using System;
using System.ComponentModel;
using System.Drawing;
using System.Web.UI;
using System.Web.UI.WebControls;
using NewLife.Configuration;
using NewLife.Web;

namespace XControl
{
    /// <summary>泛型扩展控件基类，泛型指定目标控件类型</summary>
    /// <typeparam name="TTargetControl"></typeparam>
    public abstract class ExtenderControl<TTargetControl> : Control where TTargetControl : Control
    {
        #region 属性
        private String _TargetControlID;
        /// <summary>目标控件ID</summary>
        [IDReferenceProperty(typeof(Control))]
        [WebCategory("Behavior")]
        [Description("目标控件ID")]
        public String TargetControlID
        {
            get { return _TargetControlID; }
            set { _TargetControlID = value; }
        }

        /// <summary>是否启用</summary>
        [Description("是否启用")]
        [DefaultValue(true)]
        public Boolean Enabled
        {
            get { return GetPropertyValue<Boolean>("Enabled", true); }
            set { SetPropertyValue<Boolean>("Enabled", value); }
        }

        /// <summary>是否自动附属该类型的目标控件</summary>
        [Description("是否自动附属该类型的目标控件")]
        [DefaultValue(true)]
        public Boolean AutoAttach
        {
            get { return GetPropertyValue<Boolean>("AutoAttach", true); }
            set { SetPropertyValue<Boolean>("AutoAttach", value); }
        }
        #endregion

        #region 扩展属性
        /// <summary>目标控件</summary>
        public TTargetControl TargetControl
        {
            get { return FindTargetControl(); }
            //set { _TargetControl = value; }
        }

        /// <summary>已重载。用于隐藏Visible属性</summary>
        [EditorBrowsable(EditorBrowsableState.Never), Browsable(false), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
        public override bool Visible
        {
            get { return base.Visible; }
            set { throw new NotImplementedException(); }
        }
        #endregion

        #region 方法
        /// <summary>根据ID查找控件</summary>
        /// <param name="id"></param>
        /// <returns></returns>
        public override Control FindControl(string id)
        {
            Control control = base.FindControl(id);
            if (control != null) return control;

            // 处理容器
            for (Control container = NamingContainer; container != null; container = container.NamingContainer)
            {
                control = container.FindControl(id);
                if (control != null) return control;
            }

            return null;
        }

        /// <summary>查找目标控件</summary>
        /// <returns></returns>
        public virtual TTargetControl FindTargetControl()
        {
            if (String.IsNullOrEmpty(TargetControlID))
                return ControlHelper.FindControl<TTargetControl>(Page, null);
            else
                return FindControl(TargetControlID) as TTargetControl;
        }
        #endregion

        #region PropertySupportMethods
        //[SuppressMessage("Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly", MessageId = "V", Justification = "V stands for value")]
        //[SuppressMessage("Microsoft.Naming", "CA1715:IdentifiersShouldHaveCorrectPrefix", MessageId = "T", Justification = "V stands for value")]
        /// <summary>获取属性值</summary>
        /// <typeparam name="V"></typeparam>
        /// <param name="propertyName"></param>
        /// <param name="nullValue"></param>
        /// <returns></returns>
        protected V GetPropertyValue<V>(string propertyName, V nullValue)
        {
            if (ViewState[propertyName] == null)
            {
                //+ 控件状态没有设置时，使用配置文件的全局设置
                String name = this.GetType().FullName + "." + propertyName;
                if (typeof(V) == typeof(String) ||
                    typeof(V) == typeof(Int32) ||
                    typeof(V) == typeof(Boolean))
                    return Config.GetConfig<V>(name, nullValue);

                if (typeof(V) == typeof(Color))
                {
                    String str = Config.GetConfig<String>(name, null);
                    if (!String.IsNullOrEmpty(str))
                    {
                        TypeConverter convert = new WebColorConverter();
                        try
                        {
                            return (V)convert.ConvertFromString(str);
                        }
                        catch { }
                    }
                }

                return nullValue;
            }
            return (V)ViewState[propertyName];
        }

        //[SuppressMessage("Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly", MessageId = "V", Justification = "V stands for value")]
        //[SuppressMessage("Microsoft.Naming", "CA1715:IdentifiersShouldHaveCorrectPrefix", MessageId = "T", Justification = "V stands for value")]
        /// <summary>设置属性值</summary>
        /// <typeparam name="V"></typeparam>
        /// <param name="propertyName"></param>
        /// <param name="value">数值</param>
        protected void SetPropertyValue<V>(string propertyName, V value)
        {
            ViewState[propertyName] = value;
        }
        #endregion

        #region 更新目标设计时
        /// <summary>更新目标设计时</summary>
        public void UpdateTargetDesignTimeHtml()
        {
            TTargetControl tc = TargetControl;
            if (tc != null) ExtenderControlDesigner.UpdateTargetDesignTimeHtml(tc);
        }
        #endregion
    }
}