#!/bin/bash
set -euo pipefail

GRAFANA_URL=http://localhost:3000
GRAFANA_USER=admin
GRAFANA_PASS=holamundo
BACKUP_DIR=/opt/server/backups/grafana_dashboards
KEEP=4

mkdir -p "$BACKUP_DIR"

STAMP=$(date +%Y%m%d)
TMP_DIR=$(mktemp -d)
trap 'rm -rf "$TMP_DIR"' EXIT

curl -sf -u "$GRAFANA_USER:$GRAFANA_PASS" "$GRAFANA_URL/api/search?type=dash-db" \
  | jq -r '.[].uid' \
  | while read -r uid; do
      dashboard_json=$(curl -sf -u "$GRAFANA_USER:$GRAFANA_PASS" "$GRAFANA_URL/api/dashboards/uid/$uid")
      title=$(jq -r '.dashboard.title' <<< "$dashboard_json")
      safe_title=$(echo "$title" | tr -c 'A-Za-z0-9' '_' | sed 's/_\+/_/g; s/^_//; s/_$//')
      echo "$dashboard_json" > "$TMP_DIR/${safe_title}__${uid}.json"
    done

tar czf "$BACKUP_DIR/grafana_dashboards_$STAMP.tar.gz" -C "$TMP_DIR" .

ls -1t "$BACKUP_DIR"/grafana_dashboards_*.tar.gz | tail -n +$((KEEP + 1)) | xargs -r rm --