#!/usr/bin/env bash
set -euo pipefail

SRC_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
CONF_DIR="$SRC_DIR/conf/monitoring"
MOD_DIR="$SRC_DIR/modules/grafana-central/conf"

mkdir -p "$CONF_DIR"

link_file() {
  if [ "$#" -lt 2 ]; then
    echo "[WARN] link_file: arguments insuffisants ($#)" >&2
    return 0
  fi
  local src="$1"
  local dst="$2"
  if [ ! -f "$src" ]; then
    echo "[WARN] Source introuvable: $src" >&2
    return 0
  fi
  if [ -L "$dst" ] || [ -f "$dst" ]; then
    if cmp -s "$src" "$dst" 2>/dev/null; then
      echo "[OK] Déjà aligné: $dst"
      return 0
    fi
    echo "[INFO] Remplacement: $dst"
    rm -f "$dst"
  fi
  ln -s "$src" "$dst"
  echo "[OK] Lien créé: $dst -> $src"
}

link_file "$MOD_DIR/grafana.ini" "$CONF_DIR/grafana.ini"
link_file "$MOD_DIR/datasources.yml" "$CONF_DIR/datasources.yml"
link_file "$MOD_DIR/prometheus.yml" "$CONF_DIR/prometheus.yml"
link_file "$MOD_DIR/promtail-config.yml" "$CONF_DIR/promtail-config.yml"
link_file "$MOD_DIR/loki-config.yaml" "$CONF_DIR/loki-config.yaml"

echo "[DONE] Liens symboliques de monitoring synchronisés."