import gradio as gr
import pandas as pd

# Function to load the menu data from Excel
def load_menu():
    menu_file = "menu.xlsx"  # Ensure this file exists in the same directory
    try:
        return pd.read_excel(menu_file)
    except Exception as e:
        raise ValueError(f"Error loading menu file: {e}")

# Function to filter menu items based on preference
def filter_menu(preference):
    menu_data = load_menu()

    if preference == "Halal/Non-Veg":
        filtered_data = menu_data[menu_data["Ingredients"].str.contains("Chicken|Mutton|Fish|Prawns|Goat", case=False, na=False)]
    elif preference == "Vegetarian":
        filtered_data = menu_data[~menu_data["Ingredients"].str.contains("Chicken|Mutton|Fish|Prawns|Goat", case=False, na=False)]
    elif preference == "Guilt-Free":
        filtered_data = menu_data[menu_data["Description"].str.contains(r"Fat: ([0-9]|10)g", case=False, na=False)]
    else:  # Default to "All"
        filtered_data = menu_data

    # Generate HTML for the menu
    html_content = ""
    for _, item in filtered_data.iterrows():
        html_content += f"""
        <div style="display: flex; align-items: center; border: 1px solid #ddd; border-radius: 8px; padding: 15px; margin-bottom: 10px; box-shadow: 0px 4px 8px rgba(0, 0, 0, 0.1);">
            <div style="flex: 1; margin-right: 15px;">
                <h3 style="margin: 0; font-size: 18px;">{item['Dish Name']}</h3>
                <p style="margin: 5px 0; font-size: 16px; color: #888;">${item['Price ($)']}</p>
                <p style="margin: 5px 0; font-size: 14px; color: #555;">{item['Description']}</p>
            </div>
            <div style="flex-shrink: 0; text-align: center;">
                <img src="{item['Image URL']}" alt="{item['Dish Name']}" style="width: 100px; height: 100px; border-radius: 8px; object-fit: cover; margin-bottom: 10px;">
                <button value="{item['Dish Name']}" onclick="selectDish('{item['Dish Name']}')" style="background-color: #28a745; color: white; border: none; padding: 8px 15px; font-size: 14px; border-radius: 5px; cursor: pointer;">Add</button>
            </div>
        </div>
        """
    return html_content

# Function to render dish details for the suggestion page
def render_dish_details(dish_name):
    print(f"Dish name received: {dish_name}")  # Debugging line
    menu_data = load_menu()
    try:
        dish = menu_data[menu_data["Dish Name"] == dish_name].iloc[0]
        return (
            dish["Image URL"],
            dish_name,
            dish["Description"],
            f"${dish['Price ($)']}"
        )
    except IndexError:
        raise ValueError(f"Dish '{dish_name}' not found!")

# Gradio app definition
def app():
    with gr.Blocks() as demo:
        gr.Markdown("## Menu with Dynamic Filters")

        selected_dish = gr.State("")  # State for the selected dish name

        # Menu components
        preference_selector = gr.Radio(
            choices=["All", "Vegetarian", "Halal/Non-Veg", "Guilt-Free"],
            value="All",
            label="Choose a Preference"
        )
        menu_html = gr.HTML(value=filter_menu("All"))

        # Suggestion page components
        suggestion_page = gr.Column(visible=False)
        dish_image = gr.Image(label="Dish Image")
        dish_name = gr.Markdown()
        dish_description = gr.Markdown()
        dish_price = gr.Markdown()

        # Functions
        def update_menu(preference):
            return filter_menu(preference)

        def show_suggestion(dish_name):
            try:
                img, name, desc, price = render_dish_details(dish_name)
                return (
                    gr.update(visible=False),
                    gr.update(visible=True),
                    img,
                    f"## {name}",
                    desc,
                    price
                )
            except ValueError as e:
                return (
                    gr.update(visible=True),
                    gr.update(visible=False),
                    "",
                    f"Error: {str(e)}",
                    "",
                    ""
                )

        # Event Handlers
        preference_selector.change(
            update_menu,
            inputs=[preference_selector],
            outputs=[menu_html]
        )

        menu_html.change(
            show_suggestion,
            inputs=[selected_dish],
            outputs=[menu_html, suggestion_page, dish_image, dish_name, dish_description, dish_price]
        )

        # Layout
        with gr.Row():
            menu_html

        with suggestion_page:
            dish_image
            dish_name
            dish_description
            dish_price

    return demo


if __name__ == "__main__":
    demo = app()
    demo.launch()