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

ENV_FILE="${ENV_FILE:-/etc/polymarket-collector.env}"
if [[ -f "$ENV_FILE" ]]; then
  set -a
  # shellcheck disable=SC1090
  source "$ENV_FILE"
  set +a
fi

DATA_DIR="${DATA_DIR:-/var/lib/polymarket-collector}"
RCLONE_REMOTE="${RCLONE_REMOTE:-}"
LOCAL_RETENTION_DAYS="${LOCAL_RETENTION_DAYS:-0}"
REMOVE_AFTER_UPLOAD="${REMOVE_AFTER_UPLOAD:-false}"
BACKUP_MIN_AGE="${BACKUP_MIN_AGE:-2m}"

if [[ -z "$RCLONE_REMOTE" ]]; then
  echo "RCLONE_REMOTE is empty; backup is not configured."
  exit 0
fi
if [[ ! -d "$DATA_DIR" ]]; then
  echo "Data directory does not exist: $DATA_DIR" >&2
  exit 1
fi
if ! [[ "$LOCAL_RETENTION_DAYS" =~ ^[0-9]+$ ]]; then
    echo "LOCAL_RETENTION_DAYS must be a non-negative integer." >&2
    exit 1
fi

case "${REMOVE_AFTER_UPLOAD,,}" in
  1|true|yes) RCLONE_ACTION="move" ;;
  0|false|no) RCLONE_ACTION="copy" ;;
  *)
    echo "REMOVE_AFTER_UPLOAD must be true or false." >&2
    exit 1
    ;;
esac

LOCK_FILE="${BACKUP_LOCK_FILE:-/tmp/polymarket-backup.lock}"
exec 9>"$LOCK_FILE"
flock -n 9 || exit 0

rclone "$RCLONE_ACTION" "$DATA_DIR" "$RCLONE_REMOTE" \
  --include "*.jsonl.gz" \
  --min-age "$BACKUP_MIN_AGE" \
  --checksum \
  --transfers 2 \
  --checkers 4 \
  --retries 3 \
  --low-level-retries 10 \
  --create-empty-src-dirs

if (( LOCAL_RETENTION_DAYS > 0 )); then
  find "$DATA_DIR" -type f -name "*.jsonl.gz" \
    -mtime "+$LOCAL_RETENTION_DAYS" -delete
fi