# This file controls Flutter-level build steps. It should not be edited.
cmake_minimum_required(VERSION 3.14)

set(EPHEMERAL_DIR "${CMAKE_CURRENT_SOURCE_DIR}/ephemeral")

# Configuration provided via flutter tool.
include(${EPHEMERAL_DIR}/generated_config.cmake)

# TODO: Move the rest of this into files in ephemeral. See
# https://github.com/flutter/flutter/issues/57146.
set(WRAPPER_ROOT "${EPHEMERAL_DIR}/cpp_client_wrapper")

# === Flutter Library ===
set(FLUTTER_LIBRARY "${EPHEMERAL_DIR}/flutter_windows.dll")

# Published to parent scope for install step.
set(FLUTTER_LIBRARY ${FLUTTER_LIBRARY} PARENT_SCOPE)
set(FLUTTER_ICU_DATA_FILE "${EPHEMERAL_DIR}/icudtl.dat" PARENT_SCOPE)
set(PROJECT_BUILD_DIR "${PROJECT_DIR}/build/" PARENT_SCOPE)
set(AOT_LIBRARY "${PROJECT_DIR}/build/windows/app.so" PARENT_SCOPE)

list(APPEND FLUTTER_LIBRARY_HEADERS
        "flutter_export.h"
        "flutter_windows.h"
        "flutter_messenger.h"
        "flutter_plugin_registrar.h"
        "flutter_texture_registrar.h"
        )
list(TRANSFORM FLUTTER_LIBRARY_HEADERS PREPEND "${EPHEMERAL_DIR}/")
add_library(flutter INTERFACE)
target_include_directories(flutter INTERFACE
        "${EPHEMERAL_DIR}"
        )
target_link_libraries(flutter INTERFACE "${FLUTTER_LIBRARY}.lib")
add_dependencies(flutter flutter_assemble)

# === Wrapper ===
list(APPEND CPP_WRAPPER_SOURCES_CORE
        "core_implementations.cc"
        "standard_codec.cc"
        )
list(TRANSFORM CPP_WRAPPER_SOURCES_CORE PREPEND "${WRAPPER_ROOT}/")
list(APPEND CPP_WRAPPER_SOURCES_PLUGIN
        "plugin_registrar.cc"
        )
list(TRANSFORM CPP_WRAPPER_SOURCES_PLUGIN PREPEND "${WRAPPER_ROOT}/")
list(APPEND CPP_WRAPPER_SOURCES_APP
        "flutter_engine.cc"
        "flutter_view_controller.cc"
        )
list(TRANSFORM CPP_WRAPPER_SOURCES_APP PREPEND "${WRAPPER_ROOT}/")

# Wrapper sources needed for a plugin.
add_library(flutter_wrapper_plugin STATIC
        ${CPP_WRAPPER_SOURCES_CORE}
        ${CPP_WRAPPER_SOURCES_PLUGIN}
        )
apply_standard_settings(flutter_wrapper_plugin)
set_target_properties(flutter_wrapper_plugin PROPERTIES
        POSITION_INDEPENDENT_CODE ON)
set_target_properties(flutter_wrapper_plugin PROPERTIES
        CXX_VISIBILITY_PRESET hidden)
target_link_libraries(flutter_wrapper_plugin PUBLIC flutter)
target_include_directories(flutter_wrapper_plugin PUBLIC
        "${WRAPPER_ROOT}/include"
        )
add_dependencies(flutter_wrapper_plugin flutter_assemble)

# Wrapper sources needed for the runner.
add_library(flutter_wrapper_app STATIC
        ${CPP_WRAPPER_SOURCES_CORE}
        ${CPP_WRAPPER_SOURCES_APP}
        )
apply_standard_settings(flutter_wrapper_app)
target_link_libraries(flutter_wrapper_app PUBLIC flutter)
target_include_directories(flutter_wrapper_app PUBLIC
        "${WRAPPER_ROOT}/include"
        )
add_dependencies(flutter_wrapper_app flutter_assemble)

# === Flutter tool backend ===
# _phony_ is a non-existent file to force this command to run every time,
# since currently there's no way to get a full input/output list from the
# flutter tool.
set(PHONY_OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/_phony_")
set_source_files_properties("${PHONY_OUTPUT}" PROPERTIES SYMBOLIC TRUE)
add_custom_command(
        OUTPUT ${FLUTTER_LIBRARY} ${FLUTTER_LIBRARY_HEADERS}
        ${CPP_WRAPPER_SOURCES_CORE} ${CPP_WRAPPER_SOURCES_PLUGIN}
        ${CPP_WRAPPER_SOURCES_APP}
        ${PHONY_OUTPUT}
        COMMAND ${CMAKE_COMMAND} -E env
        ${FLUTTER_TOOL_ENVIRONMENT}
        "${FLUTTER_ROOT}/packages/flutter_tools/bin/tool_backend.bat"
        windows-x64 $<CONFIG>
        VERBATIM
)
add_custom_target(flutter_assemble DEPENDS
        "${FLUTTER_LIBRARY}"
        ${FLUTTER_LIBRARY_HEADERS}
        ${CPP_WRAPPER_SOURCES_CORE}
        ${CPP_WRAPPER_SOURCES_PLUGIN}
        ${CPP_WRAPPER_SOURCES_APP}
        )
