#!/bin/sh
# RPCD backend for Lyrion Music Server LuCI app

. /lib/functions.sh

CONFIG="lyrion"

json_init() { echo "{"; }
json_close() { echo "}"; }
json_add_string() { echo "\"$1\": \"$2\""; }
json_add_int() { echo "\"$1\": $2"; }
json_add_bool() { [ "$2" = "1" ] && echo "\"$1\": true" || echo "\"$1\": false"; }

uci_get() { uci -q get ${CONFIG}.main.$1; }
uci_set() { uci set ${CONFIG}.main.$1="$2" && uci commit ${CONFIG}; }

# Get service status
get_status() {
	local enabled=$(uci_get enabled)
	local runtime=$(uci_get runtime)
	local port=$(uci_get port)
	local data_path=$(uci_get data_path)
	local media_path=$(uci_get media_path)
	local memory_limit=$(uci_get memory_limit)
	local image=$(uci_get image)

	# Check if service is running
	local running=0
	local container_status="stopped"

	if command -v lxc-info >/dev/null 2>&1; then
		if lxc-info -n lyrion -s 2>/dev/null | grep -q "RUNNING"; then
			running=1
			container_status="running"
		fi
	elif command -v docker >/dev/null 2>&1; then
		if docker ps --filter "name=secbx-lyrion" --format "{{.Names}}" 2>/dev/null | grep -q "secbx-lyrion"; then
			running=1
			container_status="running"
		fi
	fi

	# Check if installed (LXC rootfs or Docker image exists)
	local installed=0
	if [ -d "/srv/lxc/lyrion/rootfs" ] && [ -f "/srv/lxc/lyrion/rootfs/opt/lyrion/slimserver.pl" ]; then
		installed=1
	elif command -v docker >/dev/null 2>&1 && docker images --format "{{.Repository}}" 2>/dev/null | grep -q "lyrionmusicserver"; then
		installed=1
	fi

	# Detect runtime
	local detected_runtime="none"
	if command -v lxc-start >/dev/null 2>&1; then
		detected_runtime="lxc"
	elif command -v docker >/dev/null 2>&1; then
		detected_runtime="docker"
	fi

	# Check web UI accessibility
	local web_accessible=0
	if [ "$running" = "1" ]; then
		wget -q -O /dev/null --timeout=2 "http://127.0.0.1:${port:-9000}/" 2>/dev/null && web_accessible=1
	fi

	cat <<EOF
{
	"enabled": $([ "$enabled" = "1" ] && echo "true" || echo "false"),
	"running": $([ "$running" = "1" ] && echo "true" || echo "false"),
	"installed": $([ "$installed" = "1" ] && echo "true" || echo "false"),
	"container_status": "$container_status",
	"runtime": "${runtime:-auto}",
	"detected_runtime": "$detected_runtime",
	"port": ${port:-9000},
	"data_path": "${data_path:-/srv/lyrion}",
	"media_path": "${media_path:-/srv/media}",
	"memory_limit": "${memory_limit:-256M}",
	"image": "${image:-ghcr.io/lms-community/lyrionmusicserver:stable}",
	"web_accessible": $([ "$web_accessible" = "1" ] && echo "true" || echo "false"),
	"web_url": "http://192.168.255.1:${port:-9000}"
}
EOF
}

# Get configuration
get_config() {
	local enabled=$(uci_get enabled)
	local runtime=$(uci_get runtime)
	local port=$(uci_get port)
	local data_path=$(uci_get data_path)
	local media_path=$(uci_get media_path)
	local memory_limit=$(uci_get memory_limit)
	local timezone=$(uci_get timezone)
	local image=$(uci_get image)

	cat <<EOF
{
	"enabled": "${enabled:-0}",
	"runtime": "${runtime:-auto}",
	"port": "${port:-9000}",
	"data_path": "${data_path:-/srv/lyrion}",
	"media_path": "${media_path:-/srv/media}",
	"memory_limit": "${memory_limit:-256M}",
	"timezone": "${timezone:-UTC}",
	"image": "${image:-ghcr.io/lms-community/lyrionmusicserver:stable}"
}
EOF
}

# Save configuration
save_config() {
	local input
	read -r input

	local runtime=$(echo "$input" | jsonfilter -e '@.runtime' 2>/dev/null)
	local port=$(echo "$input" | jsonfilter -e '@.port' 2>/dev/null)
	local data_path=$(echo "$input" | jsonfilter -e '@.data_path' 2>/dev/null)
	local media_path=$(echo "$input" | jsonfilter -e '@.media_path' 2>/dev/null)
	local memory_limit=$(echo "$input" | jsonfilter -e '@.memory_limit' 2>/dev/null)
	local timezone=$(echo "$input" | jsonfilter -e '@.timezone' 2>/dev/null)

	[ -n "$runtime" ] && uci_set runtime "$runtime"
	[ -n "$port" ] && uci_set port "$port"
	[ -n "$data_path" ] && uci_set data_path "$data_path"
	[ -n "$media_path" ] && uci_set media_path "$media_path"
	[ -n "$memory_limit" ] && uci_set memory_limit "$memory_limit"
	[ -n "$timezone" ] && uci_set timezone "$timezone"

	echo '{"success": true}'
}

# Install Lyrion
do_install() {
	if command -v lyrionctl >/dev/null 2>&1; then
		lyrionctl install >/tmp/lyrion-install.log 2>&1 &
		echo '{"success": true, "message": "Installation started in background"}'
	else
		echo '{"success": false, "error": "lyrionctl not found"}'
	fi
}

# Start service
do_start() {
	if [ -x /etc/init.d/lyrion ]; then
		/etc/init.d/lyrion start >/dev/null 2>&1
		uci_set enabled '1'
		echo '{"success": true}'
	else
		echo '{"success": false, "error": "Service not installed"}'
	fi
}

# Stop service
do_stop() {
	if [ -x /etc/init.d/lyrion ]; then
		/etc/init.d/lyrion stop >/dev/null 2>&1
		echo '{"success": true}'
	else
		echo '{"success": false, "error": "Service not installed"}'
	fi
}

# Restart service
do_restart() {
	if [ -x /etc/init.d/lyrion ]; then
		/etc/init.d/lyrion restart >/dev/null 2>&1
		echo '{"success": true}'
	else
		echo '{"success": false, "error": "Service not installed"}'
	fi
}

# Update container
do_update() {
	if command -v lyrionctl >/dev/null 2>&1; then
		lyrionctl update >/tmp/lyrion-update.log 2>&1 &
		echo '{"success": true, "message": "Update started in background"}'
	else
		echo '{"success": false, "error": "lyrionctl not found"}'
	fi
}

# Get logs
get_logs() {
	local lines=50
	local log_content=""

	if [ -f /srv/lxc/lyrion/rootfs/var/log/lyrion/server.log ]; then
		log_content=$(tail -n $lines /srv/lxc/lyrion/rootfs/var/log/lyrion/server.log 2>/dev/null | sed 's/"/\\"/g' | tr '\n' '|')
	elif [ -f /tmp/lyrion-install.log ]; then
		log_content=$(tail -n $lines /tmp/lyrion-install.log 2>/dev/null | sed 's/"/\\"/g' | tr '\n' '|')
	fi

	echo "{\"logs\": \"$log_content\"}"
}

# RPCD list method
list_methods() {
	cat <<'EOF'
{
	"status": {},
	"get_config": {},
	"save_config": {"runtime": "string", "port": "string", "data_path": "string", "media_path": "string", "memory_limit": "string", "timezone": "string"},
	"install": {},
	"start": {},
	"stop": {},
	"restart": {},
	"update": {},
	"logs": {}
}
EOF
}

# Main entry point
case "$1" in
	list)
		list_methods
		;;
	call)
		case "$2" in
			status)      get_status ;;
			get_config)  get_config ;;
			save_config) save_config ;;
			install)     do_install ;;
			start)       do_start ;;
			stop)        do_stop ;;
			restart)     do_restart ;;
			update)      do_update ;;
			logs)        get_logs ;;
			*)           echo '{"error": "Unknown method"}' ;;
		esac
		;;
	*)
		echo '{"error": "Unknown command"}'
		;;
esac