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

SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
PROJECT_DIR="$(cd "$SCRIPT_DIR/.." && pwd)"
GODOT_BIN="${GODOT_BIN:-/Applications/Godot.app/Contents/MacOS/Godot}"
TARGET="${1:-all}"
VERSION="${WHALETOWN_VERSION:-1.0.0}"

if [[ ! -x "$GODOT_BIN" ]]; then
  echo "Godot executable not found: $GODOT_BIN" >&2
  echo "Set GODOT_BIN to the Godot 4.6.2 executable path." >&2
  exit 1
fi

export_target() {
  local preset="$1"
  local output="$2"
  local marker
  marker="$(mktemp /tmp/whaletown-export.XXXXXX)"
  mkdir -p "$(dirname "$output")"
  echo "Exporting $preset -> $output"
  "$GODOT_BIN" --headless --path "$PROJECT_DIR" --export-release "$preset" "$output"
  if [[ ! -e "$output" ]] || [[ -z "$(find "$output" -newer "$marker" -print -quit 2>/dev/null)" ]]; then
    echo "Export failed: Godot did not create a fresh artifact at $output" >&2
    exit 1
  fi
}

package_artifacts() {
  local release_dir="$PROJECT_DIR/build/desktop/release"
  local mac_app="$PROJECT_DIR/build/desktop/macos/WhaleTown.app"
  local windows_exe="$PROJECT_DIR/build/desktop/windows/WhaleTown.exe"
  local mac_zip="$release_dir/WhaleTown-macOS-$VERSION.zip"
  local windows_zip="$release_dir/WhaleTown-Windows-x86_64-$VERSION.zip"

  if [[ ! -d "$mac_app" ]] || [[ ! -f "$windows_exe" ]]; then
    echo "Both macOS and Windows artifacts are required before packaging." >&2
    exit 1
  fi

  mkdir -p "$release_dir"
  echo "Packaging $mac_zip"
  /usr/bin/ditto -c -k --sequesterRsrc --keepParent "$mac_app" "$mac_zip"
  echo "Packaging $windows_zip"
  /usr/bin/ditto -c -k --keepParent "$windows_exe" "$windows_zip"
  (
    cd "$release_dir"
    shasum -a 256 "$(basename "$mac_zip")" "$(basename "$windows_zip")" > SHA256SUMS.txt
  )
  echo "Release packages are under: $release_dir"
}

case "$TARGET" in
  macos)
    export_target "WhaleTown macOS" "$PROJECT_DIR/build/desktop/macos/WhaleTown.app"
    ;;
  windows)
    export_target "WhaleTown Windows" "$PROJECT_DIR/build/desktop/windows/WhaleTown.exe"
    ;;
  all)
    export_target "WhaleTown macOS" "$PROJECT_DIR/build/desktop/macos/WhaleTown.app"
    export_target "WhaleTown Windows" "$PROJECT_DIR/build/desktop/windows/WhaleTown.exe"
    ;;
  package)
    package_artifacts
    ;;
  release)
    export_target "WhaleTown macOS" "$PROJECT_DIR/build/desktop/macos/WhaleTown.app"
    export_target "WhaleTown Windows" "$PROJECT_DIR/build/desktop/windows/WhaleTown.exe"
    package_artifacts
    ;;
  *)
    echo "Usage: $0 [macos|windows|all|package|release]" >&2
    exit 2
    ;;
esac

echo "Desktop export complete. Files are under: $PROJECT_DIR/build/desktop"