/*
 * subtitle manager handling.
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 */

/* ***************************** */
/* Includes                      */
/* ***************************** */

#include <stdlib.h>
#include <string.h>

#include "manager.h"
#include "common.h"

/* ***************************** */
/* Makros/Constants              */
/* ***************************** */
#define TRACKWRAP 20

//#define SAM_WITH_DEBUG
#ifdef SAM_WITH_DEBUG
#define SUBTITLE_MGR_DEBUG
#else
#define SUBTITLE_MGR_SILENT
#endif

#ifdef SUBTITLE_MGR_DEBUG

static short debug_level = 20;

#define subtitle_mgr_printf(level, x...) do { \
		if (debug_level >= level) printf(x); } while (0)
#else
#define subtitle_mgr_printf(level, x...)
#endif

#ifndef SUBTITLE_MGR_SILENT
#define subtitle_mgr_err(x...) do { printf(x); } while (0)
#else
#define subtitle_mgr_err(x...)
#endif

/* Error Constants */
#define cERR_SUBTITLE_MGR_NO_ERROR        0
#define cERR_SUBTITLE_MGR_ERROR          -1

static const char FILENAME[] = __FILE__;

/* ***************************** */
/* Types                         */
/* ***************************** */

/* ***************************** */
/* Varaibles                     */
/* ***************************** */

static Track_t *Tracks = NULL;
static int TrackCount = 0;
static int CurrentTrack = -1; //no as default.

/* ***************************** */
/* Prototypes                    */
/* ***************************** */

/* ***************************** */
/* Functions                     */
/* ***************************** */

static int ManagerAdd(Context_t *context, Track_t track)
{
	uint32_t i = 0;
	subtitle_mgr_printf(10, "%s::%s %s %s %d\n", FILENAME, __FUNCTION__, track.Name, track.Encoding, track.Id);
	if (Tracks == NULL)
	{
		Tracks = malloc(sizeof(Track_t) * TRACKWRAP);
		for (i = 0; i < TRACKWRAP; ++i)
		{
			Tracks[i].Id = -1;
		}
	}
	if (Tracks == NULL)
	{
		subtitle_mgr_err("%s:%s malloc failed\n", FILENAME, __FUNCTION__);
		return cERR_SUBTITLE_MGR_ERROR;
	}
	for (i = 0; i < TRACKWRAP; ++i)
	{
		if (Tracks[i].Id == track.Id)
		{
			Tracks[i].pending = 0;
			return cERR_SUBTITLE_MGR_NO_ERROR;
		}
	}
	if (TrackCount < TRACKWRAP)
	{
		copyTrack(&Tracks[TrackCount], &track);
		TrackCount++;
	}
	else
	{
		subtitle_mgr_err("%s:%s TrackCount out if range %d - %d\n", FILENAME, __FUNCTION__, TrackCount, TRACKWRAP);
		return cERR_SUBTITLE_MGR_ERROR;
	}
	if (TrackCount > 0)
	{
		context->playback->isSubtitle = 1;
	}
	subtitle_mgr_printf(10, "%s::%s\n", FILENAME, __FUNCTION__);
	return cERR_SUBTITLE_MGR_NO_ERROR;
}

static TrackDescription_t *ManagerList(Context_t  *context __attribute__((unused)))
{
	int i = 0;
	TrackDescription_t *tracklist = NULL;
	subtitle_mgr_printf(10, "%s::%s\n", FILENAME, __FUNCTION__);
	if (Tracks != NULL)
	{
		tracklist = malloc(sizeof(TrackDescription_t) * ((TrackCount) + 1));
		if (tracklist == NULL)
		{
			subtitle_mgr_err("%s:%s malloc failed\n", FILENAME, __FUNCTION__);
			return NULL;
		}
		int j = 0;
		for (i = 0; i < TrackCount; ++i)
		{
			if (Tracks[i].pending || Tracks[i].Id < 0)
			{
				continue;
			}
			tracklist[j].Id = Tracks[i].Id;
			tracklist[j].Name = strdup(Tracks[i].Name);
			tracklist[j].Encoding = strdup(Tracks[i].Encoding);
			++j;
		}
		tracklist[j].Id = -1;
	}
	return tracklist;
}

static int32_t ManagerDel(Context_t *context, int32_t onlycurrent)
{
	uint32_t i = 0;
	subtitle_mgr_printf(10, "%s::%s\n", FILENAME, __FUNCTION__);
	if (onlycurrent == 0)
	{
		if (Tracks != NULL)
		{
			for (i = 0; i < TrackCount; i++)
			{
				freeTrack(&Tracks[i]);
			}
			free(Tracks);
			Tracks = NULL;
		}
		else
		{
			subtitle_mgr_err("%s::%s nothing to delete!\n", FILENAME, __FUNCTION__);
			return cERR_SUBTITLE_MGR_ERROR;
		}
		TrackCount = 0;
		context->playback->isSubtitle = 0;
	}
	CurrentTrack = -1;
	subtitle_mgr_printf(10, "%s::%s return no error\n", FILENAME, __FUNCTION__);
	return cERR_SUBTITLE_MGR_NO_ERROR;
}

static int32_t Command(void  *_context, ManagerCmd_t command, void *argument)
{
	Context_t  *context = (Context_t *) _context;
	int32_t ret = cERR_SUBTITLE_MGR_NO_ERROR;
	subtitle_mgr_printf(50, "%s::%s %d\n", FILENAME, __FUNCTION__, command);
	switch (command)
	{
		case MANAGER_ADD:
		{
			Track_t *track = argument;
			ret = ManagerAdd(context, *track);
			break;
		}
		case MANAGER_LIST:
		{
			container_ffmpeg_update_tracks(context, context->playback->uri, 0);
			*((char ** *)argument) = (char **)ManagerList(context);
			break;
		}
		case MANAGER_GET:
		{
			if (TrackCount > 0 && CurrentTrack >= 0)
			{
				*((int *)argument) = (int)Tracks[CurrentTrack].Id;
			}
			else
			{
				*((int *)argument) = (int) - 1;
			}
			break;
		}
		case MANAGER_GET_TRACK_DESC:
		{
			if ((TrackCount > 0) && (CurrentTrack >= 0))
			{
				TrackDescription_t *track =  malloc(sizeof(TrackDescription_t));
				*((TrackDescription_t **)argument) = track;
				if (track)
				{
					memset(track, 0, sizeof(TrackDescription_t));
					track->Id       = Tracks[CurrentTrack].Id;
					track->Name     = strdup(Tracks[CurrentTrack].Name);
					track->Encoding = strdup(Tracks[CurrentTrack].Encoding);
				}
			}
			else
			{
				*((TrackDescription_t **)argument) = NULL;
			}
			break;
		}
		case MANAGER_GET_TRACK:
		{
			if ((TrackCount > 0) && (CurrentTrack >= 0))
			{
				*((Track_t **)argument) = (Track_t *) &Tracks[CurrentTrack];
			}
			else
			{
				*((Track_t **)argument) = NULL;
			}
			break;
		}
		case MANAGER_GETENCODING:
		{
			if (TrackCount > 0 && CurrentTrack >= 0)
			{
				*((char **)argument) = (char *)strdup(Tracks[CurrentTrack].Encoding);
			}
			else
			{
				*((char **)argument) = (char *)strdup("");
			}
			break;
		}
		case MANAGER_GETNAME:
		{
			if (TrackCount > 0 && CurrentTrack >= 0)
			{
				*((char **)argument) = (char *)strdup(Tracks[CurrentTrack].Name);
			}
			else
			{
				*((char **)argument) = (char *)strdup("");
			}
			break;
		}
		case MANAGER_SET:
		{
			uint32_t i = 0;
			int32_t requestedTrackId = *((int *)argument);
			subtitle_mgr_printf(20, "%s::%s MANAGER_SET id=%d\n", FILENAME, __FUNCTION__, *((int *)argument));
			if (requestedTrackId == -1)
			{
				// track id -1 mean disable subtitle
				CurrentTrack = -1;
				break;
			}
			for (i = 0; i < TrackCount; ++i)
			{
				if (Tracks[i].Id == requestedTrackId)
				{
					CurrentTrack = i;
					break;
				}
			}
			if (i == TrackCount)
			{
				subtitle_mgr_err("%s::%s track id %d unknown\n", FILENAME, __FUNCTION__, *((int *)argument));
				ret = cERR_SUBTITLE_MGR_ERROR;
			}
			break;
		}
		case MANAGER_DEL:
		{
			if (argument == NULL)
			{
				ret = ManagerDel(context, 0);
			}
			else
			{
				ret = ManagerDel(context, *((int *)argument));
			}
			break;
		}
		case MANAGER_INIT_UPDATE:
		{
			uint32_t i;
			for (i = 0; i < TrackCount; i++)
			{
				Tracks[i].pending = 1;
			}
			break;
		}
		default:
			subtitle_mgr_err("%s:%s: ConatinerCmd not supported!", FILENAME, __FUNCTION__);
			ret = cERR_SUBTITLE_MGR_ERROR;
			break;
	}
	subtitle_mgr_printf(50, "%s:%s: returning %d\n", FILENAME, __FUNCTION__, ret);
	return ret;
}

Manager_t SubtitleManager =
{
	"Subtitle",
	&Command,
	NULL
};