# Rewrite absolute SDL load commands in the Companion executable to the bundled copies.
#
# Configured from companion/targets/mac/bundle_sdl_fixup.cmake.in - do not edit the copy in
# the build tree.
#
# Companion used to run fixup_bundle, which walked every Mach-O in the bundle and rewrote all
# of their load commands in one pass. That was replaced by qt_deploy_runtime_dependencies,
# which runs *before* the SDL install(FILES) steps, and by an install_name_tool -id call that
# only fixes each dylib's own id. Nothing in that chain guarantees the executable actually
# references the SDL copies sitting in Contents/Frameworks, so make it explicit here.

set(_app "${CMAKE_INSTALL_PREFIX}/@companion_app_dir@")
set(_bin "${_app}/Contents/MacOS/@COMPANION_OSX_APP_BUNDLE_NAME@")

if(NOT EXISTS "${_bin}")
  message(FATAL_ERROR "Companion executable not found for SDL fixup: ${_bin}")
endif()

execute_process(
  COMMAND otool -L "${_bin}"
  OUTPUT_VARIABLE _otool_out
  ERROR_VARIABLE _otool_err
  RESULT_VARIABLE _otool_res
)
if(NOT _otool_res EQUAL 0)
  message(FATAL_ERROR "otool -L failed for ${_bin}: ${_otool_err}")
endif()

string(REPLACE "\n" ";" _lines "${_otool_out}")
foreach(_line IN LISTS _lines)
  # dependency lines are tab-indented: "\t<path> (compatibility version ..., current ...)"
  string(REGEX MATCH "^\t([^ ]+)" _matched "${_line}")
  if(NOT _matched)
    continue()
  endif()
  set(_ref "${CMAKE_MATCH_1}")

  # @rpath / @executable_path / @loader_path already resolve inside the bundle
  if(NOT _ref MATCHES "^/")
    continue()
  endif()
  if(NOT _ref MATCHES "SDL2|SDL3")
    continue()
  endif()

  # Keep the framework tail (SDL2.framework/Versions/A/SDL2) so the rewritten reference
  # matches the layout install(IMPORTED_RUNTIME_ARTIFACTS) produced; plain dylibs land
  # directly in Frameworks under their own name.
  if(_ref MATCHES "/(SDL[23]\\.framework/.*)$")
    set(_tail "${CMAKE_MATCH_1}")
  else()
    get_filename_component(_tail "${_ref}" NAME)
  endif()

  set(_new "@executable_path/../Frameworks/${_tail}")
  message(STATUS "Rewriting SDL reference: ${_ref} -> ${_new}")
  execute_process(
    COMMAND install_name_tool -change "${_ref}" "${_new}" "${_bin}"
    ERROR_VARIABLE _change_err
    RESULT_VARIABLE _change_res
  )
  if(NOT _change_res EQUAL 0)
    message(FATAL_ERROR "install_name_tool -change failed for ${_ref}: ${_change_err}")
  endif()
endforeach()