/* Copyright (C) 2022 kichikuou <KichikuouChrome@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, see <http://gnu.org/licenses/>.
 */

#include <stdlib.h>

#include "system4/string.h"

#include "audio.h"
#include "hll.h"
#include "xsystem4.h"

static int channel = -1;

static bool SoundFilePlayer_Load(struct string *file_name)
{
	if (channel >= 0)
		bgm_unprepare(channel);

	channel = bgm_get_unused_channel();
	char *path = unix_path(file_name->text);
	if (!bgm_prepare_from_file(channel, path)) {
		WARNING("Cannot load %s", display_utf0(path));
		channel = -1;
	}
	free(path);
	return channel >= 0;
}

static void SoundFilePlayer_Release(void)
{
	if (channel >= 0) {
		bgm_unprepare(channel);
		channel = -1;
	}
}

static bool SoundFilePlayer_Play(int play_count)
{
	if (channel < 0)
		return false;
	bgm_set_loop_count(channel, play_count);
	bgm_play(channel);
	return true;
}

static bool SoundFilePlayer_Stop(void)
{
	if (channel < 0)
		return false;
	bgm_stop(channel);
	return true;
}

static bool SoundFilePlayer_IsPlay(void)
{
	return channel >= 0 && bgm_is_playing(channel);
}

static int SoundFilePlayer_GetDuration(void)
{
	return channel >= 0 ? bgm_get_length(channel) : 0;
}

static int SoundFilePlayer_GetPosition(void)
{
	return channel >= 0 ? bgm_get_pos(channel) : 0;
}

static bool SoundFilePlayer_BeginFadeVolume(int volume, int time)
{
	if (channel < 0)
		return false;
	bgm_fade(channel, time, volume, false);
	return true;
}

static bool SoundFilePlayer_StopFadeVolume(void)
{
	if (channel < 0)
		return false;
	bgm_stop_fade(channel);
	return true;
}

static bool SoundFilePlayer_IsFadeVolume(void)
{
	return channel >= 0 && bgm_is_fading(channel);
}

HLL_QUIET_UNIMPLEMENTED(true, bool, SoundFilePlayer, Update, void);

HLL_LIBRARY(SoundFilePlayer,
	    HLL_EXPORT(Load, SoundFilePlayer_Load),
	    HLL_EXPORT(Release, SoundFilePlayer_Release),
	    HLL_EXPORT(Play, SoundFilePlayer_Play),
	    HLL_EXPORT(Stop, SoundFilePlayer_Stop),
	    HLL_EXPORT(IsPlay, SoundFilePlayer_IsPlay),
	    HLL_EXPORT(GetDuration, SoundFilePlayer_GetDuration),
	    HLL_EXPORT(GetPosition, SoundFilePlayer_GetPosition),
	    HLL_EXPORT(BeginFadeVolume, SoundFilePlayer_BeginFadeVolume),
	    HLL_EXPORT(StopFadeVolume, SoundFilePlayer_StopFadeVolume),
	    HLL_EXPORT(IsFadeVolume, SoundFilePlayer_IsFadeVolume),
	    HLL_EXPORT(Update, SoundFilePlayer_Update)
	    );