//TODO: don't copy/mount DeveloperDiskImage.dmg if it's already done - Xcode checks this somehow

#import <CoreFoundation/CoreFoundation.h>
#import <Foundation/Foundation.h>
#include <unistd.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/un.h>
#include <sys/sysctl.h>
#include <stdio.h>
#include <signal.h>
#include <getopt.h>
#include <pwd.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include "MobileDevice.h"

#define APP_VERSION    "1.0.6"
#define PREP_CMDS_PATH "/tmp/fruitstrap-lldb-prep-cmds-"
#define LLDB_SHELL "lldb -s " PREP_CMDS_PATH

/*
 * Startup script passed to lldb.
 * To see how xcode interacts with lldb, put this into .lldbinit:
 * log enable -v -f /Users/vargaz/lldb.log lldb all
 * log enable -v -f /Users/vargaz/gdb-remote.log gdb-remote all
 */
#define LLDB_PREP_CMDS CFSTR("\
    platform select remote-ios --sysroot {symbols_path}\n\
    target create \"{disk_app}\"\n\
    script fruitstrap_device_app=\"{device_app}\"\n\
    script fruitstrap_connect_url=\"connect://127.0.0.1:{device_port}\"\n\
    command script import \"{python_file_path}\"\n\
    command script add -f {python_command}.connect_command connect\n\
    command script add -s asynchronous -f {python_command}.run_command run\n\
    command script add -s asynchronous -f {python_command}.autoexit_command autoexit\n\
    connect\n\
")

const char* lldb_prep_no_cmds = "";

const char* lldb_prep_interactive_cmds = "\
    run\n\
";

const char* lldb_prep_noninteractive_cmds = "\
    run\n\
    autoexit\n\
";

/*
 * Some things do not seem to work when using the normal commands like process connect/launch, so we invoke them
 * through the python interface. Also, Launch () doesn't seem to work when ran from init_module (), so we add
 * a command which can be used by the user to run it.
 */
#define LLDB_FRUITSTRAP_MODULE CFSTR("\
import lldb\n\
import sys\n\
\n\
def connect_command(debugger, command, result, internal_dict):\n\
    # These two are passed in by the script which loads us\n\
    connect_url = internal_dict['fruitstrap_connect_url']\n\
    error = lldb.SBError()\n\
\n\
    process = lldb.target.ConnectRemote(lldb.target.GetDebugger().GetListener(), connect_url, None, error)\n\
\n\
    # Wait for connection to succeed\n\
    listener = lldb.target.GetDebugger().GetListener()\n\
    listener.StartListeningForEvents(process.GetBroadcaster(), lldb.SBProcess.eBroadcastBitStateChanged)\n\
    events = []\n\
    state = lldb.eStateInvalid\n\
    while state != lldb.eStateConnected:\n\
        event = lldb.SBEvent()\n\
        if listener.WaitForEvent(1, event):\n\
            state = process.GetStateFromEvent(event)\n\
            events.append(event)\n\
        else:\n\
            state = lldb.eStateInvalid\n\
\n\
    # Add events back to queue, otherwise lldb freezes\n\
    for event in events:\n\
        listener.AddEvent(event)\n\
\n\
def run_command(debugger, command, result, internal_dict):\n\
    device_app = internal_dict['fruitstrap_device_app']\n\
    error = lldb.SBError()\n\
    lldb.target.modules[0].SetPlatformFileSpec(lldb.SBFileSpec(device_app))\n\
    lldb.target.Launch(lldb.SBLaunchInfo(['{args}']), error)\n\
    print str(error)\n\
\n\
def autoexit_command(debugger, command, result, internal_dict):\n\
    process = lldb.target.process\n\
    listener = debugger.GetListener()\n\
    listener.StartListeningForEvents(process.GetBroadcaster(), lldb.SBProcess.eBroadcastBitStateChanged | lldb.SBProcess.eBroadcastBitSTDOUT | lldb.SBProcess.eBroadcastBitSTDERR)\n\
    event = lldb.SBEvent()\n\
    while True:\n\
        if listener.WaitForEvent(1, event):\n\
            state = process.GetStateFromEvent(event)\n\
        else:\n\
            state = lldb.eStateInvalid\n\
\n\
        stdout = process.GetSTDOUT(1024)\n\
        while stdout:\n\
            sys.stdout.write(stdout)\n\
            stdout = process.GetSTDOUT(1024)\n\
\n\
        stderr = process.GetSTDERR(1024)\n\
        while stderr:\n\
            sys.stdout.write(stderr)\n\
            stderr = process.GetSTDERR(1024)\n\
\n\
        if lldb.SBProcess.EventIsProcessEvent(event):\n\
            if state == lldb.eStateExited:\n\
                sys.exit(process.GetExitStatus())\n\
            if state == lldb.eStateStopped:\n\
                debugger.HandleCommand('frame select')\n\
                debugger.HandleCommand('bt')\n\
                sys.exit({exitcode_app_crash})\n\
")

typedef struct am_device * AMDeviceRef;
int AMDeviceSecureTransferPath(int zero, AMDeviceRef device, CFURLRef url, CFDictionaryRef options, void *callback, int cbarg);
int AMDeviceSecureInstallApplication(int zero, AMDeviceRef device, CFURLRef url, CFDictionaryRef options, void *callback, int cbarg);
int AMDeviceMountImage(AMDeviceRef device, CFStringRef image, CFDictionaryRef options, void *callback, int cbarg);
mach_error_t AMDeviceLookupApplications(AMDeviceRef device, CFDictionaryRef options, CFDictionaryRef *result);

bool found_device = false, debug = false, verbose = false, unbuffered = false, nostart = false, detect_only = false, install = true;
bool interactive = true;
char *app_path = NULL;
char *device_id = NULL;
char *args = NULL;
int timeout = 0;
int port = 12345;
CFStringRef last_path = NULL;
service_conn_t gdbfd;
pid_t parent = 0;
// PID of child process running lldb
pid_t child = 0;
// Signal sent from child to parent process when LLDB finishes.
const int SIGLLDB = SIGUSR1;

// Error codes we report on different failures, so scripts can distinguish between user app exit
// codes and our exit codes. For non app errors we use codes in reserved 128-255 range.
const int exitcode_error = 253;
const int exitcode_app_crash = 254;

Boolean path_exists(CFTypeRef path) {
    if (CFGetTypeID(path) == CFStringGetTypeID()) {
        CFURLRef url = CFURLCreateWithFileSystemPath(NULL, path, kCFURLPOSIXPathStyle, true);
        Boolean result = CFURLResourceIsReachable(url, NULL);
        CFRelease(url);
        return result;
    } else if (CFGetTypeID(path) == CFURLGetTypeID()) {
        return CFURLResourceIsReachable(path, NULL);
    } else {
        return false;
    }
}

CFStringRef find_path(CFStringRef rootPath, CFStringRef namePattern, CFStringRef expression) {
    FILE *fpipe = NULL;
    CFStringRef quotedRootPath = rootPath;
    if (CFStringGetCharacterAtIndex(rootPath, 0) != '`') {
        quotedRootPath = CFStringCreateWithFormat(NULL, NULL, CFSTR("'%@'"), rootPath);
    }
    CFStringRef cf_command = CFStringCreateWithFormat(NULL, NULL, CFSTR("find %@ -name '%@' %@ 2>/dev/null | sort | tail -n 1"), quotedRootPath, namePattern, expression);
    if (quotedRootPath != rootPath) {
        CFRelease(quotedRootPath);
    }

    char command[1024] = { '\0' };
    CFStringGetCString(cf_command, command, sizeof(command), kCFStringEncodingUTF8);
    CFRelease(cf_command);

    if (!(fpipe = (FILE *)popen(command, "r")))
    {
        perror("Error encountered while opening pipe");
        exit(exitcode_error);
    }

    char buffer[256] = { '\0' };

    fgets(buffer, sizeof(buffer), fpipe);
    pclose(fpipe);

    strtok(buffer, "\n");
    return CFStringCreateWithCString(NULL, buffer, kCFStringEncodingUTF8);
}

CFStringRef copy_long_shot_disk_image_path() {
    return find_path(CFSTR("`xcode-select --print-path`"), CFSTR("DeveloperDiskImage.dmg"), CFSTR(""));
}

CFStringRef copy_xcode_dev_path() {
    static char xcode_dev_path[256] = { '\0' };
    if (strlen(xcode_dev_path) == 0) {
        FILE *fpipe = NULL;
        char *command = "xcode-select -print-path";

        if (!(fpipe = (FILE *)popen(command, "r")))
        {
            perror("Error encountered while opening pipe");
            exit(exitcode_error);
        }

        char buffer[256] = { '\0' };

        fgets(buffer, sizeof(buffer), fpipe);
        pclose(fpipe);

        strtok(buffer, "\n");
        strcpy(xcode_dev_path, buffer);
    }
    return CFStringCreateWithCString(NULL, xcode_dev_path, kCFStringEncodingUTF8);
}

const char *get_home() {
    const char* home = getenv("HOME");
    if (!home) {
        struct passwd *pwd = getpwuid(getuid());
        home = pwd->pw_dir;
    }
    return home;
}

CFStringRef copy_xcode_path_for(CFStringRef subPath, CFStringRef search) {
    CFStringRef xcodeDevPath = copy_xcode_dev_path();
    CFStringRef path;
    bool found = false;
    const char* home = get_home();


    // Try using xcode-select --print-path
    if (!found) {
        path = CFStringCreateWithFormat(NULL, NULL, CFSTR("%@/%@/%@"), xcodeDevPath, subPath, search);
        found = path_exists(path);
    }
    // Try find `xcode-select --print-path` with search as a name pattern
    if (!found) {
        path = find_path(CFStringCreateWithFormat(NULL, NULL, CFSTR("%@/%@"), xcodeDevPath, subPath), search, CFSTR("-maxdepth 1"));
        found = CFStringGetLength(path) > 0 && path_exists(path);
    }
    // If not look in the default xcode location (xcode-select is sometimes wrong)
    if (!found) {
        path = CFStringCreateWithFormat(NULL, NULL, CFSTR("/Applications/Xcode.app/Contents/Developer/%@&%@"), subPath, search);
        found = path_exists(path);
    }
    // If not look in the users home directory, Xcode can store device support stuff there
    if (!found) {
        path = CFStringCreateWithFormat(NULL, NULL, CFSTR("%s/Library/Developer/Xcode/%@/%@"), home, subPath, search);
        found = path_exists(path);
    }

    CFRelease(xcodeDevPath);

    if (found) {
        return path;
    } else {
        CFRelease(path);
        return NULL;
    }
}

CFMutableArrayRef get_device_product_version_parts(AMDeviceRef device) {
    CFStringRef version = AMDeviceCopyValue(device, 0, CFSTR("ProductVersion"));
    CFArrayRef parts = CFStringCreateArrayBySeparatingStrings(NULL, version, CFSTR("."));
    CFMutableArrayRef result = CFArrayCreateMutableCopy(NULL, CFArrayGetCount(parts), parts);
    CFRelease(version);
    CFRelease(parts);
    return result;
}

CFStringRef copy_device_support_path(AMDeviceRef device) {
    CFStringRef version = NULL;
    CFStringRef build = AMDeviceCopyValue(device, 0, CFSTR("BuildVersion"));
    CFStringRef path = NULL;
    CFMutableArrayRef version_parts = get_device_product_version_parts(device);

    while (CFArrayGetCount(version_parts) > 0) {
        version = CFStringCreateByCombiningStrings(NULL, version_parts, CFSTR("."));
        if (path == NULL) {
            path = copy_xcode_path_for(CFSTR("iOS DeviceSupport"), CFStringCreateWithFormat(NULL, NULL, CFSTR("%@ (%@)"), version, build));
        }
        if (path == NULL) {
            path = copy_xcode_path_for(CFSTR("Platforms/iPhoneOS.platform/DeviceSupport"), CFStringCreateWithFormat(NULL, NULL, CFSTR("%@ (%@)"), version, build));
        }
        if (path == NULL) {
            path = copy_xcode_path_for(CFSTR("Platforms/iPhoneOS.platform/DeviceSupport"), CFStringCreateWithFormat(NULL, NULL, CFSTR("%@ (*)"), version));
        }
        if (path == NULL) {
            path = copy_xcode_path_for(CFSTR("Platforms/iPhoneOS.platform/DeviceSupport"), version);
        }
        if (path == NULL) {
            path = copy_xcode_path_for(CFSTR("Platforms/iPhoneOS.platform/DeviceSupport/Latest"), CFSTR(""));
        }
        CFRelease(version);
        if (path != NULL) {
            break;
        }
        CFArrayRemoveValueAtIndex(version_parts, CFArrayGetCount(version_parts) - 1);
    }

    CFRelease(version_parts);
    CFRelease(build);

    if (path == NULL)
    {
        printf("[ !! ] Unable to locate DeviceSupport directory.\n[ !! ] This probably means you don't have Xcode installed, you will need to launch the app manually and logging output will not be shown!\n");
        exit(exitcode_error);
    }

    return path;
}

CFStringRef copy_developer_disk_image_path(CFStringRef deviceSupportPath) {
    CFStringRef path = CFStringCreateWithFormat(NULL, NULL, CFSTR("%@/%@"), deviceSupportPath, CFSTR("DeveloperDiskImage.dmg"));
    if (!path_exists(path)) {
        CFRelease(path);
        path = NULL;
    }

    if (path == NULL) {
        // Sometimes Latest seems to be missing in Xcode, in that case use find and hope for the best
        path = copy_long_shot_disk_image_path();
        if (CFStringGetLength(path) < 5) {
            CFRelease(path);
            path = NULL;
        }
    }

    if (path == NULL)
    {
        printf("[ !! ] Unable to locate DeveloperDiskImage.dmg.\n[ !! ] This probably means you don't have Xcode installed, you will need to launch the app manually and logging output will not be shown!\n");
        exit(exitcode_error);
    }

    return path;
}

void mount_callback(CFDictionaryRef dict, int arg) {
    CFStringRef status = CFDictionaryGetValue(dict, CFSTR("Status"));

    if (CFEqual(status, CFSTR("LookingUpImage"))) {
        printf("[  0%%] Looking up developer disk image\n");
    } else if (CFEqual(status, CFSTR("CopyingImage"))) {
        printf("[ 30%%] Copying DeveloperDiskImage.dmg to device\n");
    } else if (CFEqual(status, CFSTR("MountingImage"))) {
        printf("[ 90%%] Mounting developer disk image\n");
    }
}

void mount_developer_image(AMDeviceRef device) {
    CFStringRef ds_path = copy_device_support_path(device);
    CFStringRef image_path = copy_developer_disk_image_path(ds_path);
    CFStringRef sig_path = CFStringCreateWithFormat(NULL, NULL, CFSTR("%@.signature"), image_path);

    if (verbose) {
        printf("Device support path: %s\n", CFStringGetCStringPtr(ds_path, CFStringGetSystemEncoding()));
        printf("Developer disk image: %s\n", CFStringGetCStringPtr(image_path, CFStringGetSystemEncoding()));
    }
    CFRelease(ds_path);

    FILE* sig = fopen(CFStringGetCStringPtr(sig_path, kCFStringEncodingMacRoman), "rb");
    void *sig_buf = malloc(128);
    assert(fread(sig_buf, 1, 128, sig) == 128);
    fclose(sig);
    CFDataRef sig_data = CFDataCreateWithBytesNoCopy(NULL, sig_buf, 128, NULL);
    CFRelease(sig_path);

    CFTypeRef keys[] = { CFSTR("ImageSignature"), CFSTR("ImageType") };
    CFTypeRef values[] = { sig_data, CFSTR("Developer") };
    CFDictionaryRef options = CFDictionaryCreate(NULL, (const void **)&keys, (const void **)&values, 2, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
    CFRelease(sig_data);

    int result = AMDeviceMountImage(device, image_path, options, &mount_callback, 0);
    if (result == 0) {
        printf("[ 95%%] Developer disk image mounted successfully\n");
    } else if (result == 0xe8000076 /* already mounted */) {
        printf("[ 95%%] Developer disk image already mounted\n");
    } else {
        printf("[ !! ] Unable to mount developer disk image. (%x)\n", result);
        exit(exitcode_error);
    }

    CFRelease(image_path);
    CFRelease(options);
}

mach_error_t transfer_callback(CFDictionaryRef dict, int arg) {
    int percent;
    CFStringRef status = CFDictionaryGetValue(dict, CFSTR("Status"));
    CFNumberGetValue(CFDictionaryGetValue(dict, CFSTR("PercentComplete")), kCFNumberSInt32Type, &percent);

    if (CFEqual(status, CFSTR("CopyingFile"))) {
        CFStringRef path = CFDictionaryGetValue(dict, CFSTR("Path"));

        if ((last_path == NULL || !CFEqual(path, last_path)) && !CFStringHasSuffix(path, CFSTR(".ipa"))) {
            printf("[%3d%%] Copying %s to device\n", percent / 2, CFStringGetCStringPtr(path, kCFStringEncodingMacRoman));
        }

        if (last_path != NULL) {
            CFRelease(last_path);
        }
        last_path = CFStringCreateCopy(NULL, path);
    }

    return 0;
}

mach_error_t install_callback(CFDictionaryRef dict, int arg) {
    int percent;
    CFStringRef status = CFDictionaryGetValue(dict, CFSTR("Status"));
    CFNumberGetValue(CFDictionaryGetValue(dict, CFSTR("PercentComplete")), kCFNumberSInt32Type, &percent);

    printf("[%3d%%] %s\n", (percent / 2) + 50, CFStringGetCStringPtr(status, kCFStringEncodingMacRoman));
    return 0;
}

CFURLRef copy_device_app_url(AMDeviceRef device, CFStringRef identifier) {
    CFDictionaryRef result = nil;

    NSArray *a = [NSArray arrayWithObjects:
                  @"CFBundleIdentifier",			// absolute must
                  @"ApplicationDSID",
                  @"ApplicationType",
                  @"CFBundleExecutable",
                  @"CFBundleDisplayName",
                  @"CFBundleIconFile",
                  @"CFBundleName",
                  @"CFBundleShortVersionString",
                  @"CFBundleSupportedPlatforms",
                  @"CFBundleURLTypes",
                  @"CodeInfoIdentifier",
                  @"Container",
                  @"Entitlements",
                  @"HasSettingsBundle",
                  @"IsUpgradeable",
                  @"MinimumOSVersion",
                  @"Path",
                  @"SignerIdentity",
                  @"UIDeviceFamily",
                  @"UIFileSharingEnabled",
                  @"UIStatusBarHidden",
                  @"UISupportedInterfaceOrientations",
                  nil];
    
    NSDictionary *optionsDict = [NSDictionary dictionaryWithObject:a forKey:@"ReturnAttributes"];
	CFDictionaryRef options = (CFDictionaryRef)optionsDict;
    
    afc_error_t resultStatus = AMDeviceLookupApplications(device, options, &result);
    assert(resultStatus == 0);

    CFDictionaryRef app_dict = CFDictionaryGetValue(result, identifier);
    assert(app_dict != NULL);

    CFStringRef app_path = CFDictionaryGetValue(app_dict, CFSTR("Path"));
    assert(app_path != NULL);

    CFURLRef url = CFURLCreateWithFileSystemPath(NULL, app_path, kCFURLPOSIXPathStyle, true);
    CFRelease(result);
    return url;
}

CFStringRef copy_disk_app_identifier(CFURLRef disk_app_url) {
    CFURLRef plist_url = CFURLCreateCopyAppendingPathComponent(NULL, disk_app_url, CFSTR("Info.plist"), false);
    CFReadStreamRef plist_stream = CFReadStreamCreateWithFile(NULL, plist_url);
    CFReadStreamOpen(plist_stream);
    CFPropertyListRef plist = CFPropertyListCreateWithStream(NULL, plist_stream, 0, kCFPropertyListImmutable, NULL, NULL);
    CFStringRef bundle_identifier = CFRetain(CFDictionaryGetValue(plist, CFSTR("CFBundleIdentifier")));
    CFReadStreamClose(plist_stream);

    CFRelease(plist_url);
    CFRelease(plist_stream);
    CFRelease(plist);

    return bundle_identifier;
}

void write_lldb_prep_cmds(AMDeviceRef device, CFURLRef disk_app_url) {
    CFStringRef ds_path = copy_device_support_path(device);
    CFStringRef symbols_path = CFStringCreateWithFormat(NULL, NULL, CFSTR("'%@/Symbols'"), ds_path);

    CFMutableStringRef cmds = CFStringCreateMutableCopy(NULL, 0, LLDB_PREP_CMDS);
    CFRange range = { 0, CFStringGetLength(cmds) };

    CFStringFindAndReplace(cmds, CFSTR("{symbols_path}"), symbols_path, range, 0);
    range.length = CFStringGetLength(cmds);

    CFStringFindAndReplace(cmds, CFSTR("{ds_path}"), ds_path, range, 0);
    range.length = CFStringGetLength(cmds);

    CFMutableStringRef pmodule = CFStringCreateMutableCopy(NULL, 0, LLDB_FRUITSTRAP_MODULE);

    CFRange rangeLLDB = { 0, CFStringGetLength(pmodule) };
    CFStringRef exitcode_app_crash_str = CFStringCreateWithFormat(NULL, NULL, CFSTR("%d"), exitcode_app_crash);
    CFStringFindAndReplace(pmodule, CFSTR("{exitcode_app_crash}"), exitcode_app_crash_str, rangeLLDB, 0);
    rangeLLDB.length = CFStringGetLength(pmodule);

    if (args) {
        CFStringRef cf_args = CFStringCreateWithCString(NULL, args, kCFStringEncodingASCII);
        CFStringFindAndReplace(cmds, CFSTR("{args}"), cf_args, range, 0);

        //format the arguments 'arg1 arg2 ....' to an argument list ['arg1', 'arg2', ...]
        CFMutableStringRef argsListLLDB = CFStringCreateMutableCopy(NULL, 0, cf_args);
        rangeLLDB.length = CFStringGetLength(argsListLLDB);
        CFStringFindAndReplace(argsListLLDB, CFSTR(" "), CFSTR(" "), rangeLLDB, 0);//remove multiple spaces
        rangeLLDB.length = CFStringGetLength(argsListLLDB);
        CFStringFindAndReplace(argsListLLDB, CFSTR(" "), CFSTR("', '"), rangeLLDB, 0);
        rangeLLDB.length = CFStringGetLength(pmodule);
        CFStringFindAndReplace(pmodule, CFSTR("{args}"), argsListLLDB, rangeLLDB, 0);

        CFRelease(cf_args);
    } else {
        CFStringFindAndReplace(cmds, CFSTR(" {args}"), CFSTR(""), range, 0);
    }
    range.length = CFStringGetLength(cmds);

    CFStringRef bundle_identifier = copy_disk_app_identifier(disk_app_url);
    CFURLRef device_app_url = copy_device_app_url(device, bundle_identifier);
    CFStringRef device_app_path = CFURLCopyFileSystemPath(device_app_url, kCFURLPOSIXPathStyle);
    CFStringFindAndReplace(cmds, CFSTR("{device_app}"), device_app_path, range, 0);
    range.length = CFStringGetLength(cmds);

    CFStringRef disk_app_path = CFURLCopyFileSystemPath(disk_app_url, kCFURLPOSIXPathStyle);
    CFStringFindAndReplace(cmds, CFSTR("{disk_app}"), disk_app_path, range, 0);
    range.length = CFStringGetLength(cmds);

    CFStringRef device_port = CFStringCreateWithFormat(NULL, NULL, CFSTR("%d"), port);
    CFStringFindAndReplace(cmds, CFSTR("{device_port}"), device_port, range, 0);
    range.length = CFStringGetLength(cmds);

    CFURLRef device_container_url = CFURLCreateCopyDeletingLastPathComponent(NULL, device_app_url);
    CFStringRef device_container_path = CFURLCopyFileSystemPath(device_container_url, kCFURLPOSIXPathStyle);
    CFMutableStringRef dcp_noprivate = CFStringCreateMutableCopy(NULL, 0, device_container_path);
    range.length = CFStringGetLength(dcp_noprivate);
    CFStringFindAndReplace(dcp_noprivate, CFSTR("/private/var/"), CFSTR("/var/"), range, 0);
    range.length = CFStringGetLength(cmds);
    CFStringFindAndReplace(cmds, CFSTR("{device_container}"), dcp_noprivate, range, 0);
    range.length = CFStringGetLength(cmds);

    CFURLRef disk_container_url = CFURLCreateCopyDeletingLastPathComponent(NULL, disk_app_url);
    CFStringRef disk_container_path = CFURLCopyFileSystemPath(disk_container_url, kCFURLPOSIXPathStyle);
    CFStringFindAndReplace(cmds, CFSTR("{disk_container}"), disk_container_path, range, 0);

    char python_file_path[300] = "/tmp/fruitstrap_";
    char python_command[300] = "fruitstrap_";
    if(device_id != NULL) {
        strcat(python_file_path, device_id);
        strcat(python_command, device_id);
    }
    strcat(python_file_path, ".py");

    CFStringRef cf_python_command = CFStringCreateWithCString(NULL, python_command, kCFStringEncodingASCII);
    CFStringFindAndReplace(cmds, CFSTR("{python_command}"), cf_python_command, range, 0);
    range.length = CFStringGetLength(cmds);
    CFStringRef cf_python_file_path = CFStringCreateWithCString(NULL, python_file_path, kCFStringEncodingASCII);
    CFStringFindAndReplace(cmds, CFSTR("{python_file_path}"), cf_python_file_path, range, 0);
    range.length = CFStringGetLength(cmds);

    CFDataRef cmds_data = CFStringCreateExternalRepresentation(NULL, cmds, kCFStringEncodingASCII, 0);
    char prep_cmds_path[300] = PREP_CMDS_PATH;
    if(device_id != NULL)
        strcat(prep_cmds_path, device_id);
    FILE *out = fopen(prep_cmds_path, "w");
    fwrite(CFDataGetBytePtr(cmds_data), CFDataGetLength(cmds_data), 1, out);
    // Write additional commands based on mode we're running in
    const char* extra_cmds;
    if (!interactive)
        extra_cmds = lldb_prep_noninteractive_cmds;
    else if (nostart)
        extra_cmds = lldb_prep_no_cmds;
    else
        extra_cmds = lldb_prep_interactive_cmds;
    fwrite(extra_cmds, strlen(extra_cmds), 1, out);
    fclose(out);

    CFDataRef pmodule_data = CFStringCreateExternalRepresentation(NULL, pmodule, kCFStringEncodingASCII, 0);

    out = fopen(python_file_path, "w");
    fwrite(CFDataGetBytePtr(pmodule_data), CFDataGetLength(pmodule_data), 1, out);
    fclose(out);

    CFRelease(cmds);
    if (ds_path != NULL) CFRelease(ds_path);
    CFRelease(bundle_identifier);
    CFRelease(device_app_url);
    CFRelease(device_app_path);
    CFRelease(disk_app_path);
    CFRelease(device_container_url);
    CFRelease(device_container_path);
    CFRelease(dcp_noprivate);
    CFRelease(disk_container_url);
    CFRelease(disk_container_path);
    CFRelease(cmds_data);
    CFRelease(cf_python_command);
    CFRelease(cf_python_file_path);
}

CFSocketRef server_socket;
CFSocketRef lldb_socket;
CFWriteStreamRef serverWriteStream = NULL;
CFWriteStreamRef lldbWriteStream = NULL;

void
server_callback (CFSocketRef s, CFSocketCallBackType callbackType, CFDataRef address, const void *data, void *info)
{
    int res;

    //PRINT ("server: %s\n", CFDataGetBytePtr (data));

    if (CFDataGetLength (data) == 0) {
        // FIXME: Close the socket
        //shutdown (CFSocketGetNative (lldb_socket), SHUT_RDWR);
        //close (CFSocketGetNative (lldb_socket));
        return;
    }
    res = write (CFSocketGetNative (lldb_socket), CFDataGetBytePtr (data), CFDataGetLength (data));
}

void lldb_callback(CFSocketRef s, CFSocketCallBackType callbackType, CFDataRef address, const void *data, void *info)
{
    //PRINT ("lldb: %s\n", CFDataGetBytePtr (data));

    if (CFDataGetLength (data) == 0)
        return;
    write (gdbfd, CFDataGetBytePtr (data), CFDataGetLength (data));
}

void fdvendor_callback(CFSocketRef s, CFSocketCallBackType callbackType, CFDataRef address, const void *data, void *info) {
    CFSocketNativeHandle socket = (CFSocketNativeHandle)(*((CFSocketNativeHandle *)data));

    assert (callbackType == kCFSocketAcceptCallBack);
    //PRINT ("callback!\n");

    lldb_socket  = CFSocketCreateWithNative(NULL, socket, kCFSocketDataCallBack, &lldb_callback, NULL);
    CFRunLoopAddSource(CFRunLoopGetMain(), CFSocketCreateRunLoopSource(NULL, lldb_socket, 0), kCFRunLoopCommonModes);
}

void start_remote_debug_server(AMDeviceRef device) {
    char buf [256];
    int res, err, i;
    char msg [256];
    int chsum, len;
    struct stat s;
    socklen_t buflen;
    struct sockaddr name;
    int namelen;

    assert(AMDeviceStartService(device, CFSTR("com.apple.debugserver"), &gdbfd, NULL) == 0);
    assert (gdbfd);

    /*
     * The debugserver connection is through a fd handle, while lldb requires a host/port to connect, so create an intermediate
     * socket to transfer data.
     */
    server_socket = CFSocketCreateWithNative (NULL, gdbfd, kCFSocketDataCallBack, &server_callback, NULL);
    CFRunLoopAddSource(CFRunLoopGetMain(), CFSocketCreateRunLoopSource(NULL, server_socket, 0), kCFRunLoopCommonModes);

    struct sockaddr_in addr4;
    memset(&addr4, 0, sizeof(addr4));
    addr4.sin_len = sizeof(addr4);
    addr4.sin_family = AF_INET;
    addr4.sin_port = htons(port);
    addr4.sin_addr.s_addr = htonl(INADDR_ANY);

    CFSocketRef fdvendor = CFSocketCreate(NULL, PF_INET, 0, 0, kCFSocketAcceptCallBack, &fdvendor_callback, NULL);

    int yes = 1;
    setsockopt(CFSocketGetNative(fdvendor), SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(yes));
    int flag = 1;
    res = setsockopt(CFSocketGetNative(fdvendor), IPPROTO_TCP, TCP_NODELAY, (char *) &flag, sizeof(int));
    assert (res == 0);

    CFDataRef address_data = CFDataCreate(NULL, (const UInt8 *)&addr4, sizeof(addr4));

    CFSocketSetAddress(fdvendor, address_data);
    CFRelease(address_data);
    CFRunLoopAddSource(CFRunLoopGetMain(), CFSocketCreateRunLoopSource(NULL, fdvendor, 0), kCFRunLoopCommonModes);
}

void kill_ptree_inner(pid_t root, int signum, struct kinfo_proc *kp, int kp_len) {
    int i;
    for (i = 0; i < kp_len; i++) {
        if (kp[i].kp_eproc.e_ppid == root) {
            kill_ptree_inner(kp[i].kp_proc.p_pid, signum, kp, kp_len);
        }
    }
    if (root != getpid()) {
        kill(root, signum);
    }
}

int kill_ptree(pid_t root, int signum) {
    int mib[3];
    size_t len;
    mib[0] = CTL_KERN;
    mib[1] = KERN_PROC;
    mib[2] = KERN_PROC_ALL;
    if (sysctl(mib, 3, NULL, &len, NULL, 0) == -1) {
        return -1;
    }

    struct kinfo_proc *kp = calloc(1, len);
    if (!kp) {
        return -1;
    }

    if (sysctl(mib, 3, kp, &len, NULL, 0) == -1) {
        free(kp);
        return -1;
    }

    kill_ptree_inner(root, signum, kp, len / sizeof(struct kinfo_proc));

    free(kp);
    return 0;
}

void killed(int signum) {
    // SIGKILL needed to kill lldb, probably a better way to do this.
    kill(0, SIGKILL);
    _exit(0);
}

void lldb_finished_handler(int signum)
{
    int status = 0;
    if (waitpid(child, &status, 0) == -1)
        perror("waitpid failed");
    _exit(WEXITSTATUS(status));
}

void bring_process_to_foreground() {
    if (setpgid(0, 0) == -1)
        perror("setpgid failed");

    signal(SIGTTOU, SIG_IGN);
    if (tcsetpgrp(STDIN_FILENO, getpid()) == -1)
        perror("tcsetpgrp failed");
    signal(SIGTTOU, SIG_DFL);
}

void launch_debugger(AMDeviceRef device, CFURLRef url) {
    AMDeviceConnect(device);
    assert(AMDeviceIsPaired(device));
    assert(AMDeviceValidatePairing(device) == 0);
    assert(AMDeviceStartSession(device) == 0);

    printf("------ Debug phase ------\n");

    mount_developer_image(device);      // put debugserver on the device
    start_remote_debug_server(device);  // start debugserver
    write_lldb_prep_cmds(device, url);   // dump the necessary lldb commands into a file

    CFRelease(url);

    printf("[100%%] Connecting to remote debug server\n");
    printf("-------------------------\n");

    setpgid(getpid(), 0);
    signal(SIGHUP, killed);
    signal(SIGINT, killed);
    signal(SIGTERM, killed);
    // Need this before fork to avoid race conditions. For child process we remove this right after fork.
    signal(SIGLLDB, lldb_finished_handler);

    parent = getpid();
    int pid = fork();
    if (pid == 0) {
        signal(SIGHUP, SIG_DFL);
        signal(SIGLLDB, SIG_DFL);
        child = getpid();
        bring_process_to_foreground();

        char lldb_shell[400];
        sprintf(lldb_shell, LLDB_SHELL);
        if(device_id != NULL)
            strcat(lldb_shell, device_id);

        int status = system(lldb_shell); // launch lldb
        if (status == -1)
            perror("failed launching lldb");

        // Notify parent we're exiting
        kill(parent, SIGLLDB);
        // Pass lldb exit code
        _exit(WEXITSTATUS(status));
    } else if (pid > 0) {
        child = pid;
    } else {
        perror("fork failed");
        exit(exitcode_error);
    }
}

void handle_device(AMDeviceRef device) {
    if (found_device) return; // handle one device only
    CFStringRef found_device_id = AMDeviceCopyDeviceIdentifier(device);

    if (device_id != NULL) {
        if(strcmp(device_id, CFStringGetCStringPtr(found_device_id, CFStringGetSystemEncoding())) == 0) {
            found_device = true;
        } else {
            return;
        }
    } else {
        found_device = true;
    }

    if (detect_only) {
        printf("[....] Found device (%s).\n", CFStringGetCStringPtr(found_device_id, CFStringGetSystemEncoding()));
        exit(0);
    }


    CFRetain(device); // don't know if this is necessary?

    CFStringRef path = CFStringCreateWithCString(NULL, app_path, kCFStringEncodingASCII);
    CFURLRef relative_url = CFURLCreateWithFileSystemPath(NULL, path, kCFURLPOSIXPathStyle, false);
    CFURLRef url = CFURLCopyAbsoluteURL(relative_url);

    CFRelease(relative_url);

    if(install) {
        printf("[  0%%] Found device (%s), beginning install\n", CFStringGetCStringPtr(found_device_id, CFStringGetSystemEncoding()));

        AMDeviceConnect(device);
        assert(AMDeviceIsPaired(device));
        assert(AMDeviceValidatePairing(device) == 0);
        assert(AMDeviceStartSession(device) == 0);


        service_conn_t afcFd;
        assert(AMDeviceStartService(device, CFSTR("com.apple.afc"), &afcFd, NULL) == 0);
        assert(AMDeviceStopSession(device) == 0);
        assert(AMDeviceDisconnect(device) == 0);
        assert(AMDeviceTransferApplication(afcFd, path, NULL, transfer_callback, NULL) == 0);

        close(afcFd);

        CFStringRef keys[] = { CFSTR("PackageType") };
        CFStringRef values[] = { CFSTR("Developer") };
        CFDictionaryRef options = CFDictionaryCreate(NULL, (const void **)&keys, (const void **)&values, 1, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);

        AMDeviceConnect(device);
        assert(AMDeviceIsPaired(device));
        assert(AMDeviceValidatePairing(device) == 0);
        assert(AMDeviceStartSession(device) == 0);

        service_conn_t installFd;
        assert(AMDeviceStartService(device, CFSTR("com.apple.mobile.installation_proxy"), &installFd, NULL) == 0);

        assert(AMDeviceStopSession(device) == 0);
        assert(AMDeviceDisconnect(device) == 0);

        mach_error_t result = AMDeviceInstallApplication(installFd, path, options, install_callback, NULL);
        if (result != 0)
        {
            printf("AMDeviceInstallApplication failed: %d\n", result);
            exit(exitcode_error);
        }

        close(installFd);

        CFRelease(path);
        CFRelease(options);

        printf("[100%%] Installed package %s\n", app_path);
    }

    if (!debug) exit(0); // no debug phase
    launch_debugger(device, url);
}

void device_callback(struct am_device_notification_callback_info *info, void *arg) {
    switch (info->msg) {
        case ADNCI_MSG_CONNECTED:
            handle_device(info->dev);
        default:
            break;
    }
}

void timeout_callback(CFRunLoopTimerRef timer, void *info) {
    if (!found_device) {
        printf("[....] Timed out waiting for device.\n");
        exit(exitcode_error);
    }
}

void usage(const char* app) {
    printf(
        "Usage: %s [OPTION]...\n"
        "  -d, --debug                  launch the app in GDB after installation\n"
        "  -i, --id <device_id>         the id of the device to connect to\n"
        "  -c, --detect                 only detect if the device is connected\n"
        "  -b, --bundle <bundle.app>    the path to the app bundle to be installed\n"
        "  -a, --args <args>            command line arguments to pass to the app when launching it\n"
        "  -t, --timeout <timeout>      number of seconds to wait for a device to be connected\n"
        "  -u, --unbuffered             don't buffer stdout\n"
        "  -g, --gdbargs <args>         extra arguments to pass to GDB when starting the debugger\n"
        "  -x, --gdbexec <file>         GDB commands script file\n"
        "  -n, --nostart                do not start the app when debugging\n"
        "  -I, --noninteractive         start in non interactive mode (quit when app crashes or exits)\n"
        "  -v, --verbose                enable verbose output\n"
        "  -m, --noinstall              directly start debugging without app install (-d not required)\n"
        "  -p, --port <number>          port used for device, default: 12345 \n"
        "  -V, --version                print the executable version \n",
        app);
}

void show_version() {
	printf("%s\n", APP_VERSION);
}

int main(int argc, char *argv[]) {
    static struct option longopts[] = {
        { "debug", no_argument, NULL, 'd' },
        { "id", required_argument, NULL, 'i' },
        { "bundle", required_argument, NULL, 'b' },
        { "args", required_argument, NULL, 'a' },
        { "verbose", no_argument, NULL, 'v' },
        { "timeout", required_argument, NULL, 't' },
        { "gdbexec", no_argument, NULL, 'x' },
        { "unbuffered", no_argument, NULL, 'u' },
        { "nostart", no_argument, NULL, 'n' },
        { "noninteractive", no_argument, NULL, 'I' },
        { "detect", no_argument, NULL, 'c' },
        { "version", no_argument, NULL, 'V' },
        { "noinstall", no_argument, NULL, 'm' },
        { "port", required_argument, NULL, 'p' },
        { NULL, 0, NULL, 0 },
    };
    char ch;

    while ((ch = getopt_long(argc, argv, "VmcdvunIi:b:a:t:g:x:p:", longopts, NULL)) != -1)
    {
        switch (ch) {
        case 'm':
            install = 0;
            debug = 1;
            break;
        case 'd':
            debug = 1;
            break;
        case 'i':
            device_id = optarg;
            break;
        case 'b':
            app_path = optarg;
            break;
        case 'a':
            args = optarg;
            break;
        case 'v':
            verbose = 1;
            break;
        case 't':
            timeout = atoi(optarg);
            break;
        case 'u':
            unbuffered = 1;
            break;
        case 'n':
            nostart = 1;
            break;
        case 'I':
            interactive = false;
            break;
        case 'c':
            detect_only = true;
            break;
        case 'V':
            show_version();
            return exitcode_error;
        case 'p':
            port = atoi(optarg);
            break;
        default:
            usage(argv[0]);
            return exitcode_error;
        }
    }

    if (!app_path && !detect_only) {
        usage(argv[0]);
        exit(exitcode_error);
    }

    if (unbuffered) {
        setbuf(stdout, NULL);
        setbuf(stderr, NULL);
    }

    if (detect_only && timeout == 0) {
        timeout = 5;
    }

    if (!detect_only) {
        printf("------ Install phase ------\n");
    }

    if (app_path) {
        assert(access(app_path, F_OK) == 0);
    }

    AMDSetLogLevel(5); // otherwise syslog gets flooded with crap
    if (timeout > 0)
    {
        CFRunLoopTimerRef timer = CFRunLoopTimerCreate(NULL, CFAbsoluteTimeGetCurrent() + timeout, 0, 0, 0, timeout_callback, NULL);
        CFRunLoopAddTimer(CFRunLoopGetCurrent(), timer, kCFRunLoopCommonModes);
        printf("[....] Waiting up to %d seconds for iOS device to be connected\n", timeout);
    }
    else
    {
        printf("[....] Waiting for iOS device to be connected\n");
    }

    struct am_device_notification *notify;
    AMDeviceNotificationSubscribe(&device_callback, 0, 0, NULL, &notify);
    CFRunLoopRun();
}