#!/bin/bash
set -euo pipefail

BUCKET="s3://borealis/borealis/backups"
RETENTION_DAYS=15

CUTOFF_TS=$(date -d "$RETENTION_DAYS days ago" +%s)

s3cmd ls "$BUCKET/" | awk '/DIR/ {print $2}' | while read -r DIR; do
  # DIR example: s3://borealis/borealis/backups/05Dec2025/
  FOLDER_NAME=$(basename "$DIR")

  # Convert DDMonYYYY → timestamp
  if FOLDER_TS=$(date -d "$FOLDER_NAME" +%s 2>/dev/null); then
    if [ "$FOLDER_TS" -lt "$CUTOFF_TS" ]; then
      echo "Deleting folder: $DIR"
      s3cmd del --recursive "$DIR"
    else
      echo "Keeping folder: $DIR"
    fi
  else
    echo "Skipping unknown folder format: $DIR"
  fi
done