import gradio as gr

def calculator(num1, operation, num2):
    if operation == "add":
        return num1 + num2
    elif operation == "subtract":
        return num1 - num2
    elif operation == "multiply":
        return num1 * num2
    elif operation == "divide":
        if num2 == 0:
            raise gr.Error("Cannot divide by zero!")
        return num1 / num2

with gr.Blocks(fill_height=True) as demo:
    gr.Markdown(
        """
        # 🧮 Calculator
        ### Simple & elegant calculator built with [anycoder](https://huggingface.co/spaces/akhaliq/anycoder)
        """,
        elem_classes="header"
    )
    
    with gr.Row():
        with gr.Column(scale=1, min_width=300):
            num1 = gr.Number(
                label="First Number",
                placeholder="0",
                value=0
            )
            
            operation = gr.Radio(
                choices=[
                    ("➕ Add", "add"),
                    ("➖ Subtract", "subtract"),
                    ("✖️ Multiply", "multiply"),
                    ("➗ Divide", "divide")
                ],
                value="add",
                label="Operation",
                container=True
            )
            
            num2 = gr.Number(
                label="Second Number",
                placeholder="0",
                value=0
            )
            
            with gr.Row():
                clear_btn = gr.Button("Clear", variant="secondary", size="lg", scale=1)
                calc_btn = gr.Button("Calculate", variant="primary", size="lg", scale=2)
            
            result = gr.Number(
                label="Result",
                interactive=False,
                container=True,
                scale=1
            )
    
    gr.Examples(
        examples=[
            [45, "add", 3],
            [10, "subtract", 5],
            [12, "multiply", 8],
            [100, "divide", 4],
        ],
        inputs=[num1, operation, num2],
        label="Try these examples",
        examples_per_page=4
    )
    
    def clear_all():
        return 0, "add", 0, 0
    
    calc_btn.click(
        fn=calculator,
        inputs=[num1, operation, num2],
        outputs=[result],
        api_visibility="public"
    )
    
    clear_btn.click(
        fn=clear_all,
        inputs=None,
        outputs=[num1, operation, num2, result]
    )
    
    # Allow Enter key to calculate
    num1.submit(calculator, [num1, operation, num2], [result])
    num2.submit(calculator, [num1, operation, num2], [result])

if __name__ == "__main__":
    demo.launch(
        theme=gr.themes.Soft(
            primary_hue="blue",
            secondary_hue="slate",
            neutral_hue="zinc",
            font=gr.themes.GoogleFont("Inter"),
            text_size="lg",
            spacing_size="lg",
            radius_size="lg"
        ).set(
            button_primary_background_fill="*primary_600",
            button_primary_background_fill_hover="*primary_700",
            block_title_text_weight="600",
            block_label_text_weight="500",
        ),
        css="""
        .header {
            text-align: center;
            padding: 1rem 0 2rem 0;
        }
        .header h1 {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }
        .header h3 {
            font-size: 1rem;
            font-weight: 400;
            color: #64748b;
        }
        @media (max-width: 768px) {
            .header h1 {
                font-size: 2rem;
            }
            .header h3 {
                font-size: 0.9rem;
            }
        }
        """,
        footer_links=[
            {"label": "Built with anycoder", "url": "https://huggingface.co/spaces/akhaliq/anycoder"}
        ]
    )