#!/data/data/com.termux/files/usr/bin/bash
set -e -u

SCRIPTNAME=termux-media-player

show_usage () {
    echo "Usage: $SCRIPTNAME cmd [args]"
    echo;
    echo -e "help        Shows this help"
    echo -e "info        Displays current playback information"
    echo -e "play        Resumes playback if paused"
    echo -e "play <file> Plays specified media file"
    echo -e "pause       Pauses playback"
    echo -e "stop        Quits playback"
    echo;
    echo "--NOTE--"
    echo "To playback media files they must reside in a publicly"
    echo "accessible directory, such as /storage."
    echo "Otherwise, they will fail to load!"
    echo
    echo "**Run 'termux-setup-storage' before using!**"
    echo;
}

if [ $# = 0 ]; then
    show_usage
    exit 1
fi

# Params we're sending to MediaPlayerAPI
PARAMS=""

play_media () {
    if [ $# -gt 1 ]; then
    	echo "Error! play only takes one argument which is the name of file to play"
	exit 1
    # If no arguments, we should resume the last played media file if it exists
    elif [ $# -eq 0 ]; then
	PARAMS="-a resume"
    else
	# Make sure we actually receive a file
	if [ ! -f $1 ]; then
	    echo "Error: Not a file!"
	    exit 1
	else
	    local file=$(readlink -q -f $1)
	    local PATTERN='.3gp|.flac|.mkv|.mp3|.ogg|.wav$'

	    # Ensure that file is a supported media file
	    if ! ls $file | grep -E $PATTERN -q; then
		echo "Error: File is not a valid media file!"
		exit 1
	    else
		PARAMS="-a play --es file $file"
	    fi
	fi
    fi
}

media_info () {
    if [ $# -ne 0 ]; then
	echo "Error! info takes no arguments!"
	exit 1
    fi
    PARAMS="-a info"
}

pause_media () {
    if [ $# -ne 0 ]; then
	echo "Error! pause takes no arguments!"
	exit 1
    fi
    PARAMS="-a pause"
}

stop_media () {
    if [ $# -ne 0 ]; then
	echo "Error! stop takes no arguments!"
	exit 1
    fi
    PARAMS="-a stop"
}

# Get command and command args
while [ $# -gt 0 ]; do
    # MediaPlayer command
    cmd=$1

    # Command arguments
    arg_array=( $@ );
    cmd_args=${arg_array[@]:1}

    # Find correct command and execute w/ args
    case $cmd in
	"play" ) play_media $cmd_args; break ;;
	"info" ) media_info $cmd_args; break ;;
	"pause" ) pause_media $cmd_args; break ;;
	"stop" ) stop_media $cmd_args; break ;;
	"help" | * ) echo "$SCRIPTNAME: Invalid cmd: $cmd"; show_usage; exit 1 ;;
    esac
done

/data/data/com.termux/files/usr/libexec/termux-api MediaPlayer $PARAMS