get_filename_component(CURRENT_SOURCE_PARENT_DIR
  ${CMAKE_CURRENT_SOURCE_DIR} DIRECTORY)
get_filename_component(CURRENT_BINARY_PARENT_DIR
  ${CMAKE_CURRENT_BINARY_DIR} DIRECTORY)

include_directories(${CMAKE_CURRENT_SOURCE_DIR})
include_directories(${CMAKE_CURRENT_BINARY_DIR})

include_directories(${CURRENT_SOURCE_PARENT_DIR})
include_directories(${CURRENT_BINARY_PARENT_DIR})

include_directories(${CMAKE_SOURCE_DIR}/include)
include_directories(${CMAKE_BINARY_DIR}/include)

protobuf_generate_c(SHIM_UDP_PROTO_SRCS SHIM_UDP_PROTO_HDRS
  shim_udp_messages.proto)

configure_file(
  "${CMAKE_CURRENT_SOURCE_DIR}/shim_udp_config.h.in"
  "${CMAKE_CURRENT_BINARY_DIR}/shim_udp_config.h")

set(IPCP_SHIM_UDP_TARGET ipcpd-shim-udp CACHE STRING "IPCP_SHIM_UDP_TARGET")

set(SHIM_UDP_SOURCES
  # Add source files here
  ${CMAKE_CURRENT_SOURCE_DIR}/main.c)

add_executable(ipcpd-shim-udp ${SHIM_UDP_SOURCES} ${IPCP_SOURCES}
  ${SHIM_UDP_PROTO_SRCS} "${CMAKE_CURRENT_BINARY_DIR}/shim_udp_config.h")
target_link_libraries(ipcpd-shim-udp LINK_PUBLIC ouroboros
  ${PROTOBUF_C_LIBRARY})

# Find the nsupdate executable
find_program(NSUPDATE_EXECUTABLE
  NAMES nsupdate
  DOC "The nsupdate tool that enables DDNS")

# Find the nslookup executable
find_program(NSLOOKUP_EXECUTABLE
  NAMES nslookup
  DOC "The nslookup tool that resolves DNS names")

include(AddCompileFlags)
if (${NSUPDATE_EXECUTABLE} STREQUAL "NSUPDATE_EXECUTABLE-NOTFOUND")
  message("-- Could not find nsupdate. Disabling DDNS functionality.")
elseif (${NSLOOKUP_EXECUTABLE} STREQUAL "NSLOOKUP_EXECUTABLE-NOTFOUND")
  message("-- Could not find nslookup. Disabling DNS lookups.")
else ()
  message("-- Found nsupdate: ${NSUPDATE_EXECUTABLE}")
  message("-- Found nslookup: ${NSLOOKUP_EXECUTABLE}")
  add_compile_flags(ipcpd-shim-udp -DCONFIG_OUROBOROS_ENABLE_DNS)
endif ()

if (CMAKE_BUILD_TYPE MATCHES Debug)
  add_compile_flags(ipcpd-shim-udp -DCONFIG_OUROBOROS_DEBUG)
endif (CMAKE_BUILD_TYPE MATCHES Debug)

install(TARGETS ipcpd-shim-udp RUNTIME DESTINATION sbin)

# Enable once ipcp-shim-udp has tests
# add_subdirectory(tests)
