AC_PREREQ([2.71])
AC_INIT([engine], [alpha])
AC_CONFIG_SRCDIR([src/engine.cpp])
AC_CONFIG_HEADERS([src/config.h])
AC_CONFIG_AUX_DIR([build-aux])
AC_CONFIG_MACRO_DIR([m4])
AM_INIT_AUTOMAKE([foreign subdir-objects])
AC_CONFIG_FILES([Makefile])

DEPS_CPPFLAGS=""
DEPS_LIBS=""

PKG_CHECK_MODULES([GLFW3], [glfw3 >= 3.3.10])
DEPS_CPPFLAGS="$GLFW3_CFLAGS $DEPS_CPPFLAGS"
DEPS_LIBS="$GLFW3_LIBS $DEPS_LIBS"

PKG_CHECK_MODULES([VULKAN], [vulkan >= 1.3.275])
DEPS_CPPFLAGS="$VULKAN_CFLAGS $DEPS_CPPFLAGS"
# Not sure why they are needed
DEPS_LIBS="-ldl -lpthread -lX11 -lXxf86vm -lXrandr -lXi $DEPS_LIBS"
DEPS_LIBS="$VULKAN_LIBS $DEPS_LIBS"

// TODO: add check for Vulkan Utility Library

PKG_CHECK_MODULES([NCURSES], [ncurses >= 6.4.20230625], [
    DEPS_CPPFLAGS="$NCURSES_CFLAGS $DEPS_CPPFLAGS"
    DEPS_LIBS="$NCURSES_LIBS $DEPS_LIBS"
    AC_DEFINE([ENABLE_NCURSES], [], [Enable ncurses])
], :)

AC_SUBST(DEPS_CPPFLAGS)
AC_SUBST(DEPS_LIBS)

TESTS_DEPS_CPPFLAGS=""
TESTS_DEPS_LIBS=""

PKG_CHECK_MODULES([CRITERION], [criterion >= 2.4.1], [
    enable_tests=yes
    TESTS_DEPS_CPPFLAGS="$CRITERION_CFLAGS $TESTS_DEPS_CPPFLAGS"
    TESTS_DEPS_LIBS="$CRITERION_LIBS $TESTS_DEPS_LIBS"
    AC_CONFIG_FILES([tests/Makefile])
], [enable_tests=no])
AM_CONDITIONAL([ENABLE_TESTS], [test x$enable_tests = xyes])

AC_ARG_ENABLE(debug, AS_HELP_STRING([--enable-debug], [enable debugging, default: no]),
    [case "${enableval}" in
        yes) debug=true  ;;
        no)  debug=false ;;
        *)   AC_MSG_ERROR([bad value ${enableval} for --enable-debug]) ;;
    esac],
    [debug=false])
AM_CONDITIONAL([DEBUG], test x"$debug" = x"true")

AC_SUBST(TESTS_DEPS_CPPFLAGS)
AC_SUBST(TESTS_DEPS_LIBS)

AC_PROG_CXX
AC_TYPE_UINT32_T
AC_CHECK_FUNCS([floor setlocale])

AC_REQUIRE_AUX_FILE([tap-driver.sh])
AC_OUTPUT