from flask import Blueprint, render_template, request, session, jsonify
from salesforce import get_salesforce_connection

sf = get_salesforce_connection()
cart_blueprint = Blueprint('cart', __name__)

@cart_blueprint.route("/cart", methods=["GET"])
def cart():
    email = session.get('user_email')
    if not email:
        return redirect(url_for("login"))

    try:
        # Fetch cart items with Category and Section
        result = sf.query(f"""
            SELECT Name, Price__c, Quantity__c, Add_Ons__c, Add_Ons_Price__c, Image1__c, Instructions__c, Category__c, Section__c
            FROM Cart_Item__c
            WHERE Customer_Email__c = '{email}'
        """)
        cart_items = result.get("records", [])

        subtotal = sum(item['Price__c'] for item in cart_items)

        # Fetch reward points
        customer_result = sf.query(f"""
            SELECT Reward_Points__c 
            FROM Customer_Login__c
            WHERE Email__c = '{email}'
        """)
        reward_points = customer_result['records'][0].get('Reward_Points__c', 0) if customer_result['records'] else 0

        # Fetch coupons for the user
        coupon_result = sf.query(f"""
            SELECT Coupon_Code__c FROM Referral_Coupon__c WHERE Referral_Email__c = '{email}'
        """)
        if coupon_result["records"]:
            raw_coupons = coupon_result["records"][0].get("Coupon_Code__c", "")
            coupons = raw_coupons.split("\n") if raw_coupons else []
        else:
            coupons = []

        # Initialize suggestions as an empty list
        suggestions = []

        # If there are items in the cart, fetch suggestions
        if cart_items:
            # Get the category and section of the first item in the cart
            first_item = cart_items[0]
            item_category = first_item.get('Category__c', 'All')
            item_section = first_item.get('Section__c', 'Biryanis')

            # Define section-to-complementary section mapping
            complementary_sections = {
                'Breads': ['Curries', 'Biryanis', 'Starters'],
                'Biryanis': ['Curries', 'Starters', 'Dessetett
s'],
                'Curries': ['Biryanis', 'Breads', 'Starters'],
                'Starters': ['Biryanis', 'Curries', 'Desserts'],
                'Desserts': ['Biryanis', 'Curries', 'Soft Drinks'],
                'Soft Drinks': ['Starters', 'Biryanis', 'Curries']
            }

            # Get the complementary sections for the selected section
            suggested_sections = complementary_sections.get(item_section, [])

            # Fetch suggestions from the complementary sections
            try:
                for suggested_section in suggested_sections:
                    if item_category == "All":
                        query = f"""
                            SELECT Name, Price__c, Image1__c
                            FROM Menu_Item__c
                            WHERE Section__c = '{suggested_section}' 
                            AND (Veg_NonVeg__c = 'Veg' OR Veg_NonVeg__c = 'Non veg')
                            LIMIT 4
                        """
                    else:
                        query = f"""
                            SELECT Name, Price__c, Image1__c
                            FROM Menu_Item__c
                            WHERE Section__c = '{suggested_section}' 
                            AND Veg_NonVeg__c = '{item_category}'
                            LIMIT 4
                        """
                    suggestion_result = sf.query(query)
                    suggestions.extend(suggestion_result.get("records", []))
                if len(suggestions) > 4:
                    suggestions = suggestions[:4]
            except Exception as e:
                print(f"Error fetching suggestions: {e}")

        return render_template(
            "cart.html",
            cart_items=cart_items,
            subtotal=subtotal,
            reward_points=reward_points,
            customer_email=email,
            coupons=coupons,
            suggestions=suggestions
        )

    except Exception as e:
        print(f"Error fetching cart items: {e}")
        return render_template("cart.html", cart_items=[], subtotal=0, reward_points=0, coupons=[], suggestions=[])

@cart_blueprint.route("/add_suggestion_to_cart", methods=["POST"])
def add_suggestion_to_cart():
    try:
        data = request.get_json()
        item_name = data.get('item_name').strip()
        item_price = data.get('item_price')
        item_image = data.get('item_image')
        customer_email = data.get('customer_email')
        addons = data.get('addons', [])
        instructions = data.get('instructions', "")

        addons_price = 0
        addons_string = "None"

        query = f"""
            SELECT Id, Quantity__c, Add_Ons__c, Add_Ons_Price__c, Instructions__c 
            FROM Cart_Item__c
            WHERE Customer_Email__c = '{customer_email}' AND Name = '{item_name}'
        """
        result = sf.query(query)
        cart_items = result.get("records", [])

        if cart_items:
            cart_item_id = cart_items[0]['Id']
            existing_quantity = cart_items[0]['Quantity__c']
            existing_addons = cart_items[0].get('Add_Ons__c', "None")
            existing_addons_price = cart_items[0].get('Add_Ons_Price__c', 0)
            existing_instructions = cart_items[0].get('Instructions__c', "")

            combined_addons = existing_addons if existing_addons != "None" else ""
            if addons:
                combined_addons = f"{combined_addons}; {addons}".strip("; ")

            combined_instructions = existing_instructions
            if instructions:
                combined_instructions = f"{combined_instructions} | {instructions}".strip(" | ")

            combined_addons_list = combined_addons.split("; ")
            combined_addons_price = sum(
                float(addon.split("($")[1][:-1]) for addon in combined_addons_list if "($" in addon
            )

            sf.Cart_Item__c.update(cart_item_id, {
                "Quantity__c": existing_quantity + 1,
                "Add_Ons__c": combined_addons,
                "Add_Ons_Price__c": combined_addons_price,
                "Instructions__c": combined_instructions,
                "Price__c": (existing_quantity + 1) * float(item_price) + combined_addons_price
            })
        else:
            total_price = float(item_price) + addons_price
            sf.Cart_Item__c.create({
                "Name": item_name,
                "Price__c": total_price,
                "Base_Price__c": item_price,
                "Quantity__c": 1,
                "Add_Ons_Price__c": addons_price,
                "Add_Ons__c": addons_string,
                "Image1__c": item_image,
                "Customer_Email__c": customer_email,
                "Instructions__c": instructions
            })

        return jsonify({"success": True, "message": "Item added to cart successfully."})

    except Exception as e:
        print(f"Error adding item to cart: {str(e)}")
        return jsonify({"success": False, "error": str(e)})

@cart_blueprint.route('/remove/<item_name>', methods=['POST'])
def remove_cart_item(item_name):
    try:
        customer_email = session.get('user_email')
        if not customer_email:
            return jsonify({'success': False, 'message': 'User email not found. Please log in again.'}), 400
        
        query = f"""
            SELECT Id FROM Cart_Item__c 
            WHERE Customer_Email__c = '{customer_email}' AND Name = '{item_name}'
        """
        result = sf.query(query)
        
        if result['totalSize'] == 0:
            return jsonify({'success': False, 'message': 'Item not found in cart.'}), 400
        
        cart_item_id = result['records'][0]['Id']
        sf.Cart_Item__c.delete(cart_item_id)
        return jsonify({'success': True, 'message': f"'{item_name}' removed successfully!"}), 200
    except Exception as e:
        print(f"Error: {str(e)}")
        return jsonify({'success': False, 'message': f"An error occurred: {str(e)}"}), 500

@cart_blueprint.route("/update_quantity", methods=["POST"])
def update_quantity():
    print("Handling update_quantity request...")
    data = request.json
    email = data.get('email')
    item_name = data.get('item_name')

    try:
        quantity = int(data.get('quantity'))
    except (ValueError, TypeError):
        return jsonify({"success": False, "error": "Invalid quantity provided."}), 400

    if not email or not item_name or quantity is None:
        return jsonify({"success": False, "error": "Email, item name, and quantity are required."}), 400

    try:
        cart_items = sf.query(
            f"SELECT Id, Quantity__c, Price__c, Base_Price__c, Add_Ons_Price__c FROM Cart_Item__c "
            f"WHERE Customer_Email__c = '{email}' AND Name = '{item_name}'"
        )['records']

        if not cart_items:
            return jsonify({"success": False, "error": "Cart item not found."}), 404

        cart_item_id = cart_items[0]['Id']
        base_price = cart_items[0]['Base_Price__c']
        addons_price = cart_items[0].get('Add_Ons_Price__c', 0)

        new_item_price = (base_price * quantity) + addons_price

        sf.Cart_Item__c.update(cart_item_id, {
            "Quantity__c": quantity,
            "Price__c": new_item_price,
        })

        cart_items = sf.query(f"""
            SELECT Price__c, Add_Ons_Price__c 
            FROM Cart_Item__c 
            WHERE Customer_Email__c = '{email}'
        """)['records']
        new_subtotal = sum(item['Price__c'] for item in cart_items)

        return jsonify({"success": True, "new_item_price": new_item_price, "subtotal": new_subtotal})

    except Exception as e:
        print(f"Error updating quantity: {str(e)}")
        return jsonify({"success": False, "error": str(e)}), 500

@cart_blueprint.route("/checkout", methods=["POST"])
def checkout():
    email = session.get('user_email')
    user_id = session.get('user_name')
    table_number = session.get('table_number')

    print(f"Session Email: {email}, User ID: {user_id}, Table Number: {table_number}")

    if not email or not user_id:
        print("User not logged in")
        return jsonify({"success": False, "message": "User not logged in"})

    try:
        data = request.json
        selected_coupon = data.get("selectedCoupon", "").strip() if data.get("selectedCoupon") else None
        print(f"Selected Coupon: {selected_coupon}")

        result = sf.query(f"""
            SELECT Id, Name, Price__c, Add_Ons_Price__c, Quantity__c, Add_Ons__c, Instructions__c, Image1__c
            FROM Cart_Item__c
            WHERE Customer_Email__c = '{email}'
        """)
        
        cart_items = result.get("records", [])
        print(f"Cart Items Retrieved: {cart_items}")

        if not cart_items:
            print("Cart is empty")
            return jsonify({"success": False, "message": "Cart is empty"})

        # Update Total_Ordered__c in Custom_Dish__c for each custom dish in the cart
        for item in cart_items:
            item_name = item['Name']
            quantity = item['Quantity__c']
            custom_dish_query = f"SELECT Id, Total_Ordered__c FROM Custom_Dish__c WHERE Name = '{item_name}'"
            custom_dish_result = sf.query(custom_dish_query)

            if custom_dish_result['totalSize'] > 0:
                custom_dish = custom_dish_result['records'][0]
                dish_id = custom_dish['Id']
                total_ordered = custom_dish.get('Total_Ordered__c', 0) or 0
                sf.Custom_Dish__c.update(dish_id, {
                    'Total_Ordered__c': total_ordered + quantity
                })

        total_price = sum(item['Price__c'] for item in cart_items)
        print(f"Total Price: {total_price}")

        discount = 0

        coupon_query = sf.query(f"""
            SELECT Id, Coupon_Code__c FROM Referral_Coupon__c WHERE Referral_Email__c = '{email}'
        """)
        print(f"Coupon Query Results: {coupon_query}")

        has_coupons = bool(coupon_query["records"])
        print(f"Has Coupons: {has_coupons}")

        if selected_coupon:
            discount = total_price * 0.10
            print(f"Discount Applied: {discount}")
            
            referral_coupon_id = coupon_query["records"][0]["Id"]
            print(f"Referral Coupon ID: {referral_coupon_id}")

            existing_coupons = coupon_query["records"][0]["Coupon_Code__c"].split("\n")
            print(f"Existing Coupons Before Removal: {existing_coupons}")

            updated_coupons = [coupon for coupon in existing_coupons if coupon.strip() != selected_coupon]
            updated_coupons_str = "\n".join(updated_coupons).strip()

            print(f"Updated Coupons After Removal: {updated_coupons}")

            if not updated_coupons:
                updated_coupons_str = None
                print("No Coupons Remaining. Setting to None")

            print(f"Updating Referral Coupon: {updated_coupons_str}")
            sf.Referral_Coupon__c.update(referral_coupon_id, {
                "Coupon_Code__c": updated_coupons_str
            })
        else:
            reward_points_to_add = total_price * 0.10
            print(f"Reward Points to Add: {reward_points_to_add}")

            customer_record = sf.query(f"""
                SELECT Id, Reward_Points__c FROM Customer_Login__c
                WHERE Email__c = '{email}'
            """)
            print(f"Customer Reward Points Query: {customer_record}")
            
            customer = customer_record.get("records", [])[0] if customer_record else None
            if customer:
                current_reward_points = customer.get("Reward_Points__c") or 0
                print(f"Current Reward Points: {current_reward_points}")
                new_reward_points = current_reward_points + reward_points_to_add
                print(f"New Reward Points: {new_reward_points}")

                sf.Customer_Login__c.update(customer["Id"], {
                    "Reward_Points__c": new_reward_points
                })

        total_bill = total_price - discount
        print(f"Total Bill After Discount: {total_bill}")

        order_details = "\n".join(
            f"{item['Name']} x{item['Quantity__c']} | Add-Ons: {item.get('Add_Ons__c', 'None')} | "
            f"Instructions: {item.get('Instructions__c', 'None')} | "
            f"Price: ${item['Price__c']} | Image: {item['Image1__c']}"
            for item in cart_items
        )
        print(f"Order Details: {order_details}")

        customer_query = sf.query(f"""
            SELECT Id FROM Customer_Login__c
            WHERE Email__c = '{email}'
        """)
        
        customer_id = customer_query["records"][0]["Id"] if customer_query["records"] else None
        print(f"Customer ID: {customer_id}")

        if not customer_id:
            print("Customer record not found")
            return jsonify({"success": False, "message": "Customer record not found in Salesforce"})

        table_number = table_number if table_number != 'null' else None
        order_data = {
            "Customer_Name__c": user_id,
            "Customer_Email__c": email,
            "Total_Amount__c": total_price,
            "Discount__c": discount,
            "Total_Bill__c": total_bill,
            "Order_Status__c": "Pending",
            "Customer2__c": customer_id,
            "Order_Details__c": order_details,
            "Table_Number__c": table_number
        }
        print(f"Order Data: {order_data}")

        order_response = sf.Order__c.create(order_data)
        print(f"Order Response: {order_response}")

        if order_response:
            for item in cart_items:
                print(f"Deleting Cart Item: {item['Id']}")
                sf.Cart_Item__c.delete(item["Id"])

        return jsonify({"success": True, "message": "Order placed successfully!", "discount": discount, "totalBill": total_bill})

    except Exception as e:
        print(f"Error during checkout: {str(e)}")
        return jsonify({"success": False, "error": str(e)})