app.py

import gradio as gr
import spaces
import os
from mistralai import Mistral, UserMessage, SystemMessage

# Get the API key and endpoint
token = os.environ.get("GITHUB_TOKEN")
endpoint = "https://models.github.ai/inference"
model_name = "mistral-ai/Codestral-2501"

# Initialize the Mistral client
client = Mistral(api_key=token, server_url=endpoint)

def generate_response(query, diagram_type):
    if diagram_type == "ERD":
        system_prompt = (
            "You are a code generation expert. Convert the following PlantUML code into "
            "equivalent SQL code. Give only code as output."
        )
    elif diagram_type == "Use Case Diagram":
        system_prompt = (
            "You are a code generation expert. Convert the following PlantUML code into "
            "equivalent Java REST API controller methods."
        )
    elif diagram_type in ["Class Diagram", "Sequence Diagram"]:
        system_prompt = (
            "You are a code generation expert. Convert the following PlantUML code into "
            "equivalent Java code. Give only code as output."
        )
    else:
        system_prompt = "You are a helpful coding assistant."

    user_prompt = query.strip()

    response = client.chat.complete(
        model=model_name,
        messages=[
            SystemMessage(content=system_prompt),
            UserMessage(content=user_prompt),
        ],
        max_tokens=1000
    )

    return response.choices[0].message.content

# ---------------- Gradio Interface ----------------

def predict(query, diagram_type):
    return generate_response(query, diagram_type)

iface = gr.Interface(
    fn=predict,
    inputs=[
        gr.Textbox(lines=15, label="PlantUML Code"),
        gr.Dropdown(
            choices=["ERD", "Use Case Diagram", "Class Diagram", "Sequence Diagram"],
            label="Diagram Type"
        )
    ],
    outputs="text",
    title="PlantUML-To-Code Converter",
    description="Enter PlantUML code to generate equivalent SQL or Java code based on the diagram type."
)

iface.launch()