# Project-level configuration.
cmake_minimum_required(VERSION 3.10)
project(runner LANGUAGES CXX)

# The name of the executable created for the application. Change this to change
# the on-disk name of your application.
set(BINARY_NAME "ServerBox")
# The unique GTK application identifier for this application. See:
# https://wiki.gnome.org/HowDoI/ChooseApplicationID
set(APPLICATION_ID "tech.lolli.toolbox")

# Explicitly opt in to modern CMake behaviors to avoid warnings with recent
# versions of CMake.
cmake_policy(SET CMP0063 NEW)

# Load bundled libraries from the lib/ directory relative to the binary.
set(CMAKE_INSTALL_RPATH "$ORIGIN/lib")

# Root filesystem for cross-building.
if(FLUTTER_TARGET_PLATFORM_SYSROOT)
  set(CMAKE_SYSROOT ${FLUTTER_TARGET_PLATFORM_SYSROOT})
  set(CMAKE_FIND_ROOT_PATH ${CMAKE_SYSROOT})
  set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
  set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)
  set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
  set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
endif()

# Define build configuration options.
if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
  set(CMAKE_BUILD_TYPE "Debug" CACHE
    STRING "Flutter build mode" FORCE)
  set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS
    "Debug" "Profile" "Release")
endif()

# Compilation settings that should be applied to most targets.
#
# Be cautious about adding new options here, as plugins use this function by
# default. In most cases, you should add new options to specific targets instead
# of modifying this function.
function(APPLY_STANDARD_SETTINGS TARGET)
  target_compile_features(${TARGET} PUBLIC cxx_std_14)
  target_compile_options(${TARGET} PRIVATE -Wall -Werror)
  target_compile_options(${TARGET} PRIVATE "$<$<NOT:$<CONFIG:Debug>>:-O3>")
  target_compile_definitions(${TARGET} PRIVATE "$<$<NOT:$<CONFIG:Debug>>:NDEBUG>")
endfunction()

# Flutter library and tool build rules.
set(FLUTTER_MANAGED_DIR "${CMAKE_CURRENT_SOURCE_DIR}/flutter")
add_subdirectory(${FLUTTER_MANAGED_DIR})

# System-level dependencies.
find_package(PkgConfig REQUIRED)
pkg_check_modules(GTK REQUIRED IMPORTED_TARGET gtk+-3.0)
# The panel status icon. A hard dependency, and deliberately at configure time:
# the alternative is an app that builds and then cannot show an icon, which is
# harder to diagnose than a build that says what is missing.
pkg_check_modules(APPINDICATOR REQUIRED IMPORTED_TARGET ayatana-appindicator3-0.1)

add_definitions(-DAPPLICATION_ID="${APPLICATION_ID}")

# Define the application target. To change its name, change BINARY_NAME above,
# not the value here, or `flutter run` will no longer work.
#
# Any new source files that you add to the application should be added here.
add_executable(${BINARY_NAME}
  "main.cc"
  "my_application.cc"
  "tray_icon.cc"
  "${FLUTTER_MANAGED_DIR}/generated_plugin_registrant.cc"
)

# Apply the standard set of build settings. This can be removed for applications
# that need different build settings.
apply_standard_settings(${BINARY_NAME})

# Add dependency libraries. Add any application-specific dependencies here.
target_link_libraries(${BINARY_NAME} PRIVATE flutter)
target_link_libraries(${BINARY_NAME} PRIVATE PkgConfig::GTK)
target_link_libraries(${BINARY_NAME} PRIVATE PkgConfig::APPINDICATOR)

# Run the Flutter tool portions of the build. This must not be removed.
add_dependencies(${BINARY_NAME} flutter_assemble)

# Only the install-generated bundle's copy of the executable will launch
# correctly, since the resources must in the right relative locations. To avoid
# people trying to run the unbundled copy, put it in a subdirectory instead of
# the default top-level location.
set_target_properties(${BINARY_NAME}
  PROPERTIES
  RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/intermediates_do_not_run"
)


# Generated plugin build rules, which manage building the plugins and adding
# them to the application.
include(flutter/generated_plugins.cmake)


# === Installation ===
# By default, "installing" just makes a relocatable bundle in the build
# directory.
set(BUILD_BUNDLE_DIR "${PROJECT_BINARY_DIR}/bundle")
# if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
#   set(CMAKE_INSTALL_PREFIX "${BUILD_BUNDLE_DIR}" CACHE PATH "..." FORCE)
# endif()
# Always set the install prefix to the build bundle directory, even if
# CMAKE_INSTALL_PREFIX was set to something else before.
set(CMAKE_INSTALL_PREFIX "${BUILD_BUNDLE_DIR}" CACHE PATH "..." FORCE)

# Start with a clean build bundle directory every time.
install(CODE "
  file(REMOVE_RECURSE \"${BUILD_BUNDLE_DIR}/\")
  " COMPONENT Runtime)

set(INSTALL_BUNDLE_DATA_DIR "${CMAKE_INSTALL_PREFIX}/data")
set(INSTALL_BUNDLE_LIB_DIR "${CMAKE_INSTALL_PREFIX}/lib")

install(TARGETS ${BINARY_NAME} RUNTIME DESTINATION "${CMAKE_INSTALL_PREFIX}"
  COMPONENT Runtime)

install(FILES "${FLUTTER_ICU_DATA_FILE}" DESTINATION "${INSTALL_BUNDLE_DATA_DIR}"
  COMPONENT Runtime)

install(FILES "${FLUTTER_LIBRARY}" DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
  COMPONENT Runtime)

foreach(bundled_library ${PLUGIN_BUNDLED_LIBRARIES})
  install(FILES "${bundled_library}"
    DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
    COMPONENT Runtime)
endforeach(bundled_library)

# The status icon's own libraries, which nothing else here would carry.
#
# `tray_icon.cc` links libayatana-appindicator rather than opening it, so the
# loader needs it present at *startup*: a machine without it does not get an
# app with no status icon, it gets an app that will not start. That is fine for
# the deb and the rpm, where a dependency can be declared, and not fine for the
# AppImage, which is meant to be a single file that runs.
#
# The chain rather than the one name: appindicator pulls in the ayatana
# indicator and ido libraries and both halves of dbusmenu, and bundling only
# the first moves the failure one library along. Resolved by SONAME and
# skipped when not found, because which of these a distribution splits out
# varies and a missing one here should not fail the build — the deb and rpm
# paths do not need any of this.
function(INSTALL_TRAY_LIBRARY library_path)
  if(NOT IS_SYMLINK "${library_path}")
    install(FILES "${library_path}"
      DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
      COMPONENT Runtime)
    return()
  endif()

  # `install(FILES)` can copy only the SONAME symlink returned by
  # `find_library`, leaving its versioned target outside the AppImage. Follow
  # the complete chain at configure time, install the real file, then rebuild
  # every link using only names inside the bundle.
  set(current_path "${library_path}")
  set(visited_paths)
  set(link_names)
  set(link_targets)
  while(IS_SYMLINK "${current_path}")
    list(FIND visited_paths "${current_path}" visited_index)
    if(NOT visited_index EQUAL -1)
      message(FATAL_ERROR "Circular tray library symlink: ${current_path}")
    endif()
    list(APPEND visited_paths "${current_path}")

    execute_process(
      COMMAND readlink "${current_path}"
      RESULT_VARIABLE readlink_result
      OUTPUT_VARIABLE link_target
      OUTPUT_STRIP_TRAILING_WHITESPACE)
    if(NOT readlink_result EQUAL 0 OR link_target STREQUAL "")
      message(FATAL_ERROR "Could not resolve tray library symlink: ${current_path}")
    endif()

    get_filename_component(link_name "${current_path}" NAME)
    get_filename_component(link_dir "${current_path}" DIRECTORY)
    if(IS_ABSOLUTE "${link_target}")
      set(next_path "${link_target}")
    else()
      get_filename_component(next_path "${link_dir}/${link_target}" ABSOLUTE)
    endif()
    get_filename_component(target_name "${next_path}" NAME)
    list(APPEND link_names "${link_name}")
    list(APPEND link_targets "${target_name}")
    set(current_path "${next_path}")
  endwhile()

  install(FILES "${current_path}"
    DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
    COMPONENT Runtime)

  list(LENGTH link_names link_count)
  math(EXPR last_link "${link_count} - 1")
  foreach(link_index RANGE 0 ${last_link})
    list(GET link_names ${link_index} link_name)
    list(GET link_targets ${link_index} target_name)
    install(CODE "
      file(REMOVE \"${INSTALL_BUNDLE_LIB_DIR}/${link_name}\")
      execute_process(
        COMMAND \"${CMAKE_COMMAND}\" -E create_symlink
          \"${target_name}\" \"${INSTALL_BUNDLE_LIB_DIR}/${link_name}\"
        RESULT_VARIABLE tray_symlink_result)
      if(NOT tray_symlink_result EQUAL 0)
        message(FATAL_ERROR \"Failed to create tray library symlink: ${link_name}\")
      endif()
      " COMPONENT Runtime)
  endforeach()
endfunction()

foreach(soname
  "libayatana-appindicator3.so.1"
  "libayatana-indicator3.so.7"
  "libayatana-ido3-0.4.so.0"
  "libdbusmenu-glib.so.4"
  "libdbusmenu-gtk3.so.4"
)
  # `NAMES` with the full SONAME, so what lands in the bundle is the real file
  # under the name the loader will ask for. A `find_library` on the base name
  # answers with the `-dev` symlink, which is not in the bundle to follow.
  find_library(TRAY_LIB_${soname} NAMES "${soname}")
  if(TRAY_LIB_${soname})
    install_tray_library("${TRAY_LIB_${soname}}")
  endif()
endforeach()

# Copy the native assets provided by the build.dart from all packages.
set(NATIVE_ASSETS_DIR "${PROJECT_BUILD_DIR}native_assets/linux/")
install(DIRECTORY "${NATIVE_ASSETS_DIR}"
   DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
   COMPONENT Runtime)

# Fully re-copy the assets directory on each build to avoid having stale files
# from a previous install.
set(FLUTTER_ASSET_DIR_NAME "flutter_assets")
install(CODE "
  file(REMOVE_RECURSE \"${INSTALL_BUNDLE_DATA_DIR}/${FLUTTER_ASSET_DIR_NAME}\")
  " COMPONENT Runtime)
install(DIRECTORY "${PROJECT_BUILD_DIR}/${FLUTTER_ASSET_DIR_NAME}"
  DESTINATION "${INSTALL_BUNDLE_DATA_DIR}" COMPONENT Runtime)

# Install the AOT library on non-Debug builds only.
if(NOT CMAKE_BUILD_TYPE MATCHES "Debug")
  install(FILES "${AOT_LIBRARY}" DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
    COMPONENT Runtime)
endif()
