#!/bin/bash
# Verify an RFS flist (.fl) by inspecting, listing tree, and optional mount test.
# Usage:
#   ./scripts/rfs/verify-flist.sh /path/to/foo.fl
#   ./scripts/rfs/verify-flist.sh /path/to/foo.fl --mount
#
# Notes:
# - Requires the rfs binary (PATH or components fallback).
# - --mount performs a temporary mount (needs FUSE and privileges).

set -euo pipefail

HERE="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
# shellcheck source=/dev/null
source "${HERE}/common.sh"

section() { echo -e "\n==== $* ====\n"; }

if [[ $# -lt 1 ]]; then
  echo "Usage: $0 /path/to/foo.fl [--mount]"
  exit 1
fi

FL_PATH="$1"
DO_MOUNT="${2:-}"

if [[ ! -f "$FL_PATH" ]]; then
  echo "[ERROR] flist not found: ${FL_PATH}" >&2
  exit 1
fi

section "Locating rfs binary"
rfs_common_locate_rfs

section "Inspect flist"
safe_execute "${RFS_BIN}" flist inspect "${FL_PATH}" || true

section "Tree (first 100 entries)"
safe_execute "${RFS_BIN}" flist tree "${FL_PATH}" | head -n 100 || true

if [[ "$DO_MOUNT" == "--mount" ]]; then
  section "Attempting temporary mount"
  MNT="$(mktemp -d /tmp/rfs-mnt-XXXXXX)"
  cleanup() {
    set +e
    if mountpoint -q "${MNT}" 2>/dev/null; then
      echo "[INFO] Unmounting ${MNT}"
      fusermount -u "${MNT}" 2>/dev/null || umount "${MNT}" 2>/dev/null || true
    fi
    rmdir "${MNT}" 2>/dev/null || true
  }
  trap cleanup EXIT INT TERM

  echo "[INFO] Mountpoint: ${MNT}"
  # Try mount; some environments require sudo or have limited FUSE. Best-effort.
  if "${RFS_BIN}" mount -m "${FL_PATH}" "${MNT}"; then
    echo "[INFO] Mounted. Listing top-level entries:"
    ls -la "${MNT}" | head -n 50 || true
  else
    echo "[WARN] rfs mount failed (FUSE/permissions?). Skipping mount verification." >&2
  fi
fi

section "Done"
echo "[INFO] Verified flist: ${FL_PATH}"