using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Security.Cryptography;
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.Navigation;
using System.Windows.Shapes;
using System.Data.SQLite;

namespace CNAS_Authorize
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {

        private MachineAuth m_machines;

        public MainWindow()
        {
            InitializeComponent();

        }

        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            this.LoadData();
        }

        private void LoadData()
        {
            m_machines = new MachineAuth();
            m_machines.Load();
            dataGrid.ItemsSource = m_machines.Page;
            this.DataContext = m_machines;
        }

        private void Window_SizeChanged(object sender, SizeChangedEventArgs e)
        {
            if (this.Width < 500) return;
            dataGrid.Width = this.Width - 48;
            dataGrid.Height = centerPanel.Height;

            //设置列宽
            double colWidth = this.Width - 60;// centerPanel.Width;
            for (int i = 1; i < dataGrid.Columns.Count; i++)
            {
                colWidth = colWidth - dataGrid.Columns[i].Width.Value;
            }
            if (colWidth > 0)
                dataGrid.Columns[0].Width = colWidth;

            edtMachine.Width = this.Width - lbMachine.Width - btnQuery.Width - 48;
            edtFactory.Width = edtMachine.Width;

        }

        private void refreshBind()
        {
            this.DataContext = null;
            this.DataContext = m_machines;
        }

        private void PrevPage_Click(object sender, RoutedEventArgs e)
        {
            bool ok;
            List<Machine> page = m_machines.PrevPage(out ok);
            if (ok)
            {
                dataGrid.ItemsSource = page;
                refreshBind();
            }


        }

        private void NextPage_Click(object sender, RoutedEventArgs e)
        {
            bool ok;
            List<Machine> page = m_machines.NextPage(out ok);
            if (ok)
            {
                dataGrid.ItemsSource = page;
                refreshBind();
            }

        }

        private void Query_Click(object sender, RoutedEventArgs e)
        {
            m_machines.ChangeFilter(edtMachine.Text.Trim(), edtFactory.Text.Trim());
            dataGrid.ItemsSource = m_machines.Page;
            refreshBind();
        }

        private void ConfirmImport_Click(object sender, RoutedEventArgs e)
        {
            string macAddress = edtMachine.Text.Trim();
            string plantCode = edtFactory.Text.Trim();
            
            if (string.IsNullOrEmpty(macAddress) || string.IsNullOrEmpty(plantCode))
            {
                MessageBox.Show("MAC地址和工厂代码不能为空！", "提示");
                return;
            }

            string connectionString = "Data Source=|DataDirectory|\\CNAS.db;Version=3;";
            using (var connection = new SQLiteConnection(connectionString))
            {
                try
                {
                    connection.Open();
                    
                    // 检查是否已存在
                    using (var checkCommand = new SQLiteCommand(connection))
                    {
                        checkCommand.CommandText = "SELECT COUNT(*) FROM macaddress WHERE MAC_ADDRESS = @mac";
                        checkCommand.Parameters.AddWithValue("@mac", macAddress);
                        
                        int count = Convert.ToInt32(checkCommand.ExecuteScalar());
                        if (count > 0)
                        {
                            MessageBox.Show("已经导入!", "提示");
                            return;
                        }
                    }

                    // 插入新记录
                    using (var insertCommand = new SQLiteCommand(connection))
                    {
                        insertCommand.CommandText = @"
                            INSERT INTO macaddress (
                                MAC_ADDRESS,
                                PLANTCODE,
                                CREATETIME,
                                FACILITY_STYLE
                            ) VALUES (
                                @mac,
                                @plant,
                                @time,
                                @style
                            )";

                        insertCommand.Parameters.AddWithValue("@mac", macAddress);
                        insertCommand.Parameters.AddWithValue("@plant", plantCode);
                        insertCommand.Parameters.AddWithValue("@time", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"));
                        insertCommand.Parameters.AddWithValue("@style", "999");

                        insertCommand.ExecuteNonQuery();
                        
                        //AppLog.ServiceInfo("导入成功");
                        MessageBox.Show("导入成功...", "提示");
                        this.LoadData();
                    }
                }
                catch (Exception ex)
                {
                    MessageBox.Show($"导入失败: {ex.Message}", "提示");
                    //AppLog.ServiceError($"导入失败: {ex.Message}");
                }
            }
        }

        private void DownloadActivationCode_Click(object sender, RoutedEventArgs e)
        {
            var button = sender as Button;
            var machine = button.DataContext as Machine;
            if (machine != null)
            {
                try
                {
                    // 生成激活码
                    string activationCode = GenerateActivationCode(machine.MachineCode);

                    // 创建保存文件对话框
                    var saveFileDialog = new Microsoft.Win32.SaveFileDialog
                    {
                        FileName = $"激活码_{machine.MachineCode}_{DateTime.Now:yyyyMMdd}",
                        DefaultExt = ".txt",
                        Filter = "文本文件|*.txt"
                    };

                    if (saveFileDialog.ShowDialog() == true)
                    {
                        // 将激活码写入文件
                        System.IO.File.WriteAllText(saveFileDialog.FileName, activationCode);
                        MessageBox.Show("激活码已成功保存！", "提示", MessageBoxButton.OK, MessageBoxImage.Information);

                        // 更新状态
                        machine.IsGenerated = true;
                        refreshBind();
                    }
                }
                catch (Exception ex)
                {
                    MessageBox.Show($"下载激活码失败: {ex.Message}", "错误", MessageBoxButton.OK, MessageBoxImage.Error);
                }
            }
        }

        private string GenerateActivationCode(string machineCode)
        {
            // 这里实现激活码生成算法
            // 示例：简单的加密算法，实际应用中应该使用更安全的加密方式
            using (var md5 = System.Security.Cryptography.MD5.Create())
            {
                // 加入时间戳使得生成的激活码具有时效性
                string input = machineCode + DateTime.Now.ToString("yyyyMMdd");
                byte[] inputBytes = Encoding.UTF8.GetBytes(input);
                byte[] hashBytes = md5.ComputeHash(inputBytes);

                // 转换为16进制字符串
                StringBuilder sb = new StringBuilder();
                for (int i = 0; i < hashBytes.Length; i++)
                {
                    sb.Append(hashBytes[i].ToString("X2"));
                    // 每4个字符添加一个分隔符，提高可读性
                    if ((i + 1) % 4 == 0 && i != hashBytes.Length - 1)
                    {
                        sb.Append("-");
                    }
                }
                return sb.ToString();
            }
        }
    }
}