import gradio as gr

from transformers import LineByLineTextDataset
from transformers import DataCollatorForLanguageModeling
from transformers import GPT2Tokenizer, GPT2LMHeadModel
from transformers import Trainer, TrainingArguments

def load_model(model_path):
    model = GPT2LMHeadModel.from_pretrained(model_path)
    return model


def load_tokenizer(tokenizer_path):
    tokenizer = GPT2Tokenizer.from_pretrained(tokenizer_path)
    return tokenizer


def generate_text(sequence, max_new_tokens):
    ids = tokenizer.encode(f'{sequence}', return_tensors='pt')
    input_length = ids.size(1)
    max_length = input_length + max_new_tokens
    final_outputs = model.generate(
        ids,
        do_sample=True,
        max_length=max_length,
        pad_token_id=model.config.eos_token_id
    )
    return tokenizer.decode(final_outputs[0], skip_special_tokens=True)




model_path = r'./checkpoint/'
model = load_model(model_path)
tokenizer = load_tokenizer('./tokenizer/')


def generate_text(sequence, max_new_tokens):
    ids = tokenizer.encode(f'{sequence}', return_tensors='pt')
    input_length = ids.size(1)
    max_length = input_length + max_new_tokens
    final_outputs = model.generate(
        ids,
        do_sample=True,
        max_length=max_length,
        pad_token_id=model.config.eos_token_id
    )
    return tokenizer.decode(final_outputs[0], skip_special_tokens=True)

iface = gr.Interface(fn=generate_text, inputs="text", outputs="text")

iface.launch()