using Shared;
using HDL_ON.UI.CSS;
using System;
using System.Collections.Generic;
using System.Text;

namespace HDL_ON.Stan
{
    /// <summary>
    /// 输入框控件的最初原型(不建议修改和直接使用):标准字体颜色(0xFF798394)，文字向左靠齐,14号字
    /// </summary>
    public class TextInputBase : EditText
    {
        #region ■ 变量声明___________________________

        /// <summary>
        /// 联动底线
        /// </summary>
        private NormalViewControl btnLineTemp = null;
        /// <summary>
        /// 联动底线(光标进来之后,线的颜色会变)
        /// </summary>
        public NormalViewControl btnLine
        {
            set
            {
                this.btnLineTemp = value;
            }
        }
        /// <summary>
        /// 联动外框
        /// </summary>
        private NormalFrameLayout frameBorder = null;
        /// <summary>
        /// 联动外框(光标进来之后,外框的颜色会变)
        /// </summary>
        public NormalFrameLayout FrameBorder
        {
            set
            {
                this.frameBorder = value;
            }
        }

        /// <summary>
        /// 输入结束的事件
        /// </summary>
        public Action FinishInputEvent = null;
        /// <summary>
        /// 值改变事件(受MaxByte属性限制)
        /// </summary>
        public Action<string> TextChangedEvent = null;
        /// <summary>
        /// 指定该输入框是否为不可省略(默认为false)
        /// </summary>
        public bool MustInput = false;

        private int m_MaxByte = -1;
        /// <summary>
        /// 最大输入Byte长度
        /// </summary>
        public int MaxByte
        {
            get { return m_MaxByte; }
            set
            {
                m_MaxByte = value;
                this.TextChangeEventHandler -= this.TxtCode_TextChangedEvent;
                if (m_MaxByte > 0)
                {
                    this.TextChangeEventHandler += this.TxtCode_TextChangedEvent;
                }
            }
        }

        private bool m_UseFocusColor = false;
        /// <summary>
        /// 光标进入文本框时,是否让字体颜色变更(默认不使用)
        /// </summary>
        public bool UseFocusColor
        {
            set
            {
                m_UseFocusColor = value;
                if (m_UseFocusColor == true)
                {
                    //灰色字体
                    this.TextColor = CSS_Color.PromptingColor1;
                }
            }
        }

        #endregion

        #region ■ 初始化_____________________________

        /// <summary>
        /// 输入框控件的最初原型(不建议修改和直接使用):标准字体颜色(0xFF798394)，文字向左靠齐,14号字
        /// </summary>
        public TextInputBase()
        {
            //测试，全体输入框为14号字
            this.TextSize = CSS_FontSize.TextFontSize;

            this.PlaceholderTextColor = CSS_Color.PromptingColor1;
            this.TextColor = CSS_Color.TextualColor;
            this.TextAlignment = TextAlignment.CenterLeft;

            //焦点事件
            this.FoucsChanged += this.TxtCode_FoucsChangedEvent;
            //按下回车键事件
            this.EditorEnterAction += this.EditorEnterEvent;
        }

        /// <summary>
        /// 初始化控件大小(不以平均值进行真实数值计算)
        /// </summary>
        /// <param name="i_Width">宽度</param>
        /// <param name="i_Height">高度</param>
        /// <param name="real">是否计算真实值</param>
        public void InitSize(int i_Width, int i_Height, bool real = true)
        {
            if (real == true)
            {
                i_Width = Application.GetRealWidth(i_Width);
                i_Height = Application.GetRealHeight(i_Height);
            }

            this.Height = i_Height;
            this.Width = i_Width;
        }

        /// <summary>
        /// 初始化控件大小(不以平均值进行真实数值计算)
        /// </summary>
        /// <param name="i_Width">宽度</param>
        /// <param name="real">是否计算真实值</param>
        public void InitSize(int i_Width, bool real = true)
        {
            if (real == true)
            {
                i_Width = Application.GetRealWidth(i_Width);
            }

            this.Height = HdlControlResourse.NormalControlHeight;
            this.Width = i_Width;
        }

        /// <summary>
        /// 初始化控件大小(以平均值进行真实数值计算)
        /// </summary>
        /// <param name="i_Width">宽度</param>
        /// <param name="i_Height">高度</param>
        /// <param name="real">是否计算真实值</param>
        public void InitAvgSize(int i_Width, int i_Height, bool real = true)
        {
            if (real == true)
            {
                i_Width = this.GetPictrueRealSize(i_Width);
                i_Height = this.GetPictrueRealSize(i_Height);
            }

            this.Height = i_Height;
            this.Width = i_Width;
        }

        #endregion

        #region ■ 事件_______________________________

        /// <summary>
        /// 焦点变更事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void TxtCode_FoucsChangedEvent(object sender, FocusEventArgs e)
        {
            if (e.Focus == false)
            {
                if (btnLineTemp != null)
                {
                    btnLineTemp.BackgroundColor = CSS_Color.MainColor;
                }
                if (frameBorder != null)
                {
                    frameBorder.BorderColor = CSS_Color.MainColor;
                }
                if (m_UseFocusColor == true)
                {
                    //灰色字体
                    this.TextColor = CSS_Color.PromptingColor1;
                }
            }
            else
            {
                if (btnLineTemp != null)
                {
                    btnLineTemp.BackgroundColor = CSS_Color.DividingLineColor;
                }
                if (frameBorder != null)
                {
                    frameBorder.BorderColor = CSS_Color.DividingLineColor;
                }
                if (m_UseFocusColor == true)
                {
                    //正常字体
                    this.TextColor = CSS_Color.TextualColor;
                }
            }
        }

        /// <summary>
        /// 输入完成事件
        /// </summary>
        /// <param name="view"></param>
        private void EditorEnterEvent(View view)
        {
            //检测最大输出Byte
            string msg = this.CheckMaxByte();
            if (msg != null)
            {
                HdlMessageLogic.Current.ShowMassage(ShowMsgType.Tip, msg);
                return;
            }
            this.FinishInputEvent?.Invoke();
        }

        /// <summary>
        /// 值改变事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="value"></param>
        private void TxtCode_TextChangedEvent(object sender, string value)
        {
            var byteData = Encoding.UTF8.GetBytes(value);
            var newValue = value;

            //如果输入的值,已经大于指定的byte数,则截取
            if (byteData.Length > this.m_MaxByte)
            {
                //截取指定的byte字节
                newValue = Encoding.UTF8.GetString(byteData, 0, this.m_MaxByte);
                //最后一位不要,因为截取的最后一位可能是乱码
                newValue = newValue.Substring(0, newValue.Length - 1);
                //拼接上它的下一位,然后检测
                var checkValue = newValue + value[newValue.Length];
                if (Encoding.UTF8.GetBytes(checkValue).Length <= this.m_MaxByte)
                {
                    //正好匹配byte数
                    newValue = checkValue;
                }
                this.Text = newValue;
                //将光标至于最后
#if __Android__
                this.SetSelectionEnd();
#endif
            }
            this.TextChangedEvent?.Invoke(newValue);
        }

        #endregion

        #region ■ 检测错误___________________________

        /// <summary>
        /// 检测正确性,存在错误时,返回错误文本,无错误返回null
        /// </summary>
        /// <returns></returns>
        public string CheckError()
        {
            //执行检测错误
            string error = this.DoCheckError();
            if (error != null)
            {
                //焦点控制
                this.Foucs = true;
                return error;
            }
            return null;
        }

        /// <summary>
        /// 执行检测错误
        /// </summary>
        /// <returns></returns>
        private string DoCheckError()
        {
            //检测最大输出Byte
            string msg = this.CheckMaxByte();
            if (msg != null) { return msg; }

            //检测必须输入
            if (this.MustInput == true && this.Text.Trim() == string.Empty)
            {
                if (string.IsNullOrEmpty(this.PlaceholderText) == false)
                {
                    return this.PlaceholderText;
                }
                //该内容不能省略
                return "Please Input Content!";
            }

            return null;
        }

        /// <summary>
        /// 检测最大输入byte
        /// </summary>
        /// <returns></returns>
        private string CheckMaxByte()
        {
            return null;
        }

        #endregion

        #region ■ 一般方法___________________________

        /// <summary>
        /// 计算图片的真实高宽度
        /// </summary>
        /// <param name="i_size"></param>
        /// <returns></returns>
        public int GetPictrueRealSize(int i_size)
        {
            return Application.GetRealWidth(i_size);
        }

        /// <summary>
        /// 控件移除
        /// </summary>
        public override void RemoveFromParent()
        {
            this.FinishInputEvent = null;
            this.TextChangedEvent = null;
            if (this.Parent != null)
            {
                base.RemoveFromParent();
            }
        }

        #endregion
    }
}