using Microsoft.VisualBasic.Logging;
using SnapshotWinFormsApp.Application;
using SnapshotWinFormsApp.Application.Dtos;
using SnapshotWinFormsApp.Application.Interfaces;
using SnapshotWinFormsApp.Repository;
using SnapshotWinFormsApp.Repository.Enum;
using SnapshotWinFormsApp.Tools;
using SqlSugar;
using System.ComponentModel;
using System.Configuration;
using System.Globalization;
using System.Reflection;

namespace SnapshotWinFormsApp;

public partial class MainForm : Form
{
    private readonly DbSqlServer _sqlServerDB;
    private CancellationTokenSource? _cts;
    private EButtonStatusType _startButtonStatus;
    public static ManualResetEventSlim _pauseEvent = new ManualResetEventSlim(true);

    public MainForm(DbSqlServer dbSqlServer)
    {
        _startButtonStatus = EButtonStatusType.Start;
        _sqlServerDB = dbSqlServer;

        InitializeComponent();
        LoadCheckBox();
        LoadCityName();
        logTxt.AppendText("初始化完成\r\n");
        logTxt.AppendText("日志文件夹:" + Logs.Path() + "\r\n");
        startTimePicker.Format = DateTimePickerFormat.Custom;
        startTimePicker.CustomFormat = "yyyy年MM月dd日";
        endTimePicker.Format = DateTimePickerFormat.Custom;
        endTimePicker.CustomFormat = "yyyy年MM月dd日";
    }

    private void LoadCityName()
    {
        cityNameCbox.DataSource = ConfigurationManager.ConnectionStrings
         .Cast<ConnectionStringSettings>()
         .Where(setting => !string.IsNullOrEmpty(setting.ProviderName) && setting.ProviderName.Length < 8)
         .Select(setting => setting.ProviderName)
         .ToHashSet()
         .ToList<string>();
        cityNameCbox.DropDownStyle = ComboBoxStyle.DropDownList;
    }

    private void LoadCheckBox()
    {
        var types = Assembly.GetExecutingAssembly()
                        .GetTypes()
                        .Where(t => t.IsClass && t.Name.StartsWith("ImportApplicationBase") == false && !t.IsAbstract && typeof(IImportApplication).IsAssignableFrom(t))
                        .ToList();

        int rowIndex = 3; 
        int colIndex = 0;

        foreach (var type in types)
        {
            var descriptionAttr = type.GetCustomAttribute<DescriptionAttribute>();
            string description = descriptionAttr?.Description ?? type.Name;

            CheckBox checkBox = new CheckBox
            {
                Text = description,
                Tag = type,
                AutoSize = true
            };

            if (tableLayoutPanel1.RowCount <= rowIndex)
            {
                tableLayoutPanel1.RowCount = rowIndex + 1;
                tableLayoutPanel1.RowStyles.Add(new RowStyle(SizeType.AutoSize));
            }

            tableLayoutPanel1.Controls.Add(checkBox, colIndex, rowIndex);

            colIndex++;
            if (colIndex > 1)
            {
                colIndex = 0;
                rowIndex++;
            }
        }
    }

    private async void OkBtn_Click(object sender, EventArgs e)
    {

        if (_startButtonStatus == EButtonStatusType.Start)
        {
            _startButtonStatus = EButtonStatusType.Pause;
            OkBtn.Text = "暂停";
            _cts = new CancellationTokenSource();
            var tasks = new List<Task>();

            foreach (var control in tableLayoutPanel1.Controls)
            {
                if (control is CheckBox checkBox && checkBox.Checked)
                {
                    AddLog($"初始化任务 [{checkBox.Text}]...");
                    Type type = (Type)checkBox.Tag;
                    if (Activator.CreateInstance(type, new CreateInstanceInDto(_sqlServerDB, cityNameCbox.SelectedItem.ToString(), startTimePicker.Value, endTimePicker.Value, keyTxt.Text)) is IImportApplication instance)
                    {
                        tasks.Add(RunImport(instance, _cts.Token));
                    }
                }
            }

            try
            {
                await Task.WhenAll(tasks);
                AddLog("所有任务完成");
                OkBtn.Text = "开始";
                _startButtonStatus = EButtonStatusType.Start;
            }
            catch (OperationCanceledException)
            {
                AddLog("任务已取消");
                OkBtn.Text = "开始";
                _startButtonStatus = EButtonStatusType.Start;
            }
            return;
        }
        if (_startButtonStatus == EButtonStatusType.Pause)
        {
            _startButtonStatus = EButtonStatusType.Wait;
            OkBtn.Text = "继续";
            _pauseEvent.Reset();
            return;
        }
        if (_startButtonStatus == EButtonStatusType.Wait)
        {
            _startButtonStatus = EButtonStatusType.Pause;
            OkBtn.Text = "暂停";
            _pauseEvent.Set();
            return;
        }
    }

    private async Task RunImport(IImportApplication instance, CancellationToken token)
    {
        await instance.ImportAsync(AddLog, token);
    }

    private void AddLog(string msg)
    {
        this.Invoke((EventHandler)delegate
        {
            this.logTxt.AppendText(msg + "\r\n");
            Logs.Note(msg);
        });
    }

    private void CancelBtn_Click(object sender, EventArgs e)
    {
        _cts?.Cancel();
    }
}