#!/usr/bin/env sh

######################################################################
# @author      : swytch
# @file        : maker
# @license     : GPLv3
# @created     : Wednesday May 20, 2020 18:18:53 CEST
#
# @description : create a makefile for current project (if c/c++)
#                open it with (neo)vim
######################################################################


headers_list="$(ls | grep '\.hp*$')"
sources_list="$(ls | grep '\.cp*$')"
modules_list="$(printf "\n$sources_list" | sed 's/\.cp*//g' | tr '\n' ' ')"
targets_list="$(printf "\n$sources_list" | sed 's/\.cp*/\.o/g' | tr '\n' ' ')"

get_compiler(){
	for source_ in "$sources_list"; do
		case "$source_" in
			*.cpp) comp="g++";;
			*.c) comp="gcc";;
		esac
	done
}

is_c_project(){
	[ -n "$sources_list" ]
}

make_rule(){
	if [ "$comp" = "gcc" ]; then
		if [ "$1" = "main" ]; then
			printf "\n$1.o : $1.c" >> makefile
		else
			printf "\n$1.o : $1.c $1.h" >> makefile
		fi
		printf "\n\t\$(CC) -c $1.c \$(FLAGS)" >> makefile
	else
		if [ "$1" = "main" ]; then
			printf "\n$1.o : $1.cpp" >> makefile
		else
			printf "\n$1.o : $1.cpp $1.hpp" >> makefile
		fi
		printf "\n\t\$(CC) -c $1.cpp \$(FLAGS)" >> makefile
	fi
	printf "\n" >> makefile
}

if ! is_c_project; then
	printf "\nNo C/C++ project in directory. Exiting..."
	exit 1
fi

get_compiler

touch makefile

printf "BIN = main" > makefile
printf "\nTARGETS = $targets_list" >> makefile
printf "\n" >> makefile
printf "\nCC = $comp" >> makefile
printf "\nFLAGS = -Wall -g" >> makefile
printf "\n" >> makefile
printf "\nall : \$(BIN)" >> makefile
printf "\n" >> makefile
printf "\n\$(BIN) : \$(TARGETS)" >> makefile
printf "\n\t\$(CC) \$(TARGETS) -o \$(BIN) \$(FLAGS)" >> makefile
printf "\n" >> makefile

for module in $modules_list; do
	make_rule "$module"
done

printf "\nclean :" >> makefile
printf "\n\trm \$(BIN) *.o vgcore.*" >> makefile

sed -i 's/\s$//' makefile

if command -v nvim > /dev/null 2>&1; then
	nvim makefile
else
	vim makefile
fi