#!/usr/bin/env python3
# echo hurl file
# The file is parsed and output exactly as the input
#
import sys
import subprocess
import codecs

def decode_string(encoded):
    if encoded.startswith(codecs.BOM_UTF8):
        return encoded.decode('utf-8-sig')
    elif encoded.startswith(codecs.BOM_UTF16):
        encoded = encoded[len(codecs.BOM_UTF16):]
        return encoded.decode('utf-16')
    else:
        return encoded.decode()


def test(hurl_file):
    cmd = ['hurlfmt', '--no-format', hurl_file]
    print(' '.join(cmd))
    result = subprocess.run(cmd, stdout=subprocess.PIPE)
    expected = codecs.open(hurl_file, encoding='utf-8-sig').read()  # Input file can be saved with a BOM
    actual = decode_string(result.stdout)
    if actual != expected:
        print('>>> error in stdout')
        print(f'actual: <{actual}>\nexpected: <{expected}>')
        sys.exit(1)
        


def main():
    for hurl_file in sys.argv[1:]:
        test(hurl_file)


if __name__ == '__main__':
    main()