import argparse
from typing import List, Tuple
import pathlib

import os


def rtl_manifest_main():
    parser = argparse.ArgumentParser(
                    prog='rtl-manifest',
                    description='Read in sources.list files and return a string of all source files',
                    epilog='Made by Byron Lathi')

    parser.add_argument("source")

    args = parser.parse_args()
    files = read_sources(args.source)

    for file in files:
        print(file, end = " ")

    pass

def read_sources(source_file: str) -> List[str]:
    sources, incdirs = parse(source_file)

    return sources

def read_incdirs(source_file: str) -> List[str]:
    sources, incdirs = parse(source_file)

    return incdirs

def parse(source_file: str) -> Tuple[List[str], List[str]]:
    files = []
    incdirs = []

    def _recursive_parse(source_file: str):
        base_dir = pathlib.Path(source_file).parent
        with open(source_file, "r") as file:
            for line in file:
                path = os.path.expandvars(line.strip())
                if path.startswith("#"):
                    continue
                if path == "":
                    continue
                if path.startswith("`include "):
                    abs_path = pathlib.Path(base_dir / path.split()[1]).absolute()
                    incdirs.append(str(abs_path))
                    continue
                if (path.endswith("sources.list")):
                    new_path = pathlib.Path(base_dir) / path
                    _recursive_parse(new_path)
                else:
                    abs_path = pathlib.Path(base_dir / path).absolute()
                    files.append(str(abs_path))

    _recursive_parse(source_file)

    return files, incdirs