#!/usr/bin/env bash

set -euo pipefail

AGENTDIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
AGENT="${AGENTDIR}/ogp_agent.pl"
PID_FILE=""
TIMEOUT=10

while [ "$#" -gt 0 ]; do
	case "$1" in
		-pidfile)
			PID_FILE="${2:-}"
			shift 2
			;;
		*)
			shift
			;;
	esac
done

mkdir -p "${AGENTDIR}/logs" "${AGENTDIR}/screenlogs" "${AGENTDIR}/tmp" "${AGENTDIR}/_gsp_content/hooks" "${AGENTDIR}/_gsp_content/generated" "${AGENTDIR}/_gsp_content/runtime"
touch "${AGENTDIR}/_gsp_content/runtime/server_content.pids" 2>/dev/null || true

if [ "$(id -u)" -eq 0 ]; then
	echo "ERROR: Do not run the GSP agent as root. Run it as the configured agent user." >&2
	exit 1
fi

if [ ! -f "${AGENTDIR}/Cfg/Config.pm" ]; then
	echo "ERROR: Missing ${AGENTDIR}/Cfg/Config.pm. Run ./agent_conf.sh --guided." >&2
	exit 1
fi

if grep -Eq "CHANGE_ME_PANEL_AGENT_KEY|key[[:space:]]*=>[[:space:]]*''" "${AGENTDIR}/Cfg/Config.pm"; then
	echo "ERROR: ${AGENTDIR}/Cfg/Config.pm still has a placeholder agent key." >&2
	exit 1
fi

if [ ! -x "$AGENT" ]; then
	chmod ug+x "$AGENT" 2>/dev/null || true
fi

if [ -n "$PID_FILE" ]; then
	echo "$$" > "$PID_FILE"
fi

cd "$AGENTDIR"

while true; do
	perl "$AGENT" "$@" || rc=$?
	rc="${rc:-0}"
	if [ "$rc" -eq 0 ]; then
		echo "$(date): GSP Agent stopped cleanly"
		exit 0
	fi
	echo "$(date): GSP Agent exited with status ${rc}; restarting in ${TIMEOUT}s" >&2
	sleep "$TIMEOUT"
	unset rc
done