#!/bin/bash

log() {
  echo "[$(date '+%F %T')] $*"
}

fail() {
  log "❌ $*"
  exit 1
}

upload() {
  local SRC=$1
  local DEST=$2

  log "☁️ Upload: $SRC → $DEST"

  rclone copy "$SRC" "$DEST" \
    --transfers=2 \
    --checkers=4 \
    --retries=5 \
    --low-level-retries=10 \
    --progress \
  || fail "Upload fehlgeschlagen: $SRC"
}

# -----------------------------
# Alte Backups behalten, nur X bleiben
# -----------------------------
cleanup_keep_latest() {
  local REMOTE_PATH=$1
  local KEEP_COUNT=$2

  log "🧹 Prüfe alte Backups auf $REMOTE_PATH, behalte nur die letzten $KEEP_COUNT..."

  # Liste aller Backups, älteste zuerst
  local BACKUPS
  BACKUPS=$(rclone lsf "$REMOTE_PATH" --dirs-only --max-depth 1 | sort)

  local TOTAL=$(echo "$BACKUPS" | wc -l)

  if (( TOTAL <= KEEP_COUNT )); then
    log "✅ Nur $TOTAL Backups vorhanden, nichts zu löschen"
    return
  fi

  # Alte Backups ermitteln
  local TO_DELETE_COUNT=$((TOTAL - KEEP_COUNT))
  local TO_DELETE=$(echo "$BACKUPS" | head -n "$TO_DELETE_COUNT")

  for b in $TO_DELETE; do
    log "🗑️ Lösche altes Backup: $REMOTE_PATH/$b"
    rclone delete "$REMOTE_PATH/$b" --rmdirs || log "⚠️ Fehler beim Löschen von $b"
  done

  log "✅ Alte Backups bereinigt"
}