using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
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.Shapes;

namespace DyeingComputer.KEY
{
    /// <summary>
    /// TouchKeyboard.xaml 的交互逻辑
    /// </summary>
    public partial class TouchKeyboardNumeral : Window
    {
        private bool mode = false;
        public string KeyValue;
        public event EventHandler<KeyPressedEventArgs> KeyPressed;
        private KeyboardMode currentMode = KeyboardMode.Default;
        private int minValue = 0;
        private int maxValue = 9;
        private TextBox targetTextBox;
        // 定义键盘模式枚举
        public enum KeyboardMode
        {
            Default,        // 默认模式，所有键可用
            NumericOnly,    // 只允许数字
            DecimalOnly,    // 允许数字和小数点
            LimitedRange    // 限制数字范围
        }

        public TouchKeyboardNumeral()
        {
            InitializeComponent();
        }
        public void SetKeyboardMode(KeyboardMode mode, TextBox target = null, int min = 0, int max = 9)
        {
            currentMode = mode;
            targetTextBox = target;
            minValue = min;
            maxValue = max;

            UpdateKeyboardLayout();
        }
        private void UpdateKeyboardLayout()
        {
            switch (currentMode)
            {
                case KeyboardMode.NumericOnly:
                    // 只允许数字，禁用小数点
                    SetButtonEnabled(".", false);
                    break;

                case KeyboardMode.DecimalOnly:
                    // 允许数字和小数点
                    SetButtonEnabled(".", true);
                    break;

                case KeyboardMode.LimitedRange:
                    // 根据范围启用/禁用数字键
                    for (int i = 0; i <= 9; i++)
                    {
                        SetButtonEnabled(i.ToString(), i >= minValue && i <= maxValue);
                    }
                    mode = true;
                    break;

                case KeyboardMode.Default:
                default:
                    // 启用所有键
                    foreach (var element in FirstRow.Children)
                    {
                        if (element is Button button && char.IsDigit(button.Content.ToString()[0]))
                            button.IsEnabled = true;
                    }
                    foreach (var element in SecondRow.Children)
                    {
                        if (element is Button button && (char.IsDigit(button.Content.ToString()[0]) || button.Content.ToString() == "."))
                            button.IsEnabled = true;
                    }
                    foreach (var element in ThirdRow.Children)
                    {
                        if (element is Button button && char.IsDigit(button.Content.ToString()[0]))
                            button.IsEnabled = true;
                    }
                    break;
            }
        }

        // 设置按钮启用状态
        private void SetButtonEnabled(string content, bool enabled)
        {
            // 在第一行查找
            foreach (var element in FirstRow.Children)
            {
                if (element is Button button && button.Content.ToString() == content)
                {
                    button.IsEnabled = enabled;
                    return;
                }
            }

            // 在第二行查找
            foreach (var element in SecondRow.Children)
            {
                if (element is Button button && button.Content.ToString() == content)
                {
                    button.IsEnabled = enabled;
                    return;
                }
            }

            // 在第三行查找
            foreach (var element in ThirdRow.Children)
            {
                if (element is Button button && button.Content.ToString() == content)
                {
                    button.IsEnabled = enabled;
                    return;
                }
            }
        }

        // 数字键点击事件
        private void KeyButton_Click(object sender, RoutedEventArgs e)
        {
            if (mode && PreviewTextBox.Text.Length > 0) return;
            Button button = sender as Button;
            if (button != null && button.IsEnabled)
            {
                string keyValue = button.Content.ToString();
                PreviewTextBox.Text += keyValue;

                // 触发按键事件
                //   KeyPressed?.Invoke(this, new KeyPressedEventArgs(KeyType.Character, keyValue));
            }
        }

        // 退格键点击事件
        private void Backspace_Click(object sender, RoutedEventArgs e)
        {               
            if (PreviewTextBox.Text.Length > 0)
            {
                PreviewTextBox.Text = PreviewTextBox.Text.Substring(0, PreviewTextBox.Text.Length - 1);

                // 触发退格事件
              //  KeyPressed?.Invoke(this, new KeyPressedEventArgs(KeyType.Backspace, ""));
            }
        }

        // 回车键点击事件
        private void Enter_Click(object sender, RoutedEventArgs e)
        {            
            // 触发回车事件
            KeyPressed?.Invoke(this, new KeyPressedEventArgs(KeyType.Enter, PreviewTextBox.Text));

            // 隐藏键盘
            this.Hide();
        }

        // 隐藏键点击事件
        private void Hide_Click(object sender, RoutedEventArgs e)
        {
            KeyPressed?.Invoke(this, new KeyPressedEventArgs(KeyType.Hide, ""));
            // 隐藏键盘
            this.Hide();
        }

        public class KeyPressedEventArgs : EventArgs
        {
            public KeyType KeyType { get; }
            public string KeyValue { get; }

            public KeyPressedEventArgs(KeyType keyType, string keyValue)
            {
                KeyType = keyType;
                KeyValue = keyValue;
            }
        }
        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            // 初始化为默认模式
         //   SetKeyboardMode(KeyboardMode.Default);
            PreviewTextBox.Text = null;
            mode = false;
        }       
    }
    // 按键类型枚举
    public enum KeyType
    {
        Character,
        Backspace,
        Enter,
        Hide
    }

    // 按键事件参数
    public class KeyPressedEventArgs : EventArgs
    {
        public KeyType KeyType { get; }
        public string KeyValue { get; }

        public KeyPressedEventArgs(KeyType keyType, string keyValue)
        {
            KeyType = keyType;
            KeyValue = keyValue;
        }
    }
}