#!/usr/bin/env bash
# install.sh — quick installer that downloads 3270NerdFont files and installs them to ~/.fonts/NerdFont
set -euo

# Default installation directory
ROOT_DIR="$HOME/.fonts/3270NerdFont"

# Default base URL to download fonts from (as requested)
# NOTE: owner changed to yumiaura in this script
BASE_URL="https://raw.githubusercontent.com/yumiaura/3270NerdFont/refs/heads/main/fonts"

show_help(){
  cat <<EOF
Usage: install.sh [options] [font-file ...]

Downloads font files from the repository raw URL and installs them into ${ROOT_DIR} by default.

If no font filenames are provided, the script will use files present in the local "fonts/" directory
next to this script and download those same filenames from the remote BASE_URL.

Options:
  -b URL   Use a different base URL for downloads (default: ${BASE_URL})
  -t DIR   Install into DIR instead of ${ROOT_DIR}
  -f       Force overwrite existing files
  -n       Dry-run (show actions without performing downloads)
  -h       Show this help

Examples:
  # Download specific files (by basename) from the repo and install them
  install.sh 3270NerdFont-Condensed.ttf 3270NerdFont-Regular.ttf

  # Use a custom install directory
  install.sh -t ~/.local/share/fonts 3270NerdFont-*.ttf

  # Dry-run using all filenames found in local ./fonts/ directory
  install.sh -n
EOF
}

DRY_RUN=0
FORCE=0

while getopts ":b:t:fnh" opt; do
  case ${opt} in
    b) BASE_URL="$OPTARG" ;;
    t) ROOT_DIR="$OPTARG" ;;
    f) FORCE=1 ;;
    n) DRY_RUN=1 ;;
    h) show_help; exit 0 ;;
    \?) echo "Unknown option: -$OPTARG" >&2; show_help; exit 2 ;;
  esac
done
shift $((OPTIND-1))

# Default list of font basenames to download when no filenames are provided.
# These are fetched from ${BASE_URL}/<name>
DEFAULT_FILENAMES=(
  3270NerdFont-Condensed.ttf
  3270NerdFontMono-Condensed.ttf
  3270NerdFontMono-Regular.ttf
  3270NerdFontMono-SemiCondensed.ttf
  3270NerdFontPropo-Condensed.ttf
  3270NerdFontPropo-Regular.ttf
  3270NerdFontPropo-SemiCondensed.ttf
  3270NerdFont-Regular.ttf
  3270NerdFont-SemiCondensed.ttf
)

# If the user supplied filenames, use them; otherwise use the default list above.
if [ "$#" -eq 0 ]; then
  FILENAMES=("${DEFAULT_FILENAMES[@]}")
else
  FILENAMES=("$@")
fi

mkdir -p "$ROOT_DIR"

download_cmds=()
for name in "${FILENAMES[@]}"; do
  # skip empty names
  [ -z "$name" ] && continue
  # construct remote url and destination
  remote_url="$BASE_URL/$name"
  dest="$ROOT_DIR/$name"

  if [ -e "$dest" ] && [ "$FORCE" -ne 1 ]; then
    echo "Skipping existing file: $dest (use -f to overwrite)" >&2
    continue
  fi

  # choose downloader
  if command -v curl >/dev/null 2>&1; then
    dl_cmd=(curl -fSL -o "$dest" "$remote_url")
  elif command -v wget >/dev/null 2>&1; then
    dl_cmd=(wget -O "$dest" "$remote_url")
  else
    echo "Neither curl nor wget is available; cannot download files." >&2
    exit 3
  fi

  if [ "$DRY_RUN" -eq 1 ]; then
    download_cmds+=("${dl_cmd[*]}")
  else
    echo "Downloading $remote_url -> $dest"
    # attempt download, continue on failure
    if ! "${dl_cmd[@]}"; then
      echo "Failed to download: $remote_url" >&2
      # remove partial file if any
      rm -f "$dest" || true
      continue
    fi
  fi
done

if [ "$DRY_RUN" -eq 1 ]; then
  echo "Dry-run: the following commands would be executed:"
  for c in "${download_cmds[@]}"; do
    echo "  $c"
  done
  exit 0
fi

echo "Updating font cache for $ROOT_DIR ..."
if command -v fc-cache >/dev/null 2>&1; then
  fc-cache -f -v "$ROOT_DIR" || true
else
  echo "fc-cache not found; skipping font cache update." >&2
fi

echo "Done. Fonts installed to: $ROOT_DIR"