import gradio as gr

from transformers import AutoModelForSeq2SeqLM, AutoTokenizer

model_path = "anzorq/m2m100_418M_ft_ru-kbd_44K"  
src_lang="ru" 
tgt_lang="zu"

tokenizer = AutoTokenizer.from_pretrained(model_path, src_lang=src_lang)
model = AutoModelForSeq2SeqLM.from_pretrained(model_path)

def translate(text, num_beams=4, num_return_sequences=4):
  inputs = tokenizer(text, return_tensors="pt")

  translated_tokens = model.generate(
      **inputs, forced_bos_token_id=tokenizer.lang_code_to_id[tgt_lang], num_beams=num_beams, num_return_sequences=num_return_sequences
  )

  translations = []
  for translation in tokenizer.batch_decode(translated_tokens, skip_special_tokens=True):
      translations.append(translation)

  return  "\n".join(["• " + translation for translation in translations])

output = gr.outputs.Textbox()
with gr.Accordion("Advanced Options"):
  num_beams = gr.inputs.Slider(2, 10, step=1, label="Number of beams", default=4)
  num_return_sequences = gr.inputs.Slider(2, 10, step=1, label="Number of returned sequences", default=4)
iface = gr.Interface(fn=translate, inputs=["text", num_beams, num_return_sequences], outputs=output)
iface.launch()

# import gradio as gr

# title = "Русско-черкесский переводчик"
# description = "Demo of a Russian-Circassian (Kabardian dialect) translator. <br>It is based on Facebook's <a href=\"https://about.fb.com/news/2020/10/first-multilingual-machine-translation-model/\">M2M-100 model</a> machine learning model, and has been trained on 45,000 Russian-Circassian sentence pairs. <br>It can also translate from 100 other languages to Circassian (English, French, Spanish, etc.), but less accurately. <br>The data corpus is constantly being expanded, and we need help in finding sentence sources, OCR, data cleaning, etc. <br>If you are interested in helping out with this project, please contact me at the link below.<br><br>This is only a demo, not a finished product. Translation quality is still low and will improve with time and more data.<br>45,000 sentence pairs is not enough to create an accurate machine translation model, and more data is needed.<br>You can help by finding sentence sources (books, web pages, etc.), scanning books, OCRing documents, data cleaning, and other tasks.<br><br>If you are interested in helping out with this project, contact me at the link below."
# article = """<p style='text-align: center'><a href='https://arxiv.org/abs/1806.00187'>Scaling Neural Machine Translation</a> | <a href='https://github.com/pytorch/fairseq/'>Github Repo</a></p>"""

# examples = [
#     ["Мы идем домой"],
#     ["Сегодня хорошая погода"],
#     ["Дети играют во дворе"],
#     ["We live in a big house"],
#     ["Tu es une bonne personne."],
#     ["أين تعيش؟"],
#     ["Bir şeyler yapmak istiyorum."],
# ]

# gr.Interface.load("models/anzorq/m2m100_418M_ft_ru-kbd_44K", title=title, description=description, article=article, examples=examples).launch()