app.py

import gradio as gr
import math

# Store calculation history
history = []

# Calculator function
def scientific_calculator(x, y, operation, mode, clear=False):
    global history

    if clear:
        history = []
        return "", []

    try:
        result = None
        deg_to_rad = lambda a: math.radians(a) if mode == "Degrees" else a

        if operation == "Addition":
            result = x + y
        elif operation == "Subtraction":
            result = x - y
        elif operation == "Multiplication":
            result = x * y
        elif operation == "Division":
            result = x / y if y != 0 else "❌ Cannot divide by zero"
        elif operation == "Power (xʸ)":
            result = math.pow(x, y)
        elif operation == "Square Root (√x)":
            result = math.sqrt(x) if x >= 0 else "❌ Invalid input"
        elif operation == "Log₁₀(x)":
            result = math.log10(x) if x > 0 else "❌ Invalid input"
        elif operation == "Natural Log ln(x)":
            result = math.log(x) if x > 0 else "❌ Invalid input"
        elif operation == "Sin(x)":
            result = math.sin(deg_to_rad(x))
        elif operation == "Cos(x)":
            result = math.cos(deg_to_rad(x))
        elif operation == "Tan(x)":
            result = math.tan(deg_to_rad(x))
        elif operation == "Factorial (x!)":
            result = math.factorial(int(x)) if x >= 0 and float(x).is_integer() else "❌ Invalid input"
        elif operation == "π (Pi)":
            result = math.pi
        elif operation == "e (Euler's Number)":
            result = math.e

        if isinstance(result, float):
            result = round(result, 8)

        # Track history
        label = f"{operation}: {x}" + (f", {y}" if operation in ["Addition", "Subtraction", "Multiplication", "Division", "Power (xʸ)"] else "")
        history.append(f"{label} = {result}")
        return result, history[-6:]

    except Exception as e:
        return f"Error: {str(e)}", history[-6:]

# Build UI
with gr.Blocks(theme=gr.themes.Soft()) as demo:
    gr.Markdown("## 🧠 Scientific Calculator")

    with gr.Row():
        x = gr.Number(label="Input X", value=0)
        y = gr.Number(label="Input Y (optional)", value=0)

    operation = gr.Dropdown(
        label="Select Operation",
        choices=[
            "Addition", "Subtraction", "Multiplication", "Division",
            "Power (xʸ)", "Square Root (√x)", "Log₁₀(x)", "Natural Log ln(x)",
            "Sin(x)", "Cos(x)", "Tan(x)",
            "Factorial (x!)", "π (Pi)", "e (Euler's Number)"
        ],
        value="Addition"
    )

    mode = gr.Radio(choices=["Degrees", "Radians"], value="Degrees", label="Angle Mode (for Trig)")

    with gr.Row():
        calc_btn = gr.Button("🧮 Calculate")
        clear_btn = gr.Button("🧹 Clear History")

    result = gr.Textbox(label="Result", interactive=False)
    history_box = gr.List(label="History (last 6)")

    # Bind buttons
    calc_btn.click(
        fn=scientific_calculator,
        inputs=[x, y, operation, mode],
        outputs=[result, history_box]
    )

    clear_btn.click(
        fn=lambda: scientific_calculator(0, 0, "Addition", "Degrees", clear=True),
        inputs=[],
        outputs=[result, history_box]
    )

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