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# -*- coding: utf-8 -*-
"""app.ipynb

Automatically generated by Colab.

Original file is located at
    https://colab.research.google.com/drive/1VgZCCaMxdd-9oiW3-Kme4eOwUvtDo_wr
"""

import gradio as gr
from transformers import AutoTokenizer, AutoModelForSeq2SeqLM
import torch

MODEL_ID = "Yenes/flan-t5-python-explainer"

tokenizer = AutoTokenizer.from_pretrained(MODEL_ID)
model = AutoModelForSeq2SeqLM.from_pretrained(
    MODEL_ID,
    torch_dtype=torch.float16 if torch.cuda.is_available() else torch.float32,
    device_map="auto",
)

MAX_INPUT_LENGTH = 256

def explain_code(code: str, max_new_tokens: int = 128):
    """Python kodunu Türkçe ve satır satır açıklayan fonksiyon."""
    if not code.strip():
        return "Lütfen açıklanacak bir Python kodu girin."

    instruction = (
        "Türkçe ve anlaşılır bir şekilde, aşağıdaki Python kodunu satır satır açıkla:\n"
        f"{code}"
    )

    inputs = tokenizer(
        instruction,
        return_tensors="pt",
        truncation=True,
        max_length=MAX_INPUT_LENGTH,
    ).to(model.device)

    with torch.no_grad():
        outputs = model.generate(
            **inputs,
            max_new_tokens=max_new_tokens,
            num_beams=4,
            early_stopping=True,
        )

    explanation = tokenizer.decode(outputs[0], skip_special_tokens=True).strip()
    return explanation

demo = gr.Interface(
    fn=explain_code,
    inputs=[
        gr.Textbox(lines=10, label="Python Kodu"),
        gr.Slider(32, 512, value=128, step=16, label="Maksimum yeni token sayısı"),
    ],
    outputs=gr.Textbox(lines=14, label="Türkçe Açıklama"),
    title="Python Kod Açıklayıcı (FLAN-T5)",
    description="FLAN-T5 tabanlı, Türkçe Python kod açıklama modeli.",
)

if __name__ == "__main__":
    demo.launch()