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

ROOT_DIR="$(cd "$(dirname "$0")/.." && pwd)"
DIST_DIR="$ROOT_DIR/dist"
APP_NAME="${APP_NAME:-XWorkmate}"
TARGET_APP="${TARGET_APP:-/Applications/$APP_NAME.app}"
STAGING_APP="${STAGING_APP:-${TARGET_APP}.installing}"
DMG_PATH="${1:-}"
APP_NAME_SLUG="$(printf '%s' "$APP_NAME" | tr '[:upper:]' '[:lower:]' | tr ' ' '-')"
MOUNT_POINT="$(mktemp -d "/tmp/${APP_NAME_SLUG}-install.XXXXXX")"
OPEN_AFTER_INSTALL="${OPEN_AFTER_INSTALL:-0}"

cleanup() {
  hdiutil detach "$MOUNT_POINT" -quiet 2>/dev/null || true
  rm -rf "$STAGING_APP" 2>/dev/null || true
  rmdir "$MOUNT_POINT" 2>/dev/null || true
}

trap cleanup EXIT

validate_app_bundle() {
  local app_path="$1"
  local info_plist="$app_path/Contents/Info.plist"
  local executable="$app_path/Contents/MacOS/$APP_NAME"
  local frameworks_dir="$app_path/Contents/Frameworks"

  [[ -d "$app_path" ]] || {
    echo "Installed app bundle missing: $app_path" >&2
    return 1
  }
  [[ -f "$info_plist" ]] || {
    echo "Installed app is missing Info.plist: $info_plist" >&2
    return 1
  }
  [[ -x "$executable" ]] || {
    echo "Installed app is missing executable: $executable" >&2
    return 1
  }
  [[ -d "$frameworks_dir" ]] || {
    echo "Installed app is missing Frameworks directory: $frameworks_dir" >&2
    return 1
  }

  bash "$ROOT_DIR/scripts/validate-macos-app-bundle.sh" "$app_path"
  codesign --verify --deep --verbose=2 "$app_path"
}

if [[ -z "$DMG_PATH" ]]; then
  shopt -s nullglob
  dmgs=("$DIST_DIR"/"$APP_NAME"-*.dmg)
  shopt -u nullglob
  if [[ "${#dmgs[@]}" -eq 0 ]]; then
    echo "No DMG found under $DIST_DIR for $APP_NAME" >&2
    exit 1
  fi
  # Sort by modification time and pick the newest
  DMG_PATH="$(ls -t "${dmgs[@]}" | head -n 1)"
fi

if [[ ! -f "$DMG_PATH" ]]; then
  echo "DMG not found: $DMG_PATH" >&2
  exit 1
fi

echo "Mounting $DMG_PATH..."
hdiutil attach "$DMG_PATH" -mountpoint "$MOUNT_POINT" -nobrowse -readonly -quiet

SOURCE_APP="$MOUNT_POINT/$APP_NAME.app"
if [[ ! -d "$SOURCE_APP" ]]; then
  echo "Expected app bundle missing from DMG: $SOURCE_APP" >&2
  exit 1
fi

validate_app_bundle "$SOURCE_APP"

if [[ -d "$TARGET_APP" ]]; then
  echo "Replacing existing app at $TARGET_APP"
  rm -rf "$TARGET_APP"
fi

rm -rf "$STAGING_APP"
echo "Installing to staging app $STAGING_APP..."
ditto "$SOURCE_APP" "$STAGING_APP"
validate_app_bundle "$STAGING_APP"

echo "Promoting staging app to $TARGET_APP..."
mv "$STAGING_APP" "$TARGET_APP"
validate_app_bundle "$TARGET_APP"
xattr -dr com.apple.quarantine "$TARGET_APP" 2>/dev/null || true

if [[ "$OPEN_AFTER_INSTALL" == "1" ]]; then
  open "$TARGET_APP"
fi

echo "Installed: $TARGET_APP"