/**
 * @file llappviewermacosx.cpp
 * @brief The LLAppViewerMacOSX class definitions
 *
 * $LicenseInfo:firstyear=2007&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 * 
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */ 

#include "llviewerprecompiledheaders.h"

#if !defined LL_DARWIN
	#error "Use only with Mac OS X"
#endif

#define LL_CARBON_CRASH_HANDLER 1

#include "llwindowmacosx.h"
#include "llappviewermacosx-objc.h"

#include "llappviewermacosx.h"
#include "llwindowmacosx-objc.h"
#include "llcommandlineparser.h"

#include "llviewernetwork.h"
#include "llviewercontrol.h"
#include "llmd5.h"
#include "llfloaterworldmap.h"
#include "llurldispatcher.h"
#include <ApplicationServices/ApplicationServices.h>
#ifdef LL_CARBON_CRASH_HANDLER
#include <Carbon/Carbon.h>
#endif
#include <vector>
#include <exception>

#include "lldir.h"
#include <signal.h>
#include <CoreAudio/CoreAudio.h>	// for systemwide mute
class LLMediaCtrl;		// for LLURLDispatcher

namespace 
{
	// The command line args stored.
	// They are not used immediately by the app.
	int gArgC;
	char** gArgV;
	LLAppViewerMacOSX* gViewerAppPtr = NULL;

    void (*gOldTerminateHandler)() = NULL;
    std::string gHandleSLURL;
}

static void exceptionTerminateHandler()
{
	// reinstall default terminate() handler in case we re-terminate.
	if (gOldTerminateHandler) std::set_terminate(gOldTerminateHandler);
	// treat this like a regular viewer crash, with nice stacktrace etc.
    long *null_ptr;
    null_ptr = 0;
    *null_ptr = 0xDEADBEEF; //Force an exception that will trigger breakpad.
	//LLAppViewer::handleViewerCrash();
	// we've probably been killed-off before now, but...
	gOldTerminateHandler(); // call old terminate() handler
}

bool initViewer()
{
	// Set the working dir to <bundle>/Contents/Resources
	if (chdir(gDirUtilp->getAppRODataDir().c_str()) == -1)
	{
		LL_WARNS() << "Could not change directory to "
				<< gDirUtilp->getAppRODataDir() << ": " << strerror(errno)
				<< LL_ENDL;
	}

	gViewerAppPtr = new LLAppViewerMacOSX();

    // install unexpected exception handler
	gOldTerminateHandler = std::set_terminate(exceptionTerminateHandler);

	gViewerAppPtr->setErrorHandler(LLAppViewer::handleViewerCrash);

	
	bool ok = gViewerAppPtr->init();
	if(!ok)
	{
		LL_WARNS() << "Application init failed." << LL_ENDL;
	}
    else if (!gHandleSLURL.empty())
    {
        dispatchUrl(gHandleSLURL);
        gHandleSLURL = "";
    }
	return ok;
}

void handleQuit()
{
	LLAppViewer::instance()->userQuit();
}

// This function is called pumpMainLoop() rather than runMainLoop() because
// it passes control to the viewer's main-loop logic for a single frame. Like
// LLAppViewer::frame(), it returns 'true' when it's done. Until then, it
// expects to be called again by the timer in LLAppDelegate
// (llappdelegate-objc.mm).
bool pumpMainLoop()
{
	bool ret = LLApp::isQuitting();
	if (!ret && gViewerAppPtr != NULL)
	{
		ret = gViewerAppPtr->frame();
	} else {
		ret = true;
	}
	
	return ret;
}

void cleanupViewer()
{
	if(!LLApp::isError())
	{
        if (gViewerAppPtr)
            gViewerAppPtr->cleanup();
	}
	
	delete gViewerAppPtr;
	gViewerAppPtr = NULL;
}

int main( int argc, char **argv ) 
{
	// Store off the command line args for use later.
	gArgC = argc;
	gArgV = argv;
	return createNSApp(argc, (const char**)argv);
}

LLAppViewerMacOSX::LLAppViewerMacOSX()
{
}

LLAppViewerMacOSX::~LLAppViewerMacOSX()
{
}

bool LLAppViewerMacOSX::init()
{
	bool success = LLAppViewer::init();
    
#if LL_SEND_CRASH_REPORTS
    if (success)
    {
        LLAppViewer* pApp = LLAppViewer::instance();
        pApp->initCrashReporting();
    }
#endif
    
    return success;
}

// MacOSX may add and addition command line arguement for the process serial number.
// The option takes a form like '-psn_0_12345'. The following method should be able to recognize
// and either ignore or return a pair of values for the option.
// look for this method to be added to the parser in parseAndStoreResults.
std::pair<std::string, std::string> parse_psn(const std::string& s)
{
    if (s.find("-psn_") == 0) 
	{
		// *FIX:Mani Not sure that the value makes sense.
		// fix it once the actual -psn_XXX syntax is known.
		return std::make_pair("psn", s.substr(5));
    }
	else 
	{
        return std::make_pair(std::string(), std::string());
    }
}

bool LLAppViewerMacOSX::initParseCommandLine(LLCommandLineParser& clp)
{
	// The next two lines add the support for parsing the mac -psn_XXX arg.
	clp.addOptionDesc("psn", NULL, 1, "MacOSX process serial number");
	clp.setCustomParser(parse_psn);

	// parse the user's command line
	if(clp.parseCommandLine(gArgC, gArgV) == false)
	{
		return false;
	}

	// Get the user's preferred language string based on the Mac OS localization mechanism.
	// To add a new localization:
		// go to the "Resources" section of the project
		// get info on "language.txt"
		// in the "General" tab, click the "Add Localization" button
		// create a new localization for the language you're adding
		// set the contents of the new localization of the file to the string corresponding to our localization
		//   (i.e. "en", "ja", etc.  Use the existing ones as a guide.)
	CFURLRef url = CFBundleCopyResourceURL(CFBundleGetMainBundle(), CFSTR("language"), CFSTR("txt"), NULL);
	char path[MAX_PATH];
	if(CFURLGetFileSystemRepresentation(url, false, (UInt8 *)path, sizeof(path)))
	{
		std::string lang;
		if(_read_file_into_string(lang, path))		/* Flawfinder: ignore*/
		{
            LLControlVariable* c = gSavedSettings.getControl("SystemLanguage");
            if(c)
            {
                c->setValue(lang, false);
            }
		}
	}
	CFRelease(url);
	
    return true;
}

// *FIX:Mani It would be nice to provide a clean interface to get the
// default_unix_signal_handler for the LLApp class.
extern void default_unix_signal_handler(int, siginfo_t *, void *);
bool LLAppViewerMacOSX::restoreErrorTrap()
{
	// This method intends to reinstate signal handlers.
	// *NOTE:Mani It was found that the first execution of a shader was overriding
	// our initial signal handlers somehow.
	// This method will be called (at least) once per mainloop execution.
	// *NOTE:Mani The signals used below are copied over from the 
	// setup_signals() func in LLApp.cpp
	// LLApp could use some way of overriding that func, but for this viewer
	// fix I opt to avoid affecting the server code.
	
	// Set up signal handlers that may result in program termination
	//
	struct sigaction act;
	struct sigaction old_act;
	act.sa_sigaction = default_unix_signal_handler;
	sigemptyset( &act.sa_mask );
	act.sa_flags = SA_SIGINFO;
	
	unsigned int reset_count = 0;
	
#define SET_SIG(S) 	sigaction(SIGABRT, &act, &old_act); \
					if(act.sa_sigaction != old_act.sa_sigaction) \
						++reset_count;
	// Synchronous signals
	SET_SIG(SIGABRT)
	SET_SIG(SIGALRM)
	SET_SIG(SIGBUS)
	SET_SIG(SIGFPE)
	SET_SIG(SIGHUP) 
	SET_SIG(SIGILL)
	SET_SIG(SIGPIPE)
	SET_SIG(SIGSEGV)
	SET_SIG(SIGSYS)
	
	SET_SIG(LL_HEARTBEAT_SIGNAL)
	SET_SIG(LL_SMACKDOWN_SIGNAL)
	
	// Asynchronous signals that are normally ignored
	SET_SIG(SIGCHLD)
	SET_SIG(SIGUSR2)
	
	// Asynchronous signals that result in attempted graceful exit
	SET_SIG(SIGHUP)
	SET_SIG(SIGTERM)
	SET_SIG(SIGINT)
	
	// Asynchronous signals that result in core
	SET_SIG(SIGQUIT)	
#undef SET_SIG
	
	return reset_count == 0;
}

void LLAppViewerMacOSX::initCrashReporting(bool reportFreeze)
{
	std::string command_str = "mac-crash-logger.app";
    
    std::stringstream pid_str;
    pid_str <<  LLApp::getPid();
    std::string logdir = gDirUtilp->getExpandedFilename(LL_PATH_DUMP, "");
    std::string appname = gDirUtilp->getExecutableFilename();
    std::string str[] = { "-pid", pid_str.str(), "-dumpdir", logdir, "-procname", appname.c_str() };
    std::vector< std::string > args( str, str + ( sizeof ( str ) /  sizeof ( std::string ) ) );
    LL_WARNS() << "about to launch mac-crash-logger" << pid_str.str()
               << " " << logdir << " " << appname << LL_ENDL;
    launchApplication(&command_str, &args);
}

std::string LLAppViewerMacOSX::generateSerialNumber()
{
	char serial_md5[MD5HEX_STR_SIZE];		// Flawfinder: ignore
	serial_md5[0] = 0;

	// JC: Sample code from http://developer.apple.com/technotes/tn/tn1103.html
	CFStringRef serialNumber = NULL;
	io_service_t    platformExpert = IOServiceGetMatchingService(kIOMasterPortDefault,
																 IOServiceMatching("IOPlatformExpertDevice"));
	if (platformExpert) {
		serialNumber = (CFStringRef) IORegistryEntryCreateCFProperty(platformExpert,
																	 CFSTR(kIOPlatformSerialNumberKey),
																	 kCFAllocatorDefault, 0);		
		IOObjectRelease(platformExpert);
	}
	
	if (serialNumber)
	{
		char buffer[MAX_STRING];		// Flawfinder: ignore
		if (CFStringGetCString(serialNumber, buffer, MAX_STRING, kCFStringEncodingASCII))
		{
			LLMD5 md5( (unsigned char*)buffer );
			md5.hex_digest(serial_md5);
		}
		CFRelease(serialNumber);
	}

	return serial_md5;
}

void handleUrl(const char* url_utf8)
{
    if (url_utf8 && gViewerAppPtr)
    {
        gHandleSLURL = "";
        dispatchUrl(url_utf8);
    }
    else if (url_utf8)
    {
        gHandleSLURL = url_utf8;
    }
}

void dispatchUrl(std::string url)
{
    // Safari 3.2 silently mangles secondlife:///app/ URLs into
    // secondlife:/app/ (only one leading slash).
    // Fix them up to meet the URL specification. JC
    const std::string prefix = "secondlife:/app/";
    std::string test_prefix = url.substr(0, prefix.length());
    LLStringUtil::toLower(test_prefix);
    if (test_prefix == prefix)
    {
        url.replace(0, prefix.length(), "secondlife:///app/");
    }
    
    LLMediaCtrl* web = NULL;
    const bool trusted_browser = false;
    LLURLDispatcher::dispatch(url, "", web, trusted_browser);
}