# We can't build glog with gflags, unless gflags is pre-installed.
# If build glog with pre-installed gflags, there will be conflict.

set(OPENFST_ROOT ${LIB_BASE_DIR}/openfst-build)
# We can't build glog with gflags, unless gflags is pre-installed.
# If build glog with pre-installed gflags, there will be conflict.
include(gflags)
if(TARGET gflags)
    message(STATUS "${BoldGreen}Find Package gflags: ${gflags_FOUND}${ColourReset}")
    set_target_properties(gflags PROPERTIES INTERFACE_COMPILE_OPTIONS "-fPIC")
endif()
set(WITH_GFLAGS OFF CACHE BOOL "whether build glog with gflags" FORCE)
include(glog)
# 推荐手动构建这个openfst依赖，因为通过cmake构建这个库会失败。
function(GRPC_INSTALL)
    # 推荐手动去构建项目，不然这些代码因为环境不兼容等原因会执行不成功
    message(STATUS "${BoldGreen}Install openfst: ${GLOG_BUILD_DIR}${ColourReset}")
    if(NOT EXISTS ${OPENFST_ROOT})
        execute_process(COMMAND mkdir -p "${OPENFST_ROOT}")
    else ()
        execute_process(COMMAND rm -rf "${OPENFST_ROOT}/*")
    endif ()
    # patch补丁必须打，不然会报glog无法动态识别这个库的方法，导致链接不成功。
    execute_process(
            COMMAND cmake -E copy_directory ${CMAKE_CURRENT_SOURCE_DIR}/patch/openfst ${LIB_BASE_DIR}/openfst-src
            WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})

    message(STATUS "${BoldGreen}configure openfst${ColourReset}")
    #./configure --prefix=${openfst_SOURCE_DIR}/build --enable-static --disable-shared --with-pic
    execute_process(
            COMMAND ./configure --prefix=${OPENFST_ROOT} --with-pic
            WORKING_DIRECTORY ${LIB_BASE_DIR}/openfst-src )

    message(STATUS "${BoldGreen}copy openfst patch done!${ColourReset}")
    execute_process(
            COMMAND make -j4
            WORKING_DIRECTORY ${LIB_BASE_DIR}/openfst-src
            RESULT_VARIABLE configure_result
    )
    if(configure_result)
        message(FATAL_ERROR "${BoldRed}openfst项目构建不成功！ ${ColourReset}")
    endif ()
    execute_process(
            COMMAND make --install
            WORKING_DIRECTORY ${LIB_BASE_DIR}/openfst-src)
endfunction()
if(LIB_BASE_DIR)
    # 下面这堆关键字是防止cmake出一堆无关的提示
    if(NOT GRAPH_TOOLS)
        set(HAVE_BIN OFF CACHE BOOL "Build the fst binaries" FORCE)
        set(HAVE_SCRIPT OFF CACHE BOOL "Build the fstscript" FORCE)
    endif()
    set(HAVE_COMPACT OFF CACHE BOOL "Build compact" FORCE)
    set(HAVE_CONST OFF CACHE BOOL "Build const" FORCE)
    set(HAVE_GRM OFF CACHE BOOL "Build grm" FORCE)
    set(HAVE_FAR OFF CACHE BOOL "Build far" FORCE)
    set(HAVE_PDT OFF CACHE BOOL "Build pdt" FORCE)
    set(HAVE_MPDT OFF CACHE BOOL "Build mpdt" FORCE)
    set(HAVE_LINEAR OFF CACHE BOOL "Build linear" FORCE)
    set(HAVE_LOOKAHEAD OFF CACHE BOOL "Build lookahead" FORCE)
    set(HAVE_NGRAM OFF CACHE BOOL "Build ngram" FORCE)
    set(HAVE_SPECIAL OFF CACHE BOOL "Build special" FORCE)
else ()
    message(FATAL_ERROR "${BoldRed}LIB_BASE_DIR for openfst is not set! ${ColourReset}")
endif ()


find_path(OPENFST_INCLUDE_DIR fst/fst.h PATHS ${OPENFST_ROOT}/include)
find_path(OPENFST_BINARY_DIR fstsymbols PATHS ${OPENFST_ROOT}/bin)
find_path(OPENFST_LIBRARY_DIR libfst.a PATHS ${OPENFST_ROOT}/lib)
find_library(fst NAMES fst PATHS ${OPENFST_ROOT}/lib)
set(OPENFST_LIBRARYS fst ${GFLAGS_LIBRARY_NOTHREADS} ${GLOG_LIBRARY} dl)
#验证库和文件是否被找到
include(${CMAKE_ROOT}/Modules/FindPackageHandleStandardArgs.cmake)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(Openfst DEFAULT_MSG
        OPENFST_INCLUDE_DIR OPENFST_BINARY_DIR fst GFLAGS_LIBRARY_NOTHREADS GFLAGS_LIBRARY GLOG_LIBRARY OPENFST_LIBRARY_DIR)
message("${BoldGreen}
        OPENFST_INCLUDE_DIR: ${OPENFST_INCLUDE_DIR}
        OPENFST_BINARY_DIR: ${OPENFST_BINARY_DIR}
        OPENFST_LIBRARY_DIR: ${OPENFST_LIBRARY_DIR}
        IMPORTED OPENFST_LIBRARYS: ${OPENFST_LIBRARYS}${ColourReset}")

if(third_party_libraries)
    list(APPEND third_party_libraries $(OPENFST_LIBRARYS) )
endif ()