# Project-level configuration.
cmake_minimum_required(VERSION 3.13)
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 "chanora_flutter")
# The unique GTK application identifier for this application. See:
# https://wiki.gnome.org/HowDoI/ChooseApplicationID
set(APPLICATION_ID "app.chanora.chanora_flutter")

# Repository root for Rust bridge builds / bundle staging.
set(CHANORA_REPO_ROOT "${CMAKE_CURRENT_SOURCE_DIR}/../../..")

# Optional path to a Linux ONNX Runtime shared library for Silero VAD.
# When set, the bundle carries a local `lib/libonnxruntime.so` sidecar and the
# runner exports `ORT_DYLIB_PATH` to that file before Flutter starts.
set(CHANORA_ONNXRUNTIME_SHARED_LIB "$ENV{CHANORA_ONNXRUNTIME_SHARED_LIB}" CACHE FILEPATH
  "Absolute path to libonnxruntime.so for Linux bundle packaging")

# Optional path to a prebuilt Rust bridge shared library. When unset, the Linux
# bundle build runs `cargo build -p chanora_bridge` for the host profile and
# stages the resulting `libchanora_bridge.so` automatically.
set(CHANORA_BRIDGE_SHARED_LIB "$ENV{CHANORA_BRIDGE_SHARED_LIB}" CACHE FILEPATH
  "Absolute path to libchanora_bridge.so for Linux bundle packaging")

# 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)
find_program(CARGO_EXECUTABLE cargo REQUIRED)

# Application build; see runner/CMakeLists.txt.
add_subdirectory("runner")

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

if(CMAKE_BUILD_TYPE MATCHES "Debug")
  set(CHANORA_BRIDGE_PROFILE_DIR "debug")
  set(CHANORA_BRIDGE_CARGO_ARGS build --package chanora_bridge)
else()
  set(CHANORA_BRIDGE_PROFILE_DIR "release")
  set(CHANORA_BRIDGE_CARGO_ARGS build --release --package chanora_bridge)
endif()

if(CHANORA_BRIDGE_SHARED_LIB)
  set(CHANORA_BRIDGE_STAGED_LIB "${CHANORA_BRIDGE_SHARED_LIB}")
else()
  set(CHANORA_BRIDGE_STAGED_LIB
    "${CHANORA_REPO_ROOT}/target/${CHANORA_BRIDGE_PROFILE_DIR}/libchanora_bridge.so")
  add_custom_target(chanora_bridge_bundle
    COMMAND "${CARGO_EXECUTABLE}" ${CHANORA_BRIDGE_CARGO_ARGS}
    WORKING_DIRECTORY "${CHANORA_REPO_ROOT}"
    COMMENT "Building chanora_bridge for Linux bundle"
    VERBATIM)
  add_dependencies(${BINARY_NAME} chanora_bridge_bundle)
endif()

# 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()

# 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)

if(EXISTS "${CHANORA_BRIDGE_STAGED_LIB}")
  install(FILES "${CHANORA_BRIDGE_STAGED_LIB}"
    DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
    COMPONENT Runtime)
else()
  message(WARNING
    "Chanora bridge shared library was not found for Linux bundling: "
    "${CHANORA_BRIDGE_STAGED_LIB}")
endif()

if(CHANORA_ONNXRUNTIME_SHARED_LIB)
  if(EXISTS "${CHANORA_ONNXRUNTIME_SHARED_LIB}")
    install(FILES "${CHANORA_ONNXRUNTIME_SHARED_LIB}"
      DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
      RENAME "libonnxruntime.so"
      COMPONENT Runtime)
  else()
    message(WARNING
      "CHANORA_ONNXRUNTIME_SHARED_LIB was set but the file was not found: "
      "${CHANORA_ONNXRUNTIME_SHARED_LIB}")
  endif()
endif()

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

# 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()