/* ncmpc (Ncurses MPD Client)
 * (c) 2004-2009 The Music Player Daemon Project
 * Project homepage: http://musicpd.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.
*/

#include "config.h"
#include "ncmpc.h"
#include "mpdclient.h"
#include "charset.h"
#include "options.h"
#include "command.h"
#include "ncu.h"
#include "screen.h"
#include "screen_utils.h"
#include "strfsong.h"
#include "i18n.h"

#ifndef NCMPC_MINI
#include "conf.h"
#endif

#ifdef ENABLE_LYRICS_SCREEN
#include "lyrics.h"
#endif

#ifdef ENABLE_LIRC
#include "lirc.h"
#endif

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

#ifdef ENABLE_LOCALE
#include <locale.h>
#endif

/* time between mpd updates [s] */
static const guint update_interval = 500;

#define BUFSIZE 1024

static const guint idle_interval = 500;

static mpdclient_t *mpd = NULL;
static gboolean connected = FALSE;
static GMainLoop *main_loop;
static guint reconnect_source_id, idle_source_id, update_source_id;

static const gchar *
error_msg(const gchar *msg)
{
	gchar *p;

	if ((p = strchr(msg, '}')) == NULL)
		return msg;

	do {
		p++;
	} while (*p == '}' || * p== ' ');

	return p;
}

static void
error_callback(G_GNUC_UNUSED mpdclient_t *c, gint error, const gchar *_msg)
{
	char *msg = utf8_to_locale(_msg);

	error = error & 0xFF;
	switch (error) {
	case MPD_ERROR_CONNPORT:
	case MPD_ERROR_NORESPONSE:
		break;
	case MPD_ERROR_ACK:
		screen_status_printf("%s", error_msg(msg));
		screen_bell();
		break;
	default:
		screen_status_printf("%s", msg);
		screen_bell();
		doupdate();
		connected = FALSE;
	}

	g_free(msg);
}

#ifndef NCMPC_MINI
static void
update_xterm_title(void)
{
	static char title[BUFSIZE];
	char tmp[BUFSIZE];
	mpd_Status *status = NULL;
	mpd_Song *song = NULL;

	if (mpd) {
		status = mpd->status;
		song = mpd->song;
	}

	if (options.xterm_title_format && status && song &&
	    IS_PLAYING(status->state))
		strfsong(tmp, BUFSIZE, options.xterm_title_format, song);
	else
		g_strlcpy(tmp, PACKAGE " version " VERSION, BUFSIZE);

	if (strncmp(title, tmp, BUFSIZE)) {
		g_strlcpy(title, tmp, BUFSIZE);
		set_xterm_title("%s", title);
	}
}
#endif

static void
exit_and_cleanup(void)
{
	screen_exit();
#ifndef NCMPC_MINI
	set_xterm_title("");
#endif
	printf("\n");

	if (mpd) {
		mpdclient_disconnect(mpd);
		mpdclient_free(mpd);
	}

	g_free(options.host);
	g_free(options.password);
	g_free(options.list_format);
	g_free(options.status_format);
#ifndef NCMPC_MINI
	g_free(options.scroll_sep);
#endif
}

static void
catch_sigint(G_GNUC_UNUSED int sig)
{
	g_main_loop_quit(main_loop);
}


static void
catch_sigcont(G_GNUC_UNUSED int sig)
{
	screen_resize(mpd);
}

void
sigstop(void)
{
  def_prog_mode();  /* save the tty modes */
  endwin();         /* end curses mode temporarily */
  kill(0, SIGSTOP); /* issue SIGSTOP */
}

static guint timer_sigwinch_id;

static gboolean
timer_sigwinch(G_GNUC_UNUSED gpointer data)
{
	/* the following causes the screen to flicker.  There might be
	   better solutions, but I believe it isn't all that
	   important. */

	endwin();
	refresh();
	screen_resize(mpd);

	return FALSE;
}

static void
catch_sigwinch(G_GNUC_UNUSED int sig)
{
	if (timer_sigwinch_id != 0)
		g_source_remove(timer_sigwinch_id);

	timer_sigwinch_id = g_timeout_add(100, timer_sigwinch, NULL);
}

static gboolean
timer_mpd_update(gpointer data);

/**
 * This timer is installed when the connection to the MPD server is
 * broken.  It tries to recover by reconnecting periodically.
 */
static gboolean
timer_reconnect(G_GNUC_UNUSED gpointer data)
{
	int ret;

	if (connected)
		return FALSE;

	screen_status_printf(_("Connecting to %s...  [Press %s to abort]"),
			     options.host, get_key_names(CMD_QUIT,0) );
	doupdate();

	mpdclient_disconnect(mpd);
	ret = mpdclient_connect(mpd,
				options.host, options.port,
				1.5,
				options.password);
	if (ret != 0) {
		/* try again in 5 seconds */
		g_timeout_add(5000, timer_reconnect, NULL);
		return FALSE;
	}

#ifndef NCMPC_MINI
	/* quit if mpd is pre 0.11.0 - song id not supported by mpd */
	if (MPD_VERSION_LT(mpd, 0, 11, 0)) {
		screen_status_printf(_("Error: MPD version %d.%d.%d is to old (%s needed)"),
				     mpd->connection->version[0],
				     mpd->connection->version[1],
				     mpd->connection->version[2],
				     "0.11.0");
		mpdclient_disconnect(mpd);
		doupdate();

		/* try again after 30 seconds */
		g_timeout_add(30000, timer_reconnect, NULL);
		return FALSE;
	}
#endif

	screen_status_printf(_("Connected to %s"), options.host);
	doupdate();

	connected = TRUE;

	/* update immediately */
	g_timeout_add(1, timer_mpd_update, GINT_TO_POINTER(FALSE));

	reconnect_source_id = 0;
	return FALSE;

}

static gboolean
timer_mpd_update(gpointer data)
{
	if (connected)
		mpdclient_update(mpd);
	else if (reconnect_source_id == 0)
		reconnect_source_id = g_timeout_add(1000, timer_reconnect,
						    NULL);

#ifndef NCMPC_MINI
	if (options.enable_xterm_title)
		update_xterm_title();
#endif

	screen_update(mpd);

	return GPOINTER_TO_INT(data);
}

/**
 * This idle timer is invoked when the user hasn't typed a key for
 * 500ms.  It is used for delayed seeking.
 */
static gboolean
timer_idle(G_GNUC_UNUSED gpointer data)
{
	screen_idle(mpd);
	return TRUE;
}

void begin_input_event(void)
{
	/* remove the idle timeout; add it later with fresh interval */
	g_source_remove(idle_source_id);
}

void end_input_event(void)
{
	screen_update(mpd);

	idle_source_id = g_timeout_add(idle_interval, timer_idle, NULL);
}

int do_input_event(command_t cmd)
{
	if (cmd == CMD_QUIT) {
		g_main_loop_quit(main_loop);
		return -1;
	}

	screen_cmd(mpd, cmd);

	if (cmd == CMD_VOLUME_UP || cmd == CMD_VOLUME_DOWN) {
		/* make sure we dont update the volume yet */
		g_source_remove(update_source_id);
		update_source_id = g_timeout_add(update_interval,
						 timer_mpd_update,
						 GINT_TO_POINTER(TRUE));
	}

	return 0;
}

static gboolean
keyboard_event(G_GNUC_UNUSED GIOChannel *source,
	       G_GNUC_UNUSED GIOCondition condition,
	       G_GNUC_UNUSED gpointer data)
{
	command_t cmd;

	begin_input_event();

	if ((cmd=get_keyboard_command()) != CMD_NONE)
		if (do_input_event(cmd) != 0)
			return FALSE;

	end_input_event();
	return TRUE;
}

#ifndef NCMPC_MINI
/**
 * Check the configured key bindings for errors, and display a status
 * message every 10 seconds.
 */
static gboolean
timer_check_key_bindings(G_GNUC_UNUSED gpointer data)
{
	char buf[256];
	gboolean key_error;

	key_error = check_key_bindings(NULL, buf, sizeof(buf));
	if (!key_error)
		/* no error: disable this timer for the rest of this
		   process */
		return FALSE;

	screen_status_printf("%s", buf);
	doupdate();
	return TRUE;
}
#endif

int
main(int argc, const char *argv[])
{
	struct sigaction act;
#ifdef ENABLE_LOCALE
	const char *charset = NULL;
#endif
	GIOChannel *keyboard_channel;
#ifdef ENABLE_LIRC
	int lirc_socket;
	GIOChannel *lirc_channel = NULL;
#endif

#ifdef ENABLE_LOCALE
	/* time and date formatting */
	setlocale(LC_TIME,"");
	/* care about sorting order etc */
	setlocale(LC_COLLATE,"");
	/* charset */
	setlocale(LC_CTYPE,"");
	/* initialize charset conversions */
	charset = charset_init();

	/* initialize i18n support */
#endif

#ifdef ENABLE_NLS
	setlocale(LC_MESSAGES, "");
	bindtextdomain(GETTEXT_PACKAGE, LOCALE_DIR);
#ifdef ENABLE_LOCALE
	bind_textdomain_codeset(GETTEXT_PACKAGE, charset);
#endif
	textdomain(GETTEXT_PACKAGE);
#endif

	/* initialize options */
	options_init();

	/* parse command line options - 1 pass get configuration files */
	options_parse(argc, argv);

#ifndef NCMPC_MINI
	/* read configuration */
	read_configuration();

	/* check key bindings */
	check_key_bindings(NULL, NULL, 0);
#endif

	/* parse command line options - 2 pass */
	options_parse(argc, argv);

	/* setup signal behavior - SIGINT */
	sigemptyset(&act.sa_mask);
	act.sa_flags = 0;
	act.sa_handler = catch_sigint;
	if (sigaction(SIGINT, &act, NULL) < 0) {
		perror("signal");
		exit(EXIT_FAILURE);
	}

	/* setup signal behavior - SIGTERM */

	act.sa_handler = catch_sigint;
	if (sigaction(SIGTERM, &act, NULL) < 0) {
		perror("sigaction()");
		exit(EXIT_FAILURE);
	}

	/* setup signal behavior - SIGCONT */

	act.sa_handler = catch_sigcont;
	if (sigaction(SIGCONT, &act, NULL) < 0) {
		perror("sigaction(SIGCONT)");
		exit(EXIT_FAILURE);
	}

	/* setup signal behaviour - SIGHUP*/

	act.sa_handler = catch_sigint;
	if (sigaction(SIGHUP, &act, NULL) < 0) {
		perror("sigaction(SIGHUP)");
		exit(EXIT_FAILURE);
	}

	/* setup SIGWINCH */

	act.sa_flags = SA_RESTART;
	act.sa_handler = catch_sigwinch;
	if (sigaction(SIGWINCH, &act, NULL) < 0) {
		perror("sigaction(SIGWINCH)");
		exit(EXIT_FAILURE);
	}

	/* ignore SIGPIPE */

	act.sa_handler = SIG_IGN;
	if (sigaction(SIGPIPE, &act, NULL) < 0) {
		perror("sigaction(SIGPIPE)");
		exit(EXIT_FAILURE);
	}

	ncu_init();

#ifdef ENABLE_LYRICS_SCREEN
	lyrics_init();
#endif

	/* create mpdclient instance */
	mpd = mpdclient_new();
	mpdclient_install_error_callback(mpd, error_callback);

	/* initialize curses */
	screen_init(mpd);

	/* the main loop */
	main_loop = g_main_loop_new(NULL, FALSE);

	/* watch out for keyboard input */
	keyboard_channel = g_io_channel_unix_new(STDIN_FILENO);
	g_io_add_watch(keyboard_channel, G_IO_IN, keyboard_event, NULL);

#ifdef ENABLE_LIRC
	/* watch out for lirc input */
	lirc_socket = ncmpc_lirc_open();
	if (lirc_socket >= 0) {
		lirc_channel = g_io_channel_unix_new(lirc_socket);
		g_io_add_watch(lirc_channel, G_IO_IN, lirc_event, NULL);
	}
#endif

	/* attempt to connect */
	reconnect_source_id = g_timeout_add(1, timer_reconnect, NULL);

	update_source_id = g_timeout_add(update_interval,
					 timer_mpd_update,
					 GINT_TO_POINTER(TRUE));
#ifndef NCMPC_MINI
	g_timeout_add(10000, timer_check_key_bindings, NULL);
#endif
	idle_source_id = g_timeout_add(idle_interval, timer_idle, NULL);

	screen_paint(mpd);

	g_main_loop_run(main_loop);

	/* cleanup */

	g_main_loop_unref(main_loop);
	g_io_channel_unref(keyboard_channel);

#ifdef ENABLE_LIRC
	if (lirc_socket >= 0)
		g_io_channel_unref(lirc_channel);
	ncmpc_lirc_close();
#endif

	exit_and_cleanup();

#ifdef ENABLE_LYRICS_SCREEN
	lyrics_deinit();
#endif

	ncu_deinit();

	return 0;
}