using Microsoft.Win32;
using System;
using System.IO;
using System.Threading;
using System.Windows;

namespace AnotherReplayReader
{
    public sealed class DebugMessageWrapper
    {
        public readonly struct Proxy
        {
            public readonly string Payload;
            public Proxy(string text)
            {
                Payload = text;
            }
            public static Proxy operator +(Proxy p, string text)
            {
                return string.IsNullOrEmpty(p.Payload) ? new Proxy(text) : new Proxy(p.Payload + text);
            }
        }

        public event Action<string>? NewText;
        public Proxy DebugMessage
        {
            get => new Proxy();
            set => NewText?.Invoke(value.Payload);
        }

        public event Action? RequestedSave;
        public void RequestSave() => RequestedSave?.Invoke();
    }
    /// <summary>
    /// Debug.xaml 的交互逻辑
    /// </summary>
    public sealed partial class Debug : Window
    {
        public static readonly DebugMessageWrapper Instance = new DebugMessageWrapper();
        private static Debug? _window = null;

        public static void Initialize()
        {
            Interlocked.CompareExchange(ref _window, new(), null);
            _window.InitializeComponent();
            Instance.NewText += _window.AppendText;
            Instance.RequestedSave += _window.ExportInMainWindow;
        }

        public static new void ShowDialog() => (_window as Window)?.ShowDialog();

        private Debug() { }

        private void OnExport_Click(object sender, RoutedEventArgs e) => Export(this);

        private void OnClear_Click(object sender, RoutedEventArgs e) => _textBox.Clear();

        private void AppendText(string s) => Dispatcher.Invoke(() => _textBox.AppendText(s));

        private void ExportInMainWindow() => Export(Application.Current.MainWindow);

        private void Export(Window owner)
        {
            Dispatcher.Invoke(() =>
            {
                var saveFileDialog = new SaveFileDialog
                {
                    Filter = "文本文档 (*.txt)|*.txt|所有文件 (*.*)|*.*",
                    OverwritePrompt = true,
                };

                var result = saveFileDialog.ShowDialog(owner);
                if (result == true)
                {
                    using (var file = saveFileDialog.OpenFile())
                    using (var writer = new StreamWriter(file))
                    {
                        writer.Write(_textBox.Text);
                    }
                }
            });
        }
    }
}