#!/bin/sh
# Installs Research Vault for Mac from eggnomic.com:
#
#   curl -fsSL https://eggnomic.com/research-vault/install.sh | sh
#
# It reads the selected release from release.json, downloads that DMG, checks its size and SHA-256,
# copies Research Vault into /Applications (or ~/Applications if /Applications is not writable) and
# opens it. Nothing else on your Mac is changed. To remove it, drag Research Vault to the Trash.
#
# A download made with curl is not marked as coming from the internet, so macOS does not show its
# first-launch warning for this alpha build. Read this file before running it if you want to:
#   curl -fsSL https://eggnomic.com/research-vault/install.sh | less
#
# Everything runs inside main, so a partly downloaded script never runs.
set -eu

main() {
  base="${RV_BASE:-https://eggnomic.com/research-vault}"
  apps="${RV_APPS_DIR:-/Applications}"
  app_name="Research Vault.app"

  # Colour and motion only when someone is watching a terminal; plain lines in logs and CI.
  fancy=
  if [ -t 1 ] && [ "${TERM:-dumb}" != dumb ] && [ -z "${NO_COLOR:-}" ]; then fancy=1; fi
  if [ -n "$fancy" ]; then
    Y=$(printf '\033[38;5;221m')
    G=$(printf '\033[38;5;149m'); D=$(printf '\033[38;5;239m'); R=$(printf '\033[0m')
  else
    Y= G= D= R=
  fi
  say() { printf '%s\n' "$*"; }
  ok() { printf '%s✓%s %s\n' "$G" "$R" "$*"; }
  fail() { printf 'Research Vault: %s\n' "$*" >&2; exit 1; }
  dl=

  [ "$(uname -s)" = Darwin ] || fail "this installer is for macOS."
  major=$(sw_vers -productVersion | cut -d. -f1)
  [ "$major" -ge 14 ] || fail "macOS 14 or later is required (this Mac has $(sw_vers -productVersion))."

  work=$(mktemp -d "${TMPDIR:-/tmp}/research-vault.XXXXXX")
  mount="$work/mount"
  cleanup() {
    status=$?
    [ -n "$dl" ] && kill "$dl" 2>/dev/null
    [ -n "$fancy" ] && printf '\033[?25h'
    [ -d "$mount" ] && hdiutil detach -quiet "$mount" >/dev/null 2>&1 || true
    rm -rf "$work"
    exit "$status"
  }
  trap cleanup EXIT
  trap 'exit 130' INT TERM

  say "Checking the latest Research Vault…"
  curl -fsSL "$base/release.json" -o "$work/release.json" || fail "couldn't reach $base/release.json."
  field() { plutil -extract "$1" raw -o - "$work/release.json" 2>/dev/null || fail "release.json is missing $1."; }
  version=$(field version)
  file=$(field artifacts.dmg.file)
  sha=$(field artifacts.dmg.sha256)
  bytes=$(field artifacts.dmg.bytes)
  case "$file" in
    */* | .* | "" ) fail "unexpected file name in release.json: $file" ;;
    *.dmg) ;;
    *) fail "unexpected file name in release.json: $file" ;;
  esac

  label="Downloading Research Vault ${version}…"
  if [ -n "$fancy" ]; then
    # A yellow bar, drawn from the bytes on disk against the size in release.json.
    bar() {
      n=$(( $1 * 24 / bytes )); [ "$n" -gt 24 ] && n=24
      printf '\r%s  %s%s%s%s%s' "$label" "$Y" "$(printf '%*s' "$n" '' | sed 's/ /━/g')" \
        "$D" "$(printf '%*s' $((24 - n)) '' | sed 's/ /━/g')" "$R"
    }
    printf '\033[?25l'
    curl -fsSL "$base/releases/$file" -o "$work/$file" &
    dl=$!
    while kill -0 "$dl" 2>/dev/null; do
      bar "$(stat -f %z "$work/$file" 2>/dev/null || echo 0)"
      sleep 0.08
    done
    wait "$dl" || { dl=; printf '\n'; fail "download failed."; }
    dl=
    bar "$bytes"
    printf '\033[?25h\n'
  else
    say "$label"
    curl -fsSL "$base/releases/$file" -o "$work/$file" || fail "download failed."
  fi
  [ "$(stat -f %z "$work/$file")" = "$bytes" ] || fail "the download is the wrong size; try again."
  [ "$(shasum -a 256 "$work/$file" | cut -d' ' -f1)" = "$sha" ] || fail "the download's checksum doesn't match; nothing was installed."
  ok "Verified the download"

  mkdir -p "$mount"
  hdiutil attach -quiet -nobrowse -readonly -mountpoint "$mount" "$work/$file" || fail "couldn't open the disk image."
  [ -d "$mount/$app_name" ] || fail "the disk image doesn't contain $app_name."

  if [ ! -w "$apps" ]; then
    apps="$HOME/Applications"
    mkdir -p "$apps"
  fi
  if pgrep -xq "Research Vault"; then
    say "Quitting the running Research Vault…"
    osascript -e 'quit app "Research Vault"' >/dev/null 2>&1 || true
    sleep 2
  fi
  rm -rf "$apps/$app_name.new"
  ditto "$mount/$app_name" "$apps/$app_name.new"
  rm -rf "$apps/$app_name"
  mv "$apps/$app_name.new" "$apps/$app_name"
  ok "Installed in $apps"

  say "Opening Research Vault. It will walk you through setup."
  [ -n "${RV_NO_OPEN:-}" ] || open "$apps/$app_name"
}

main "$@"