# 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 "linthra")
# The unique GTK application identifier for this application. See:
# https://wiki.gnome.org/HowDoI/ChooseApplicationID
set(APPLICATION_ID "io.github.thezupzup.linthra")

# 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)

# 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)

# 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"
)


# === Bundled SQLite, without a build-time download ===
#
# `sqlite3_flutter_libs` compiles the SQLite amalgamation into the app so the
# Drift catalog runs on the same engine, with the same compile flags (FTS5,
# math functions, session/preupdate hooks), that Android already uses. On Linux
# its own CMake pulls that amalgamation from sqlite.org with FetchContent at
# *configure* time.
#
# That download is harmless on a developer machine with a network, and it is a
# problem everywhere else: a sandboxed CI runner, an air-gapped build, and —
# the one that matters for where Linthra is going — flatpak-builder, which runs
# the build with networking disabled. Flathub expects every source to be
# declared in the manifest and fetched up front.
#
# LINTHRA_SQLITE3_SOURCE_DIR is the seam for that. Point it at an already
# unpacked amalgamation (a directory containing `sqlite3.c`) and the fetch is
# satisfied locally. It works through CMake's own
# FETCHCONTENT_SOURCE_DIR_<NAME> hook, so the plugin is never patched or
# vendored: leave the variable unset and the build is byte-for-byte the
# upstream one. See docs/linux-desktop.md.
set(LINTHRA_SQLITE3_SOURCE_DIR "$ENV{LINTHRA_SQLITE3_SOURCE_DIR}" CACHE PATH
  "Directory holding an already-unpacked SQLite amalgamation (sqlite3.c). \
Set this to build without fetching SQLite from sqlite.org.")
if(LINTHRA_SQLITE3_SOURCE_DIR)
  if(NOT EXISTS "${LINTHRA_SQLITE3_SOURCE_DIR}/sqlite3.c")
    message(FATAL_ERROR
      "LINTHRA_SQLITE3_SOURCE_DIR is set to '${LINTHRA_SQLITE3_SOURCE_DIR}' "
      "but there is no sqlite3.c there. It must point at an unpacked SQLite "
      "amalgamation.")
  endif()
  # FORCE: the plugin's FetchContent_Declare runs later in this same configure,
  # and only a cache entry that is already set wins over it.
  set(FETCHCONTENT_SOURCE_DIR_SQLITE3 "${LINTHRA_SQLITE3_SOURCE_DIR}"
    CACHE PATH "SQLite source supplied by Linthra." FORCE)
  message(STATUS
    "Linthra: using pre-fetched SQLite from ${LINTHRA_SQLITE3_SOURCE_DIR}")
endif()

# media_kit_libs_linux otherwise downloads and compiles mimalloc while CMake is
# building the app. Linthra does not need the optional allocator override, and
# flatpak-builder is network-isolated, so disable it before generated plugin
# CMake is included. Playback uses the declared system/Flatpak libmpv runtime.
set(MIMALLOC_USE_STATIC_LIBS OFF CACHE BOOL
  "Do not download media_kit's optional mimalloc allocator." FORCE)

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


# flutter_secure_storage_linux 1.2.3 bundles an older nlohmann json.hpp whose
# literal-operator declarations trigger Clang's deprecated-literal-operator
# warning. APPLY_STANDARD_SETTINGS promotes every warning to an error, so Clang
# 22 cannot compile that otherwise-valid upstream plugin.
#
# flutter_secure_storage 10 fixes the header, but also rewrites Android secure
# storage defaults and migration. Keep PR 2 from changing Android credentials:
# preserve -Werror everywhere and demote only this diagnostic, only for this
# plugin target. Remove this exception when the storage major is upgraded with
# dedicated Android migration coverage.
if(TARGET flutter_secure_storage_linux_plugin AND
   CMAKE_CXX_COMPILER_ID MATCHES "Clang")
  target_compile_options(flutter_secure_storage_linux_plugin PRIVATE
    -Wno-error=deprecated-literal-operator)
endif()

# === 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)

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()
