using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Windows.Input;
using System.Windows.Media;
using AIStudio.Wpf.DiagramDesigner.Models;
using Newtonsoft.Json;

namespace AIStudio.Wpf.DiagramDesigner
{

    public interface ISelectItems
    {
        SimpleCommand SelectItemCommand
        {
            get;
        }
    }


    public abstract class SelectableDesignerItemViewModelBase : SelectableViewModelBase, ISelectItems, ISelectable, IGroupable
    {
        public SelectableDesignerItemViewModelBase() : this(null)
        {

        }

        public SelectableDesignerItemViewModelBase(IDiagramViewModel root) :base(root)
        {
       
        }

        public SelectableDesignerItemViewModelBase(IDiagramViewModel root, SelectableItemBase designer):base(root, designer)
        {
           
        }

        public SelectableDesignerItemViewModelBase(IDiagramViewModel root, SerializableItem serializableItem, string serializableType) : base(root, serializableItem, serializableType)
        {

        }

        protected override void Init(IDiagramViewModel root)
        {
            base.Init(root);

            SelectItemCommand = new SimpleCommand(Command_Enable, ExecuteSelectItemCommand);
            EditCommand = new SimpleCommand(Command_Enable, ExecuteEditCommand);
        }

        protected override void LoadDesignerItemViewModel(SelectableItemBase designerbase)
        {
            base.LoadDesignerItemViewModel(designerbase);
        }

        public virtual bool InitData()
        {
            return true;
        }
        public virtual bool EditData()
        {
            return true;
        }

        public SimpleCommand SelectItemCommand
        {
            get; private set;
        }
        public ICommand EditCommand
        {
            get; private set;
        }

        private bool _isSelected;
        [Browsable(false)]
        public override bool IsSelected
        {
            get
            {
                return _isSelected;
            }
            set
            {
                if (SetProperty(ref _isSelected, value))
                {
                    //如果没有文字，失去焦点自动清除
                    if (_isSelected == false && string.IsNullOrEmpty(Text))
                    {
                        ShowText = false;
                    }
                }

            }
        }

        private string _text;
        [Browsable(true)]
        [CanDo]
        public override string Text
        {
            get
            {
                var text = _text;
                if (FontViewModel.FontCase == FontCase.Upper)
                {
                    return text?.ToUpper();
                }
                else if (FontViewModel.FontCase == FontCase.Lower)
                {
                    return text?.ToLower();
                }
                else
                {
                    return text;
                }
            }
            set
            {
                if (SetProperty(ref _text, value))
                {
                    if (!string.IsNullOrEmpty(_text))
                    {
                        ShowText = true;
                    }
                }
            }
        }

        private bool _isReadOnlyText = false;
        public bool IsReadOnlyText
        {
            get
            {
                if (IsReadOnly)
                    return true;
                return _isReadOnlyText;
            }
            set
            {
                SetProperty(ref _isReadOnlyText, value);
            }
        }

        private bool _showText;
        public virtual bool ShowText
        {
            get
            {
                return _showText;
            }
            set
            {
                SetProperty(ref _showText, value);
            }
        }

        private void ExecuteSelectItemCommand(object param)
        {
            SelectItem((bool)param, !IsSelected);
        }

        private void SelectItem(bool newselect, bool select)
        {
            if (newselect)
            {
                foreach (var designerItemViewModelBase in Root.SelectedItems.ToList())
                {
                    designerItemViewModelBase._isSelected = false;
                }
            }

            IsSelected = select;
        }

        public override void AddToSelection(bool selected)
        {
            foreach (SelectableDesignerItemViewModelBase item in Root.SelectedItems.ToList())
                item.IsSelected = false;

            Root.SelectedItems.Clear();
            if (selected == true)
            {
                Root.SelectionService.AddToSelection(this);
            }
        }

        protected virtual void ExecuteEditCommand(object param)
        {
            if (IsReadOnly == true) return;

            ShowText = true;
        }
    }
}