using Plane.Copters;
using GalaSoft.MvvmLight;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Plane.FormationCreator.Formation
{

    public class CopterCollection : ObservableCollection<ICopter>
    {
        /// <summary>  
        /// 实现排序插入  
        /// </summary>  
        /// <param name="baseSemObjects"></param>  
        public int AddCopter(ICopter entityObject)
        {
            int _index = 0;
            if (this.Count == 0)
            {
                Add(entityObject);
                _index = 0;
            }
            else
            {
                bool isInsret = false;
                for (int i = 0; i < this.Count; i++)
                {
                    if (String.Compare(this[i].Name, entityObject.Name, false) >= 0)
                    {
                        InsertItem(i, entityObject);
                        isInsret = true;
                        _index= i;
                        break;
                        
                    }
                }
                if (!isInsret)
                {
                    Add(entityObject);
                    _index = this.Count()-1 ;
                }
            }
            return _index;
        }
    }


    public class CopterManager : ObservableObject
    {
        public CopterManager()
        {
            AppEx.Current.AppModeChanged += (sender, e) =>
            {
                RaisePropertyChanged(nameof(Copters));
            };
            App.Current.Exit += (sender, e) =>
            {
                Task.WhenAll(Copters.Select(c => c.DisconnectAsync()));
            };
        }


        public CopterCollection Copters { get;} = new CopterCollection();

        public ArrayList CopterStatus = new ArrayList();
        //public ObservableCollection<ICopter> Copters
        //{
        //    get
        //    {
        //        switch (AppEx.Instance.CurrentMode)
        //        {
        //            case AppMode.ControllingCopters:
        //            default:
        //                return CoptersForControlling;
        //            case AppMode.PreparedForRunningTasks:
        //            case AppMode.ModifyingTask:
        //                return CoptersForModifyingTask;
        //            case AppMode.RunningTasks:
        //                throw new NotImplementedException();
        //        }
        //    }
        //}


        public IEnumerable<ICopter> SelectedCopters { get { return _selectedCoptersGetter().Cast<ICopter>(); } }

        /// <summary>
        /// 注意：为避免多线程操作出问题，每次使用此属性时都会新建一个 List！
        /// </summary>
        public IEnumerable<ICopter> AcceptingControlCopters { get { return SelectedCopters.ToList(); } }

        private Func<IList> _selectedCoptersGetter;

        private Action<ICopter> _selectCopterAction;

        public void SetSelectionDelegates(Func<IList> selectedCoptersGetter, Action<ICopter> selectCopterAction)
        {
            _selectedCoptersGetter = selectedCoptersGetter;
            _selectCopterAction = selectCopterAction;
        }

        public event EventHandler<SelectedCoptersChangedEventArgs> SelectedCoptersChanged;

        public void RaiseSelectedCoptersChanged(IEnumerable<ICopter> addedCopters, IEnumerable<ICopter> removedCopters)
        {
            SelectedCoptersChanged?.Invoke(this, new SelectedCoptersChangedEventArgs { AddedCopters = addedCopters, RemovedCopters = removedCopters });
        }

        public void Select(ICopter copter)
        {
            _selectCopterAction(copter);
        }
    }

    public class SelectedCoptersChangedEventArgs : EventArgs
    {
        public IEnumerable<ICopter> AddedCopters { get; set; }
        public IEnumerable<ICopter> RemovedCopters { get; set; }
    }
}