import boto3, json, urllib.request

def translate_text(text, source_language_code = "ru", target_language_code = "en"):
    translate = boto3.client('translate')
    result = translate.translate_text(
        Text=text,
        SourceLanguageCode=source_language_code,
        TargetLanguageCode=target_language_code
    )
    return result['TranslatedText']

if __name__ == "__main__":
    try:
        import sys
        if len(sys.argv) < 2:
            raise RuntimeError("please enter Russian text")
        src = sys.argv[1]
        tgt = translate_text(src)
        request_body = json.dumps({
            "src": src,
            "tgt": tgt,
        })
        req = urllib.request.Request("http://localhost:8080/invocations",
                                     data=request_body.encode("utf-8"),
                                     headers={"Content-Type": "application/json",
                                              "Accept": "application/json"},
                                     method='POST')

        pairs = json.loads(urllib.request.urlopen(req).read())
        def format_text(text, n = 48):
            return text[:n] if len(text) > n else text+" ".join(["" for i in range(n-len(text))])
        for text, translation in pairs:
            print (f"{format_text(text)}\t{format_text(translation)}")   
    except RuntimeError as error:
        print ("Error: %s" % str(error))