#!/usr/bin/env bash
set -euo pipefail

ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
BUILD_DIR="${1:-$ROOT_DIR/build}"
DIST_DIR="${2:-$ROOT_DIR/dist/macos}"
STAGE_DIR="$DIST_DIR/dmg-staging"
INSTALL_PREFIX="$DIST_DIR/install"
APP_BUNDLE="OrbitHub.app"

if [[ ! -f "$BUILD_DIR/CMakeCache.txt" ]]; then
  echo "Build directory not configured: $BUILD_DIR" >&2
  echo "Run: cmake -S \"$ROOT_DIR\" -B \"$BUILD_DIR\" -G Ninja" >&2
  exit 1
fi

VERSION="$(sed -n 's/^CMAKE_PROJECT_VERSION:STATIC=//p' "$BUILD_DIR/CMakeCache.txt" | head -n1)"
if [[ -z "$VERSION" ]]; then
  echo "Unable to determine project version from $BUILD_DIR/CMakeCache.txt" >&2
  exit 1
fi

MACDEPLOYQT="$(brew --prefix qt@6)/bin/macdeployqt"
if [[ ! -x "$MACDEPLOYQT" ]]; then
  echo "macdeployqt not found at $MACDEPLOYQT" >&2
  echo "Install it: brew install qt@6" >&2
  exit 1
fi

mkdir -p "$DIST_DIR"
rm -rf "$STAGE_DIR" "$INSTALL_PREFIX"
mkdir -p "$STAGE_DIR"

cmake --build "$BUILD_DIR" -j
cmake --install "$BUILD_DIR" --prefix "$INSTALL_PREFIX"

if [[ ! -d "$INSTALL_PREFIX/$APP_BUNDLE" ]]; then
  echo "Expected app bundle not found: $INSTALL_PREFIX/$APP_BUNDLE" >&2
  exit 1
fi

"$MACDEPLOYQT" "$INSTALL_PREFIX/$APP_BUNDLE"

cp -R "$INSTALL_PREFIX/$APP_BUNDLE" "$STAGE_DIR/$APP_BUNDLE"
ln -s /Applications "$STAGE_DIR/Applications"

OUTPUT_DMG="$DIST_DIR/OrbitHub-${VERSION}.dmg"
rm -f "$OUTPUT_DMG"
hdiutil create -volname "OrbitHub" -srcfolder "$STAGE_DIR" -ov -format UDZO "$OUTPUT_DMG"

echo "Created $OUTPUT_DMG"