cmake_minimum_required (VERSION 3.10)
project(ggwave VERSION 0.4.2)

set(GGWAVE_VERSION_PYTHON 0.4.2)

set(CMAKE_EXPORT_COMPILE_COMMANDS "on")
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
set(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/lib")

if(CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
    set(GGWAVE_STANDALONE ON)
    include(cmake/GitVars.cmake)
    include(cmake/BuildTypes.cmake)

    # configure project version
    configure_file(${CMAKE_SOURCE_DIR}/README-tmpl.md                        ${CMAKE_SOURCE_DIR}/README.md @ONLY)
    configure_file(${CMAKE_SOURCE_DIR}/bindings/python/setup-tmpl.py         ${CMAKE_SOURCE_DIR}/bindings/python/setup.py @ONLY)
    configure_file(${CMAKE_SOURCE_DIR}/bindings/javascript/package-tmpl.json ${CMAKE_SOURCE_DIR}/bindings/javascript/package.json @ONLY)
    configure_file(${CMAKE_SOURCE_DIR}/bindings/ios/Makefile-tmpl            ${CMAKE_SOURCE_DIR}/bindings/ios/Makefile @ONLY)
else()
    set(GGWAVE_STANDALONE OFF)
endif()

if (EMSCRIPTEN)
    set(GGWAVE_SUPPORT_SDL2_DEFAULT ON)
    set(BUILD_SHARED_LIBS_DEFAULT OFF)

    option(GGWAVE_WASM_SINGLE_FILE "ggwave: embed WASM inside the generated ggwave.js" ON)
else()
    set(GGWAVE_SUPPORT_SDL2_DEFAULT ON)
    if (WIN32)
        set(BUILD_SHARED_LIBS_DEFAULT OFF)
    else()
        set(BUILD_SHARED_LIBS_DEFAULT ON)
    endif()
endif()

# options

option(BUILD_SHARED_LIBS              "ggwave: build shared libs" ${BUILD_SHARED_LIBS_DEFAULT})
option(USE_FINDSDL2                   "ggwave: use the FindSDL2.cmake script" OFF)

option(GGWAVE_ALL_WARNINGS            "ggwave: enable all compiler warnings" ON)
option(GGWAVE_ALL_WARNINGS_3RD_PARTY  "ggwave: enable all compiler warnings in 3rd party libs" ON)

option(GGWAVE_SANITIZE_THREAD         "ggwave: enable thread sanitizer" OFF)
option(GGWAVE_SANITIZE_ADDRESS        "ggwave: enable address sanitizer" OFF)
option(GGWAVE_SANITIZE_UNDEFINED      "ggwave: enable undefined sanitizer" OFF)

option(GGWAVE_SUPPORT_SDL2            "ggwave: support for libSDL2" ${GGWAVE_SUPPORT_SDL2_DEFAULT})
option(GGWAVE_SUPPORT_PYTHON          "ggwave: support for python" OFF)
option(GGWAVE_SUPPORT_SWIFT           "ggwave: support for swift" OFF)

option(GGWAVE_BUILD_TESTS             "ggwave: build examples" ${GGWAVE_STANDALONE})
option(GGWAVE_BUILD_EXAMPLES          "ggwave: build examples" ${GGWAVE_STANDALONE})

# sanitizers

if (GGWAVE_SANITIZE_THREAD)
    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fsanitize=thread")
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=thread")
endif()

if (GGWAVE_SANITIZE_ADDRESS)
    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fsanitize=address -fno-omit-frame-pointer -D_GLIBCXX_DEBUG")
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=address -fno-omit-frame-pointer -D_GLIBCXX_DEBUG")
endif()

if (GGWAVE_SANITIZE_UNDEFINED)
    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fsanitize=undefined")
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=undefined")
endif()

# dependencies

# main

set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

if (GGWAVE_ALL_WARNINGS)
    if (CMAKE_COMPILER_IS_GNUCC OR CMAKE_CXX_COMPILER_ID MATCHES "Clang")
        set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wextra")
        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -pedantic")
    else()
        # todo : windows
    endif()
endif()

add_subdirectory(src)
add_subdirectory(bindings)

if (GGWAVE_BUILD_TESTS)
    enable_testing()
    add_subdirectory(tests)
endif()

if (GGWAVE_BUILD_EXAMPLES)
    add_subdirectory(examples)
endif()



set(CPACK_COMPONENTS_GROUPING ALL_COMPONENTS_IN_ONE)
set(CPACK_DEB_COMPONENT_INSTALL YES)
set(CPACK_DEBIAN_FILE_NAME DEB-DEFAULT)
set(CPACK_DEBIAN_PACKAGE_DEPENDS "libc6")
set(CPACK_DEBIAN_PACKAGE_HOMEPAGE "https://github.com/ggerganov/ggwave")
set(CPACK_DEBIAN_PACKAGE_MAINTAINER "Georgi Gerganov")
set(CPACK_DEBIAN_PACKAGE_SHLIBDEPS YES)
set(CPACK_GENERATOR DEB)
SET(CPACK_OUTPUT_FILE_PREFIX "${CMAKE_SOURCE_DIR}/dist")
set(CPACK_PACKAGE_CONTACT "ggerganov@gmail.com")
set(CPACK_PACKAGE_DESCRIPTION_SUMMARY "Tiny data-over-sound library")
set(CPACK_PACKAGE_INSTALL_DIRECTORY ${CPACK_PACKAGE_NAME})
set(CPACK_PACKAGE_NAME "libggwave-dev")
set(CPACK_PACKAGE_VENDOR "ggwave")
set(CPACK_PACKAGE_VERSION_MAJOR ${PROJECT_VERSION_MAJOR})
set(CPACK_PACKAGE_VERSION_MINOR ${PROJECT_VERSION_MINOR})
set(CPACK_PACKAGE_VERSION_PATCH ${PROJECT_VERSION_PATCH})
set(CPACK_RESOURCE_FILE_LICENSE "${CMAKE_CURRENT_SOURCE_DIR}/LICENSE")
set(CPACK_RESOURCE_FILE_README "${CMAKE_CURRENT_SOURCE_DIR}/README.md")
set(CPACK_STRIP_FILES YES)
set(CPACK_VERBATIM_VARIABLES YES)
include(CPack)

set(DEB_PYTHON_BUILD_DIR "${CMAKE_SOURCE_DIR}/bindings/python/")
set(DEB_PYTHON_OUTPUT_FILE_PREFIX "${DEB_PYTHON_BUILD_DIR}/dist")

set(ENV{SOURCE_DATE_EPOCH} "0")
execute_process(
  COMMAND git log -1 --pretty=%ct
  WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
  TIMEOUT 1
  OUTPUT_VARIABLE SOURCE_DATE_EPOCH
  OUTPUT_STRIP_TRAILING_WHITESPACE
)
set(ENV{SOURCE_DATE_EPOCH} ${SOURCE_DATE_EPOCH})

add_custom_target(deb_python_binding
    COMMAND cd ${DEB_PYTHON_BUILD_DIR} && make deb
    COMMENT "Building Debian package for Python binding"
    WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
)

add_custom_target(deb_c_library
    COMMAND SOURCE_DATE_EPOCH=${SOURCE_DATE_EPOCH} cpack 
    COMMENT "Building Debian package for C library"
    WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
)

add_custom_target(deb_python_move
    COMMAND mv ${DEB_PYTHON_OUTPUT_FILE_PREFIX}/*.deb ${CPACK_OUTPUT_FILE_PREFIX}/
    COMMENT "Moving Debian package for Python binding into ${CPACK_OUTPUT_FILE_PREFIX}/"
    WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
    DEPENDS deb_python_binding deb_c_library
)

add_custom_target(deb
    COMMAND sha256sum ${CPACK_OUTPUT_FILE_PREFIX}/* 
    COMMENT "Debian package sha256 hashes"
    DEPENDS deb_c_library deb_python_binding deb_python_move
    WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
)

add_custom_command(TARGET deb
    POST_BUILD
    COMMAND ls -alh ${CPACK_OUTPUT_FILE_PREFIX}/* 
    COMMENT "SOURCE_DATE_EPOCH=${SOURCE_DATE_EPOCH}"
    WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
)