/*****************************************************************************
 * lirc.c : lirc module for vlc
 *****************************************************************************
 * Copyright (C) 2003-2005 the VideoLAN team
 * $Id$
 *
 * Author: Sigmund Augdal Helberg <dnumgis@videolan.org>
 *
 * 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.
 *****************************************************************************/

/*****************************************************************************
 * Preamble
 *****************************************************************************/

#include <errno.h>
#include <fcntl.h>

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#define VLC_MODULE_LICENSE VLC_LICENSE_GPL_2_PLUS
#include <vlc_common.h>
#include <vlc_plugin.h>
#include <vlc_interface.h>
#include <vlc_actions.h>

#ifdef HAVE_POLL
# include <poll.h>
#endif

#include <lirc/lirc_client.h>

#define LIRC_TEXT N_("Change the lirc configuration file")
#define LIRC_LONGTEXT N_( \
    "Tell lirc to read this configuration file. By default it " \
    "searches in the users home directory." )

/*****************************************************************************
 * Module descriptor
 *****************************************************************************/
static int  Open    ( vlc_object_t * );
static void Close   ( vlc_object_t * );

vlc_module_begin ()
    set_shortname( N_("Infrared") )
    set_category( CAT_INTERFACE )
    set_subcategory( SUBCAT_INTERFACE_CONTROL )
    set_description( N_("Infrared remote control interface") )
    set_capability( "interface", 0 )
    set_callbacks( Open, Close )

    add_string( "lirc-file", NULL,
                LIRC_TEXT, LIRC_LONGTEXT, true )
vlc_module_end ()

/*****************************************************************************
 * intf_sys_t: description and status of FB interface
 *****************************************************************************/
struct intf_sys_t
{
    struct lirc_config *config;
    vlc_thread_t thread;
    int i_fd;
};

/*****************************************************************************
 * Local prototypes
 *****************************************************************************/
static void *Run( void * );

static void Process( intf_thread_t * );

/*****************************************************************************
 * Open: initialize interface
 *****************************************************************************/
static int Open( vlc_object_t *p_this )
{
    intf_thread_t *p_intf = (intf_thread_t *)p_this;
    intf_sys_t *p_sys;

    /* Allocate instance and initialize some members */
    p_intf->p_sys = p_sys = malloc( sizeof( intf_sys_t ) );
    if( p_sys == NULL )
        return VLC_ENOMEM;

    p_sys->i_fd = lirc_init( "vlc", 1 );
    if( p_sys->i_fd == -1 )
    {
        msg_Err( p_intf, "lirc initialisation failed" );
        goto error;
    }

    /* We want polling */
    fcntl( p_sys->i_fd, F_SETFL, fcntl( p_sys->i_fd, F_GETFL ) | O_NONBLOCK );

    /* Read the configuration file */
    char *psz_file = var_InheritString( p_intf, "lirc-file" );
    int val = lirc_readconfig( psz_file, &p_sys->config, NULL );
    free( psz_file );
    if( val != 0 )
    {
        msg_Err( p_intf, "failure while reading lirc config" );
        lirc_deinit();
        goto error;
    }

    if( vlc_clone( &p_sys->thread, Run, p_intf, VLC_THREAD_PRIORITY_LOW ) )
    {
        lirc_freeconfig( p_sys->config );
        lirc_deinit();
        goto error;
    }

    return VLC_SUCCESS;

error:
    free( p_sys );
    return VLC_EGENERIC;
}

/*****************************************************************************
 * Close: destroy interface
 *****************************************************************************/
static void Close( vlc_object_t *p_this )
{
    intf_thread_t *p_intf = (intf_thread_t *)p_this;
    intf_sys_t *p_sys = p_intf->p_sys;

    vlc_cancel( p_sys->thread );
    vlc_join( p_sys->thread, NULL );

    /* Destroy structure */
    lirc_freeconfig( p_sys->config );
    lirc_deinit();
    free( p_sys );
}

/*****************************************************************************
 * Run: main loop
 *****************************************************************************/
static void *Run( void *data )
{
    intf_thread_t *p_intf = data;
    intf_sys_t *p_sys = p_intf->p_sys;

    struct pollfd ufd;
    ufd.fd = p_sys->i_fd;
    ufd.events = POLLIN;

    for( ;; )
    {
        /* Wait for data */
        if( poll( &ufd, 1, -1 ) == -1 )
        {
            if( errno == EINTR )
                continue;
            break;
        }

        /* Process */
        int canc = vlc_savecancel();
        Process( p_intf );
        vlc_restorecancel(canc);
    }
    return NULL;
}

static void Process( intf_thread_t *p_intf )
{
    for( ;; )
    {
        char *code, *c;
        if( lirc_nextcode( &code ) )
            return;

        if( code == NULL )
            return;

        while( (lirc_code2char( p_intf->p_sys->config, code, &c ) == 0)
                && (c != NULL) )
        {
            if( !strncmp( "key-", c, 4 ) )
            {
                vlc_action_id_t i_key = vlc_actions_get_id( c );
                if( i_key )
                    var_SetInteger( p_intf->obj.libvlc, "key-action", i_key );
                else
                    msg_Err( p_intf, "Unknown hotkey '%s'", c );
            }
            else
            {
                msg_Err( p_intf, "this doesn't appear to be a valid keycombo "
                                 "lirc sent us. Please look at the "
                                 "doc/lirc/example.lirc file in VLC" );
                break;
            }
        }
        free( code );
    }
}