#!/usr/bin/env python3

import argparse
import difflib
import subprocess
import os
import sys

from isledecomp.utils import print_diff


def main():
    parser = argparse.ArgumentParser(
        allow_abbrev=False,
        description="Verify Exports: Compare the exports of two DLLs.",
    )
    parser.add_argument(
        "original", metavar="original-binary", help="The original binary"
    )
    parser.add_argument(
        "recompiled", metavar="recompiled-binary", help="The recompiled binary"
    )
    parser.add_argument(
        "--no-color", "-n", action="store_true", help="Do not color the output"
    )

    args = parser.parse_args()

    if not os.path.isfile(args.original):
        parser.error(f"Original binary file {args.original} does not exist")

    if not os.path.isfile(args.recompiled):
        parser.error(f"Recompiled binary {args.recompiled} does not exist")

    def get_file_in_script_dir(fn):
        return os.path.join(os.path.dirname(os.path.abspath(sys.argv[0])), fn)

    def get_exports(file):
        call = [get_file_in_script_dir("DUMPBIN.EXE"), "/EXPORTS"]

        if os.name != "nt":
            call.insert(0, "wine")
            file = (
                subprocess.check_output(["winepath", "-w", file])
                .decode("utf-8")
                .strip()
            )

        call.append(file)

        raw = subprocess.check_output(call).decode("utf-8").split("\r\n")
        exports = []

        start = False

        for line in raw:
            if not start:
                if line == "            ordinal hint   name":
                    start = True
            else:
                if line:
                    exports.append(line[27 : line.rindex("  (")])
                elif exports:
                    break

        return exports

    og_exp = get_exports(args.original)
    re_exp = get_exports(args.recompiled)

    udiff = difflib.unified_diff(og_exp, re_exp)
    has_diff = print_diff(udiff, args.no_color)

    return 1 if has_diff else 0


if __name__ == "__main__":
    raise SystemExit(main())