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

# Load model and tokenizer
def load_model():
    model_name = "zeyadusf/text2pandas-T5"
    tokenizer = AutoTokenizer.from_pretrained(model_name)
    model = AutoModelForSeq2SeqLM.from_pretrained(model_name)
    device = torch.device("cuda" if torch.cuda.is_available() else "cpu")
    model = model.to(device)
    return model, tokenizer

model, tokenizer = load_model()

# Define the function to generate text
def generate_text(question, context, max_length=512, num_beams=4, early_stopping=True):
    input_text = f"<question> {question} <context> {context}"
    inputs = tokenizer.encode(input_text, return_tensors="pt", truncation=True, max_length=max_length).to(model.device)
    
    with torch.no_grad():
        outputs = model.generate(inputs, max_length=max_length, num_beams=num_beams, early_stopping=early_stopping)
    
    predicted_text = tokenizer.decode(outputs[0], skip_special_tokens=True)
    return predicted_text

# Gradio interface
def gradio_interface(question, context, max_length, num_beams, early_stopping):
    return generate_text(question, context, max_length, num_beams, early_stopping)

# Gradio UI Components
question_input = gr.inputs.Textbox(label="Enter the Question", default="what is the total amount of players for the rockets in 1998 only?")
context_input = gr.inputs.Textbox(label="Enter the Context", default="df = pd.DataFrame(columns=['player', 'years_for_rockets'])")
max_length_input = gr.inputs.Slider(minimum=50, maximum=1024, default=512, label="Max Length")
num_beams_input = gr.inputs.Slider(minimum=1, maximum=10, default=4, label="Number of Beams")
early_stopping_input = gr.inputs.Checkbox(default=True, label="Early Stopping")

# Custom CSS to style the slider, checkbox, and center the button
custom_css = """
/* Make the slider handle and bar light green */
input[type="range"] {
    accent-color: lightgreen;
}
input[type="range"]::-webkit-slider-thumb {
    background-color: #90EE90; /* Light green slider thumb */
}
input[type="range"]::-webkit-slider-runnable-track {
    background-color: #32CD32; /* Light green slider track */
}

/* Make the checkbox light green */
input[type="checkbox"] {
    accent-color: lightgreen;
}

/* Center the button */
.gr-button.gr-button-primary {
    display: block;
    margin: 0 auto;
    background-color: #90EE90; /* Light green button */
    color: black;
    border-radius: 8px;
    border: 2px solid #006400;  /* Dark green border */
}
"""

# Create Gradio Interface
gr.Interface(
    fn=gradio_interface,
    inputs=[question_input, context_input, max_length_input, num_beams_input, early_stopping_input],
    outputs="text",
    title="Text to Pandas Code Generator",
    description="Generate Pandas code by providing a question and a context.",
    css=custom_css,  # Apply the custom CSS
).launch()