/*
 * @author Artur Duque de Souza <souza.artur@indt.org.br>
 *
 * This program 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; 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.
 *
 m * You should have received a copy of the GNU Lesser 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
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <sys/socket.h> /* for socket(), connect(), send(), and recv() */
#include <arpa/inet.h>  /* for sockaddr_in and inet_addr() */
#include <stdlib.h>     /* for atoi() and exit() */
#include <string.h>     /* for memset() */
#include <unistd.h>     /* for close() */
#include <errno.h>

#include <glib.h>
#include <glib/gprintf.h>
#include <glib/gstdio.h>
#include <gmyth-stream-client.h>

#include <libgnomevfs/gnome-vfs-module.h>
#include <libgnomevfs/gnome-vfs-utils.h>

#define BUFFER_SIZE 4096

typedef struct {
    gint port;
    gchar* hostname;

    GMythStreamClient *stream;
    gint fd;
} gmsHandle;

typedef struct {
    gchar *file_name;
    gchar *mux;
    gchar *vcodec;
    guint vbitrate;
    gdouble fps;
    gchar *acodec;
    guint abitrate;
    guint width;
    guint height;
    guint port;
    gchar *opt;
} UriArgs;


static gmsHandle* gmsHandle_new(GnomeVFSURI *uri);

static GnomeVFSResult
do_open (GnomeVFSMethod        *method,
	 GnomeVFSMethodHandle **method_handle,
	 GnomeVFSURI           *uri,
	 GnomeVFSOpenMode       mode,
	 GnomeVFSContext       *context);

static GnomeVFSResult
do_read (GnomeVFSMethod       *method,
	 GnomeVFSMethodHandle *method_handle,
	 gpointer              buffer,
	 GnomeVFSFileSize      bytes,
	 GnomeVFSFileSize     *bytes_read,
	 GnomeVFSContext      *context);

static GnomeVFSResult
do_close (GnomeVFSMethod * method,
          GnomeVFSMethodHandle * method_handle,
          GnomeVFSContext * context);

static GnomeVFSResult
do_get_file_info (GnomeVFSMethod * method,
		  GnomeVFSURI * uri,
		  GnomeVFSFileInfo * file_info,
		  GnomeVFSFileInfoOptions options,
		  GnomeVFSContext * context);


static GnomeVFSResult
do_get_file_info_from_handle (GnomeVFSMethod 		*method,
                              GnomeVFSMethodHandle 	*method_handle,
                              GnomeVFSFileInfo 		*file_info,
                              GnomeVFSFileInfoOptions    options,
                              GnomeVFSContext 		*context);


static gboolean
do_is_local (GnomeVFSMethod * method, const GnomeVFSURI * uri);


static gmsHandle* gmsHandle_new(GnomeVFSURI *uri)
{
    gmsHandle* handler = (gmsHandle*)g_malloc0(sizeof(gmsHandle));

    handler->hostname = (gchar*)gnome_vfs_uri_get_host_name(uri);
    handler->port = gnome_vfs_uri_get_host_port(uri);
    handler->stream = gmyth_stream_client_new ();

    return handler;
}

static GnomeVFSMethod method = {
    sizeof (GnomeVFSMethod),
    do_open,                       /* open */
    NULL,                          /* create */
    do_close,                      /* close */
    do_read,                       /* read */
    NULL,                          /* write */
    NULL,                          /* seek */
    NULL,                          /* tell */
    NULL,                          /* truncate_handle */
    NULL,                          /* open_directory */
    NULL,                          /* close_directory */
    NULL,                          /* read_directory */
    do_get_file_info,              /* get_file_info */
    do_get_file_info_from_handle,  /* get_file_info_from_handle */
    do_is_local,                   /* is_local */
    NULL,                          /* make_directory */
    NULL,                          /* remove_directory */
    NULL,                          /* move */
    NULL,                          /* unlink */
    NULL,                          /* check_same_fs */
    NULL,                          /* set_file_info */
    NULL,                          /* truncate */
    NULL,                          /* find_directory */
    NULL,                          /* create_symbolic_link */
    NULL,                          /* monitor_add */
    NULL,                          /* monitor_cancel */
    NULL                           /* file_control */
};

GnomeVFSMethod *
vfs_module_init (const char *method_name, const char *args)
{
    return &method;
}

void
vfs_module_shutdown (GnomeVFSMethod* method)
{
    return;
}

char* _parse_opt(char* opt)
{
    char** list = g_strsplit(opt, "opt=", 2);
    char** opts = g_strsplit(list[1], "+", 32);
    char* value = "";
    char* aux;
    gint i = 0;

    for (aux = opts[0]; aux != NULL; aux = opts[++i])
        value = g_strdup_printf("%s %s", value, aux);

    g_free(aux);
    g_strfreev(list);
    g_strfreev(opts);
    return value;
}

static UriArgs *
_uri_parse_args (const GnomeVFSURI *uri)
{
    gchar *file = gnome_vfs_unescape_string (uri->text, NULL);

    gchar **list = g_strsplit(file, "\'", 3);
    gchar **prefix = g_strsplit_set(list[0], "/=", 3);
    gchar **lst = g_strsplit (list[2], "?", 0);

    UriArgs *info = g_new0 (UriArgs, 1);
    gint i = 1;

    gchar** prop = NULL;
    prop = g_strsplit_set(lst[0], "/=", 3);

    info->file_name = g_strdup_printf ("%s://%s",\
                                       prefix[1],list[1]);

    //g_debug("FILENAME: [%s]", info->file_name);

    g_strfreev(prop);

    gchar* walk;
    for (walk = lst[1]; walk != NULL; walk = lst[++i])
    {
        prop = g_strsplit(walk, "=", 2);

        if (g_strv_length (prop) == 2) {
            if (strcmp (prop[0], "mux") == 0) {
                info->mux = g_strdup (prop[1]);
            } else if (strcmp (prop[0], "vcodec") == 0) {
                info->vcodec = g_strdup (prop[1]);
            } else if (strcmp (prop[0], "vbitrate") == 0) {
                info->vbitrate = atoi (prop[1]);
            } else if (strcmp (prop[0], "fps") == 0) {
                info->fps = g_strtod (prop[1], NULL);
            } else if (strcmp (prop[0], "acodec") == 0) {
                info->acodec = g_strdup (prop[1]);
            } else if (strcmp (prop[0], "abitrate") == 0) {
                info->abitrate = atoi (prop[1]);
            } else if (strcmp (prop[0], "width") == 0) {
                info->width = atoi (prop[1]);
            } else if (strcmp (prop[0], "height") == 0) {
                info->height = atoi (prop[1]);
            } else if (strcmp (prop[0], "opt") == 0) {
                info->opt = g_strdup (_parse_opt(walk));
            }
        }
        g_strfreev (prop);
    }

    g_free (file);
    g_strfreev (list);
    g_strfreev (prefix);
    g_strfreev (lst);
    return info;
}

static GnomeVFSResult
do_open (GnomeVFSMethod        *method,
	 GnomeVFSMethodHandle **method_handle,
	 GnomeVFSURI           *uri,
	 GnomeVFSOpenMode       mode,
	 GnomeVFSContext       *context)
{
    gmsHandle *handle = gmsHandle_new(uri);
    UriArgs *args;

    if (!gmyth_stream_client_connect (handle->stream,
                                      gnome_vfs_uri_get_host_name  (uri),
                                      gnome_vfs_uri_get_host_port  (uri))) {

        return GNOME_VFS_ERROR_HOST_NOT_FOUND;
    }

    args = _uri_parse_args (uri);

    gint ret = gmyth_stream_client_open_stream (handle->stream,
                                                args->file_name,
                                                args->mux,
                                                args->vcodec,
                                                args->vbitrate,
                                                args->fps,
                                                args->acodec,
                                                args->abitrate,
                                                args->width,
                                                args->height,
                                                args->opt);

    g_free (args);

    if (ret == -1) {
        gmyth_stream_client_disconnect (handle->stream);
        return GNOME_VFS_ERROR_HOST_NOT_FOUND;
    }

    handle->fd = gmyth_stream_client_play_stream (handle->stream);

    if (handle->fd == -1) {
        gmyth_stream_client_disconnect (handle->stream);
        return GNOME_VFS_ERROR_HOST_NOT_FOUND;
    }

    *method_handle = (GnomeVFSMethodHandle *) handle;
    return GNOME_VFS_OK;
}

static GnomeVFSResult
do_read (GnomeVFSMethod       *method,
	 GnomeVFSMethodHandle *method_handle,
	 gpointer              buffer,
	 GnomeVFSFileSize      bytes,
	 GnomeVFSFileSize     *bytes_read,
	 GnomeVFSContext      *context)
{

    gint64 total_read = 0;
    gmsHandle *handle = (gmsHandle *) method_handle;

    //g_debug("waiting something");

    total_read = recv(handle->fd, buffer, BUFFER_SIZE, 0);
    //g_debug("COULD READ: %d bytes", total_read);
    *bytes_read = (GnomeVFSFileSize) total_read;

    //if (total_read < 0) g_debug("ERROR!!!!!!!!!!!!!!!!");

    if (total_read < 0) return GNOME_VFS_ERROR_INTERNAL;
    else return GNOME_VFS_OK;

}

static GnomeVFSResult
do_close (GnomeVFSMethod * method,
          GnomeVFSMethodHandle * method_handle,
          GnomeVFSContext * context)
{
    gmsHandle *handle = (gmsHandle *) method_handle;

    g_debug("close close close");

    gmyth_stream_client_close_stream (handle->stream);
    gmyth_stream_client_disconnect (handle->stream);

    g_free(handle);
    return GNOME_VFS_OK;
}


static GnomeVFSResult
do_get_file_info (GnomeVFSMethod * method,
		  GnomeVFSURI * uri,
		  GnomeVFSFileInfo * file_info,
		  GnomeVFSFileInfoOptions options,
		  GnomeVFSContext * context)
{
    file_info->valid_fields = GNOME_VFS_FILE_INFO_FIELDS_TYPE |
        GNOME_VFS_FILE_INFO_FIELDS_PERMISSIONS;

    file_info->type = GNOME_VFS_FILE_TYPE_SOCKET;

    file_info->permissions = GNOME_VFS_PERM_USER_READ |
        GNOME_VFS_PERM_OTHER_READ |
        GNOME_VFS_PERM_GROUP_READ;

    return GNOME_VFS_OK;
}


static GnomeVFSResult
do_get_file_info_from_handle (GnomeVFSMethod 		*method,
                              GnomeVFSMethodHandle 	*method_handle,
                              GnomeVFSFileInfo 		*file_info,
                              GnomeVFSFileInfoOptions    options,
                              GnomeVFSContext 		*context)
{
    file_info->valid_fields = GNOME_VFS_FILE_INFO_FIELDS_TYPE |
        GNOME_VFS_FILE_INFO_FIELDS_PERMISSIONS;

    file_info->type = GNOME_VFS_FILE_TYPE_SOCKET;

    file_info->permissions = GNOME_VFS_PERM_USER_READ |
        GNOME_VFS_PERM_OTHER_READ |
        GNOME_VFS_PERM_GROUP_READ;

    return GNOME_VFS_OK;
}


static gboolean
do_is_local (GnomeVFSMethod * method, const GnomeVFSURI * uri)
{
    return FALSE;
}