using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Mesnac.Equips;

namespace Mesnac.Action.ChemicalWeighing.Entity
{
    /// <summary>
    /// PLC数据键值类
    /// </summary>
    public class DataKeyValue
    {
        #region 字段定义

        private Value setLastValue = null;
        private Value setNowValue = null;

        #endregion

        #region 构造方法

        public DataKeyValue(string name)
        {
            this.Name = name;
            this.FieldKey = name;
            this.Init();
        }

        #endregion

        #region 属性定义

        /// <summary>
        /// 配置名称 = 配置key值
        /// </summary>
        public string Name { get; private set; }

        /// <summary>
        /// 配置key值
        /// </summary>
        public string FieldKey { get; private set; }

        /// <summary>
        /// 设备设置值
        /// </summary>
        public string EquipKey { get; private set; }

        /// <summary>
        /// 设备设置值
        /// </summary>
        public string EquipRunName { get; private set; }

        /// <summary>
        /// 设备设置值
        /// </summary>
        public Mesnac.Equips.BaseInfo.Data EquipData { get; private set; }

        /// <summary>
        /// 说明
        /// </summary>
        public string Remark { get; private set; }

        /// <summary>
        /// 上一次读取的值
        /// </summary>
        public Value LastValue
        {
            get
            {
                Value value = this.getLastValue();
                if (value == null || value.ToObject() == null)
                {
                    value = this.getNowValue();
                }
                if (value == null || value.ToObject() == null)
                {
                    value = setLastValue;
                }
                if (value == null)
                {
                    value = new Value(null);
                }
                setLastValue = value;
                return setLastValue;
            }
            set
            {
                this.setLastValue = value;
                this.EquipData.Value = value.ToObject();
                this.EquipData.Group.Equip.RefreshEventArgsValue(this.EquipData);
            }
        }

        /// <summary>
        /// 读取当前值
        /// </summary>
        public Value NowValue
        {
            get
            {
                Value value = this.getNowValue();
                if (value == null)
                {
                    value = setNowValue;
                }
                if (value == null)
                {
                    value = setLastValue;
                }
                if (value == null)
                {
                    value = new Value(null);
                }
                setNowValue = value;
                return setNowValue;
            }
            set
            {
                this.setNowValue = value;
                //this.EquipData.Value = value.ToObject();
                //this.EquipData.Group.Equip.RefreshEventArgsValue(this.EquipData);
            }
        }

        #endregion

        #region 方法定义

        /// <summary>
        /// 初始化方法
        /// </summary>
        private void Init()
        {
            foreach (Mesnac.Equips.BaseEquip equip in Factory.Instance.AllEquips.Values)
            {
                foreach (Mesnac.Equips.BaseInfo.Group group in equip.Group.Values)
                {
                    foreach (Mesnac.Equips.BaseInfo.Data data in group.Data.Values)
                    {
                        if (data.RunName.Equals(this.FieldKey, StringComparison.CurrentCultureIgnoreCase))
                        {
                            this.EquipKey = data.KeyName;
                            this.EquipRunName = data.RunName;
                            this.EquipData = data;
                        }
                    }
                }
            }
        }

        /// <summary>
        /// 遍历设备、设备块、设备变量，获取设备变量最后一次读取PLC后的值
        /// </summary>
        /// <returns></returns>
        private Value getLastValue()
        {
            Value Result = null;
            foreach (Mesnac.Equips.BaseEquip equip in Factory.Instance.AllEquips.Values)
            {
                foreach (Mesnac.Equips.BaseInfo.Group group in equip.Group.Values)
                {
                    if (group.Access == System.IO.FileAccess.Read ||
                        group.Access == System.IO.FileAccess.ReadWrite)
                    {
                        foreach (Mesnac.Equips.BaseInfo.Data data in group.Data.Values)
                        {
                            if (data.KeyName == this.EquipKey)
                            {
                                return new Value(data.Value);
                            }
                        }
                    }
                }
            }
            return Result;
        }

        /// <summary>
        /// 遍历设备、设备块、设备变量、获取设备变量当前的值
        /// </summary>
        /// <returns></returns>
        private Value getNowValue()
        {
            Value Result = null;
            foreach (Mesnac.Equips.BaseEquip equip in Factory.Instance.AllEquips.Values)
            {
                foreach (Mesnac.Equips.BaseInfo.Group group in equip.Group.Values)
                {
                    if (group.Access == System.IO.FileAccess.Read ||
                        group.Access == System.IO.FileAccess.ReadWrite)
                    {
                        foreach (Mesnac.Equips.BaseInfo.Data data in group.Data.Values)
                        {
                            if (data.KeyName == this.EquipKey)
                            {
                                return new Value(equip.ReadData(data));
                            }
                        }
                    }
                }
            }
            return Result;
        }

        #endregion
    }
}