#!/usr/bin/env python3

import sys
import argparse
import kconfiglib

def node_to_str(node):
    if(node.item.type == kconfiglib.STRING):
        return "std::string(\"" + node.item.str_value + "\")"
    elif(node.item.type == kconfiglib.INT):
        return "int(" + node.item.str_value + ")"
    elif(node.item.type == kconfiglib.BOOL):
        tri_val_str = ("false", "unknown", "true")[node.item.tri_value]
        return "bool(" + tri_val_str + ")"

    return None

def writeItem(node, file):
    while node:
        if isinstance(node.item, kconfiglib.Symbol):
            name = node.item.name.lower().replace('_', '.')
            print("\t{ \"" + name + "\", " + node_to_str(node) + " },", file=file)

        if node.list:
            writeItem(node.list, file)

        node = node.next


if __name__ == "__main__":
    parser = argparse.ArgumentParser()
    parser.add_argument("--kconfig", nargs="?", default="Kconfig", help="Top-level Kconfig")
    parser.add_argument("--dotconfig", nargs="?", help=".config")
    parser.add_argument("--input", type=argparse.FileType('r'), help="settings.h.in")
    parser.add_argument("--output", type=argparse.FileType('w'), default=sys.stdout, help="Output location")
    args = parser.parse_args()

    kconf = kconfiglib.Kconfig(args.kconfig)
    if args.dotconfig is not None:
        kconf.load_config(args.dotconfig)

    print("/* Autogenerated file", file=args.output)
    print(" * kconfig: {}".format(args.kconfig), file=args.output)
    print(" * dotconfig: {}".format(args.dotconfig), file=args.output)
    print(" */", file=args.output)

    for line in args.input:
        if "@__DEFAULT_CFG__" in line:
            writeItem(kconf.top_node.list, file=args.output)
        else:
            print(line, end='', file=args.output)