#!/bin/bash
# Installs or updates Scene on a Mac, with nothing else to install first:
#   curl -fsSL https://askscene.vercel.app/install.sh | bash
# Everything goes in ~/Scene, without administrator rights. It fetches its own copy of Node.js (checked
# against the published hash), starts Scene whenever you log in, and opens the setup page.
# To remove it all:
#   curl -fsSL https://askscene.vercel.app/install.sh | bash -s -- --uninstall
set -euo pipefail

SITE="${SCENE_SITE:-https://askscene.vercel.app}"
HOME_DIR="${SCENE_HOME:-$HOME/Scene}"
NODE_VERSION="24.22.2"
LABEL="${SCENE_LABEL:-app.askscene.server}"
PLIST="$HOME/Library/LaunchAgents/$LABEL.plist"
MARKER="$HOME_DIR/.scene-install"

say() { printf '\n\033[1m%s\033[0m\n' "$1"; }
stop_here() { printf '\n%s\n' "$1" >&2; exit 1; }

uninstall() {
  launchctl bootout "gui/$(id -u)/$LABEL" 2>/dev/null || true
  rm -f "$PLIST"
  # Only a folder this installer made: never someone's own folder that happens to be called Scene.
  if [ -e "$MARKER" ]; then rm -rf "$HOME_DIR"; fi
  say "Scene is removed."
  echo "One last step: in Chrome, go to chrome://extensions and click Remove on Scene."
  echo "If you signed in with ChatGPT, you can also remove Scene in ChatGPT settings."
}

main() {
  [ "${1:-}" = "--uninstall" ] && { uninstall; return; }
  [ "$(uname -s)" = "Darwin" ] || stop_here "Scene runs on Macs for now."

  case "$(uname -m)" in
    arm64) NODE_ARCH=arm64; NODE_SHA=aa9549349e47dffaa42dcf95d6e06ade8c4bdafc980979883b88767670df385a ;;
    x86_64) NODE_ARCH=x64; NODE_SHA=d5e336d588c45be0c37dbd52cc29895593009ca4997a77a1fd02815131ed0e52 ;;
    *) stop_here "Scene doesn't know this kind of Mac ($(uname -m))." ;;
  esac

  if [ -d "$HOME_DIR" ] && [ -n "$(ls -A "$HOME_DIR")" ] && [ ! -e "$MARKER" ]; then
    stop_here "You already have a folder called Scene in your home folder, and it isn't this app. Rename it, then paste the line again."
  fi
  say "Installing Scene. This takes a minute or two."
  mkdir -p "$HOME_DIR/.runtime"
  echo "Installed by Scene" > "$MARKER"
  TEMP="$(mktemp -d)"
  trap 'rm -rf "$TEMP"' EXIT

  NODE_DIR="$HOME_DIR/.runtime/node-$NODE_VERSION"
  if [ ! -x "$NODE_DIR/bin/node" ]; then
    echo "Getting Node.js, which Scene runs on…"
    curl -fsSL "https://nodejs.org/dist/v$NODE_VERSION/node-v$NODE_VERSION-darwin-$NODE_ARCH.tar.gz" -o "$TEMP/node.tar.gz" \
      || stop_here "Couldn't download Node.js. Check your internet connection and paste the line again."
    [ "$(shasum -a 256 "$TEMP/node.tar.gz" | cut -d' ' -f1)" = "$NODE_SHA" ] || stop_here "The Node.js download didn't match its checksum, so it wasn't used. Paste the line again."
    mkdir -p "$TEMP/node"
    tar -xzf "$TEMP/node.tar.gz" -C "$TEMP/node" --strip-components 1
    rm -rf "$NODE_DIR"
    mv "$TEMP/node" "$NODE_DIR"
  fi

  echo "Getting Scene…"
  curl -fsSL "$SITE/download/scene.zip" -o "$TEMP/scene.zip" || stop_here "Couldn't download Scene. Check your internet connection and paste the line again."
  unzip -q -o "$TEMP/scene.zip" -d "$TEMP/unpacked"
  # Your keys, sign-in and episode notes aren't in the download, so an update leaves them alone.
  cp -R "$TEMP/unpacked/scene/." "$HOME_DIR/"

  echo "Setting it up…"
  (cd "$HOME_DIR" && PATH="$NODE_DIR/bin:$PATH" npm install --omit=dev --no-audit --no-fund --loglevel=error) \
    || stop_here "Setup didn't finish. Check your internet connection and paste the line again."
  "$NODE_DIR/bin/node" "$HOME_DIR/server/tunnel.mjs" --download >/dev/null 2>&1 || true

  if [ -z "${SCENE_NO_SERVICE:-}" ]; then
    mkdir -p "$(dirname "$PLIST")"
    cat > "$PLIST" <<PLISTEOF
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
  <key>Label</key><string>$LABEL</string>
  <key>ProgramArguments</key>
  <array>
    <string>$NODE_DIR/bin/node</string>
    <string>--env-file-if-exists=.env</string>
    <string>server/index.mjs</string>
  </array>
  <key>WorkingDirectory</key><string>$HOME_DIR</string>
  <key>RunAtLoad</key><true/>
  <key>KeepAlive</key><true/>
  <key>ThrottleInterval</key><integer>30</integer>
  <key>StandardOutPath</key><string>$HOME_DIR/scene.log</string>
  <key>StandardErrorPath</key><string>$HOME_DIR/scene.log</string>
</dict>
</plist>
PLISTEOF
    launchctl bootout "gui/$(id -u)/$LABEL" 2>/dev/null || true
    launchctl bootstrap "gui/$(id -u)" "$PLIST" || stop_here "Scene couldn't start. Restart your computer and paste the line again."

    READY=""
    for _ in $(seq 1 30); do
      if curl -fsS -o /dev/null --max-time 1 "http://127.0.0.1:4787/api/health" 2>/dev/null; then READY=1; break; fi
      sleep 1
    done
    [ -n "$READY" ] || stop_here "Scene didn't start. If another copy is already running, close it and paste the line again. Details: $HOME_DIR/scene.log"

    say "Scene is installed. Your browser is opening the next step."
    if [ -n "${SCENE_NO_OPEN:-}" ]; then
      echo "(Not opening anything.)"
    elif [ -d "/Applications/Google Chrome.app" ] || [ -d "$HOME/Applications/Google Chrome.app" ]; then
      open -a "Google Chrome" "http://127.0.0.1:4787/setup/"
    else
      open "http://127.0.0.1:4787/setup/"
      echo "Scene works in Google Chrome, which isn't on this Mac yet. Get it at https://www.google.com/chrome/"
    fi
    [ -n "${SCENE_NO_OPEN:-}" ] || open -R "$HOME_DIR/extension" || true
  else
    say "Scene is installed in $HOME_DIR."
  fi
  echo "You can close this window. Scene starts by itself whenever you log in."
}

# Called last, so a download cut off partway can't run half a script.
main "$@"