import gradio as gr

def calculate(num1, operation, num2):
    """Perform basic arithmetic operations."""
    try:
        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
    except Exception as e:
        raise gr.Error(f"Calculation error: {str(e)}")

# Modern, minimal CSS
custom_css = """
/* Global container */
.gradio-container {
    max-width: 420px !important;
    margin: 0 auto !important;
    padding: 1.5rem 1rem !important;
}

/* Header */
.calc-header {
    text-align: center;
    margin-bottom: 2rem !important;
}

.calc-title {
    font-size: 2rem !important;
    font-weight: 700 !important;
    margin-bottom: 0.5rem !important;
    color: #1e293b !important;
}

.calc-subtitle {
    font-size: 0.875rem !important;
    color: #64748b !important;
}

/* Calculator card */
.calc-card {
    background: #ffffff !important;
    border-radius: 20px !important;
    padding: 1.5rem !important;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06) !important;
}

/* Input styling */
.calc-input label {
    font-size: 0.875rem !important;
    font-weight: 600 !important;
    color: #475569 !important;
    margin-bottom: 0.5rem !important;
}

.calc-input input {
    font-size: 1.25rem !important;
    text-align: center !important;
    border-radius: 12px !important;
    border: 2px solid #e2e8f0 !important;
    transition: all 0.2s ease !important;
}

.calc-input input:focus {
    border-color: #6366f1 !important;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1) !important;
}

/* Operation buttons */
.operation-btns {
    display: grid !important;
    grid-template-columns: repeat(4, 1fr) !important;
    gap: 0.75rem !important;
    margin: 1.5rem 0 !important;
}

.operation-btns button {
    height: 60px !important;
    font-size: 1.5rem !important;
    border-radius: 12px !important;
    border: 2px solid #e2e8f0 !important;
    background: #ffffff !important;
    color: #475569 !important;
    font-weight: 600 !important;
    transition: all 0.2s ease !important;
    cursor: pointer !important;
}

.operation-btns button:hover {
    background: #f8fafc !important;
    border-color: #6366f1 !important;
    transform: translateY(-2px) !important;
}

.operation-btns button.selected {
    background: #6366f1 !important;
    color: white !important;
    border-color: #6366f1 !important;
}

/* Result display */
.result-box {
    background: linear-gradient(135deg, #667eea15 0%, #764ba215 100%) !important;
    border-radius: 16px !important;
    padding: 1.5rem !important;
    margin-top: 1.5rem !important;
    border: 2px solid #e0e7ff !important;
}

.result-box label {
    font-size: 0.875rem !important;
    font-weight: 600 !important;
    color: #4338ca !important;
    text-transform: uppercase !important;
    letter-spacing: 0.05em !important;
}

.result-box input {
    font-size: 2rem !important;
    font-weight: 700 !important;
    text-align: center !important;
    color: #4338ca !important;
    background: transparent !important;
    border: none !important;
}

/* Examples */
.examples-section {
    margin-top: 2rem !important;
    padding-top: 1.5rem !important;
    border-top: 1px solid #e2e8f0 !important;
}

.examples-title {
    font-size: 0.875rem !important;
    font-weight: 600 !important;
    color: #64748b !important;
    text-align: center !important;
    margin-bottom: 1rem !important;
}

/* Mobile optimization */
@media (max-width: 480px) {
    .gradio-container {
        padding: 1rem 0.75rem !important;
    }
    
    .calc-title {
        font-size: 1.75rem !important;
    }
    
    .calc-card {
        padding: 1.25rem !important;
    }
    
    .operation-btns button {
        height: 55px !important;
        font-size: 1.25rem !important;
    }
    
    .result-box input {
        font-size: 1.75rem !important;
    }
}

/* Footer link styling */
footer a {
    color: #6366f1 !important;
    font-weight: 600 !important;
}
"""

# Build the app with minimal components
with gr.Blocks() as demo:
    # Header
    with gr.Group(elem_classes="calc-header"):
        gr.Markdown("# 🧮 Calculator", elem_classes="calc-title")
        gr.Markdown(
            "Built with [anycoder](https://huggingface.co/spaces/akhaliq/anycoder)",
            elem_classes="calc-subtitle"
        )
    
    # Calculator card
    with gr.Group(elem_classes="calc-card"):
        # First number
        num1 = gr.Number(
            label="First Number",
            value=0,
            elem_classes="calc-input"
        )
        
        # Operation selector (simplified to radio)
        operation = gr.Radio(
            choices=[
                ("➕", "add"),
                ("➖", "subtract"),
                ("✖️", "multiply"),
                ("➗", "divide")
            ],
            value="add",
            label="Operation",
            elem_classes="operation-btns"
        )
        
        # Second number
        num2 = gr.Number(
            label="Second Number",
            value=0,
            elem_classes="calc-input"
        )
        
        # Result display
        result = gr.Number(
            label="Result",
            interactive=False,
            elem_classes="result-box"
        )
    
    # Examples section
    with gr.Group(elem_classes="examples-section"):
        gr.Markdown("**Try these examples**", elem_classes="examples-title")
        gr.Examples(
            examples=[
                [45, "add", 3],
                [100, "subtract", 25],
                [12, "multiply", 8],
                [144, "divide", 12],
            ],
            inputs=[num1, operation, num2],
            outputs=[result],
            fn=calculate,
            cache_examples=False
        )
    
    # Auto-calculate on any input change
    for component in [num1, num2, operation]:
        component.change(
            fn=calculate,
            inputs=[num1, operation, num2],
            outputs=[result],
            api_visibility="public"
        )

if __name__ == "__main__":
    demo.launch(
        theme=gr.themes.Soft(
            primary_hue="indigo",
            secondary_hue="blue",
            neutral_hue="slate",
            font=gr.themes.GoogleFont("Inter"),
            text_size="md",
            spacing_size="md",
            radius_size="lg"
        ).set(
            body_background_fill="#f8fafc",
            block_title_text_weight="600",
            block_label_text_weight="600",
            button_primary_background_fill="#6366f1",
            button_primary_background_fill_hover="#4f46e5",
            button_primary_text_color="white",
        ),
        css=custom_css,
        footer_links=[
            {"label": "Built with anycoder", "url": "https://huggingface.co/spaces/akhaliq/anycoder"}
        ]
    )