#!/usr/bin/env bash
#
# Builds TetherShot and packages it into a launchable TetherShot.app bundle.
# The .app wrapper is required so macOS reads Info.plist (LSUIElement +
# NSCameraUsageDescription) -- running the bare binary would crash on the
# first camera request.
#
# Usage:  ./build.sh [debug|release]   (default: release)
#         open TetherShot.app          to run it.
set -euo pipefail
cd "$(dirname "$0")"

CONFIG="${1:-release}"
# Keep build products under SwiftPM's hidden build directory so Spotlight sees
# only the canonical copy installed in ~/Applications.
APP=".build/TetherShot.app"
ENTITLEMENTS="Resources/TetherShot.entitlements"

echo "[1/3] Compiling (${CONFIG})..."
swift build -c "${CONFIG}"
BIN="$(swift build -c "${CONFIG}" --show-bin-path)/TetherShot"

echo "[2/3] Assembling ${APP}..."
rm -rf "${APP}"
mkdir -p "${APP}/Contents/MacOS" "${APP}/Contents/Resources"
cp "${BIN}" "${APP}/Contents/MacOS/TetherShot"
cp Resources/Info.plist "${APP}/Contents/Info.plist"

# Bundle the wireless setup scripts so the menu's "Set Up Wi-Fi Capture…" works.
cp scripts/install-tunneld.sh scripts/uninstall-tunneld.sh "${APP}/Contents/Resources/"
chmod +x "${APP}/Contents/Resources/"*.sh

# Generate the app icon from Resources/AppIcon.png (stock tools only: sips +
# iconutil), so every from-source build/install gets the icon.
if [ -f Resources/AppIcon.png ]; then
    ICONSET="$(mktemp -d)/AppIcon.iconset"
    mkdir -p "${ICONSET}"
    for SZ in 16 32 128 256 512; do
        sips -z "${SZ}" "${SZ}" Resources/AppIcon.png --out "${ICONSET}/icon_${SZ}x${SZ}.png" >/dev/null 2>&1
        D2=$(( SZ * 2 ))
        sips -z "${D2}" "${D2}" Resources/AppIcon.png --out "${ICONSET}/icon_${SZ}x${SZ}@2x.png" >/dev/null 2>&1
    done
    if iconutil -c icns "${ICONSET}" -o "${APP}/Contents/Resources/AppIcon.icns" 2>/dev/null; then
        echo "      icon AppIcon.icns"
    fi
    rm -rf "$(dirname "${ICONSET}")"
fi

# Stamp the bundle version from package.json (single source of truth), BEFORE
# signing so the signature covers it.
if [ -f package.json ] && command -v node >/dev/null 2>&1; then
    VERSION="$(node -p "require('./package.json').version" 2>/dev/null || true)"
    if [ -n "${VERSION}" ]; then
        /usr/libexec/PlistBuddy -c "Set :CFBundleShortVersionString ${VERSION}" "${APP}/Contents/Info.plist" 2>/dev/null || true
        /usr/libexec/PlistBuddy -c "Set :CFBundleVersion ${VERSION}" "${APP}/Contents/Info.plist" 2>/dev/null || true
        echo "      version ${VERSION}"
    fi
fi

# Ad-hoc sign with the Camera entitlement so TCC can attribute permission to a
# stable bundle identity and register TetherShot in Privacy settings.
echo "[3/3] Ad-hoc signing..."
codesign --force --deep --entitlements "${ENTITLEMENTS}" --sign - "${APP}" >/dev/null 2>&1 || \
    echo "      (codesign skipped -- app still runs, camera prompt may repeat)"

echo "Done. Built ${APP}"
echo "Run it with:  open ${APP}"