using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using AIStudio.Wpf.DiagramDesigner.Geometrys;

namespace AIStudio.Wpf.DiagramDesigner
{
    public class BlockDesignerItemTempLink
    {
        public List<BlockDesignerItemViewModel> Items
        {
            get; set;
        } = new List<BlockDesignerItemViewModel>();

        public RectangleBase GetBounds(bool includePorts = false)
        {
            return Items.FirstOrDefault().GetBounds();
        }

        public List<FullyCreatedConnectorInfo> Connectors
        {
            get
            {
                List<FullyCreatedConnectorInfo> connectors = new List<FullyCreatedConnectorInfo>();
                if (Items.FirstOrDefault().TopConnector != null)
                {
                    connectors.Add(Items.FirstOrDefault().TopConnector);
                }
                if (Items.FirstOrDefault().LeftConnector != null)
                {
                    connectors.Add(Items.FirstOrDefault().LeftConnector);
                }
                if (Items.LastOrDefault().BottomConnector != null)
                {
                    connectors.Add(Items.LastOrDefault().BottomConnector);
                }
                if (Items.LastOrDefault().RightConnector != null)
                {
                    connectors.Add(Items.LastOrDefault().RightConnector);
                }
                return connectors;
            }
        }

        public static List<BlockDesignerItemTempLink> Build(List<BlockDesignerItemViewModel> blocks)
        {
            List<BlockDesignerItemTempLink> links = new List<BlockDesignerItemTempLink>();
            foreach (var block in blocks.OrderBy(p => p.BlockLevel).ToList())
            {
                bool success = false;
                foreach (var link in links)
                {
                    if (link.Items.LastOrDefault() == block.Prev)
                    {
                        link.Items.Add(block);
                        success = true;
                    }
                }
                if (success == false)
                {
                    BlockDesignerItemTempLink link = new BlockDesignerItemTempLink();
                    link.Items.Add(block);
                    links.Add(link);
                }
            }
            return links;
        }
    }
}