app.py

TITLE = """<h1 align="center">Gemini Playground ✨</h1>"""
SUBTITLE = """<h2 align="center">Play with Gemini Pro and Gemini Pro Vision</h2>"""

import os
import time
import uuid
from typing import List, Tuple, Optional, Union

import google.generativeai as genai
import gradio as gr
from PIL import Image
from dotenv import load_dotenv

# Cargar las variables de entorno desde el archivo .env
load_dotenv()

print("google-generativeai:", genai.__version__)

# Obtener la clave de la API de las variables de entorno
GOOGLE_API_KEY = os.getenv("GOOGLE_API_KEY")

# Verificar que la clave de la API esté configurada
if not GOOGLE_API_KEY:
    raise ValueError("GOOGLE_API_KEY is not set in environment variables.")

IMAGE_CACHE_DIRECTORY = "/tmp"
IMAGE_WIDTH = 512
CHAT_HISTORY = List[Tuple[Optional[Union[Tuple[str], str]], Optional[str]]]

def preprocess_image(image: Image.Image) -> Optional[Image.Image]:
    """Redimensiona la imagen para que se ajuste a la aplicación."""
    if image:
        image_height = int(image.height * IMAGE_WIDTH / image.width)
        return image.resize((IMAGE_WIDTH, image_height))

def cache_pil_image(image: Image.Image) -> str:
    """Guarda la imagen procesada en el sistema de archivos temporal."""
    image_filename = f"{uuid.uuid4()}.jpeg"
    os.makedirs(IMAGE_CACHE_DIRECTORY, exist_ok=True)
    image_path = os.path.join(IMAGE_CACHE_DIRECTORY, image_filename)
    image.save(image_path, "JPEG")
    return image_path

def upload(files: Optional[List[str]], chatbot: CHAT_HISTORY) -> CHAT_HISTORY:
    """Sube los archivos y los agrega al historial de chat."""
    for file in files:
        if file.name.endswith(('.jpg', '.jpeg', '.png')):
            image = Image.open(file).convert('RGB')
            image_preview = preprocess_image(image)
            if image_preview:
                # Muestra una vista previa de la imagen subida
                gr.Image(image_preview).render()
            image_path = cache_pil_image(image)
            chatbot.append(((image_path,), None))
        else:
            # Si es un PDF u otro tipo de archivo, solo se guarda la ruta
            chatbot.append(((file.name,), None))
    return chatbot

def user(text_prompt: str, chatbot: CHAT_HISTORY):
    """Procesa la entrada del usuario y la agrega al historial."""
    if text_prompt:
        chatbot.append((text_prompt, None))
    return "", chatbot

def bot(
    files: Optional[List[str]],
    model_choice: str,
    chatbot: CHAT_HISTORY
):
    """Genera una respuesta utilizando la API de Gemini."""
    if not GOOGLE_API_KEY:
        raise ValueError("GOOGLE_API_KEY is not set.")
    
    # Configurar la API con la clave
    genai.configure(api_key=GOOGLE_API_KEY)
    generation_config = genai.types.GenerationConfig(
        temperature=0.7,
        max_output_tokens=8192,
        top_k=10,
        top_p=0.9
    )

    # Procesar los archivos
    text_prompt = [chatbot[-1][0]] if chatbot and chatbot[-1][0] and isinstance(chatbot[-1][0], str) else []
    image_prompt = [preprocess_image(Image.open(file).convert('RGB')) for file in files if file.name.endswith(('.jpg', '.jpeg', '.png'))] if files else []
    pdf_prompt = [file.name for file in files if file.name.endswith('.pdf')] if files else []
    
    # Crear el modelo
    model = genai.GenerativeModel(model_choice)
    response = model.generate_content(text_prompt + image_prompt + pdf_prompt, stream=True, generation_config=generation_config)

    chatbot[-1][1] = ""
    for chunk in response:
        for i in range(0, len(chunk.text), 10):
            section = chunk.text[i:i + 10]
            chatbot[-1][1] += section
            time.sleep(0.01)
            yield chatbot

# Componentes de la interfaz de usuario con Gradio
chatbot_component = gr.Chatbot(
    label='Gemini',
    bubble_full_width=False,
    scale=2,
    height=300
)
text_prompt_component = gr.Textbox(
    placeholder="Message...", show_label=False, autofocus=True, scale=8
)
upload_button_component = gr.UploadButton(
    label="Upload Files", file_count="multiple", file_types=["image", "pdf"], scale=1
)
run_button_component = gr.Button(value="Run", variant="primary", scale=1)
model_choice_component = gr.Dropdown(
    choices=["gemini-1.5-flash", "gemini-2.0-flash-exp", "gemini-1.5-pro"],
    value="gemini-1.5-flash",
    label="Select Model",
    scale=2
)

user_inputs = [
    text_prompt_component,
    chatbot_component
]

bot_inputs = [
    upload_button_component,
    model_choice_component,
    chatbot_component
]

with gr.Blocks() as demo:
    gr.HTML("<h1 align='center'>Gemini Playground ✨</h1>")
    gr.HTML("<h2 align='center'>Play with Gemini Pro and Gemini Pro Vision</h2>")
    with gr.Column():
        chatbot_component.render()
        with gr.Row():
            text_prompt_component.render()
            upload_button_component.render()
            run_button_component.render()
        model_choice_component.render()

    run_button_component.click(
        fn=user,
        inputs=user_inputs,
        outputs=[text_prompt_component, chatbot_component],
        queue=False
    ).then(
        fn=bot, inputs=bot_inputs, outputs=[chatbot_component],
    )

    text_prompt_component.submit(
        fn=user,
        inputs=user_inputs,
        outputs=[text_prompt_component, chatbot_component],
        queue=False
    ).then(
        fn=bot, inputs=bot_inputs, outputs=[chatbot_component],
    )

    upload_button_component.upload(
        fn=upload,
        inputs=[upload_button_component, chatbot_component],
        outputs=[chatbot_component],
        queue=False
    )

demo.queue(max_size=99).launch(debug=False, show_error=True)