def shopping_cart():
    """TODO: Display the contents of the shopping cart. The shopping cart is a
    list held in the session that contains all the melons to be added. Check
    accompanying screenshots for details."""

    if 'cart' in session:
        id_list = session['cart']
    else:
        flash ('Your cart is empty')
        session['cart'] = []
        id_list = session['cart']

    melon_dict = {}
    total = 0

    for i in id_list:

        melon_name = model.get_melon_by_id(i).common_name
        melon_price = float(model.get_melon_by_id(i).price)
        
        if i not in melon_dict:
            melon_quantity = 1
        else:
            melon_quantity += 1

        melon_subtotal = (melon_price * melon_quantity) 
        melon_dict[i] = {'name': melon_name, 'price': melon_price, 'quantity': melon_quantity, 'subtotal': melon_subtotal}

        total += melon_dict[i]['price']
        
    return render_template("cart.html", current_list= melon_dict, total= total)

def shopping_cart():
    if "cart" in session:
        cart_list = session["cart"]

        melon_ids = {}
        for melon_id in cart_list:
            if melon_id in melon_ids:
                melon_ids[melon_id] += 1
            else:
                melon_ids[melon_id] = 1

        melon_dict = {}
        total = 0
        for melon_id, quantity in melon_ids.items():
            melon = model.get_melon_by_id(melon_id)
            melon_dict[melon_id] = {
                "common_name": melon.common_name,
                "qty": quantity,
                "price": melon.price,
                "subtotal": melon.price * quantity
            }
            total += melon_dict[melon_id]['subtotal']
        basket = melon_dict.keys()
    
        # print "TESTING DICTIONARY", melon_ids
        print melon_dict

    return render_template("cart.html",
                  melon_dict = melon_dict, basket = basket, total = total)

    """TODO: Display the contents of the shopping cart. The shopping cart is a
    list held in the session that contains all the melons to be added. Check
    accompanying screenshots for details."""
    return render_template("cart.html")

def shopping_cart():
    """TODO: Display the contents of the shopping cart. The shopping cart is a
    list held in the session that contains all the melons to be added. Check
    accompanying screenshots for details."""

    melon_dict = {}
    cart_list = session.get("cart", [])

    if not cart_list:
        flash("Your cart is empty")

    # create a dictionary where key = melon_id and value = dictionary with key=quantity, key=total
    for melon_id in cart_list:
        melon_dict.setdefault(melon_id, {})
        melon_dict[melon_id]["quantity"] = melon_dict[melon_id].get("quantity", 0) + 1
    melon_info_list = [model.get_melon_by_id(melon_id) for melon_id in melon_dict] 

    cart_total = 0 
    for melon in melon_info_list:
        quantity = melon_dict[melon.id]["quantity"]
        total = melon.price * quantity
        cart_total += total
        melon_dict[melon.id]["total"] = total
        melon_dict[melon.id]["formatted_price"] = "$%.2f" % melon.price
        melon_dict[melon.id]["formatted_total_price"] = "$%.2f" % total

    cart_total_string = "Total: $%.2f" % cart_total

    return render_template("cart.html", melon_list = melon_info_list, quantotals = melon_dict, 
        cart_total = cart_total_string)

def shopping_cart():
    """TODO: Display the contents of the shopping cart. The shopping cart is a
    list held in the session that contains all the melons to be added. Check
    accompanying screenshots for details."""

    # this is where we add the logic to get the qty from the "session cart"
    #   that was "built" the "add_to_cart" function.
    # then use the melon ids in the "cart" create a list of melons.  
    # The melon details can be retrieved using the "model.get_melon_by_id".
    # get_melon_by_id returns id, melon_type, common_name, price, imgurl,
    #    flesh_color, rind_color, seedless
    # Before passing the "melons" remember to calculate the "total price"
    # and add it to the retrieved list of attributes.
    if "cart" in session:
        melons = []
        running_total = 0
        for key in session["cart"]:

            melon =  model.get_melon_by_id(key)

            total_price = melon.price * session["cart"][key]
            print total_price

            melons = melons + [[melon.common_name, session["cart"][key], 
                               melon.price, total_price]]
            print "melons =",
            print melons
            running_total = running_total + total_price
            print "Order total = ", running_total

        session["order total"] = running_total
        print "session = ", session
    return render_template("cart.html", melons = melons)

def shopping_cart():
    """TODO: Display the contents of the shopping cart. The shopping cart is a
    list held in the session that contains all the melons to be added. Check
    accompanying screenshots for details."""
    
    #assigning the variable cart_items to the 'cart' value, which as indicated is a dictionary itself, with ids as keys and qty as values.
    cart_items = session['cart']  

    #we initialize an empty list b/c in our for loop, we are creating a list of dictionaries, with keys name, price, qty and values name, price, qty based on ids.
    melon_details = []

    #this for loop interates over each id:qty in cart_items
    for id, quantity in cart_items.iteritems():
        #call the get_melon_by_id() function so we can obtain all info for each melon.  we will use this info below to create yet another dictionary
        melon = model.get_melon_by_id(id)
        #referencing attributes of melon and assigning as values to the melon_dict.
        melon_dict = {
            "name": melon.common_name,
            "price": melon.price,
            "quantity": quantity
        }
        #appending to the melon_details list initiated above the for loop
        melon_details.append(melon_dict)

    #the list melon_details is then passed to the html document, which iterates over this list to create the items in the cart.
    return render_template("cart.html", melons = melon_details)

def shopping_cart():
    """TODO: Display the contents of the shopping cart. The shopping cart is a
    list held in the session that contains all the melons to be added. Check
    accompanying screenshots for details."""
    melons = {}
    order_total=0
    if 'cart' in session:
        for melon_id in session["cart"]:
            if melons.get(melon_id) == None:
                melons[melon_id] = {}
                melons[melon_id]['melon']=model.get_melon_by_id(melon_id)
                melons[melon_id]["qty"]=1
            else:
                melons[melon_id]['qty'] += 1
            melons[melon_id]['total']= melons[melon_id]["qty"]*melons[melon_id]['melon'].price
           
        for melon_id in melons:
            order_total=order_total+float(melons[melon_id]['total'])
        order_total="$%.2f" % order_total

        return render_template("cart.html",
                                melon_dict = melons,
                                order_total = order_total)
    else:
        return render_template("cart.html",
                                melon_dict = {},
                                order_total = 0)

def shopping_cart():
    # if there's nothing in the cart, redirect to melons page
    if 'cart' not in session:
        return redirect("/melons")

    # initialize empty dictionary for the melon count
    melon_count = {}

    # this block iterates through a list of melon IDs and generates a dictionary with key: melon id, value: # of occurrences
    for melon_id in session['cart']:
        if melon_count.get(melon_id):
            melon_count[melon_id] += 1
        else:
            melon_count[melon_id] = 1

    print melon_count
    melon_dict = {}
    cart_total = 0

    #for each melon id, and the quantity for that melon type, in the melon_count dict, get the melon object associated with that melon id from the db using the model. Also calculates the total cost for the cart.
    for melon_id, qty in melon_count.iteritems():
        melon = model.get_melon_by_id(melon_id)
        melon_dict[melon] = qty
        cart_total += (qty * melon.price)

    print melon_dict

    #convert the cart total price to a two-digit float string
    cart_total_float = "%0.2f" % cart_total

    #re-cast variables as variables we can pass into cart.html to use with jinja
    return render_template("cart.html", cart = melon_dict, total = cart_total_float)

def shopping_cart():
    """Shopping cart page: displays the contents of the shopping cart with a list of melons, quantities, prices, and total prices held in this session."""
   
    list_of_melons = session.get('ourcart', [])
       
    # for melon_id in list_of_melons: 
    #     melon = model.get_melon_by_id(melon_id)
    #     melon_name_list.append(melon.common_name)
    #     melon_price_list.append(melon.price) 
    melon_qty = {}
    for melon_id in list_of_melons:
        if melon_qty.get(melon_id):
            melon_qty[melon_id] += 1
        else:
            melon_qty[melon_id] = 1
    print melon_qty

    melon_objects = {}
    for melon_id, qty in melon_qty.items():
        melon_obj = model.get_melon_by_id(melon_id)
        melon_objects[melon_obj] = qty

    cart_total = 0;
    for melon, qty in melon_objects.items(): 
        cart_total += melon.price * qty


    print melon_objects

    return render_template("cart.html",
            melons = melon_objects,
            total = cart_total)

def shopping_cart():
    """TODO: Display the contents of the shopping cart. The shopping cart is a
    list held in the session that contains all the melons to be added. Check
    accompanying screenshots for details."""
    melons = [ (model.get_melon_by_id(int(id)), count) for id, count in session.setdefault("cart", {}).items() ]
    total = sum([melon[0].price * melon[1] for melon in melons])
    return render_template("cart.html", melons = melons, total=total)

def show_melon(id):
    """This page shows the details of a given melon, as well as giving an
    option to buy the melon."""
    melon = model.get_melon_by_id(id)
    print melon
    return render_template("melon_details.html",
                  display_melon = melon)

def add_to_cart(id):
    """TODO: Finish shopping cart functionality using session variables to hold
    cart list.

    Intended behavior: when a melon is added to a cart, redirect them to the
    shopping cart page, while displaying the message
    "Successfully added to cart" """

    temp_id=str(id)

    if 'cart' in session:

        # if temp_id in session['cart']:
        #     session['cart'][temp_id] += 1

        # else:
        #     session['cart'][temp_id] = 1
        session['cart'][temp_id] = session['cart'].get(temp_id, 0) + 1

    else:
        print "initializing cart in session"
        session['cart'] = {temp_id: 1}
    
    display_melon = model.get_melon_by_id(id)

    flash("You successfully added one " + display_melon.common_name +" to your cart!")
    return redirect('/cart')

def shopping_cart():
    """TODO: Display the contents of the shopping cart. The shopping cart is a
    list held in the session that contains all the melons to be added. Check
    accompanying screenshots for details."""
    
    if 'cart' in session:
        if 'cart' != {}:
            cart_items = session['cart']   

            melon_details = []

            for id, quantity in cart_items.iteritems():
                melon = model.get_melon_by_id(id)
                melon_dict = {
                    "name": melon.common_name,
                    "price": melon.price,
                    "quantity": quantity,
                    "total": melon.price * quantity
                }
                melon_details.append(melon_dict)

            order_total = 0
            for melon in melon_details:
                order_total += melon['total']

            return render_template("cart.html", melons = melon_details, 
                                                order_total = order_total)
    else:
        return render_template("cart.html", melons = None, order_total = 0)

def shopping_cart():
    """TODO: Display the contents of the shopping cart. The shopping cart is a
    list held in the session that contains all the melons to be added. Check
    accompanying screenshots for details."""

    tally = collections.Counter(session['cart'])
    purchased_melons = {m_id: model.get_melon_by_id(m_id) for m_id in tally}

    if not purchased_melons:
        flash("Buy melons!")

    return render_template("cart.html", melon_list=purchased_melons, qty=tally, total_price=session['total'])

def shopping_cart():
    """TODO: Display the contents of the shopping cart. The shopping cart is a
    list held in the session that contains all the melons to be added. Check
    accompanying screenshots for details."""
    melon_types = {}
    total_price = 0.00
    if "cart" in session:
        for key, quantity in session["cart"].iteritems():
            melon = model.get_melon_by_id(int(key))
            total = melon.price * quantity
            melon_types[melon.common_name] = {'quantity': quantity, 'price': melon.price, 'total': total}
            total_price += total
    return render_template("cart.html", display_melons=melon_types, total_price = total_price)

def shopping_cart():
    """TODO: Display the contents of the shopping cart. The shopping cart is a
    list held in the session that contains all the melons to be added. Check
    accompanying screenshots for details."""
    melons = []
    total = 0
    if "cart" in session.keys():
        for key in session["cart"].iterkeys():
            melon = model.get_melon_by_id(str(key))
            melons.append(melon)
            melon.quantity = session["cart"][str(key)]
            total += melon.quantity * melon.price

    return render_template("cart.html", cart_contents = melons, order_total = total)

def shopping_cart():
    """TODO: Display the contents of the shopping cart. The shopping cart is a
    list held in the session that contains all the melons to be added. Check
    accompanying screenshots for details."""
    melons_in_cart = []
    total = 0

    if "cart" in session:
        for id in session["cart"]:
            melon = model.get_melon_by_id(id)
            melons_in_cart.append(melon)
            total += (melon.price * session["cart"][id])

    return render_template("cart.html", melons = melons_in_cart, total = total)

def add_to_cart(id):

    session.setdefault('shopping_cart', []).append(id)
    melon = model.get_melon_by_id(id)
    """TODO: Finish shopping cart functionality using session variables to hold
    cart list.
    
    Intended behavior: when a melon is added to a cart, redirect them to the
    shopping cart page, while displaying the message
    "Successfully added to cart" """

    flash(Markup("Successfully added to <a href='/cart'>cart</a>"))
    # return render_template("cart.html")
    return render_template("melon_details.html", display_melon = melon)

def add_to_cart(id):
    """TODO: Finish shopping cart functionality using session variables to hold
    cart list.
    
    Intended behavior: when a melon is added to a cart, redirect them to the
    shopping cart page, while displaying the message
    "Successfully added to cart" """
    
    session['cart'] = session.get('cart', []) + [id]
    session['total'] += model.get_melon_by_id(id).price

    print session

    flash("Successfully added to cart")
    return redirect("/cart")

def shopping_cart():
    """TODO: Display the contents of the shopping cart. The shopping cart is a
    list held in the session that contains all the melons to be added. Check
    accompanying screenshots for details."""

    melon_quantity = session.get('cart')

    melon_dict = {}
    for melon_id, quantity in melon_quantity.items():
        melon = model.get_melon_by_id(melon_id)
        print "this is melon: " , melon
        melon_dict[melon] = quantity

    print melon_dict

    return render_template("cart.html", melons = melon_dict)

def shopping_cart():
    melons = {}
    total = 0
    ids = session.get('shopping_cart')
    if ids:
        for melon_id in ids:
            melon = model.get_melon_by_id(melon_id)
            melons.setdefault(melon_id, {'melon': None, 'count': 0})
            melons[melon_id]['melon'] = melon
            melons[melon_id]['count'] += 1
            total += melon.price

    """TODO: Display the contents of the shopping cart. The shopping cart is a
    list held in the session that contains all the melons to be added. Check
    accompanying screenshots for details."""
    return render_template("cart.html", melons=melons, total=total)