cmake_minimum_required(VERSION 3.2.2)
project(Parsodus VERSION 1.0)

set(CMAKE_CXX_STANDARD 14)
set(CMAKE_CXX_STANDARD_REQUIRED 14)

set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CMAKE_CURRENT_SOURCE_DIR}/cmake)

include(ExternalProject)
find_package(mstch QUIET)

if (NOT mstch_FOUND)
    ExternalProject_Add(ext-mstch
        GIT_REPOSITORY https://github.com/no1msd/mstch
        GIT_TAG 1.0.2
        #The following line is a dirty hack
        #to prevent cmake from needlessly clone any submodule
        #inspect `ext-mstch-prefix/tmp/ext-mstch-gitclone.cmake` for more info
        GIT_SUBMODULES "NONE\ COMMAND\ true\ ERROR_QUIET"
        CMAKE_ARGS -DWITH_UNIT_TESTS=NO
        INSTALL_COMMAND ""
        )

    add_library(mstch::mstch IMPORTED STATIC GLOBAL)
    add_dependencies(mstch::mstch ext-mstch)

    ExternalProject_Get_Property(ext-mstch source_dir binary_dir)
    set_target_properties(mstch::mstch PROPERTIES "IMPORTED_LOCATION" "${binary_dir}/src/${CMAKE_STATIC_LIBRARY_PREFIX}mstch${CMAKE_STATIC_LIBRARY_SUFFIX}")
    include_directories(${source_dir}/include)
endif()

ExternalProject_Add(ext-optparse
    GIT_REPOSITORY https://github.com/myint/optparse
    CONFIGURE_COMMAND ""
    BUILD_COMMAND ""
    INSTALL_COMMAND ""
    )

ExternalProject_Get_Property(ext-optparse source_dir)
include_directories(${source_dir})

find_program(LEXESIS_EXE Lexesis)
if (NOT LEXESIS_EXE_FOUND)
    #Lexesis
    ExternalProject_Add(ext-lexesis
        GIT_REPOSITORY git@gitlab.com:Robin_Jadoul/Lexesis.git
        )
    add_library(templ IMPORTED STATIC GLOBAL)
    add_dependencies(templ ext-lexesis)
    ExternalProject_Get_Property(ext-lexesis binary_dir source_dir)
    set_target_properties(templ PROPERTIES "IMPORTED_LOCATION" "${binary_dir}/src/${CMAKE_STATIC_LIBRARY_PREFIX}templ${CMAKE_STATIC_LIBRARY_SUFFIX}")
    include_directories(${source_dir}/include)
    set(LEXESIS_EXE "${binary_dir}/bin/Lexesis")
endif()

#Enable code coverage on debug
if(CMAKE_BUILD_TYPE MATCHES Debug)
    option(USE_SYSTEM_LCOV "Use the lcov version found on the system, if available" YES)
    include(CodeCoverage)
    if (NOT LCOV_PATH OR NOT USE_SYSTEM_LCOV)
        ExternalProject_Add(ext-lcov
            GIT_REPOSITORY https://github.com/linux-test-project/lcov
            CONFIGURE_COMMAND ""
            BUILD_COMMAND ""
            INSTALL_COMMAND ""
            TEST_COMMAND "")
        if (${CMAKE_VERSION} STRGREATER "3.0.1")
            set_target_properties(ext-lcov PROPERTIES EXCLUDE_FROM_ALL 1)
        endif()
        ExternalProject_Get_Property(ext-lcov source_dir)
        set(LCOV_PATH "${source_dir}/bin/lcov")
        set(GENHTML_PATH "${source_dir}/bin/genhtml")
    endif()
    SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g -O0 -fprofile-arcs -ftest-coverage")
endif()

option(USE_SYSTEM_GTEST "Use the google test framework installed on the system, if available" YES)
find_package(GTest)
if (NOT GTEST_FOUND OR NOT USE_SYSTEM_GTEST)
    #Google test framework
    ExternalProject_Add(ext-gtest
        GIT_REPOSITORY https://github.com/google/googletest.git
        CMAKE_ARGS -DBUILD_GMOCK=NO -DBUILD_GTEST=YES
        INSTALL_COMMAND ""
        )
    add_library(gtest IMPORTED STATIC GLOBAL)
    add_dependencies(gtest ext-gtest)
    add_library(gtest_main IMPORTED STATIC GLOBAL)
    add_dependencies(gtest_main ext-gtest)

    ExternalProject_Get_Property(ext-gtest source_dir binary_dir)

    find_package(Threads)
    set_target_properties(gtest PROPERTIES
        "IMPORTED_LOCATION" "${binary_dir}/googletest/${CMAKE_STATIC_LIBRARY_PREFIX}gtest${CMAKE_STATIC_LIBRARY_SUFFIX}"
        "IMPORTED_LINK_INTERFACE_LIBRARIES" "${CMAKE_THREAD_LIBS_INIT}"
        )

    set_target_properties(gtest_main PROPERTIES
        "IMPORTED_LOCATION" "${binary_dir}/googletest/${CMAKE_STATIC_LIBRARY_PREFIX}gtest_main${CMAKE_STATIC_LIBRARY_SUFFIX}"
        "IMPORTED_LINK_INTERFACE_LIBRARIES" "${CMAKE_THREAD_LIBS_INIT}"
        )
    include_directories(${source_dir}/googletest/include)
    set(GTEST_LIBRARIES gtest)
    set(GTEST_BOTH_LIBRARIES gtest_main gtest)
else()
    find_package(GTest REQUIRED)
    find_package(Threads REQUIRED)
    include_directories(GTEST_INCLUDE_DIRS)
    set(GTEST_BOTH_LIBRARIES gtest_main gtest ${CMAKE_THREAD_LIBS_INIT})
endif()

##########################################

find_package(Doxygen)
if(DOXYGEN_FOUND)
    configure_file(${CMAKE_CURRENT_SOURCE_DIR}/Doxyfile.in ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile @ONLY)
    add_custom_target(doc ${DOXYGEN_EXECUTABLE} ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR} COMMENT "Generating API documentation" VERBATIM)
endif(DOXYGEN_FOUND)

set(CMAKE_INSTALL_PREFIX "${CMAKE_CURRENT_BINARY_DIR}")

##Warning level
if (${CMAKE_CXX_COMPILER_ID} STREQUAL "GNU" OR ${CMAKE_CXX_COMPILER_ID} STREQUAL "Clang")
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -pedantic")
elseif (${CMAKE_CXX_COMPILER_ID} STREQUAL "MSVC")
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W4")
endif()

include_directories(include)
add_subdirectory(src)
add_dependencies(Parsodus ext-optparse)
enable_testing()
add_subdirectory(tests)
add_subdirectory(examples)

install(DIRECTORY templates
    DESTINATION share/Parsodus
    )

# add_subdirectory(examples)