/*-------------------------------------------------------------------------
 * 功能描述：ParameterDefinition
 * 作者：xulisong
 * 创建时间： 2019/3/7 9:34:07
 * 版本号：v1.0
 *  -------------------------------------------------------------------------*/

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Autodesk.Revit.DB;

namespace FWindSoft.Revit
{
    /// <summary>
    /// 参数定义
    /// </summary>
    public class ParameterDefinition
    {
        private DefinitionType m_DefinitionType;
        #region 内部标志

        private enum DefinitionType
        {
            Name,
            BuiltIn,
            Guid,
        }
        #endregion
        #region 封装输入参数
        /*
         * 将多种参数查询统一形式
         */
        #endregion
        public ParameterDefinition(string parameterName)
        {
            m_DefinitionType = DefinitionType.Name;
            Name = parameterName;
        }
        public ParameterDefinition(BuiltInParameter builtInParameter)
        {
            m_DefinitionType = DefinitionType.BuiltIn;
            BuiltInParameter = builtInParameter;
        }
        public ParameterDefinition(Guid guid)
        {
            m_DefinitionType = DefinitionType.Guid;
            Guid = guid;
        }
        /// <summary>
        /// 参数名称
        /// </summary>
        public string Name { get; private set; }
        /// <summary>
        /// 参数类别
        /// </summary>
        public BuiltInParameter BuiltInParameter
        {
            get; private set;
        }

        /// <summary>
        /// 参数唯一值
        /// </summary>
        public Guid Guid { get; private set; }
        /// <summary>
        /// 修改检测[ture是]
        /// </summary>
        public Func<Element, string, bool> CanUpdate { get; set; }
        /// <summary>
        /// 获取指定元素的参数
        /// </summary>
        /// <param name="element"></param>
        /// <returns></returns>
        public Parameter LookupParameter(Element element)
        {
            Parameter parameter = null;
            switch (m_DefinitionType)
            {
                case DefinitionType.Name:
                {
                    parameter= element.LookupParameter(Name);
                        break;
                }
                case DefinitionType.Guid:
                {
                    parameter = element.get_Parameter(Guid); 
                    break;
                }
                case DefinitionType.BuiltIn:
                {
                    parameter = element.get_Parameter(BuiltInParameter); 
                        break;
                }
            }
            return parameter;
        }

        /// <summary>
        /// 这顶指定元素的值
        /// </summary>
        /// <param name="element"></param>
        /// <param name="value"></param>
        public bool SetParameter(Element element, string value)
        {
            bool result = false;
            var parameter = LookupParameter(element);
            if (parameter == null)
                return result;
            if (CanUpdate != null && !CanUpdate(element, value))
                return result;
           return ParameterUtil.SetValue(parameter, value);
        }
        /// <summary>
        /// 设置元素值，检查如果新值与就值相同，则不进行更新
        /// </summary>
        /// <param name="element"></param>
        /// <param name="value"></param>
        public bool SetParameterWithCheck(Element element, string value)
        {
            bool result = false;
            var parameter = LookupParameter(element);
            if (parameter == null)
                return result;
            var oldValue = ParameterUtil.GetValue(parameter);
            if (oldValue == value)
                return result;
            if (CanUpdate != null && !CanUpdate(element, value))
                return result;
           return  ParameterUtil.SetValue(parameter, value);
        }
    }
}