#!/usr/bin/env bash
# ------------------------------------------------------------------
#  Grafana
#  Source:       https://server-installer.de/scripts/grafana
#  Version:      v1.0.1
#  Last updated: 2026-08-20
#  Target OS:    Linux (with Docker)
# ------------------------------------------------------------------
set -euo pipefail

log() { printf '\033[36m==>\033[0m %s\n' "$*"; }

if [[ $EUID -ne 0 ]]; then
  echo "Please run as root (sudo)." >&2
  exit 1
fi

command -v docker >/dev/null || {
  echo "Docker is required. Install it first:" >&2
  echo "  curl -fsSL server-installer.de/scripts/docker | bash" >&2
  exit 1
}

# Arguments
PORT="3000"
while [[ $# -gt 0 ]]; do
  case "$1" in
    --port) PORT="$2"; shift 2 ;;
    *) echo "Unknown argument: $1" >&2; exit 1 ;;
  esac
done

docker volume create grafana-storage >/dev/null

log "Starting Grafana OSS on port ${PORT}"
docker run -d --name grafana --restart=unless-stopped \
  -p "${PORT}:3000" \
  -v grafana-storage:/var/lib/grafana \
  grafana/grafana-oss

log "Grafana: http://$(hostname -I | awk '{print $1}'):${PORT} (login admin / admin)"

log "Done."