#!/usr/bin/python3

from sys import argv
from os import listdir
from re import compile as regex_compile

include_dir_root_path = "hal_rootstrap_dir"

regex_assignment = regex_compile("\s*([-_a-zA-Z0-9]+)\s*=\s*([^\s]*)")
regex_declaration = regex_compile("\s*([-_a-zA-Z0-9]+)\s*:\s*(.+)\s*")
regex_substitution = regex_compile("\${([-_a-zA-Z0-9]+)}")

libs = { "-L${" + include_dir_root_path + "}" }
cflags = { "-I${" + include_dir_root_path + "}" }
cxxflags = { "-I${" + include_dir_root_path + "}" }

def parse_pc(fname):
	variables = dict()

	f = open(fname, "r")
	for line in f:
		if matches := regex_assignment.findall(line):
			symbol, value = matches[0][0], matches[0][1]
			matched_symbols = regex_substitution.findall(value)
			for matched_symbol in matched_symbols:
				value = value.replace("${{{}}}".format(matched_symbol), "{}".format(variables[matched_symbol]))
			variables[symbol] = value
			continue
		if matches := regex_declaration.findall(line):
			symbol, value = matches[0][0], matches[0][1]
			matched_symbols = regex_substitution.findall(value)
			for matched_symbol in matched_symbols:
				value = value.replace("${{{}}}".format(matched_symbol), "{}".format(variables[matched_symbol]))
			if symbol == "Libs":
				libs.update(set(map(lambda value: value[:2] + "${" + include_dir_root_path + "}" + value[2:] if value[2] == '/' else value, value.split())))
				continue
			if symbol == "Cflags":
				cflags.update((map(lambda value: value[:2] + "${" + include_dir_root_path + "}" + value[2:] if value[2] == '/' else value, value.split())))
				continue
			if symbol == "CXXflags":
				cxxflags.update(list(map(lambda value: value[:2] + "${" + include_dir_root_path + "}" + value[2:] if value[2] == '/' else value, value.split())))
				continue

	f.close()

def write_to_pc(fname):
	f = open(fname, "a")
	f.write("\n")
	f.write("Libs: {}\n".format(' '.join(libs)))
	f.write("Cflags: {}\n".format(' '.join(cflags)))
	f.write("CXXflags: {}\n".format(' '.join(cxxflags)))
	f.close()

hal_rootstrap_pc_path = argv[1]
pc_dir = argv[2]
pc_files = listdir(pc_dir)

for pc_file in pc_files:
	parse_pc("{}/{}".format(pc_dir, pc_file))

write_to_pc(hal_rootstrap_pc_path)