#!/bin/bash
# SHOW: STREAM LIVE
# Streams show live from input/ALSA


# Includes and Declarations (global variables, formatting, and functions)
source "${APPLICATION_ROOT}/scripts/system/system-functions"
source "${APPLICATION_ROOT}/scripts/system/system-declarations"


# Get active config name, construct path to streamable config file (for validation)
CURRENTLY_ACTIVE_CONFIG_NAME=$(<"$CONFIG_FILE_IDENTIFIER_PATH")
STREAMABLE_CONFIG_FILE_PATH="$CONFIG_DIRECTORY/config-$CURRENTLY_ACTIVE_CONFIG_NAME.json"


# Check if config file exists
if [[ -f "$STREAMABLE_CONFIG_FILE_PATH" ]]; 
	
	# If exists
	then

		# Parse JSON config file for each crucial streaming variable
		v1='main_host'
			MAIN_HOST=$(sed -e s/'[ \t]*\"\"\:\"'// -e s/'".*'// <<< $(sed -n "s/$v1//p" $STREAMABLE_CONFIG_FILE_PATH))
		v2='main_port'
			MAIN_PORT=$(sed -e s/'[ \t]*\"\"\:\"'// -e s/'".*'// <<< $(sed -n "s/$v2//p" $STREAMABLE_CONFIG_FILE_PATH))
		v3='main_user'
			MAIN_USER=$(sed -e s/'[ \t]*\"\"\:\"'// -e s/'".*'// <<< $(sed -n "s/$v3//p" $STREAMABLE_CONFIG_FILE_PATH))
		v4='main_password'
			MAIN_PASSWORD=$(sed -e s/'[ \t]*\"\"\:\"'// -e s/'".*'// <<< $(sed -n "s/$v4//p" $STREAMABLE_CONFIG_FILE_PATH))
		v5='main_mount'
			MAIN_MOUNT=$(sed -e s/'[ \t]*\"\"\:\"'// -e s/'".*'// <<< $(sed -n "s/$v5//p" $STREAMABLE_CONFIG_FILE_PATH))
		v6='playlist_url'
			PLAYLIST_URL=$(sed -e s/'[ \t]*\"\"\:\"'// -e s/'".*'// <<< $(sed -n "s/$v6//p" $STREAMABLE_CONFIG_FILE_PATH))
		v7='randomize_playlist_files'
			RANDOMIZE_PLAYLIST_FILES=$(sed -e s/'[ \t]*\"\"\:\"'// -e s/'".*'// <<< $(sed -n "s/$v7//p" $STREAMABLE_CONFIG_FILE_PATH))
		v8='hardware_audio_frame_size'
			HARDWARE_AUDIO_FRAME_SIZE=$(sed -e s/'[ \t]*\"\"\:\"'// -e s/'".*'// <<< $(sed -n "s/$v8//p" $STREAMABLE_CONFIG_FILE_PATH))

		# Parse JSON config file for each metadata streaming variable
		v9='main_metadata_artist'
			MAIN_METADATA_ARTIST=$(sed -e s/'[ \t]*\"\"\:\"'// -e s/'".*'// <<< $(sed -n "s/$v9//p" $STREAMABLE_CONFIG_FILE_PATH))
			# MAIN_METADATA_ARTIST="${MAIN_METADATA_ARTIST// /\+}"
		vA='main_metadata_title'
			MAIN_METADATA_TITLE=$(sed -e s/'[ \t]*\"\"\:\"'// -e s/'".*'// <<< $(sed -n "s/$vA//p" $STREAMABLE_CONFIG_FILE_PATH))
			# MAIN_METADATA_TITLE="${MAIN_METADATA_TITLE// /\+}"



		# Ensure all configuration files are not blank
		if [ -z "${MAIN_HOST}" ] || [ -z "${MAIN_PORT}" ] || [ -z "${MAIN_USER}" ] || [ -z "${MAIN_PASSWORD}" ] || [ -z "${MAIN_MOUNT}" ] || [ -z "${PLAYLIST_URL}" ] || [ -z "${RANDOMIZE_PLAYLIST_FILES}" ] || [ -z "${HARDWARE_AUDIO_FRAME_SIZE}" ]
		then

			# Fault if config variable is blank
			error_message "[L] Stream ALSA (to Main): Streaming failed. Please check your configuration settings.";
			echo ""

		else

			# Notice of Execution
			confirmation_message "${COLOR_GREEN}[L] Stream ALSA (to Main):${COLOR_DEFAULT}";


			# Encode and Submit Metadata Change (Hack: two requests to get changes to take)
			CONVERTED_MAIN_METADATA_TITLE=$(url_encode_string "$MAIN_METADATA_TITLE")
			CONVERTED_MAIN_METADATA_ARTIST=$(url_encode_string "$MAIN_METADATA_ARTIST")
			curl "http://$MAIN_USER:$MAIN_PASSWORD@$MAIN_HOST:$MAIN_PORT/admin/metadata?mode=updinfo&mount=/&title='$CONVERTED_MAIN_METADATA_TITLE'&artist='$CONVERTED_MAIN_METADATA_ARTIST'"
			sleep 5
			curl "http://$MAIN_USER:$MAIN_PASSWORD@$MAIN_HOST:$MAIN_PORT/admin/metadata?mode=updinfo&mount=/&title='$CONVERTED_MAIN_METADATA_TITLE'&artist='$CONVERTED_MAIN_METADATA_ARTIST'"


			# Liquidsoap Log
			echo -e "\n"
			echo -e "\n"
			echo -e "${COLOR_LIGHT_MAGENTA}${FONT_BOLD}[STARTING LIQUIDSOAP]${FONT_DEFAULT}${COLOR_DEFAULT}\n"
			echo -e "${COLOR_MAGENTA}"

			
			# Launch Liquidsoap using variables
			# liquidsoap 'set("frame.audio.size",'$HARDWARE_AUDIO_FRAME_SIZE'); output.icecast(%mp3,host="'$MAIN_HOST'",port='$MAIN_PORT',user="'$MAIN_USER'",password="'$MAIN_PASSWORD'",mount="'$MAIN_MOUNT'",mksafe(playlist.once(random='$MAIN_RANDOMIZE_PLAYLIST_FILES',on_done=shutdown,"'$PLAYLIST_URL'")))';
			liquidsoap '
			set("frame.audio.size",'$HARDWARE_AUDIO_FRAME_SIZE'); 
			
			stream_master_source = output.icecast(
				%mp3(bitrate=192,samplerate=44100),
				host="'$MAIN_HOST'",
				port='$MAIN_PORT',
				user="'$MAIN_USER'",
				password="'$MAIN_PASSWORD'",
				mount="'$MAIN_MOUNT'",
				input.alsa(bufferize = true)	
			)

			stream_master_source
			'

			printf ${COLOR_DEFAULT}
				printf "${COLOR_LIGHT_MAGENTA}${FONT_BOLD}[EXITING LIQUIDSOAP]${FONT_DEFAULT}${COLOR_DEFAULT}\n"
			printf "\n"
			printf "\n"
			printf "\n"
			

		fi


    # If no config file exists    
	else	
		error_message "[L] Stream ALSA (to Main): No config file specified. To stream, please assign a config."
		echo ""

fi