#!/bin/sh
# Installs or updates Instant Answer on macOS:
#   curl -fsSL https://instant-answer.werkstatt.works/install.sh | sh
#
# The app isn't notarized by Apple, so a browser download would be blocked by Gatekeeper. Files
# downloaded with curl aren't marked as coming from the internet, so the app opens normally.
set -eu

SITE=https://instant-answer.werkstatt.works
PLATFORM=darwin-aarch64
APP="Instant Answer.app"

fail() { echo "$*" >&2; exit 1; }

[ "$(uname -s)" = Darwin ] || fail "This installer is for macOS. Other systems: $SITE/download/"
[ "$(uname -m)" = arm64 ] || fail "Instant Answer needs a Mac with Apple silicon (M1 or newer)."
[ "$(sw_vers -productVersion | cut -d. -f1)" -ge 26 ] || fail "Instant Answer needs macOS 26 or newer."

work=$(mktemp -d)
trap 'rm -rf "${work}"' EXIT

curl -fsSL "$SITE/downloads/$PLATFORM/latest.json" -o "${work}/latest.json" || fail "Could not reach $SITE."
version=$(plutil -extract version raw -o - "${work}/latest.json")
url=$(plutil -extract "platforms.$PLATFORM.url" raw -o - "${work}/latest.json")

echo "Downloading Instant Answer ${version}..."
curl -fL --progress-bar "$url" -o "${work}/app.tar.gz"
tar -xzf "${work}/app.tar.gz" -C "${work}"
[ -d "${work}/$APP" ] || fail "The download is incomplete, please try again."

# /Applications if writable (admin users), otherwise the user's own Applications folder.
target=/Applications
[ -w "${target}" ] || target="$HOME/Applications"
mkdir -p "${target}"

osascript -e 'quit app "Instant Answer"' >/dev/null 2>&1 || true
rm -rf "${target:?}/$APP"
mv "${work}/$APP" "${target}/"

echo "Installed Instant Answer ${version} in ${target}. Starting it..."
open "${target}/$APP"
echo "Instant Answer runs in the menu bar. It updates itself from now on."