# MIT License
#
# Copyright (c) 2016-2022 The ZLMediaKit project authors. All Rights Reserved.
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
#

cmake_minimum_required(VERSION 3.1.3)

# 加载自定义模块
list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")

project(ZLMediaKit LANGUAGES C CXX)

# 使能 C++11
set(CMAKE_CXX_STANDARD 11)

option(ENABLE_API "Enable C API SDK" ON)
option(ENABLE_API_STATIC_LIB "Enable mk_api static lib" OFF)
option(ENABLE_ASAN "Enable Address Sanitize" OFF)
option(ENABLE_CXX_API "Enable C++ API SDK" OFF)
option(ENABLE_FAAC "Enable FAAC" OFF)
option(ENABLE_FFMPEG "Enable FFmpeg" OFF)
option(ENABLE_HLS "Enable HLS" ON)
option(ENABLE_JEMALLOC_STATIC "Enable static linking to the jemalloc library" OFF)
option(ENABLE_MEM_DEBUG "Enable Memory Debug" OFF)
option(ENABLE_MP4 "Enable MP4" ON)
option(ENABLE_MSVC_MT "Enable MSVC Mt/Mtd lib" ON)
option(ENABLE_MYSQL "Enable MySQL" OFF)
option(ENABLE_OPENSSL "Enable OpenSSL" ON)
option(ENABLE_PLAYER "Enable Player" ON)
option(ENABLE_RTPPROXY "Enable RTPPROXY" ON)
option(ENABLE_SERVER "Enable Server" ON)
option(ENABLE_SERVER_LIB "Enable server as android static library" OFF)
option(ENABLE_SRT "Enable SRT" ON)
option(ENABLE_TESTS "Enable Tests" ON)
option(ENABLE_WEBRTC "Enable WebRTC" ON)
option(ENABLE_X264 "Enable x264" OFF)
option(ENABLE_WEPOLL "Enable wepoll" OFF)

option(USE_SOLUTION_FOLDERS "Enable solution dir supported" ON)

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

if("${CMAKE_BUILD_TYPE}" STREQUAL "")
  set(CMAKE_BUILD_TYPE "Debug")
endif()

message(STATUS "编译类型: ${CMAKE_BUILD_TYPE}")

# 方便排查编译问题, 需要 FORCE CACHE, 否则需要命令行设置才生效
set(CMAKE_VERBOSE_MAKEFILE ON CACHE INTERNAL "" FORCE)

# TODO: include 当前目录会导致 server 编译出错, 待排除
set(CMAKE_INCLUDE_CURRENT_DIR OFF)

# 安装路径
if(NOT CMAKE_INSTALL_PREFIX)
  if(UNIX)
    set(INSTALL_PATH_LIB     lib${LIB_SUFFIX})
    set(INSTALL_PATH_INCLUDE include)
    set(INSTALL_PATH_RUNTIME bin)
  elseif(WIN32)
    # Windows 下安装到了用户主目录下?
    set(INSTALL_PATH_LIB     $ENV{HOME}/${CMAKE_PROJECT_NAME}/lib)
    set(INSTALL_PATH_INCLUDE $ENV{HOME}/${CMAKE_PROJECT_NAME}/include)
  else()
    message(WARNING "该平台(${CMAKE_SYSTEM_NAME})下暂未设置安装路径")
  endif()
else()
  set(INSTALL_PATH_LIB     ${CMAKE_INSTALL_PREFIX}/lib${LIB_SUFFIX})
  set(INSTALL_PATH_INCLUDE ${CMAKE_INSTALL_PREFIX}/include)
  set(INSTALL_PATH_RUNTIME ${CMAKE_INSTALL_PREFIX}/bin)
endif()

string(TOLOWER ${CMAKE_SYSTEM_NAME} SYSTEM_NAME_LOWER)
# 设置输出目录, 包括 bin, lib 以及其他文件
# Windows 也不再区分 32/64
set(OUTPUT_DIR ${CMAKE_CURRENT_SOURCE_DIR}/release/${SYSTEM_NAME_LOWER}/${CMAKE_BUILD_TYPE})
set(LIBRARY_OUTPUT_PATH    ${OUTPUT_DIR})
set(EXECUTABLE_OUTPUT_PATH ${OUTPUT_DIR})

# 添加 git 版本信息
set(COMMIT_HASH "Git_NotFound_Unkown_commit")
set(BRANCH_NAME "Git_NotFound_Unkown_branch")
set(BUILD_TIME "")

string(TIMESTAMP BUILD_TIME "%Y-%m-%d %H:%M:%S")

find_package(Git QUIET)
if(GIT_FOUND)
  execute_process(
    COMMAND ${GIT_EXECUTABLE} rev-parse --short=7 HEAD
    OUTPUT_VARIABLE COMMIT_HASH
    OUTPUT_STRIP_TRAILING_WHITESPACE
    ERROR_QUIET
    WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
  execute_process(
    COMMAND ${GIT_EXECUTABLE} symbolic-ref --short -q HEAD
    OUTPUT_VARIABLE BRANCH_NAME
    OUTPUT_STRIP_TRAILING_WHITESPACE
    ERROR_QUIET
    WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
endif()

configure_file(
  ${CMAKE_CURRENT_SOURCE_DIR}/version.h.ini
  ${CMAKE_CURRENT_BINARY_DIR}/version.h
  @ONLY)

message(STATUS "Git version is ${BRANCH_NAME}:${COMMIT_HASH}:${BUILD_TIME}")

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

# 方便修改全局变量
function(update_cached name value)
  set("${name}" "${value}" CACHE INTERNAL "*** Internal ***" FORCE)
endfunction()

function(update_cached_list name)
  set(_tmp_list "${${name}}")
  list(APPEND _tmp_list "${ARGN}")
  list(REMOVE_DUPLICATES _tmp_list)
  update_cached(${name} "${_tmp_list}")
endfunction()

# TODO:
function(set_file_group prefix)
  message(STATUS "set_file_group " ${prefix} " " ${ARGC})
  foreach(FILE IN LISTS ARGN 1)
    # Get the directory of the source file
    get_filename_component(PARENT_DIR "${FILE}" DIRECTORY)

    # Remove common directory prefix to make the group
    string(REPLACE "${prefix}" "" GROUP "${PARENT_DIR}")

    # Make sure we are using windows slashes
    string(REPLACE "/" "\\" GROUP "${GROUP}")

    source_group("${GROUP}" FILES "${FILE}")
  endforeach()
endfunction()


find_program(CCACHE_FOUND ccache)
if(CCACHE_FOUND)
  set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE ccache)
  set_property(GLOBAL PROPERTY RULE_LAUNCH_LINK    ccache)
endif()

if(UNIX)
  # UNIX/Linux/Darwin
  set(COMPILE_OPTIONS_DEFAULT
    "-fPIC"
    "-Wall;-Wextra"
    "-Wno-unused-function;-Wno-unused-parameter;-Wno-unused-variable"
    "-Wno-error=extra;-Wno-error=missing-field-initializers;-Wno-error=type-limits")
elseif(WIN32)
  if (MSVC)
    set(COMPILE_OPTIONS_DEFAULT
            # TODO: /wd4819 应该是不会生效
            "/wd4566;/wd4819"
            # warning C4530: C++ exception handler used, but unwind semantics are not enabled.
            "/EHsc")
    # disable Windows logo
    list(APPEND COMPILE_OPTIONS_DEFAULT "/nologo")
    list(APPEND CMAKE_STATIC_LINKER_FLAGS "/nologo")
  endif()
endif()

if(CMAKE_HOST_SYSTEM_NAME STREQUAL "Darwin")
  if(CMAKE_HOST_SYSTEM_PROCESSOR STREQUAL "arm64")
    include_directories(SYSTEM "/opt/homebrew/include")
  endif()
endif()

# mediakit 以及各个 runtime 依赖
update_cached_list(MK_LINK_LIBRARIES "")
update_cached_list(MK_COMPILE_DEFINITIONS ENABLE_VERSION)

if(CMAKE_SYSTEM_NAME MATCHES "Linux")
  include(CheckCXXSourceCompiles)
  file(READ ${CMAKE_CURRENT_SOURCE_DIR}/cmake/checks/atomic_check.cpp atomic_check_cpp)
  check_cxx_source_compiles("${atomic_check_cpp}" HAVE_CXX_ATOMICS_WITHOUT_LIB)
  if(NOT HAVE_CXX_ATOMICS_WITHOUT_LIB)
    # cmake --help-policy CMP0075
    list(APPEND CMAKE_REQUIRED_LIBRARIES "atomic")
    check_cxx_source_compiles("${atomic_check_cpp}" HAVE_CXX_ATOMICS_WITH_LIB)
    if(NOT HAVE_CXX_ATOMICS_WITH_LIB)
      message(WARNING "Compiler doesn't support std::atomic<long long>")
    else()
      update_cached_list(MK_LINK_LIBRARIES atomic)
    endif()
  endif()
endif()

# 多个模块依赖 ffmpeg 相关库, 统一查找
if(ENABLE_FFMPEG)
  find_package(PkgConfig QUIET)
  # 查找 ffmpeg/libutil 是否安装
  if(PKG_CONFIG_FOUND)
    pkg_check_modules(AVUTIL QUIET IMPORTED_TARGET libavutil)
    if(AVUTIL_FOUND)
      update_cached_list(MK_LINK_LIBRARIES PkgConfig::AVUTIL)
      message(STATUS "found library: ${AVUTIL_LIBRARIES}")
    endif()
  endif()

  # 查找 ffmpeg/libavcodec 是否安装
  if(PKG_CONFIG_FOUND)
    pkg_check_modules(AVCODEC QUIET IMPORTED_TARGET libavcodec)
    if(AVCODEC_FOUND)
      update_cached_list(MK_LINK_LIBRARIES PkgConfig::AVCODEC)
      message(STATUS "found library: ${AVCODEC_LIBRARIES}")
    endif()
  endif()

  # 查找 ffmpeg/libswscale 是否安装
  if(PKG_CONFIG_FOUND)
    pkg_check_modules(SWSCALE QUIET IMPORTED_TARGET libswscale)
    if(SWSCALE_FOUND)
      update_cached_list(MK_LINK_LIBRARIES PkgConfig::SWSCALE)
      message(STATUS "found library: ${SWSCALE_LIBRARIES}")
    endif()
  endif()

  # 查找 ffmpeg/libswresample 是否安装
  if(PKG_CONFIG_FOUND)
    pkg_check_modules(SWRESAMPLE QUIET IMPORTED_TARGET libswresample)
    if(SWRESAMPLE_FOUND)
      update_cached_list(MK_LINK_LIBRARIES PkgConfig::SWRESAMPLE)
      message(STATUS "found library: ${SWRESAMPLE_LIBRARIES}")
    endif()
  endif()

  # 查找 ffmpeg/libutil 是否安装
  if(NOT AVUTIL_FOUND)
    find_package(AVUTIL QUIET)
    if(AVUTIL_FOUND)
      include_directories(SYSTEM ${AVUTIL_INCLUDE_DIR})
      update_cached_list(MK_LINK_LIBRARIES ${AVUTIL_LIBRARIES})
      message(STATUS "found library: ${AVUTIL_LIBRARIES}")
    endif ()
  endif ()

  # 查找 ffmpeg/libavcodec 是否安装
  if(NOT AVCODEC_FOUND)
    find_package(AVCODEC QUIET)
    if(AVCODEC_FOUND)
      include_directories(SYSTEM ${AVCODEC_INCLUDE_DIR})
      update_cached_list(MK_LINK_LIBRARIES ${AVCODEC_LIBRARIES})
      message(STATUS "found library: ${AVCODEC_LIBRARIES}")
    endif()
  endif()

  # 查找 ffmpeg/libswscale 是否安装
  if(NOT SWSCALE_FOUND)
    find_package(SWSCALE QUIET)
    if(SWSCALE_FOUND)
      include_directories(SYSTEM ${SWSCALE_INCLUDE_DIR})
      update_cached_list(MK_LINK_LIBRARIES ${SWSCALE_LIBRARIES})
      message(STATUS "found library: ${SWSCALE_LIBRARIES}")
    endif()
  endif()

  # 查找 ffmpeg/libswresample 是否安装
  if(NOT SWRESAMPLE_FOUND)
    find_package(SWRESAMPLE QUIET)
    if(SWRESAMPLE_FOUND)
      include_directories(SYSTEM ${SWRESAMPLE_INCLUDE_DIRS})
      update_cached_list(MK_LINK_LIBRARIES ${SWRESAMPLE_LIBRARIES})
      message(STATUS "found library: ${SWRESAMPLE_LIBRARIES}")
    endif()
  endif()

  if(AVUTIL_FOUND AND AVCODEC_FOUND AND SWSCALE_FOUND AND SWRESAMPLE_FOUND)
    update_cached_list(MK_COMPILE_DEFINITIONS ENABLE_FFMPEG)
    update_cached_list(MK_LINK_LIBRARIES ${CMAKE_DL_LIBS})
  else()
    set(ENABLE_FFMPEG OFF)
    message(WARNING "ffmpeg 相关功能未找到")
  endif()
endif()

if(ENABLE_MEM_DEBUG)
  update_cached_list(MK_LINK_LIBRARIES
    "-Wl,-wrap,free;-Wl,-wrap,malloc;-Wl,-wrap,realloc;-Wl,-wrap,calloc")
  update_cached_list(MK_COMPILE_DEFINITIONS ENABLE_MEM_DEBUG)
  message(STATUS "已启用内存调试功能")
endif()

if(ENABLE_ASAN)
  list(APPEND COMPILE_OPTIONS_DEFAULT
    "-fsanitize=address;-fno-omit-frame-pointer")
  # https://github.com/google/sanitizers/wiki/AddressSanitizer#using-addresssanitizer
  # > In order to use AddressSanitizer you will need to
  # > compile and link your program using clang with the -fsanitize=address switch.
  update_cached_list(MK_LINK_LIBRARIES "-fsanitize=address")
  message(STATUS "已启用 Address Sanitize")
endif()

# TODO: 下载静态编译 jemalloc 后静态编译链接?
set(DEP_ROOT_DIR ${CMAKE_CURRENT_SOURCE_DIR}/3rdpart/external-${CMAKE_SYSTEM_NAME})
if(ENABLE_JEMALLOC_STATIC)
  if(NOT EXISTS ${DEP_ROOT_DIR})
    file(MAKE_DIRECTORY ${DEP_ROOT_DIR})
  endif()

  include(Jemalloc)
  include_directories(SYSTEM ${DEP_ROOT_DIR}/${JEMALLOC_NAME}/include/jemalloc)
  link_directories(${DEP_ROOT_DIR}/${JEMALLOC_NAME}/lib)
  # 用于影响后续查找过程
  set(JEMALLOC_ROOT_DIR "${DEP_ROOT_DIR}/${JEMALLOC_NAME}")
endif()

# 默认链接 jemalloc 库避免内存碎片
find_package(JEMALLOC QUIET)
if(JEMALLOC_FOUND)
  message(STATUS "found library: ${JEMALLOC_LIBRARIES}")
  include_directories(${JEMALLOC_INCLUDE_DIR})
  update_cached_list(MK_LINK_LIBRARIES ${JEMALLOC_LIBRARIES})
endif()

# 查找 openssl 是否安装
find_package(OpenSSL QUIET)
if(OPENSSL_FOUND AND ENABLE_OPENSSL)
  message(STATUS "found library: ${OPENSSL_LIBRARIES}, ENABLE_OPENSSL defined")
  include_directories(${OPENSSL_INCLUDE_DIR})
  update_cached_list(MK_COMPILE_DEFINITIONS ENABLE_OPENSSL)
  update_cached_list(MK_LINK_LIBRARIES ${OPENSSL_LIBRARIES})
  if(CMAKE_SYSTEM_NAME MATCHES "Linux" AND OPENSSL_USE_STATIC_LIBS)
    update_cached_list(MK_LINK_LIBRARIES ${CMAKE_DL_LIBS})
  endif()
else()
  set(ENABLE_OPENSSL OFF)
  set(ENABLE_WEBRTC OFF)
  message(WARNING "openssl 未找到, rtmp 将不支持 flash 播放器, https/wss/rtsps/rtmps/webrtc 也将失效")
endif()

# 查找 mysql 是否安装
find_package(MYSQL QUIET)
if(MYSQL_FOUND AND ENABLE_MYSQL)
  message(STATUS "found library: ${MYSQL_LIBRARIES}, ENABLE_MYSQL defined")
  include_directories(SYSTEM
    ${MYSQL_INCLUDE_DIR}
    ${MYSQL_INCLUDE_DIR}/mysql)

  update_cached_list(MK_COMPILE_DEFINITIONS ENABLE_MYSQL)
  update_cached_list(MK_LINK_LIBRARIES ${MYSQL_LIBRARIES})
endif()

# 查找 x264 是否安装
find_package(X264 QUIET)
if(X264_FOUND AND ENABLE_X264)
  message(STATUS "found library: ${X264_LIBRARIES}, ENABLE_X264 defined")
  include_directories(SYSTEM ${X264_INCLUDE_DIRS})

  update_cached_list(MK_COMPILE_DEFINITIONS ENABLE_X264)
  update_cached_list(MK_LINK_LIBRARIES ${X264_LIBRARIES})
endif()

# 查找 faac 是否安装
find_package(FAAC QUIET)
if(FAAC_FOUND AND ENABLE_FAAC)
  message(STATUS "found library:${FAAC_LIBRARIES}, ENABLE_FAAC defined")
  include_directories(SYSTEM ${FAAC_INCLUDE_DIR})
  update_cached_list(MK_COMPILE_DEFINITIONS ENABLE_FAAC)
  update_cached_list(MK_LINK_LIBRARIES ${FAAC_LIBRARIES})
endif()

if(WIN32)
  update_cached_list(MK_LINK_LIBRARIES WS2_32 Iphlpapi shlwapi)
elseif(NOT ANDROID OR IOS)
  update_cached_list(MK_LINK_LIBRARIES pthread)
endif()

# ----------------------------------------------------------------------------
# Solution folders:
# ----------------------------------------------------------------------------
if(USE_SOLUTION_FOLDERS)
  set_property(GLOBAL PROPERTY USE_FOLDERS ON)
  set_property(GLOBAL PROPERTY PREDEFINED_TARGETS_FOLDER "CMakeTargets")
endif()

if(MSVC AND ENABLE_MSVC_MT)
  set(CompilerFlags
    CMAKE_CXX_FLAGS
    CMAKE_CXX_FLAGS_DEBUG
    CMAKE_CXX_FLAGS_RELEASE
    CMAKE_C_FLAGS
    CMAKE_C_FLAGS_DEBUG
    CMAKE_C_FLAGS_RELEASE)
  # TODO: 通常应该不需要替换
  foreach(CompilerFlag ${CompilerFlags})
    string(REPLACE "/MD" "/MT" ${CompilerFlag} "${${CompilerFlag}}")
  endforeach()
endif()

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

# for version.h
include_directories(${CMAKE_CURRENT_BINARY_DIR})

# for assert.h
include_directories(${CMAKE_CURRENT_SOURCE_DIR}/3rdpart)

add_subdirectory(3rdpart)

add_subdirectory(src)

if(ENABLE_SRT)
  add_subdirectory(srt)
endif()

if(ENABLE_WEBRTC)
  add_subdirectory(webrtc)
endif()

if(ENABLE_API)
  add_subdirectory(api)
endif()

# IOS 不编译可执行程序
if(IOS)
  return()
endif()

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

if(ENABLE_PLAYER AND ENABLE_FFMPEG)
  add_subdirectory(player)
endif()

#MediaServer主程序
add_subdirectory(server)

# Android 会 add_subdirectory 并依赖该变量
if(ENABLE_SERVER_LIB)
  set(MK_LINK_LIBRARIES ${MK_LINK_LIBRARIES} PARENT_SCOPE)
endif()

#cpp测试demo程序
if (ENABLE_TESTS)
  add_subdirectory(tests)
endif ()

# 拷贝www文件夹、配置文件、默认证书
file(COPY "${CMAKE_CURRENT_SOURCE_DIR}/www" DESTINATION ${EXECUTABLE_OUTPUT_PATH})
file(COPY "${CMAKE_CURRENT_SOURCE_DIR}/conf/config.ini" DESTINATION ${EXECUTABLE_OUTPUT_PATH})
file(COPY "${CMAKE_CURRENT_SOURCE_DIR}/default.pem" DESTINATION ${EXECUTABLE_OUTPUT_PATH})