cmake_minimum_required(VERSION 2.8.3)

########## Private ##########
if(NOT DEFINED ARGON2_PUBLIC_VAR_NS)
    set(ARGON2_PUBLIC_VAR_NS "ARGON2")
endif(NOT DEFINED ARGON2_PUBLIC_VAR_NS)
if(NOT DEFINED ARGON2_PRIVATE_VAR_NS)
    set(ARGON2_PRIVATE_VAR_NS "_${ARGON2_PUBLIC_VAR_NS}")
endif(NOT DEFINED ARGON2_PRIVATE_VAR_NS)

function(argon2_debug _VARNAME)
    if(${ARGON2_PUBLIC_VAR_NS}_DEBUG)
        if(DEFINED ${ARGON2_PUBLIC_VAR_NS}_${_VARNAME})
            message("${ARGON2_PUBLIC_VAR_NS}_${_VARNAME} = ${${ARGON2_PUBLIC_VAR_NS}_${_VARNAME}}")
        else(DEFINED ${ARGON2_PUBLIC_VAR_NS}_${_VARNAME})
            message("${ARGON2_PUBLIC_VAR_NS}_${_VARNAME} = <UNDEFINED>")
        endif(DEFINED ${ARGON2_PUBLIC_VAR_NS}_${_VARNAME})
    endif(${ARGON2_PUBLIC_VAR_NS}_DEBUG)
endfunction(argon2_debug)

# Alias all Argon2_FIND_X variables to ARGON2_FIND_X
# Workaround for find_package: no way to force case of variable's names it creates (I don't want to change MY coding standard)
set(${ARGON2_PRIVATE_VAR_NS}_FIND_PKG_PREFIX "Argon2")
get_directory_property(${ARGON2_PRIVATE_VAR_NS}_CURRENT_VARIABLES VARIABLES)
foreach(${ARGON2_PRIVATE_VAR_NS}_VARNAME ${${ARGON2_PRIVATE_VAR_NS}_CURRENT_VARIABLES})
    if(${ARGON2_PRIVATE_VAR_NS}_VARNAME MATCHES "^${${ARGON2_PRIVATE_VAR_NS}_FIND_PKG_PREFIX}")
        string(REGEX REPLACE "^${${ARGON2_PRIVATE_VAR_NS}_FIND_PKG_PREFIX}" "${ARGON2_PUBLIC_VAR_NS}" ${ARGON2_PRIVATE_VAR_NS}_NORMALIZED_VARNAME ${${ARGON2_PRIVATE_VAR_NS}_VARNAME})
        set(${${ARGON2_PRIVATE_VAR_NS}_NORMALIZED_VARNAME} ${${${ARGON2_PRIVATE_VAR_NS}_VARNAME}})
    endif(${ARGON2_PRIVATE_VAR_NS}_VARNAME MATCHES "^${${ARGON2_PRIVATE_VAR_NS}_FIND_PKG_PREFIX}")
endforeach(${ARGON2_PRIVATE_VAR_NS}_VARNAME)

########## Public ##########
find_path(
    ${ARGON2_PUBLIC_VAR_NS}_INCLUDE_DIRS
    NAMES argon2.h
)

if(${ARGON2_PUBLIC_VAR_NS}_INCLUDE_DIRS)
    find_library(
        ${ARGON2_PUBLIC_VAR_NS}_LIBRARIES
        NAMES argon2
    )

    include(FindPackageHandleStandardArgs)
    if(${ARGON2_PUBLIC_VAR_NS}_FIND_REQUIRED AND NOT ${ARGON2_PUBLIC_VAR_NS}_FIND_QUIETLY)
        find_package_handle_standard_args(
            ${ARGON2_PUBLIC_VAR_NS}
            REQUIRED_VARS ${ARGON2_PUBLIC_VAR_NS}_LIBRARIES ${ARGON2_PUBLIC_VAR_NS}_INCLUDE_DIRS
        )
    else(${ARGON2_PUBLIC_VAR_NS}_FIND_REQUIRED AND NOT ${ARGON2_PUBLIC_VAR_NS}_FIND_QUIETLY)
        find_package_handle_standard_args(${ARGON2_PUBLIC_VAR_NS} "argon2 not found" ${ARGON2_PUBLIC_VAR_NS}_LIBRARIES ${ARGON2_PUBLIC_VAR_NS}_INCLUDE_DIRS)
    endif(${ARGON2_PUBLIC_VAR_NS}_FIND_REQUIRED AND NOT ${ARGON2_PUBLIC_VAR_NS}_FIND_QUIETLY)

else(${ARGON2_PUBLIC_VAR_NS}_INCLUDE_DIRS)

    if(${ARGON2_PUBLIC_VAR_NS}_FIND_REQUIRED AND NOT ${ARGON2_PUBLIC_VAR_NS}_FIND_QUIETLY)
        message(FATAL_ERROR "Could not find argon2 include directory")
    endif(${ARGON2_PUBLIC_VAR_NS}_FIND_REQUIRED AND NOT ${ARGON2_PUBLIC_VAR_NS}_FIND_QUIETLY)

endif(${ARGON2_PUBLIC_VAR_NS}_INCLUDE_DIRS)

mark_as_advanced(
    ${ARGON2_PUBLIC_VAR_NS}_INCLUDE_DIRS
    ${ARGON2_PUBLIC_VAR_NS}_LIBRARIES
)

# IN (args)
argon2_debug("FIND_REQUIRED")
argon2_debug("FIND_QUIETLY")
argon2_debug("FIND_VERSION")
# OUT
# Linking
argon2_debug("INCLUDE_DIRS")
argon2_debug("LIBRARIES")