#!/bin/bash

folders=("engine/src" "lib/raylib/include" "lib/tiny/inc" "lib/luajit/inc")
names=("enginend" "raylib" "tiny" "luajit")
outdir="include"
types=("h" "hpp")

mkdir -p "$outdir"


create_symlinks() {
	local src="$1"
	local outnam="$2"
	local currout="$outdir/$outnam"
	
	mkdir -p "$currout"
	
	find "$src" -mindepth 1 -print0 | while IFS= read -r -d '' item; do
		rl="${item#$src/}"
		outpath="$currout/$rl"
		mkdir -p "$(dirname "$outpath")"
		
		if [ -f "$item" ]; then
			nam=$(basename "$item")
			ftype="${nam##*.}"
			
			skip=true
			for type in "${types[@]}"; do
				if [ "$ftype" = "$type" ]; then
					skip=false
					break
				fi
			done
			
			if [ "$skip" = false ]; then
				ln -sf "$(realpath --relative-to="$(dirname "$outpath")" "$item")" "$outpath"
			fi
		elif [ -d "$item" ]; then
			mkdir -p "$outpath"
		fi
	done
}

for i in "${!folders[@]}"; do
	if [ $i -lt ${#names[@]} ]; then
		src="${folders[$i]}"
		outnam="${names[$i]}"
		
		if [ -d "$src" ]; then
			create_symlinks "$src" "$outnam"
			echo
		else
			echo "'$src' not exist"
		fi
	fi
done