using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Windows.Controls;
using System.Windows.Media;
using FWindSoft.Data;
using FWindSoft.SystemExtensions;
using FWindSoft.Wpf.Controls;

namespace FWindSoft.Wpf.History
{
    /// <summary>
    /// 控件数据保存
    /// </summary>
    public class ControlDataManager
    {
        private List<ElementValueProvider> m_ValueProviders;

        public ControlDataManager()
        {
            m_ValueProviders = new List<ElementValueProvider>();
            ValueProviders = new ReadOnlyCollection<ElementValueProvider>(m_ValueProviders);
        }

        public ControlDataManager(List<ElementValueProvider> providers) : this()
        {
            m_ValueProviders.AddRange(providers);
        }

        public ReadOnlyCollection<ElementValueProvider> ValueProviders { get; private set; }

        public void RegistValueProvider(ElementValueProvider provider)
        {
            this.m_ValueProviders.Insert(0, provider);
        }

        #region 静态方法

        /// <summary>
        /// 获取默认的provider
        /// </summary>
        /// <returns></returns>
        public static List<ElementValueProvider> GetDefaultProvider()
        {
            List<ElementValueProvider> providers = new List<ElementValueProvider>();
            providers.Add(new TextBoxValueProvider());
            providers.Add(new CheckBoxValueProvider());
            providers.Add(new ComBoxValueProvider());
            providers.Add(new ListBoxValueProvider());
            providers.Add(new RadioValueProvider());
            return providers;
        }

        #endregion

        private ElementValueProvider GetElementValueProvider(Control control)
        {
            ElementValueProvider provider = HistoryControl.GetValueAdapter(control);
            var controlType = control.GetType();
            //if (provider == null)
            //{
            //    provider = this.ValueProviders.FirstOrDefault(c => c.IsAdapterType(controlType));
            //}
            if (provider == null)
            {
                var objectType = typeof(object);
                for (Type tempType = controlType; tempType != objectType && tempType != null; tempType = tempType.BaseType)
                {
                    provider = this.ValueProviders.FirstOrDefault(c => c.IsAdapterType(tempType));
                    if (provider!=null)
                    {
                        break;
                    }
                }
                //provider = this.ValueProviders.FirstOrDefault(c => controlType.IsBaseType(c.RefControlType));
            }
            if (provider != null)
            {
                provider = provider.Clone();
                provider.SetAdapterControl(control);
            }
            return provider;
        }

        private IValueProvider GetValueProvider(Control control)
        {
            IValueProvider provider = null;
            do
            {
                if (control is IValueProvider)
                {
                    provider = (IValueProvider)control;
                    break;
                }
                provider = GetElementValueProvider(control);
            } while (false);

            return provider;
        }

        #region 公开方法

        /// <summary>
        /// 获取数据
        /// </summary>
        /// <param name="visual"></param>
        public List<ControlSaveItem> GetControlData(Visual visual)
        {
            List<ControlSaveItem> items = new List<ControlSaveItem>();
            for (int i = 0; i < VisualTreeHelper.GetChildrenCount(visual); i++)
            {
                Visual childVisual = (Visual)VisualTreeHelper.GetChild(visual, i);
                if (childVisual != null)
                {
                    Control control = childVisual as Control;
                    if (control != null && HistoryControl.GetIsSave(control) && !string.IsNullOrWhiteSpace(control.Uid))
                    {
                        var provider = GetValueProvider(control);
                        if (provider != null)
                        {
                            var saveItem = new ControlSaveItem();
                            saveItem.ControlId = control.Uid;
                            saveItem.ControlName = control.Name;
                            saveItem.ControlType = control.GetType().Name;
                            saveItem.ControlValue = provider.GetValue().ToString();

                            items.Add(saveItem);
                        }
                        else
                        {
                            items.AddRange(GetControlData(control));
                        }
                    }
                    else
                    {
                        items.AddRange(GetControlData(childVisual));
                    }
                }
            }

            return items;
        }

        /// <summary>
        /// 设置数据
        /// </summary>
        /// <param name="visual"></param>
        /// <param name="datas"></param>
        public void SetControlData(Visual visual, List<ControlSaveItem> datas)
        {
            for (int i = 0; i < VisualTreeHelper.GetChildrenCount(visual); i++)
            {
                Visual childVisual = (Visual)VisualTreeHelper.GetChild(visual, i);
                if (childVisual != null)
                {
                    Control control = childVisual as Control;
                    if (control != null && HistoryControl.GetIsSave(control) && !string.IsNullOrWhiteSpace(control.Uid))
                    {
                        var saveItem = datas.FirstOrDefault(s => s.ControlId == control.Uid);
                        var provider = GetValueProvider(control);
                        if (provider != null && saveItem != null)
                        {
                            provider.SetValue(saveItem.ControlValue);
                        }
                        else
                        {
                            SetControlData(childVisual, datas);
                        }
                    }
                    else
                    {
                        SetControlData(childVisual, datas);
                    }
                }
            }
        }
    }

    #endregion

}