#!/bin/sh
# Bootstrap script for ollie-remote SSH deployment.
# Checks for cached binary by hash, downloads if needed, then execs.
main() {
set -e
#
CACHE_DIR="${XDG_CACHE_HOME:-$HOME/.cache}/ollie/bin"
CACHE_BIN="$CACHE_DIR/ollie-remote"
CACHE_HASH="$CACHE_DIR/ollie-remote.hash"
#
if [ -x "$CACHE_BIN" ] && [ -f "$CACHE_HASH" ] && [ "$(cat "$CACHE_HASH")" = "@@HASH@@" ]; then
  echo "OLLIE_LOADER_START {\"need_download\":false}" >&2
else
  # Find base64 decoder
  if command -v base64 >/dev/null 2>&1; then
    BASE64_CMD="base64 -d"
    if ! echo "dGVzdA==" | base64 -d >/dev/null 2>&1; then
      BASE64_CMD="base64 -D"
    fi
  elif command -v openssl >/dev/null 2>&1; then
    BASE64_CMD="openssl base64 -d"
  else
    echo "ERROR: no base64 decoder found" >&2
    exit 1
  fi
  #
  if ! command -v gunzip >/dev/null 2>&1 && ! command -v gzip >/dev/null 2>&1; then
    echo "ERROR: no gunzip found" >&2
    exit 1
  fi
  GUNZIP_CMD="gunzip"
  command -v gunzip >/dev/null 2>&1 || GUNZIP_CMD="gzip -d"
  #
  mkdir -p "$CACHE_DIR"
  echo "OLLIE_LOADER_START {\"need_download\":true}" >&2
  #
  # Read download size, then binary data
  while IFS= read -r line; do
    case "$line" in
      OLLIE_DOWNLOAD\ *) BINARY_LENGTH="${line#OLLIE_DOWNLOAD }"; break ;;
    esac
  done
  #
  CACHE_TMP="$CACHE_BIN.tmp.$$"
  if ! head -c "$BINARY_LENGTH" | $BASE64_CMD | $GUNZIP_CMD > "$CACHE_TMP"; then
    rm -f "$CACHE_TMP"
    echo "ERROR: binary transfer failed" >&2
    exit 1
  fi
  chmod +x "$CACHE_TMP"
  mv "$CACHE_TMP" "$CACHE_BIN"
  echo "@@HASH@@" > "$CACHE_HASH"
  echo "OLLIE_LOADER_READY" >&2
fi
#
exec "$CACHE_BIN" serve --cwd @@CWD@@
exit 1
}
main "$@"; exit 2