#!/usr/bin/env bash
# Build a self-contained AppImage of the TeleportFling GUI.
#
# Approach: build the GUI binary, then bundle it plus every shared library it
# needs (from ldd, recursively) plus the dlopened PipeWire stack into an
# AppDir, then package it with appimagetool. Output:
#   dist/TeleportFling-<version>-x86_64.AppImage
#
# Usage:
#   ./packaging/appimage.sh
set -euo pipefail

HERE="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
OUT="${HERE}/dist"
APPDIR="${OUT}/AppDir"
LIBDIR="${APPDIR}/usr/lib"

VERSION="0.1.0"
ARCH="x86_64"

echo "Building teleportfling-gui..."
nix develop --command bash -c "go build -o '${OUT}/teleportfling-gui' ./cmd/teleportfling-gui"

echo "Preparing AppDir..."
rm -rf "${APPDIR}"
mkdir -p "${LIBDIR}" \
  "${APPDIR}/usr/bin" \
  "${APPDIR}/usr/share/applications" \
  "${APPDIR}/usr/share/icons/hicolor/512x512/apps"

install -m 0755 "${OUT}/teleportfling-gui" "${APPDIR}/usr/bin/teleportfling-gui"
install -m 0644 "${HERE}/assets/teleportfling.desktop" "${APPDIR}/usr/share/applications/teleportfling.desktop"
install -m 0644 "${HERE}/assets/teleportfling.png" "${APPDIR}/usr/share/icons/hicolor/512x512/apps/teleportfling.png"
# appimagetool requires the desktop file and icon in the AppDir root.
install -m 0644 "${HERE}/assets/teleportfling.desktop" "${APPDIR}/teleportfling.desktop"
install -m 0644 "${HERE}/assets/teleportfling.png" "${APPDIR}/teleportfling.png"

echo "Bundling runtime libraries..."
# Copy every library the binary links against, resolving dependencies
# iteratively (ldd output may reference libs that themselves need libs).
declare -A seen
collect_libs() {
  local bin="$1"
  while IFS= read -r lib; do
    local name
    name="$(basename "${lib}")"
    if [[ -z "${seen[${name}]:-}" && -f "${lib}" ]]; then
      seen["${name}"]=1
      install -m 0755 "${lib}" "${LIBDIR}/${name}" 2>/dev/null || true
      collect_libs "${lib}"
    fi
  done < <(ldd "${bin}" 2>/dev/null | grep -oE '/[^ ]+\.so[^ ]*' | sort -u)
}
collect_libs "${APPDIR}/usr/bin/teleportfling-gui"
echo "  bundled $(ls "${LIBDIR}" | wc -l) libraries"

# The screencast backend dlopens libpipewire at runtime; ensure it and its
# SPA plugin libs are present (they are pulled in via the recursive ldd walk
# above, but guard against a missing libspa here).
if [[ -f "${LIBDIR}/libpipewire-0.3.so.0" ]]; then
  echo "  bundled libpipewire-0.3.so.0"
fi

echo "Writing AppRun..."
install -m 0755 "${HERE}/packaging/AppRun" "${APPDIR}/AppRun"

echo "Packaging AppImage with appimagetool..."
if [[ ! -x "${OUT}/appimagetool" ]]; then
  echo "appimagetool not found at ${OUT}/appimagetool"
  echo "Download: https://github.com/AppImage/appimagetool/releases/download/continuous/appimagetool-x86_64.AppImage"
  exit 1
fi
"${OUT}/appimagetool" --appimage-extract-and-run "${APPDIR}" "${OUT}/TeleportFling-${VERSION}-${ARCH}.AppImage"

echo "Done: ${OUT}/TeleportFling-${VERSION}-${ARCH}.AppImage"