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import gradio as gr
import numpy as np
import sqlite3
import json
from PIL import Image, ImageDraw
import time

# ------ Tool Implementations ------
def get_recipe_by_ingredients(ingredients):
    """Find recipes based on available ingredients"""
    return {
        "recipes": [
            {"name": "Vegetable Stir Fry", "time": 20, "difficulty": "Easy"},
            {"name": "Pasta Primavera", "time": 30, "difficulty": "Medium"}
        ]
    }

def get_recipe_image(recipe_name):
    """Generate an image of the finished recipe"""
    # Create placeholder image
    img = Image.new('RGB', (300, 200), color=(73, 109, 137))
    d = ImageDraw.Draw(img)
    d.text((10,10), f"Image of: {recipe_name}", fill=(255,255,0))
    return img

def convert_measurements(amount, from_unit, to_unit):
    """Convert cooking measurements between units"""
    conversions = {
        ("tbsp", "tsp"): lambda x: x * 3,
        ("cups", "ml"): lambda x: x * 240,
        ("oz", "g"): lambda x: x * 28.35
    }
    conversion_key = (from_unit.lower(), to_unit.lower())
    if conversion_key in conversions:
        result = conversions[conversion_key](amount)
        return {"result": round(result, 2), "unit": to_unit}
    return {"error": "Conversion not supported"}

# ------ Recipe Database ------
def init_recipe_db():
    conn = sqlite3.connect(':memory:')
    c = conn.cursor()
    c.execute('''CREATE TABLE recipes
                 (id INTEGER PRIMARY KEY, name TEXT, ingredients TEXT, instructions TEXT, prep_time INT)''')
    
    recipes = [
        ("Classic Pancakes", json.dumps(["flour", "eggs", "milk", "baking powder"]), 
         "1. Mix dry ingredients\n2. Add wet ingredients\n3. Cook on griddle", 15),
        ("Tomato Soup", json.dumps(["tomatoes", "onion", "garlic", "vegetable stock"]), 
         "1. Sauté onions\n2. Add tomatoes\n3. Simmer and blend", 30),
        ("Chocolate Cake", json.dumps(["flour", "sugar", "cocoa", "eggs", "milk"]), 
         "1. Mix dry ingredients\n2. Add wet ingredients\n3. Bake at 350°F", 45)
    ]
    
    c.executemany("INSERT INTO recipes (name, ingredients, instructions, prep_time) VALUES (?,?,?,?)", recipes)
    conn.commit()
    return conn

# ------ Agent Logic ------
def process_query(query, db_conn):
    """Process user query"""
    print(f"Processing query: {query}")
    
    # Simple intent recognition
    if "recipe" in query.lower() or "make" in query.lower() or "cook" in query.lower():
        ingredients = [word for word in ["eggs", "flour", "milk", "tomatoes"] if word in query.lower()]
        if not ingredients: 
            ingredients = ["eggs", "flour"]
        return {
            "type": "recipes",
            "data": get_recipe_by_ingredients(ingredients)
        }
    elif "image" in query.lower() or "show" in query.lower():
        recipe_name = next((r for r in ["pancakes", "soup", "cake"] if r in query.lower()), "pancakes")
        return {
            "type": "image",
            "data": get_recipe_image(recipe_name)
        }
    elif "convert" in query.lower():
        words = query.split()
        try:
            amount = float(words[words.index("convert")+1])
            from_unit = words[words.index("convert")+2]
            to_unit = words[words.index("to")+1]
        except:
            amount = 2
            from_unit = "cups"
            to_unit = "ml"
        return {
            "type": "conversion",
            "data": convert_measurements(amount, from_unit, to_unit)
        }
    else:
        c = db_conn.cursor()
        c.execute("SELECT * FROM recipes WHERE name LIKE ?", (f"%{query}%",))
        return {
            "type": "db_recipes",
            "data": c.fetchall()
        }

# ------ Gradio Interface ------
def process_command(query):
    """Process text command"""
    # Initialize database on first run
    if not hasattr(process_command, "db_conn"):
        process_command.db_conn = init_recipe_db()
    
    # Process query
    result = process_query(query, process_command.db_conn)
    
    # Generate response
    response_text = ""
    image = None
    
    if result["type"] == "recipes":
        recipes = result["data"]["recipes"]
        response_text = f"Found {len(recipes)} recipes:\n"
        for recipe in recipes:
            response_text += f"- {recipe['name']} ({recipe['time']} mins)\n"
    elif result["type"] == "image":
        image = result["data"]
        response_text = "Here's an image of the recipe!"
    elif result["type"] == "conversion":
        conv = result["data"]
        response_text = f"Result: {conv.get('result', '?')} {conv.get('unit', '')}" + \
                       (f"\nError: {conv['error']}" if "error" in conv else "")
    elif result["type"] == "db_recipes":
        recipes = result["data"]
        response_text = f"Found {len(recipes)} recipes:\n" if recipes else "No recipes found."
        for recipe in recipes:
            response_text += f"- {recipe[1]} ({recipe[4]} mins)\n"
    
    # Return results
    return response_text, image

# ------ Create Gradio Interface ------
with gr.Blocks(title="Culinary Assistant") as demo:
    gr.Markdown("# 🧑‍🍳 MCP-Powered Culinary Assistant")
    
    with gr.Row():
        with gr.Column():
            text_input = gr.Textbox(label="Ask about recipes, conversions, or cooking tips")
            submit_btn = gr.Button("Get Answer", variant="primary")
        with gr.Column():
            text_output = gr.Textbox(label="Assistant Response", interactive=False)
            image_output = gr.Image(label="Recipe Image", interactive=False)
    
    submit_btn.click(
        fn=process_command,
        inputs=[text_input],
        outputs=[text_output, image_output]
    )
    
    gr.Examples(
        examples=[
            ["What can I make with eggs and flour?"],
            ["Show me tomato soup"],
            ["Convert 2 cups to milliliters"],
            ["Find chocolate cake recipes"]
        ],
        inputs=[text_input],
        outputs=[text_output, image_output],
        fn=process_command,
        cache_examples=True,
        label="Example Queries"
    )

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