/*
 * Copyright (C) 2010-2012 Carl Hetherington <carl@carlh.net>
 * Copyright (C) 2010-2016 Paul Davis <paul@linuxaudiosystems.com>
 * Copyright (C) 2015-2016 Robin Gareus <robin@gareus.org>
 * Copyright (C) 2015 Tim Mayberry <mojofunk@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include <cstring>
#include <cstdio>
#include <cstdlib>
#include <iostream>
#include <map>
#include <vector>
#include <algorithm>

#include <boost/tokenizer.hpp>

#include "pbd/debug.h"
#include "pbd/error.h"
#include "pbd/pthread_utils.h"

#include "pbd/i18n.h"

using namespace std;
using PBD::DebugBits;

static uint64_t _debug_bit = 0;

typedef std::map<const char*,DebugBits> DebugMap;

namespace PBD {
	DebugMap & _debug_bit_map()
	{
		static DebugMap map;
		return map;
	}
}

DebugBits PBD::DEBUG::Stateful = PBD::new_debug_bit ("stateful");
DebugBits PBD::DEBUG::Properties = PBD::new_debug_bit ("properties");
DebugBits PBD::DEBUG::FileManager = PBD::new_debug_bit ("filemanager");
DebugBits PBD::DEBUG::Pool = PBD::new_debug_bit ("pool");
DebugBits PBD::DEBUG::EventLoop = PBD::new_debug_bit ("eventloop");
DebugBits PBD::DEBUG::AbstractUI = PBD::new_debug_bit ("abstractui");
DebugBits PBD::DEBUG::FileUtils = PBD::new_debug_bit ("fileutils");
DebugBits PBD::DEBUG::Configuration = PBD::new_debug_bit ("configuration");
DebugBits PBD::DEBUG::UndoHistory = PBD::new_debug_bit ("undohistory");
DebugBits PBD::DEBUG::Timing = PBD::new_debug_bit ("timing");
DebugBits PBD::DEBUG::Threads = PBD::new_debug_bit ("threads");
DebugBits PBD::DEBUG::ThreadName = PBD::new_debug_bit ("threadname");
DebugBits PBD::DEBUG::Locale = PBD::new_debug_bit ("locale");
DebugBits PBD::DEBUG::StringConvert = PBD::new_debug_bit ("stringconvert");
DebugBits PBD::DEBUG::DebugTimestamps = PBD::new_debug_bit ("debugtimestamps");
DebugBits PBD::DEBUG::DebugLogToGUI = PBD::new_debug_bit ("debuglogtogui");

/* These are debug bits that are used by backends. Since these are loaded dynamically,
   after command-line parsing, defining them in code that is part of the backend
   doesn't make them available for command line parsing. Put them here.

   This is sort of a hack, because it means that the debug bits aren't defined
   with the code in which they are relevant. But providing access to debug bits
   from dynamically loaded code, for use in command line parsing, is way above the pay grade
   of this debug tracing scheme.
*/
DebugBits PBD::DEBUG::WavesMIDI = PBD::new_debug_bit ("WavesMIDI");
DebugBits PBD::DEBUG::WavesAudio = PBD::new_debug_bit ("WavesAudio");

DebugBits PBD::debug_bits;

DebugBits
PBD::new_debug_bit (const char* name)
{
	DebugBits ret;
	DebugMap::iterator i =_debug_bit_map().find (name);

	if (i != _debug_bit_map().end()) {
		return i->second;
	}

	if (_debug_bit >= debug_bits.size()) {
		cerr << "Too many debug bits defined, offender was " << name << endl;
		abort (); /*NOTREACHED*/
	}

	ret.set (_debug_bit++, 1);
	_debug_bit_map().insert (make_pair (name, ret));
        return ret;
}

void
PBD::debug_only_print (const char* prefix, string str)
{
	if ((PBD::debug_bits & DEBUG::ThreadName).any()) {
		printf ("0x%lx (%s) ", (intptr_t) DEBUG_THREAD_SELF, pthread_name());
	}

	if ((PBD::debug_bits & DEBUG::DebugTimestamps).any()) {
		printf ("%ld %s: %s", g_get_monotonic_time(), prefix, str.c_str());
	} else {
		printf ("%s: %s", prefix, str.c_str());
	}
}

void
PBD::debug_print (const char* prefix, string str)
{
	debug_only_print (prefix, str);

	if ((PBD::debug_bits & DEBUG::DebugLogToGUI).any()) {
		std::replace (str.begin (), str.end (), '\n', ' ');
		debug << prefix << ": "  << str << endmsg;
	}
}

int
PBD::parse_debug_options (const char* str)
{
	string in_str = str;
	typedef boost::tokenizer<boost::char_separator<char> > tokenizer;
	boost::char_separator<char> sep (",");
	tokenizer tokens (in_str, sep);

	for (tokenizer::iterator tok_iter = tokens.begin(); tok_iter != tokens.end(); ++tok_iter) {
		if (*tok_iter == "list") {
			list_debug_options ();
			return 1;
		}

		if (*tok_iter == "all") {
			debug_bits.set (); /* sets all bits */
			return 0;
		}

		for (map<const char*,DebugBits>::iterator i = _debug_bit_map().begin(); i != _debug_bit_map().end(); ++i) {
			const char* cstr = (*tok_iter).c_str();

			if (strncasecmp (cstr, i->first, strlen (cstr)) == 0) {
				debug_bits |= i->second;
				cout << string_compose (X_("Debug flag '%1' set\n"), i->first);
			}
		}
	}

	return 0;
}

void
PBD::list_debug_options ()
{
	cout << _("The following debug options are available. Separate multiple options with commas.\nNames are case-insensitive and can be abbreviated.") << endl << endl;
	cout << '\t' << X_("all") << endl;

	vector<string> options;

	for (map<const char*,DebugBits>::iterator i = _debug_bit_map().begin(); i != _debug_bit_map().end(); ++i) {
		options.push_back (i->first);
        }

	sort (options.begin(), options.end());

	for (vector<string>::iterator i = options.begin(); i != options.end(); ++i) {
                cout << "\t" << (*i) << endl;
	}
}