#!/bin/bash
set -euo pipefail
printf '\nScriptorium - Obsidian configuration installer\n'
default_path="$HOME/Documents/Scriptorium"
printf 'New vault folder (Enter for %s): ' "$default_path"
read -r destination
destination="${destination:-$default_path}"
case "$destination" in /*) ;; *) printf 'Please enter an absolute path.\n'; exit 1 ;; esac
if [ -e "$destination" ] || [ -L "$destination" ]; then
  printf 'Folder already exists: %s. Choose a new folder; nothing was changed.\n' "$destination"
  exit 1
fi
for utility in curl unzip; do
  command -v "$utility" >/dev/null || { printf 'Please install %s and try again.\n' "$utility"; exit 1; }
done
work_dir="$(mktemp -d)"
trap 'rm -rf "$work_dir"' EXIT
curl --progress-bar --fail --location --proto '=https' --tlsv1.2 'https://williamliaw.com/assets/downloads/Scriptorium.zip' -o "$work_dir/Writing.zip"
verify_hash() {
  local actual_hash
  if command -v shasum >/dev/null; then
    actual_hash="$(shasum -a 256 "$1")"
  elif command -v sha256sum >/dev/null; then
    actual_hash="$(sha256sum "$1")"
  else
    printf 'Please install shasum or sha256sum for package verification.\n'; exit 1
  fi
  actual_hash="${actual_hash%% *}"
  [ "$actual_hash" = "$2" ] || { echo "Download verification failed for $1."; exit 1; }
}
verify_hash "$work_dir/Writing.zip" '1cfcf7046ab22a4d23ec8808c72e6e31b68c083748a9efb79c0c5f5a3ed35e4c'
unzip -q "$work_dir/Writing.zip" -d "$work_dir/vault"
[ -f "$work_dir/vault/.obsidian/appearance.json" ] || { printf 'Invalid configuration archive.\n'; exit 1; }
app_image="$HOME/Applications/Obsidian.AppImage"
if command -v obsidian >/dev/null; then
  launcher=(obsidian)
elif [ -x "$app_image" ]; then
  launcher=("$app_image")
elif command -v flatpak >/dev/null && flatpak info md.obsidian.Obsidian >/dev/null 2>&1; then
  launcher=(flatpak run md.obsidian.Obsidian)
elif command -v xdg-open >/dev/null && command -v xdg-mime >/dev/null && [ -n "$(xdg-mime query default x-scheme-handler/obsidian)" ]; then
  launcher=(xdg-open)
else
  case "$(uname -m)" in
    x86_64) asset=Obsidian-1.15.0.AppImage; checksum=1dd8cfb593deaa644101bdb4df65b159ed7985993b6572dd25fd1363459e91cc ;;
    aarch64|arm64) asset=Obsidian-1.15.0-arm64.AppImage; checksum=fb350986a6083f1a26330c297ba2bef8191d60f00f982d4b420c821aceaf04f5 ;;
    *) echo "Obsidian supports x86-64 and ARM64 Linux desktops."; exit 1 ;;
  esac
  echo "Installing Obsidian in $HOME/Applications ..."
  curl --progress-bar --fail --location --proto '=https' --tlsv1.2 "https://github.com/obsidianmd/obsidian-releases/releases/download/v1.15.0/$asset" -o "$work_dir/Obsidian.AppImage"
  verify_hash "$work_dir/Obsidian.AppImage" "$checksum"
  mkdir -p "$HOME/Applications"
  staged_app="$(mktemp "$HOME/Applications/.obsidian-XXXXXXXX")"
  if ! install -m 755 "$work_dir/Obsidian.AppImage" "$staged_app" || ! ln "$staged_app" "$app_image"; then
    rm -f "$staged_app"
    echo "Could not install $app_image. Check the path and try again."
    exit 1
  fi
  rm "$staged_app"
  launcher=("$app_image")
fi
# Install missing font families for the current user.
font_jobs=()
font_dir="${XDG_DATA_HOME:-$HOME/.local/share}/fonts/scriptorium"
installed_fonts="$(fc-list --format='%{family}\n' 2>/dev/null || true)"
install_font() {
  local filename="$1" url="$2" checksum="$3"
  if [ -f "$font_dir/$filename" ]; then
    verify_hash "$font_dir/$filename" "$checksum"
    return
  fi
  curl --progress-bar --fail --location --proto '=https' --tlsv1.2 "$url" -o "$work_dir/$filename"
  verify_hash "$work_dir/$filename" "$checksum"
  mkdir -p "$font_dir"
  install -m 644 "$work_dir/$filename" "$font_dir/$filename"
}
if ! printf '%s\n' "$installed_fonts" | grep -Fq 'EB Garamond'; then
  printf 'Installing EB Garamond ...\n'
  install_font 'EBGaramond-Scriptorium.ttf' 'https://raw.githubusercontent.com/google/fonts/5bb28733cec313b63fbd415b574b5ae35c8aa8b8/ofl/ebgaramond/EBGaramond%5Bwght%5D.ttf' 'ef9512f92f6d579e5dc75af59a5a4b1b8b47d2eda89e00b954d44520e5369027' &
  font_jobs+=("$!")
  install_font 'EBGaramond-Italic-Scriptorium.ttf' 'https://raw.githubusercontent.com/google/fonts/5bb28733cec313b63fbd415b574b5ae35c8aa8b8/ofl/ebgaramond/EBGaramond-Italic%5Bwght%5D.ttf' 'bba2c4499c93c9612b90b9825d32b07da52fce2fe57562a1eb6b833553f93c4e' &
  font_jobs+=("$!")
fi
if ! printf '%s\n' "$installed_fonts" | grep -Fq 'Cormorant Garamond'; then
  printf 'Installing Cormorant Garamond ...\n'
  install_font 'CormorantGaramond-Scriptorium.ttf' 'https://raw.githubusercontent.com/google/fonts/5bb28733cec313b63fbd415b574b5ae35c8aa8b8/ofl/cormorantgaramond/CormorantGaramond%5Bwght%5D.ttf' 'b20b7d9626dd956b2c5e558692ad328b1f19e3275e2782db4fa07670d83f35e0' &
  font_jobs+=("$!")
  install_font 'CormorantGaramond-Italic-Scriptorium.ttf' 'https://raw.githubusercontent.com/google/fonts/5bb28733cec313b63fbd415b574b5ae35c8aa8b8/ofl/cormorantgaramond/CormorantGaramond-Italic%5Bwght%5D.ttf' '0f48ea6abb2084537854f7174c470991a463b13036309e3b50a81511611c530d' &
  font_jobs+=("$!")
fi
font_download_failed=0
for job in ${font_jobs[*]-}; do
  wait "$job" || font_download_failed=1
done
[ "$font_download_failed" -eq 0 ] || { echo "Font installation failed. Please try again."; exit 1; }
if [ -d "$font_dir" ] && command -v fc-cache >/dev/null; then fc-cache -f "$font_dir"; fi
# mkdir fails if the destination appeared during the download; never merge into an existing vault.
mkdir -p "$(dirname "$destination")"
mkdir "$destination"
cp -R "$work_dir/vault/." "$destination/"
printf '\nInstalled in %s\n' "$destination"
printf 'Fonts are ready. Restart any running Obsidian windows to load newly installed fonts.\nOpen Lorem Ipsum in Reading view. Review community plugins before enabling them.\n'
printf 'In Obsidian, choose Open folder as vault and select %s\n' "$destination"
if [ "${launcher[0]}" = "$app_image" ] && [ ! -r /dev/fuse ]; then
  APPIMAGE_EXTRACT_AND_RUN=1 "$app_image" obsidian://choose-vault &
else
  "${launcher[@]}" obsidian://choose-vault &
fi
printf '\nPress Enter to close. '
read -r _