using Org.BouncyCastle.Asn1.Crmf;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using static System.Net.Mime.MediaTypeNames;
using System.Windows.Forms;
using System.Drawing;

namespace PTMedicalInsurance.Helper
{
    [DesignerCategory("Code")]
    public class ProgressDialog : Form
    {
        private ProgressBar _progressBar;
        private Label _labelStatus;
        private Button _cancelButton;

        private BackgroundWorker _backgroundWorker;
        private int _maximum = 100;
        private string _header = "正在查询...";


        public string HeaderText
        {
            get => _header;
            set { Text = _header = value; }
        }

        public ProgressBarStyle PBStyle
        {
            get => _progressBar.Style;
            set => _progressBar.Style = value;
        }

        public int MQSpeed
        {
            get => _progressBar.MarqueeAnimationSpeed;
            set => _progressBar.MarqueeAnimationSpeed = value;
        }

        public ProgressDialog()
        {
            InitComponent();
        }

        public ProgressDialog(BackgroundWorker backgroundWorker) : this()
        {
            _backgroundWorker = backgroundWorker;
        }

        public void InitComponent()
        {
            System.Windows.Forms.Application.EnableVisualStyles();

            // 设置窗体样式
            Text = _header;
            StartPosition = FormStartPosition.CenterParent;
            FormBorderStyle = FormBorderStyle.FixedDialog;
            MaximizeBox = false;
            MinimizeBox = false;
            ShowInTaskbar = false;
            TopMost = true;
            ClientSize = new Size(800, 100);
            CenterToScreen();

            // 初始化进度条
            _progressBar = new ProgressBar
            {
                Location = new Point(12, 12),
                Size = new Size(700, 23),
                Style = ProgressBarStyle.Marquee,
                MarqueeAnimationSpeed = 50
            };
            Controls.Add(_progressBar);

            // 状态标签
            _labelStatus = new Label
            {
                Location = new Point(12, 41),
                Size = new Size(360, 23)
            };
            Controls.Add(_labelStatus);

            // 取消按钮
            _cancelButton = new Button
            {
                Text = "取消",
                Location = new Point(520, 60),
                Size = new Size(75, 23)
            };
            _cancelButton.Click += CancelButton_Click;
            Controls.Add(_cancelButton);

            SetStyle(ControlStyles.ResizeRedraw, true);
        }

        public int ProgressValue
        {
            set
            {
                if (this.IsHandleCreated)
                {
                    this.InvokeIfRequired(() =>
                    {
                        _progressBar.Value = value;
                        _labelStatus.Text = $"已完成 {value}/{_maximum}";

                        if (value == _maximum || value >= _progressBar.Maximum)
                        {
                            _progressBar.Refresh();
                            _labelStatus.Refresh();
                        }
                    });
                }
            }
        }

        public void SetProgress(int max)
        {
            _maximum = max;
            _progressBar.Maximum = max;
        }

        public string StatusText
        {
            set => this.InvokeIfRequired(() => _labelStatus.Text = value);
        }

        private void CancelButton_Click(object sender, EventArgs e)
        {
            if (_backgroundWorker != null && _backgroundWorker.WorkerSupportsCancellation)
            {
                _backgroundWorker.CancelAsync();
            }

            this.Close();
        }

        public async void ShowAsync()
        {
            await Task.Run(() =>
            {
                System.Windows.Forms.Application.Run(this);
            });
        }

        protected override void OnClosed(EventArgs e)
        {
            base.OnClosed(e);
            _backgroundWorker = null;
        }
    }

    public static class ControlExtensions
    {
        public static void InvokeIfRequired(this Control control, MethodInvoker action)
        {
            if (control.InvokeRequired)
            {
                try
                {
                    control.Invoke(action);
                }
                catch (Exception ex) when (ex is InvalidOperationException || ex is InvalidAsynchronousStateException)
                {
                    // 忽略无效句柄操作
                    Console.WriteLine("无法执行 Invoke：" + ex.Message);
                }
            }
            else
            {
                action();
            }
        }
    }

    public class DataLoaderContext
    {
        //
        public object[] args { get; set; } //入参
        // 回调函数（替代委托参数）
        public delegate void ProgressCallback(int progress);
        public delegate void ProgressMaxCallback(int max);
        public ProgressCallback reportProgress { get; set; }
        public delegate void SetProgressMaximum(int max);  // 最大值

        public ProgressMaxCallback setProgressMaximum { get; set; }

        public delegate void SetProgressHeaderText(ProgressBarStyle progressBarStyle, string content, int speed);
        public SetProgressHeaderText setProgressHeaderText { get; set; }
        public Action<int, string> OnCompleted { get; set; }    // 完成回调（可选）

        // 取消支持
        public BackgroundWorker Worker { get; set; }            // 用于取消检查
    }
    class ProgressWrapper
    {
        private readonly BackgroundWorker _backgroundWorker;
        private ProgressDialog _progressDialog;
        private readonly Form _ownerForm;
        public delegate int MyFunc<T>(DataLoaderContext context, out T err);

        private readonly MyFunc<string> _delegateFunc;

        private Action<int, string> _onCompleted;
        private bool _disposed = false;



        public delegate void ProgressCallback(int progress);
        public delegate void ProgressMaxCallback(int max);

        public ProgressWrapper(MyFunc<string> func, Form ownerForm)
        {
            _delegateFunc = func ?? throw new ArgumentNullException(nameof(func));
            _ownerForm = ownerForm;

            _backgroundWorker = new BackgroundWorker
            {
                WorkerReportsProgress = true,
                WorkerSupportsCancellation = true
            };
            _backgroundWorker.DoWork += BackgroundWorker_DoWork;
            _backgroundWorker.ProgressChanged += BackgroundWorker_ProgressChanged;
            _backgroundWorker.RunWorkerCompleted += BackgroundWorker_RunWorkerCompleted;
        }

        public void SetProgressBar(ProgressBarStyle style, string headerText, int mqSpeed)
        {
            if (_progressDialog == null || _progressDialog.IsDisposed)
            {
                _progressDialog = new ProgressDialog(_backgroundWorker)
                {
                    PBStyle = style,
                    HeaderText = headerText,
                    MQSpeed = mqSpeed
                };
            }
            else
            {
                if (mqSpeed < 0) mqSpeed = 50;
                _progressDialog.PBStyle = style;
                _progressDialog.HeaderText = headerText;
                _progressDialog.MQSpeed = mqSpeed;
            }
        }

        public void Start(object[] args, Action<int, string> onCompleted)
        {
            if (_backgroundWorker.IsBusy) return;

            _onCompleted = onCompleted;

            if (_ownerForm == null || _ownerForm.IsDisposed)
            {
                _progressDialog?.Show();
            }
            else
            {
                _progressDialog?.Show(_ownerForm);
            }

            _backgroundWorker.RunWorkerAsync(args);
        }

        private void BackgroundWorker_DoWork(object sender, DoWorkEventArgs e)
        {
            var worker = sender as BackgroundWorker;
            if (worker == null)
            {
                e.Result = Tuple.Create(-1, "BackgroundWorker 实例无效");
                return;
            }

            var _args = e.Argument as object[];
            if (_args == null || _args.Length == 0)
            {
                e.Result = Tuple.Create(-1, "参数无效");
                return;
            }

            string errMsg = "";
            int result = -1;

            try
            {
                DataLoaderContext context = new DataLoaderContext();
                context.Worker = _backgroundWorker;
                context.args = _args;
                // 定义进度报告的 Action
                DataLoaderContext.ProgressCallback _reportProgress = percent =>
                {
                    if (worker.WorkerReportsProgress && !worker.CancellationPending)
                        worker.ReportProgress(percent);
                };

                // 定义设置最大值的 Action
                DataLoaderContext.ProgressMaxCallback _setProgressMax = max =>
                {
                    if (_progressDialog != null && !_progressDialog.IsDisposed)
                        _progressDialog.SetProgress(max);
                };

                // 设置标题
                DataLoaderContext.SetProgressHeaderText _setProgressHeader = (progressBarStyle, header, speed) =>
                {
                    if (_progressDialog != null && !_progressDialog.IsDisposed)
                        SetProgressBar(progressBarStyle, header, speed);
                };

                context.reportProgress = _reportProgress;
                context.setProgressMaximum = _setProgressMax;
                context.setProgressHeaderText = _setProgressHeader;
                context.Worker = _backgroundWorker;
                // 调用实际业务逻辑
                result = _delegateFunc(context, out errMsg);
            }
            catch (Exception ex)
            {
                errMsg = $"后台任务发生异常: {ex.Message}";
                result = 0;
            }

            // 返回结果给 RunWorkerCompleted 事件
            e.Result = Tuple.Create(result, errMsg);
        }

        private void BackgroundWorker_ProgressChanged(object sender, ProgressChangedEventArgs e)
        {
            //_progressDialog?.UpdateProgress(e.ProgressPercentage);
            _progressDialog.ProgressValue = (e.ProgressPercentage);
        }

        private void BackgroundWorker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
        {
            if (e.Cancelled)
            {
                MessageBox.Show("操作已取消");
            }
            else if (e.Error != null)
            {
                MessageBox.Show($"发生错误：{e.Error.Message}");
            }
            else
            {
                var resultTuple = (Tuple<int, string>)e.Result;
                _onCompleted?.Invoke(resultTuple.Item1, resultTuple.Item2);
            }

            _progressDialog?.Close();
            _progressDialog?.Dispose();
            _progressDialog = null;
        }

        #region IDisposable Support
        protected virtual void Dispose(bool disposing)
        {
            if (!_disposed)
            {
                if (disposing)
                {
                    _backgroundWorker.Dispose();
                    _progressDialog?.Dispose();
                }

                _disposed = true;
            }
        }

        public void Dispose()
        {
            Dispose(true);
            GC.SuppressFinalize(this);
        }
        #endregion
    }
}