package cart.screenWranglers;

import cart.Cart;
import cart.Category;
import cart.Item;
import cart.ItemInventory;
import cart.applicationBeans.CategoryBean;
import cart.applicationBeans.ItemBean;
import cart.applicationBeans.ItemCategoryBean;
import cart.applicationBeans.ItemInventoryBean;
import java.text.DecimalFormat;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.ListIterator;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import javax.servlet.ServletContext;

//CartScreenWrangler
//author - Lawrence Truett - FluffyCat.com
//date - July 15, 2003 - San Diego, CA
public class CartScreenWrangler extends BaseScreenWrangler {
    static final DecimalFormat decimalFormat = 
        new DecimalFormat("0.00");
    
    public CartScreenWrangler() {this("/cart/jsps/Cart.jsp");}
    
    public CartScreenWrangler(String nextScreenIn) {
        super(nextScreenIn);
    }
    
    public void wrangleScreen(HttpServletRequest request, 
                              ServletContext servletContext) {
        
        char action = baseNextScreenSwitch(request, 
                                           servletContext); 
               
        if (action != 'R') {
            getNextWrangler().prepFirstScreen(request, 
                                              servletContext);
        } else {
            StringBuffer cartSubs = allScreens(request, 
                                               servletContext);
            request.setAttribute("jspCart", cartSubs);
            jspCatAttribute(request);
            jspItemAttribute(request);
        }
    }
    
    void prepFirstScreen(HttpServletRequest request, 
                         ServletContext servletContext) {
        StringBuffer cartSubs = allScreens(request, servletContext);
        request.setAttribute("jspCart", cartSubs);
        jspCatAttribute(request);
        jspItemAttribute(request);
    }
    
    StringBuffer allScreens(HttpServletRequest request, 
                            ServletContext servletContext) {
        ItemBean itemBean = 
            (ItemBean)servletContext.getAttribute("itemBean");
        ItemInventoryBean itemInventoryBean = 
            (ItemInventoryBean)servletContext.getAttribute(
                "itemInventoryBean");
        StringBuffer cartSubs = new StringBuffer();        
        
        Cart cart = 
            (Cart)(request.getSession().getAttribute("cart"));
      
        if (null == cart) {
            cart = new Cart(itemInventoryBean);
            request.getSession().setAttribute("cart", cart);
        }

        char subAction;
        String stringSubAction = 
            request.getParameter("subaction");
        if (null == stringSubAction) {
            subAction = ' ';
        } else {
            subAction = stringSubAction.charAt(0);
        }
        String stringItem = request.getParameter("item");
        if (stringItem == null) {stringItem = "0";}
        long longItem = Long.parseLong(stringItem);
        long amount = 0;
        String stringAmount = request.getParameter("amount");
        if (null != stringAmount) {
            amount = new Long(stringAmount).longValue();
        }
        
        if (subAction == 'A') {
            Item item = itemBean.getItem(longItem);
            long reserved = cart.reserve(item, amount);
            if (reserved == amount) {
                cartSubs.append("<br"+">item " + 
                                item.getDescription() + 
                                " reserved");
            } else {
                if (reserved > 0) {
                    cartSubs.append("<br"+">only " + 
                                     reserved + 
                                     " of item " + 
                                     item.getDescription() + 
                                     " reserved");
                } else {
                    cartSubs.append("<br>item " + 
                                    item.getDescription() + 
                                    " not reserved");
                }
            }
        }
        
        if (subAction == 'R') {
            Item item = itemBean.getItem(longItem);
            boolean removed = cart.removeItem(item);
            if (removed) {
                cartSubs.append("<br>item " + 
                                item.getDescription() + 
                                " removed");
            } else {
                cartSubs.append("<br>item " + 
                                item.getDescription() + 
                                " not removed");
            }
        }
        
        Object items[] = cart.getItemArray();
        for (int i = 0; items.length > i; i++) {
            cartSubs.append("<br"+">");
            Item item = (Item)items[i];
            long itemKey = item.getKey();
            cartSubs.append("<br"+">Key: " + itemKey);
            cartSubs.append("<br"+">Price: " + 
                decimalFormat.format(item.getPrice()));
            cartSubs.append("<br"+">Description: " + 
                item.getDescription());
            cartSubs.append("<br"+">Type: " + 
                item.getItemType());
            long amountInCart = cart.getItemQuantity(item);
            cartSubs.append("<br"+">Amount of " + 
                item.getDescription() + 
                " in Cart: " + 
                amountInCart);
            cartSubs.append("<br>Total for item " + 
                item.getDescription() + 
                " in Cart: " + 
                decimalFormat.format(cart.getItemTotal(item)));
            
            if (item.getHasInventory()) {
                ItemInventory itemInventory = 
                    itemInventoryBean.getItemInventory(itemKey);
                long inventory = itemInventory.getInventory();
                long reserved = itemInventory.getReserved();
                cartSubs.append(
                		"<br>Total Item Inventory: " + inventory);
                cartSubs.append(
                		"<br>Total Item Reserved: " + reserved);
                if ((inventory - reserved) > 0) {
                    cartSubs.append("<br"+
                        "><a href=\"/servlet/servlet."+
                        "ControllerServlet?"+
                        "action=R&subaction=A&item=");
                    cartSubs.append(itemKey + 
                        "&amount=1\">Add One More To Cart</a>");
                } else {
                    cartSubs.append("<br>Item is out of Stock");
                }
            } else {
                cartSubs.append("<br>Total Item Inventory: NA");
                cartSubs.append("<br>Total Item Reserved: NA");
                if (!item.getOnePerCart()) {
                    cartSubs.append("<br"+
                        "><a href=\"/servlet/servlet."+
                        "ControllerServlet?"+
                        "action=R&subaction=A&item=");
                    cartSubs.append(itemKey + 
                        "&amount=1\">Add One More To Cart</a>");
                } else if ((amountInCart < 1) && 
                		   (item.getOnePerCart())) {
                    cartSubs.append("<br"+
                        "><a href=\"/servlet/servlet."+
                        "ControllerServlet?"+
                        "action=R&subaction=R&item=");
                    cartSubs.append(itemKey + 
                        "&amount=1\">Add To Cart</a>");
                }
            }
            if (amountInCart > 0) {
                if (item.getOnePerCart()) {
                    cartSubs.append("<br"+
                        "><a href=\"/servlet/servlet."+
                        "ControllerServlet?"+
                        "action=R&subaction=R&item=");
                    cartSubs.append(itemKey + 
                        "&amount=-1\">Remove From Cart</a>");
                } else {
                    cartSubs.append("<br"+
                        "><a href=\"/servlet/servlet."+
                        "ControllerServlet?"+
                        "action=R&subaction=R&item=");
                    cartSubs.append(itemKey + 
                        "&amount=-1\">Remove One From Cart</a>");
                    cartSubs.append("<br"+
                        "><a href=\"/servlet/servlet."+
                        "ControllerServlet?"+
                        "action=R&subaction=R&item=");
                    cartSubs.append(itemKey + 
                        "\">Remove All From Cart</a>");
                }
            }
            cartSubs.append("<"+"br>");
            cartSubs.append("<"+"img src=\"\\cart\\images\\");            
            cartSubs.append(item.getLargeGraphic());
            cartSubs.append("\" width=\"200\">");
        }
        cartSubs.append("<br><br>Cart Total: " + 
            decimalFormat.format(cart.getCartTotal()));
        
        return cartSubs;
    }
}