using MarketExplorer.Menu.Models;
using System.Collections.Generic;
using System.Linq;
using System.Xml;
using TradeIdeas.TIProData;
using TradeIdeas.TIProGUI;
using TradeIdeas.XML;

namespace MarketExplorer.Menu
{
    public class MarketExplorerMenuTreeGeneratorCommand
    {
        public List<MenuItem> MenuItemsMap { get; set; } = new List<MenuItem>();

        private byte[] MenuXml { get; set; }

        private XmlDocument MenuXmlDoc { get; set; }

        public MarketExplorerMenuTreeGeneratorCommand(byte[] menuXml)
        {
            MenuXml = menuXml;
        }

        public List<MenuItem> Execute()
        {
            MenuXmlDoc = new XmlDocument();
            MenuXmlDoc = XmlHelper.Get(MenuXml);

            // 1. Fist Pass - find all of the sub menu groupings, so generate the "map"
            MenuItemsMap = GenerateMenuItemsMap(MenuXmlDoc);

            // 2. GenerateMenuTree
            var menuTree = new List<MenuItem>();
            GenerateMenuTree(menuTree, string.Empty, MenuItemsMap);

            return menuTree;
        }


        private void GenerateMenuTree(List<MenuItem> tree, string parentId, List<MenuItem> allMenu)
        {
            foreach (var menu in allMenu.Where(x => x.Name.HasValue() && x.Parent.EqualsIgnoreCase(parentId)))
            {
                tree.Add(menu);
                if (allMenu.Any(x => x.Parent.EqualsIgnoreCase(menu.Name)))
                {
                    GenerateMenuTree(menu.Children, menu.Name, allMenu);
                }
            }
        }

        private List<MenuItem> GenerateMenuItemsMap(XmlDocument xmlDoc)
        {
            var rootMenuXml = xmlDoc.Node(0);

            if (rootMenuXml == null)
                return new List<MenuItem>();

            string type = rootMenuXml.Property("type");
            if (type != "windows")
            {
                return new List<MenuItem>();
            }

            var menuItemsMap = new List<MenuItem>();
            int count = rootMenuXml.Property("cnt", 0);
            for (int i = 1; i <= count; i++)
            {
                var path = rootMenuXml.Property("NAME" + i);
                var layout = rootMenuXml.Property("LAYOUT" + i);

                var name = path;
                var parentName = string.Empty;

                var subMenu = rootMenuXml.Property("CATEGORY" + i);
                var subMenuSplits = subMenu.Split('|');
                var subMenuFound = subMenu.HasValue() && subMenuSplits.Length > 0;
                if (subMenuFound)
                {
                    var parentExists = subMenuSplits.Length >= 0;
                    if (parentExists)
                    {
                        for (var subMenuSplitIndex = 0; subMenuSplitIndex < subMenuSplits.Length; subMenuSplitIndex++)
                        {
                            var subMenuName = subMenuSplits[subMenuSplitIndex];
                            parentName = subMenuName;
                            if (!menuItemsMap.Any(x => x.Parent == subMenuName))
                            {
                                var parentMenuItem = new MenuItem
                                {
                                    Name = subMenuName
                                };

                                if (subMenuSplitIndex > 0)
                                {
                                    parentMenuItem.Parent = subMenuSplits[subMenuSplitIndex - 1];
                                }
                                menuItemsMap.Add(parentMenuItem);
                            }
                        }
                    }
                }

                int id = rootMenuXml.Property("ID" + i, 0);
                var existingMenuItemMap = menuItemsMap.FirstOrDefault(x => x.Name == name);
                if (existingMenuItemMap != null)
                {
                    existingMenuItemMap.Id = id;
                    existingMenuItemMap.Name = name;
                    existingMenuItemMap.Parent = parentName;
                    existingMenuItemMap.Layout = layout;
                }
                else
                {
                    menuItemsMap.Add(new MenuItem
                    {
                        Id = id,
                        Name = name,
                        Parent = parentName,
                        Layout = layout
                    });
                }
            }

            return menuItemsMap;
        }
    }
}