#!/bin/bash

# load shell lib
. $(dirname $BASH_SOURCE)/lib4a-tools.sh

function usage() {
	log "$0 <file> [device] [role]"
	log "    - 'device' can be hw:X where X is a number or the device name."
	log "      It can also be hw:X,Y,Z, it is used when playing on the loopback card"
	log "      which is the 4a default sink."
	log "      Default: hw:Loopback,0,2"
	log "    - 'role' is the 4a role to use. In future version it will be guessed"
	log "      based on the device. Use '4a-api roles' to get a list of known roles"
	log "      Default: multimedia"
}

if [ "$#" == "0" ]; then
	error "No file to play!"
	usage
fi

avirt=$(cat /proc/modules | grep avirt_ap_loopback | head -n1 | cut -d ' ' -f 1)
if [ x$avirt == x ]; then
hwdev=Loopback,0,2
else
hwdev=avirt,0
fi

FILEPATH="$( realpath "$1" )"
DEVICE=${2:-"hw:$hwdev"}
ROLE=${3:-'multimedia'}

CARDID=$( echo "$DEVICE" | cut -d':' -f2 | cut -d',' -f1 )

log "Play '$FILEPATH' on '$DEVICE'"

LOOPBACK_CARDID=$( LANG="C" aplay -l | grep -oEe "^card\\s+[0-9]: Loopback" | uniq | grep -oEe "[0-9]+" )
if [ "$CARDID" == "Loopback" ] || [ "$CARDID" == "$LOOPBACK_CARDID" ]; then
	IS_4A_DEVICE=1
else
	IS_4A_DEVICE=0
fi

if [ "$IS_4A_DEVICE" == "1" ]; then
	log "The selected card (hw:$CARDID) is handle by 4a, call open on '$ROLE'"
	4a-client ahl-4a "$ROLE" '{ "action": "open" }'

	# BUG: afb-client-demo does not exit an exit code different from zero when api return an error
	#if [ "$?" -ne "0" ]; then
	#	exit -1
	#fi
fi

if [ "$DEBUG" == "1" ]; then
	gst-launch-1.0 -v uridecodebin uri="file://$FILEPATH" ! audioconvert ! audioresample ! alsasink device="$DEVICE"
else
	gst-launch-1.0 -v uridecodebin uri="file://$FILEPATH" ! audioconvert ! audioresample ! alsasink device="$DEVICE" > /dev/null
fi

if [ "$IS_4A_DEVICE" == "1" ]; then
	log "The selected card (hw;$CARDID) is handled by 4a, call close on '$ROLE'"
	4a-client ahl-4a "$ROLE" '{ "action": "close" }'
fi