using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace MECF.Framework.UI.Core.Control
{
    /// <summary>
    /// NumbericUpDown.xaml 的交互逻辑
    /// </summary>
    public partial class NumbericUpDown : UserControl
    {
        /// <summary>
        /// 是否设置上下限
        /// </summary>
        private bool _isSetRange = false;

        #region 属性
        public static readonly DependencyProperty ValueProperty = DependencyProperty.Register(
            "Value", typeof(double), typeof(NumbericUpDown), new FrameworkPropertyMetadata(0.00, FrameworkPropertyMetadataOptions.AffectsRender));
        /// <summary>
        /// 数值
        /// </summary>
        public double Value
        {
            get
            {
                return (double)this.GetValue(ValueProperty);
            }
            set
            {
                this.SetValue(ValueProperty, value);
            }
        }

        public static readonly DependencyProperty MaxValueProperty = DependencyProperty.Register(
           "MaxValue", typeof(double), typeof(NumbericUpDown), new FrameworkPropertyMetadata(0.00, FrameworkPropertyMetadataOptions.AffectsRender));
        /// <summary>
        /// 最大值
        /// </summary>
        public double MaxValue
        {
            get
            {
                return (double)this.GetValue(MaxValueProperty);
            }
            set
            {
                _isSetRange = true;
                this.SetValue(MaxValueProperty, value);
            }
        }
        public static readonly DependencyProperty MinValueProperty = DependencyProperty.Register(
           "MinValue", typeof(double), typeof(NumbericUpDown), new FrameworkPropertyMetadata(0.00, FrameworkPropertyMetadataOptions.AffectsRender));
        /// <summary>
        /// 最小值
        /// </summary>
        public double MinValue
        {
            get
            {
                return (double)this.GetValue(MinValueProperty);
            }
            set
            {
                _isSetRange = true;
                this.SetValue(MinValueProperty, value);
            }
        }

        public static readonly DependencyProperty IncrementValueProperty = DependencyProperty.Register(
           "IncrementValue", typeof(double), typeof(NumbericUpDown), new FrameworkPropertyMetadata(0.01, FrameworkPropertyMetadataOptions.AffectsRender));
        /// <summary>
        /// 步进
        /// </summary>
        public double IncrementValue
        {
            get
            {
                return (double)this.GetValue(IncrementValueProperty);
            }
            set
            {
                this.SetValue(IncrementValueProperty, value);
            }
        }

        public static readonly DependencyProperty DigitalMaxLengthProperty = DependencyProperty.Register(
           "DigitalMaxLength", typeof(double), typeof(NumbericUpDown), new FrameworkPropertyMetadata(0.00, FrameworkPropertyMetadataOptions.AffectsRender));
        /// <summary>
        /// 小数最大长度
        /// </summary>
        public double DigitalMaxLength
        {
            get
            {
                return (double)this.GetValue(DigitalMaxLengthProperty);
            }
            set
            {
                this.SetValue(DigitalMaxLengthProperty, value);
            }
        }
        #endregion

        /// <summary>
        /// 构造函数
        /// </summary>
        public NumbericUpDown()
        {
            InitializeComponent();
        }

        private void OnPreviewTextInput(object sender, TextCompositionEventArgs e)
        {
            e.Handled = !IsTextAllowed(e.Text, ((TextBox)sender).Text);
        }

        private bool IsTextAllowed(string key, string text)
        {
            Regex regex = new Regex("[^0-9.-]+"); //regex that matches disallowed text
            return !regex.IsMatch(key);
        }
        /// <summary>
        /// 增加
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void Up_Click(object sender, RoutedEventArgs e)
        {
            double tmp = Value + IncrementValue;
            if (_isSetRange)
            {
                if (tmp <= MaxValue)
                {
                    Value = tmp;
                }
                else
                {
                    Value = MaxValue;
                }
            }
            else
            {
                Value = tmp;
            }
        }
        /// <summary>
        /// 减少
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void Down_Click(object sender, RoutedEventArgs e)
        {
            double tmp = Value - IncrementValue;
            if (_isSetRange)
            {
                if (tmp >= MinValue)
                {
                    Value = tmp;
                }
                else
                {
                    Value = MinValue;
                }
            }
            else
            {
                Value = tmp;
            }
        }


        private void TextBox_TextChanged(object sender, TextChangedEventArgs e)
        {
            double.TryParse(txtInput.Text, out var tmp);
            tmp = Math.Round(tmp, 2);
            if(tmp>MaxValue&&_isSetRange)
            {
                txtInput.Text = MaxValue.ToString();
                Value = MaxValue;
            }
            else if(tmp<MinValue&&_isSetRange)
            {
                txtInput.Text = MinValue.ToString();
                Value = MinValue;
            }
        }
    }
}