#!/bin/sh
# Factory Mesh Services - Aggregated service discovery across mesh
# CGI endpoint for distributed service panel

echo "Content-Type: application/json"
echo "Access-Control-Allow-Origin: *"
echo "Access-Control-Allow-Methods: GET, OPTIONS"
echo ""

# Handle CORS preflight
if [ "$REQUEST_METHOD" = "OPTIONS" ]; then
	exit 0
fi

# Get local node ID
P2P_STATE_DIR="/var/run/secubox-p2p"
LOCAL_NODE_ID=$(cat "$P2P_STATE_DIR/node.id" 2>/dev/null || hostname)
LOCAL_NODE_NAME=$(uci -q get system.@system[0].hostname || hostname)

# Get local services
get_local_services() {
	local services_json=$(/usr/sbin/secubox-p2p services 2>/dev/null)
	if [ -z "$services_json" ]; then
		echo '{"services":[]}'
		return
	fi
	echo "$services_json"
}

# Get services from a peer
get_peer_services() {
	local peer_addr="$1"
	local peer_name="$2"

	# Query peer's services endpoint with timeout
	local peer_services=$(curl -s --connect-timeout 3 --max-time 5 "http://$peer_addr:7331/api/services" 2>/dev/null)

	if [ -n "$peer_services" ] && echo "$peer_services" | grep -q "services"; then
		echo "$peer_services"
	else
		echo '{"services":[],"error":"unreachable"}'
	fi
}

# Build aggregated mesh services
build_mesh_services() {
	local result='{"nodes":['
	local first_node=1

	# Add local node
	local local_services=$(get_local_services)
	local local_svc_list=$(echo "$local_services" | jsonfilter -e '@.services[*]' 2>/dev/null)
	local local_svc_count=$(echo "$local_services" | jsonfilter -e '@.services[*]' 2>/dev/null | wc -l)

	result="$result{\"node_id\":\"$LOCAL_NODE_ID\",\"node_name\":\"$LOCAL_NODE_NAME\",\"is_local\":true,\"status\":\"online\","
	result="$result\"services\":["

	local i=0
	while [ $i -lt $local_svc_count ]; do
		local svc_name=$(echo "$local_services" | jsonfilter -e "@.services[$i].name" 2>/dev/null)
		local svc_status=$(echo "$local_services" | jsonfilter -e "@.services[$i].status" 2>/dev/null)
		local svc_enabled=$(echo "$local_services" | jsonfilter -e "@.services[$i].enabled" 2>/dev/null)
		local svc_port=$(echo "$local_services" | jsonfilter -e "@.services[$i].port" 2>/dev/null)

		[ $i -gt 0 ] && result="$result,"
		result="$result{\"name\":\"$svc_name\",\"status\":\"$svc_status\",\"enabled\":$svc_enabled,\"port\":\"$svc_port\"}"
		i=$((i + 1))
	done

	result="$result]}"
	first_node=0

	# Get peer services
	local peers_file="/tmp/secubox-p2p-peers.json"
	if [ -f "$peers_file" ]; then
		local peer_count=$(jsonfilter -i "$peers_file" -e '@.peers[*]' 2>/dev/null | wc -l)
		local p=0

		while [ $p -lt $peer_count ]; do
			local peer_addr=$(jsonfilter -i "$peers_file" -e "@.peers[$p].address" 2>/dev/null)
			local peer_name=$(jsonfilter -i "$peers_file" -e "@.peers[$p].name" 2>/dev/null)
			local peer_id=$(jsonfilter -i "$peers_file" -e "@.peers[$p].id" 2>/dev/null)
			local is_local=$(jsonfilter -i "$peers_file" -e "@.peers[$p].is_local" 2>/dev/null)

			# Skip local node in peers list
			if [ "$is_local" != "true" ] && [ -n "$peer_addr" ]; then
				local peer_services=$(get_peer_services "$peer_addr" "$peer_name")
				local peer_status="offline"
				local peer_error=""

				if echo "$peer_services" | grep -q '"error"'; then
					peer_error=$(echo "$peer_services" | jsonfilter -e '@.error' 2>/dev/null)
				else
					peer_status="online"
				fi

				result="$result,{\"node_id\":\"${peer_id:-$peer_addr}\",\"node_name\":\"${peer_name:-$peer_addr}\",\"address\":\"$peer_addr\",\"is_local\":false,\"status\":\"$peer_status\","

				if [ "$peer_status" = "online" ]; then
					# Parse peer services
					local peer_svc_count=$(echo "$peer_services" | jsonfilter -e '@.services[*]' 2>/dev/null | wc -l)
					result="$result\"services\":["

					local j=0
					while [ $j -lt $peer_svc_count ]; do
						local svc_name=$(echo "$peer_services" | jsonfilter -e "@.services[$j].name" 2>/dev/null)
						local svc_status=$(echo "$peer_services" | jsonfilter -e "@.services[$j].status" 2>/dev/null)
						local svc_enabled=$(echo "$peer_services" | jsonfilter -e "@.services[$j].enabled" 2>/dev/null)
						local svc_port=$(echo "$peer_services" | jsonfilter -e "@.services[$j].port" 2>/dev/null)

						[ $j -gt 0 ] && result="$result,"
						result="$result{\"name\":\"$svc_name\",\"status\":\"$svc_status\",\"enabled\":${svc_enabled:-0},\"port\":\"$svc_port\"}"
						j=$((j + 1))
					done

					result="$result]}"
				else
					result="$result\"services\":[],\"error\":\"$peer_error\"}"
				fi
			fi
			p=$((p + 1))
		done
	fi

	result="$result],"

	# Add summary stats
	result="$result\"summary\":{\"total_nodes\":0,\"online_nodes\":0,\"total_services\":0,\"running_services\":0}}"

	echo "$result"
}

# Output aggregated mesh services
build_mesh_services