import gradio as gr
import numpy as np
import math

def calculate(expression):
    try:
        expression = expression.replace("^", "**")

        allowed_names = {
            "sin": np.sin,
            "cos": np.cos,
            "tan": np.tan,
            "log": np.log10,
            "ln": np.log,
            "sqrt": np.sqrt,
            "pi": np.pi,
            "e": np.e,
            "abs": abs,
            "factorial": math.factorial,
            "exp": np.exp
        }

        result = eval(expression, {"__builtins__": None}, allowed_names)
        return str(result)

    except Exception as e:
        return "Invalid expression"

with gr.Blocks() as demo:
    gr.Markdown("## 🔬 Scientific Calculator")

    input_box = gr.Textbox(label="Enter Expression")
    output_box = gr.Textbox(label="Result")

    gr.Button("Calculate").click(
        calculate,
        inputs=input_box,
        outputs=output_box
    )

demo.launch()