#!/usr/bin/env bash
#
# send_dir.sh — upload every file in a directory to a running FileServer.
#
# Each file is POSTed to /upload as multipart/form-data. By default one file per
# request (so you get per-file feedback); use -b to batch all files into a
# single request instead.
#
# Usage:
#   bin/send_dir.sh [-u URL] [-b] [-r] DIR
#
#   DIR         directory whose files are uploaded
#   -u URL      server base URL (default: http://127.0.0.1:8080, or $FS_URL)
#   -b          batch: send all files in one multipart request
#   -r          recurse into subdirectories
#
# Examples:
#   bin/send_dir.sh data/samples
#   bin/send_dir.sh -u http://host:9000 -b -r ~/Downloads
set -euo pipefail

url="${FS_URL:-http://127.0.0.1:8080}"
batch=0
recurse=0

while getopts ":u:brh" opt; do
  case "$opt" in
    u) url="$OPTARG" ;;
    b) batch=1 ;;
    r) recurse=1 ;;
    h) sed -n '2,20p' "$0"; exit 0 ;;
    \?) echo "unknown option: -$OPTARG" >&2; exit 2 ;;
    :) echo "option -$OPTARG needs an argument" >&2; exit 2 ;;
  esac
done
shift $((OPTIND - 1))

dir="${1:-}"
if [[ -z "$dir" ]]; then
  echo "usage: $0 [-u URL] [-b] [-r] DIR" >&2
  exit 2
fi
if [[ ! -d "$dir" ]]; then
  echo "not a directory: $dir" >&2
  exit 2
fi

endpoint="${url%/}/upload"

# Collect regular files (optionally recursive), NUL-safe for odd filenames.
mapfile -d '' files < <(
  if [[ "$recurse" -eq 1 ]]; then
    find "$dir" -type f -print0
  else
    find "$dir" -maxdepth 1 -type f -print0
  fi
)

if [[ "${#files[@]}" -eq 0 ]]; then
  echo "no files found in $dir" >&2
  exit 1
fi

echo "uploading ${#files[@]} file(s) from '$dir' to $endpoint"

if [[ "$batch" -eq 1 ]]; then
  # One request with every file. Each -F field name is arbitrary; the server
  # keys off the filename, so we just number them.
  args=()
  i=0
  for f in "${files[@]}"; do
    args+=(-F "f${i}=@${f}")
    i=$((i + 1))
  done
  code=$(curl -sS -o /dev/stderr -w '%{http_code}' "${args[@]}" "$endpoint")
  echo
  echo "-> HTTP $code"
  [[ "$code" == "202" ]]
else
  # One request per file.
  ok=0
  fail=0
  for f in "${files[@]}"; do
    code=$(curl -sS -o /dev/stderr -w '%{http_code}' -F "file=@${f}" "$endpoint")
    echo "  -> HTTP $code  ${f}"
    if [[ "$code" == "202" ]]; then ok=$((ok + 1)); else fail=$((fail + 1)); fi
  done
  echo "done: $ok accepted, $fail failed"
  [[ "$fail" -eq 0 ]]
fi