Q_OS_WINDOWS
        path = QDir::home().filePath(VMM_PATH_WINDOWS);
#else
        path = QDir(QStandardPaths::writableLocation(QStandardPaths::AppDataLocation)).filePath(VMM_PATH);
#endif
    }

    strncpy(outbuf, path.toUtf8().constData(), len);
    path_slash(outbuf);
}

void
plat_init_rom_paths(void)
{
    auto paths = QStandardPaths::standardLocations(QStandardPaths::GenericDataLocation);

#ifdef _WIN32
    // HACK: The standard locations returned for GenericDataLocation include
    // the EXE path and a `data` directory within it as the last two entries.

    // Remove the entries as we don't need them.
    paths.removeLast();
    paths.removeLast();
#endif

    for (auto &path : paths) {
#ifdef __APPLE__
        rom_add_path(QDir(path).filePath("net." EMU_NAME "." EMU_NAME "/roms").toUtf8().constData());
        rom_add_path(QDir(path).filePath(EMU_NAME "/roms").toUtf8().constData());
#else
        rom_add_path(QDir(path).filePath(EMU_NAME "/roms").toUtf8().constData());
#endif
    }
}

void
plat_init_asset_paths(void)
{
    auto paths = QStandardPaths::standardLocations(QStandardPaths::GenericDataLocation);

#ifdef _WIN32
    // HACK: The standard locations returned for GenericDataLocation include
    // the EXE path and a `data` directory within it as the last two entries.

    // Remove the entries as we don't need them.
    paths.removeLast();
    paths.removeLast();
#endif

    for (auto &path : paths) {
#ifdef __APPLE__
        asset_add_path(QDir(path).filePath("net." EMU_NAME "." EMU_NAME "/assets").toUtf8().constData());
        asset_add_path(QDir(path).filePath(EMU_NAME "/assets").toUtf8().constData());
#else
        asset_add_path(QDir(path).filePath(EMU_NAME "/assets").toUtf8().constData());
#endif
    }
}

void
plat_get_cpu_string(char *outbuf, uint8_t len)
{
    QString cpu_string("Unknown");
    /* Write the default string now in case we have to exit early from an error */
    qstrncpy(outbuf, cpu_string.toUtf8().constData(), len);

#ifdef Q_OS_WINDOWS
    HKEY hKey;
    if (RegOpenKeyExA(HKEY_LOCAL_MACHINE, "HARDWARE\\DESCRIPTION\\System\\CentralProcessor\\0", 0, KEY_QUERY_VALUE, &hKey) == ERROR_SUCCESS) {
        unsigned char buf[256];
        DWORD         bufSize = sizeof(buf);
        if (RegQueryValueExA(hKey, "ProcessorNameString", NULL, NULL, buf, &bufSize) == ERROR_SUCCESS)
            cpu_string = reinterpret_cast<const char *>(buf);
        RegCloseKey(hKey);
    }
#elif defined(Q_OS_LINUX)
    QString cpuinfo("/proc/cpuinfo");
    if (!QFileInfo(cpuinfo).isReadable())
        return;
    QFile file(cpuinfo);
    if (file.open(QIODevice::ReadOnly | QIODevice::Text)) {
        QTextStream textStream(&file);
        auto regex = QRegularExpression(QStringLiteral("model name\\s*:\\s*(.+)"));
        QString line;
        while (!(line = textStream.readLine()).isNull()) {
            auto match = regex.match(line);
            if (match.hasMatch()) {
                cpu_string = match.captured(1).trimmed();
                break;
            }
        }
        file.close();
    }
#elif defined(Q_OS_MACOS)
    auto process = new QProcess();
    process->start("/usr/sbin/sysctl", QStringList() << "machdep.cpu.brand_string");
    if (!process->waitForStarted() || !process->waitForFinished())
        return;
    auto command_result = QString(process->readAll());
    auto idx = command_result.indexOf(':');
    if (idx > -1)
        cpu_string = command_result.remove(idx + 1).trimmed();
#endif

    qstrncpy(outbuf, cpu_string.toUtf8().constData(), len);
}

void
plat_set_thread_name(void *thread, const char *name)
{
#ifdef Q_OS_WINDOWS
    if (!kernel32_handle) {
        kernel32_handle = dynld_module("kernel32.dll", kernel32_imports);
        if (!kernel32_handle) {
            kernel32_handle        = kernel32_imports; /* store dummy pointer to avoid trying again */
            pSetThreadDescription  = NULL;
            pSetProcessInformation = NULL;
        }
    }

    if (pSetThreadDescription) {
        size_t  len = strlen(name) + 1;
        wchar_t wname[2048];
        mbstowcs(wname, name, (len >= 1024) ? 1024 : len);
        pSetThreadDescription(thread ? (HANDLE) thread : GetCurrentThread(), wname);
    }
#else
#    ifdef Q_OS_DARWIN
    if (thread) /* macOS pthread can only set self's name */
        return;
    char truncated[64];
#    elif defined(Q_OS_NETBSD)
    char truncated[64];
#    else
    char truncated[16];
#    endif
    strncpy(truncated, name, sizeof(truncated) - 1);
#    if defined(Q_OS_DARWIN)
    pthread_setname_np(truncated);
#    elif defined(Q_OS_NETBSD)
    pthread_setname_np(thread ? *((pthread_t *) thread) : pthread_self(), truncated, (void *) "%s");
#    elif defined(__HAIKU__)
    rename_thread(find_thread(NULL), truncated);
#    elif defined(Q_OS_OPENBSD)
    pthread_set_name_np(thread ? *((pthread_t *) thread) : pthread_self(), truncated);
#    else
    pthread_setname_np(thread ? *((pthread_t *) thread) : pthread_self(), truncated);
#    endif
#endif
}

void
plat_break(void)
{
#ifdef Q_OS_WINDOWS
    DebugBreak();
#else
    raise(SIGTRAP);
#endif
}

static unsigned char *rgb_    = NULL;
static int            width_  = 0;
static int            height_ = 0;
static volatile int   waiting = 0;

static void
send_to_clipboard(void)
{
    unsigned char *rgb = (unsigned char *) calloc(1, height_ * width_ * 4);
    memcpy(rgb, rgb_, height_ * width_ * 3);
    QImage image(rgb, width_, height_, width_ * 3, QImage::Format_RGB888);
    QClipboard *clipboard = QApplication::clipboard();
    clipboard->setImage(image, QClipboard::Clipboard);
    free(rgb);
    waiting = 0;
}

void
plat_send_to_clipboard(unsigned char *rgb, int width, int height)
{
    rgb_    = rgb;
    width_  = width;
    height_ = height;
    waiting = 1;

    QTimer::singleShot(0, main_window, &send_to_clipboard);
    while (waiting)
        ;

    height_ = 0;
    width_  = 0;
    rgb_    = NULL;
}

#if !defined(Q_OS_WINDOWS) && !defined(Q_OS_MACOS)
static int
have_env_var(const char *var, const char *cmp = NULL)
{
    const char *val = getenv(var);
    return val && val[0] && (!cmp || !strnicmp(val, cmp, strlen(cmp)));
}
#endif

int
plat_run_command(const char *cmd, const char **env, const char *title)
{
    auto process = new QProcess();
    process->setInputChannelMode(QProcess::ForwardedInputChannel);
    process->setProcessChannelMode(QProcess::ForwardedChannels);
    process->setWorkingDirectory(usr_path);

    /* Take advantage of macOS displaying the script name in the title bar. */
    auto titleq = QString::fromUtf8(title);
#ifndef Q_OS_WINDOWS
    char buf[256];
#endif
#ifdef Q_OS_MACOS
    auto idx = titleq.lastIndexOf('\n');
    if (idx > -1) {
        snprintf(buf, sizeof(buf), "%s", titleq.mid(idx + 1).replace('/', QChar(0xff0f)).toUtf8().constData()); /* replace slash with fullwidth slash */
        titleq.truncate(idx);
    } else
#endif
#ifndef Q_OS_WINDOWS
        buf[0] = '\0';
#endif
    titleq.replace(QRegularExpression(QStringLiteral("\\n([^\\n]*)")), QStringLiteral(" [\\1]"));

    if (
#ifndef Q_OS_WINDOWS
        titleq.isNull() &&
#endif
        env && *env && *env[0]) { /* set environment variables for direct execution */
        auto envq = QProcessEnvironment::systemEnvironment();
        while (*env && *env[0]) {
            auto varq = QString::fromUtf8(*env++);
            auto idx = varq.indexOf('=');
            if (idx > 0)
                envq.insert(varq.left(idx), varq.mid(idx + 1));
            else
                envq.insert(varq, QStringLiteral(""));
        }
        process->setProcessEnvironment(envq);
    }

#ifdef Q_OS_WINDOWS
    /* Set up terminal execution if requested. */
    if (!titleq.isEmpty()) {
        auto titlew = titleq.toStdWString();
        process->setCreateProcessArgumentsModifier([titleq, titlew] (QProcess::CreateProcessArguments *args) {
            args->flags |= CREATE_NEW_CONSOLE;
            args->startupInfo->dwFlags &= ~STARTF_USESTDHANDLES;
            args->startupInfo->lpTitle = (wchar_t *) titlew.c_str();
        });
    }

    /* Execute command. */
    process->setProgram(getenv("ComSpec"));
    process->setNativeArguments(QString::fromUtf8(cmd).prepend(QStringLiteral("/c ")));
    return process->startDetached();
#else
    /* Generate script. */
    if (!buf[0])
        plat_tempfile(buf, (char *) ".temp", (char *) ".sh");
    char *script = nvr_path(buf);
    QFile f(script);
    if (!f.open(QIODevice::WriteOnly | QIODevice::Text))
        return 0;
    f.write("#!/bin/sh\nrm -f -- \"$0\"\n");
    if (!titleq.isEmpty()) {
        titleq.replace(QStringLiteral("\a"), QStringLiteral("")).replace(QStringLiteral("'"), QStringLiteral("'\\''"));
        f.write("printf '\e]0;%s\a' '");
        f.write(titleq.toUtf8());
        f.write("'\n");
    }
    if (!titleq.isNull() && env && *env && *env[0]) { /* set environment variables for terminal execution */
        f.write("export");
        while (*env && *env[0]) {
            f.write(" '");
            f.write(QString::fromUtf8(*env++).replace(QStringLiteral("'"), QStringLiteral("'\\''")).toUtf8());
            f.write("'");
        }
        f.write("\n");
    }
    if (!titleq.isNull())
        f.write("clear\n");
    f.write(cmd);
    f.write("\n");
    f.close();
    f.setPermissions(QFileDevice::ReadUser | QFileDevice::WriteUser | QFileDevice::ExeUser);

    /* Execute script directly or under a terminal emulator if requested. */
    if (titleq.isNull()) {
        process->setProgram(QStringLiteral("/bin/sh"));
        process->setArguments(QStringList() << script);
        if (process->startDetached())
            return 1;
    } else {
#    ifdef Q_OS_MACOS
        /* This (and AppleScript which requires user consent) opens an interactive shell and types the path in, so
           we can't control the working directory displayed in the title bar, nor the lack of auto-exit by default. */
        process->setProgram(QStringLiteral("open"));
        process->setArguments(QStringList() << QStringLiteral("-b") << QStringLiteral("com.apple.Terminal") << script);
        process->start();
        if (process->waitForStarted() && process->waitForFinished())
            return 1;
#    else
        /* Derived from xdg-utils/scripts/xdg-utils-common.in:detectDE */
        QStringList terminals;
        if (have_env_var("XDG_CURRENT_DESKTOP", "KDE") || have_env_var("DESKTOP_SESSION", "trinity") || have_env_var("KDE_FULL_SESSION"))
            terminals.prepend(QStringLiteral("konsole"));
        else
            terminals << QStringLiteral("konsole");
        if (have_env_var("XDG_CURRENT_DESKTOP", "GNOME") || have_env_var("DESKTOP_SESSION", "gnome") || have_env_var("GNOME_DESKTOP_SESSION_ID") ||
            have_env_var("XDG_CURRENT_DESKTOP", "Cinnamon") || have_env_var("XDG_CURRENT_DESKTOP", "X-Cinnamon") ||
            have_env_var("XDG_CURRENT_DESKTOP", "Unity"))
            terminals.prepend(QStringLiteral("gnome-terminal"));
        else
            terminals << QStringLiteral("gnome-terminal");
        if (have_env_var("XDG_CURRENT_DESKTOP", "MATE") || have_env_var("DESKTOP_SESSION", "MATE"))
            terminals.prepend(QStringLiteral("mate-terminal"));
        else
            terminals << QStringLiteral("mate-terminal");
        if (have_env_var("XDG_CURRENT_DESKTOP", "XFCE") || have_env_var("DESKTOP_SESSION", "xfce"))
            terminals.prepend(QStringLiteral("xfce4-terminal"));
        else
            terminals << QStringLiteral("xfce4-terminal");
        if (have_env_var("XDG_CURRENT_DESKTOP", "LXQt") || have_env_var("LXQT_SESSION_CONFIG"))
            terminals.prepend(QStringLiteral("qterminal"));
        else
            terminals << QStringLiteral("qterminal");
        if (have_env_var("XDG_CURRENT_DESKTOP", "LXDE") || have_env_var("DESKTOP_SESSION", "LXDE") || have_env_var("DESKTOP_SESSION", "Lubuntu"))
            terminals.prepend(QStringLiteral("lxterminal"));
        else
            terminals << QStringLiteral("lxterminal");
        terminals.prepend(QStringLiteral("x-terminal-emulator"));
        terminals.prepend(QStringLiteral("xdg-terminal-exec"));
        terminals << QStringLiteral("xterm") << QStringLiteral("urxvt") << QStringLiteral("rxvt");

        for (const auto &terminal : terminals) {
            process->setProgram(terminal);
            QStringList args;
            if (terminal == QStringLiteral("xdg-terminal-exec"))
                args << QString("--dir=").append(process->workingDirectory()) << QStringLiteral("--");
            else if (!terminal.endsWith(QStringLiteral("-terminal")) || (terminal == QStringLiteral("xfce4-terminal")))
                args << QStringLiteral("-e");
            else
                args << QStringLiteral("--");
            args << script;
            process->setArguments(args);
            if (process->startDetached())
                return 1;
        }
#    endif
    }

    /* Delete script if execution failed. */
    f.remove();
    return 0;
#endif
}
