using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Runtime.InteropServices;


namespace PTMedicalInsurance.Forms
{
    public partial class PasswordKeyboardForm : Form
    {
        // 导入Windows API函数
        [DllImport("user32.dll")]
        private static extern IntPtr GetForegroundWindow();

        [DllImport("user32.dll")]
        private static extern IntPtr GetFocus();

        [DllImport("user32.dll")]
        private static extern IntPtr SendMessage(IntPtr hWnd, uint Msg, IntPtr wParam, IntPtr lParam);

        private const uint WM_CHAR = 0x0102;

        private IntPtr _targetEditBox;
        public string PassWord = "";
        private int countdownSeconds = 30;

        public PasswordKeyboardForm(IntPtr targetEditBox)
        {
            InitializeComponent();
            _targetEditBox = targetEditBox;
        }

        public PasswordKeyboardForm()
        {
            InitializeComponent();

            // 设置最小和最大大小相同，这样窗体大小就固定了
            this.MinimumSize = new Size(410, 550);
            this.MaximumSize = new Size(410, 550);

            // 方法1：在窗体属性中设置
            //this.StartPosition = FormStartPosition.CenterScreen;
            // 方法2：居中到父窗体
            this.StartPosition = FormStartPosition.CenterParent;

            tb_PassWord.Text = "";

            // 设置Timer属性
            timer1 = new System.Windows.Forms.Timer();
            timer1.Interval = 1000; // 1秒
            timer1.Tick += timer1_Tick;

            // 初始化显示
            UpdateCountdownDisplay();
            StartCountdown();
        }

        private void PasswordKeyboardForm_Load(object sender, EventArgs e)
        {
            this.TopMost = true;
            tb_PassWord.Focus();
        }

        private void SendKeyToFocusedControl(char key)
        {
            IntPtr focusedHandle = GetFocus();
            if (focusedHandle != IntPtr.Zero)
            {
                SendMessage(focusedHandle, WM_CHAR, (IntPtr)key, IntPtr.Zero);
            }
        }

        // 处理按钮点击事件
        private void btn_1_Click(object sender, EventArgs e)
        {
            // 可选：重置倒计时
            ResetCountdown();

            Sunny.UI.UIButton button = sender as Sunny.UI.UIButton;
            if (button != null)
            {
                // 使用 SendKeys 将按钮的文本发送到当前焦点控件
                SendKeys.Send(button.Text);
                tb_PassWord.Text = tb_PassWord.Text + button.Text;
            }

            StartCountdown();
        }       

        // 处理删除按钮点击事件
        private void btn_delete_Click(object sender, EventArgs e)
        {
            // 可选：重置倒计时
            ResetCountdown();
            StartCountdown();

            SendKeys.Send("{BACKSPACE}");

            // 删除最后一个字符
            if (tb_PassWord.Text.Length > 0)
            {
                tb_PassWord.Text = tb_PassWord.Text.Substring(0, tb_PassWord.Text.Length - 1);
            }            
        }

        // 处理关闭按钮点击事件
        private void btn_Exit_Click(object sender, EventArgs e)
        {
            this.Close(); // 关闭密码键盘
        }

        private void btn_OK_Click(object sender, EventArgs e)
        {
            SendTextToEditBox(sender.ToString());
            PassWord = tb_PassWord.Text;

            DialogResult = DialogResult.OK;
        }

        // 将文本发送到目标编辑框
        private void SendTextToEditBox(string text)
        {
            if (_targetEditBox != IntPtr.Zero)
            {
                foreach (char c in text)
                {
                    SendMessage(_targetEditBox, WM_CHAR, (IntPtr)c, IntPtr.Zero);
                }
            }
        }

        private void btn_clear_Click(object sender, EventArgs e)
        {
            // 可选：重置倒计时
            ResetCountdown();
            StartCountdown();
            SendKeys.Send("^{A}"); // 全选
            SendKeys.Send("{DEL}"); // 删除
            tb_PassWord.Text = "";            
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            countdownSeconds--;      
            UpdateCountdownDisplay();

            if (countdownSeconds <= 0)
            {
                timer1.Stop();
                this.Close();
            }
        }

        private void UpdateCountdownDisplay()
        {
            uiTitlePanel1.Text = "请输入社保卡密码"+ $" {countdownSeconds}秒后关闭";
        }

        private void StartCountdown()
        {
            countdownSeconds = 30;
            UpdateCountdownDisplay();
            timer1.Start();
        }

        private void ResetCountdown()
        {
            countdownSeconds = 30;
            UpdateCountdownDisplay();
            timer1.Stop();
        }
    }
}