using System;
using System.IO;
using System.Linq;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Windows.Media;
using Microsoft.Data.Sqlite;
using Xunit;
using ytLive.Helpers;
using ytLive.ViewModels;

namespace ytLive.Tests;

[Collection("RealApp")]
public sealed class LogsPanelTests
{
    private readonly RealAppHost _app;

    public LogsPanelTests(RealAppHost app) => _app = app;

    [Fact]
    public void NonEditPanel_DefaultsToLiveChat_AndShowsCurrentLaunchLogsNewestFirst()
    {
        var directory = Path.Combine(Path.GetTempPath(), $"ytlive-logs-panel-{Guid.NewGuid():N}");
        Directory.CreateDirectory(directory);
        var databasePath = Path.Combine(directory, "layout.db");
        var logPath = Path.Combine(directory, "startup.log");
        File.WriteAllText(logPath, "previous-launch-sentinel" + Environment.NewLine);
        AppLog.PathOverride = logPath;
        MainViewModel.LayoutPathOverride = databasePath;

        try
        {
            _app.Run(() =>
            {
                var window = new MainWindow();
                try
                {
                    window.Show();
                    window.UpdateLayout();
                    var vm = (MainViewModel)window.DataContext;
                    vm.EditingActive = false;
                    window.UpdateLayout();
                    var panel = (UserControl)window.FindName("LeftPanel")!;
                    var chatTab = (ToggleButton)panel.FindName("LiveChatTabButton")!;
                    var logsTab = (ToggleButton)panel.FindName("LogsTabButton")!;
                    var logList = (ListBox)panel.FindName("LogListBox")!;

                    Assert.True(vm.IsLiveChatTabSelected);
                    Assert.True(chatTab.IsChecked);
                    Assert.False(logsTab.IsChecked);
                    Assert.False(logList.IsVisible);

                    vm.IsLogsTabSelected = true;
                    window.UpdateLayout();
                    Assert.True(logsTab.IsChecked);
                    Assert.False(chatTab.IsChecked);
                    Assert.True(logList.IsVisible);

                    AppLog.Write("LogsPanel older marker");
                    AppLog.Write("LogsPanel newer marker");
                    AppLog.WriteWarning("LogsPanel warning marker");
                    AppLog.WriteSuccess("LogsPanel success marker");
                    AppLog.Write("LogsPanel class 2 marker " + new string('2', 240),
                        AppLogMessageType.Error, AppLogErrorClass.Class2);
                    AppLog.Write("LogsPanel class 1 marker " + new string('1', 240),
                        AppLogMessageType.Error, AppLogErrorClass.Class1);
                    vm.RefreshCurrentLaunchLogs();
                    window.UpdateLayout();

                    var entries = vm.CurrentLaunchLogEntries.Select(entry => entry.Text).ToArray();
                    var newerIndex = Array.FindIndex(entries, text => text.Contains("LogsPanel newer marker", StringComparison.Ordinal));
                    var olderIndex = Array.FindIndex(entries, text => text.Contains("LogsPanel older marker", StringComparison.Ordinal));
                    Assert.True(newerIndex >= 0 && olderIndex >= 0, "new log writes did not reach the Logs tab");
                    Assert.True(newerIndex < olderIndex, "the Logs tab must put the newest entry first");
                    Assert.DoesNotContain(entries, text => text.Contains("previous-launch-sentinel", StringComparison.Ordinal));
                    Assert.Same(vm.CurrentLaunchLogEntries, logList.ItemsSource);

                    var class1 = vm.PinnedLogEntries.Single(entry => entry.Text.Contains("LogsPanel class 1 marker", StringComparison.Ordinal));
                    var class2 = vm.PinnedLogEntries.Single(entry => entry.Text.Contains("LogsPanel class 2 marker", StringComparison.Ordinal));
                    Assert.True(Array.IndexOf(vm.PinnedLogEntries.ToArray(), class1)
                                < Array.IndexOf(vm.PinnedLogEntries.ToArray(), class2));
                    Assert.Equal("CLASS 1", class1.ErrorClassLabel);
                    Assert.Equal("CLASS 2", class2.ErrorClassLabel);
                    Assert.Equal("CLASS 1", class1.TypeLabel);

                    var pinnedPanel = (ItemsControl)panel.FindName("PinnedLogPanel")!;
                    Assert.Equal(System.Windows.Visibility.Visible, pinnedPanel.Visibility);
                    var class1Text = Find(pinnedPanel, element => element is TextBlock text
                        && text.Text.Contains("LogsPanel class 1 marker", StringComparison.Ordinal)) as TextBlock;
                    var class2Text = Find(pinnedPanel, element => element is TextBlock text
                        && text.Text.Contains("LogsPanel class 2 marker", StringComparison.Ordinal)) as TextBlock;
                    Assert.NotNull(class1Text);
                    Assert.NotNull(class2Text);
                    Assert.Equal(TextWrapping.Wrap, class1Text!.TextWrapping);
                    Assert.Equal(BrushColor("Brush.Error"), Assert.IsType<SolidColorBrush>(class1Text.Foreground).Color);
                    Assert.Equal(BrushColor("Brush.Attention"), Assert.IsType<SolidColorBrush>(class2Text!.Foreground).Color);

                    var warningText = Find(logList, element => element is TextBlock text
                        && text.Text.Contains("LogsPanel warning marker", StringComparison.Ordinal)) as TextBlock;
                    var successText = Find(logList, element => element is TextBlock text
                        && text.Text.Contains("LogsPanel success marker", StringComparison.Ordinal)) as TextBlock;
                    var infoText = Find(logList, element => element is TextBlock text
                        && text.Text.Contains("LogsPanel newer marker", StringComparison.Ordinal)) as TextBlock;
                    Assert.NotNull(warningText);
                    Assert.NotNull(successText);
                    Assert.NotNull(infoText);
                    Assert.Equal(BrushColor("Brush.Secondary"), Assert.IsType<SolidColorBrush>(warningText!.Foreground).Color);
                    Assert.Equal(BrushColor("Brush.Positive"), Assert.IsType<SolidColorBrush>(successText!.Foreground).Color);
                    Assert.Equal(BrushColor("Brush.OnSurfaceVariant"), Assert.IsType<SolidColorBrush>(infoText!.Foreground).Color);

                    var class1Ack = Find(pinnedPanel, element => element is Button button
                        && button.DataContext is AppLogEntry entry && entry.Sequence == class1.Sequence) as Button;
                    Assert.NotNull(class1Ack?.Command);
                    Assert.Same(class1, class1Ack!.CommandParameter);
                    class1Ack!.Command!.Execute(class1Ack.CommandParameter);
                    Assert.DoesNotContain(class1, vm.PinnedLogEntries);
                    Assert.Contains(class1, vm.CurrentLaunchLogEntries);
                }
                finally
                {
                    window.Close();
                }
            });
        }
        finally
        {
            MainViewModel.LayoutPathOverride = null;
            AppLog.PathOverride = null;
            SqliteConnection.ClearAllPools();
            try { Directory.Delete(directory, recursive: true); } catch { }
        }
    }

    private static System.Windows.Media.Color BrushColor(string key)
        => Assert.IsType<SolidColorBrush>(Application.Current!.FindResource(key)).Color;

    private static DependencyObject? Find(DependencyObject parent, Func<DependencyObject, bool> predicate)
    {
        if (predicate(parent)) return parent;
        for (var i = 0; i < VisualTreeHelper.GetChildrenCount(parent); i++)
        {
            var child = VisualTreeHelper.GetChild(parent, i);
            if (predicate(child)) return child;
            var found = Find(child, predicate);
            if (found != null) return found;
        }
        return null;
    }
}