using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Threading;

namespace AxCopilot.Views;

public partial class ChatWindow
{
    private void ShowAgentLiveCard(string runTab)
    {
        if (MessageList == null) return;
        if (!string.Equals(runTab, _activeTab, StringComparison.OrdinalIgnoreCase)) return;

        RemoveAgentLiveCard(animated: false);

        _agentLiveStartTime = DateTime.UtcNow;
        _agentLiveSubItemTexts.Clear();
        _agentLiveCurrentCategory = null;

        var msgMaxWidth = GetMessageMaxWidth();
        var secondaryText = TryFindResource("SecondaryText") as Brush ?? Brushes.Gray;
        var borderBrush = TryFindResource("BorderColor") as Brush ?? Brushes.Gray;

        var container = new StackPanel
        {
            HorizontalAlignment = HorizontalAlignment.Center,
            Width = msgMaxWidth,
            MaxWidth = msgMaxWidth,
            Margin = new Thickness(0, 4, 0, 6),
            Opacity = IsLightweightLiveProgressMode(runTab) ? 1 : 0,
            RenderTransform = IsLightweightLiveProgressMode(runTab)
                ? Transform.Identity
                : new TranslateTransform(0, 8),
        };
        if (!IsLightweightLiveProgressMode(runTab))
        {
            container.BeginAnimation(UIElement.OpacityProperty,
                new DoubleAnimation(0, 1, TimeSpan.FromMilliseconds(260)));
            ((TranslateTransform)container.RenderTransform).BeginAnimation(
                TranslateTransform.YProperty,
                new DoubleAnimation(8, 0, TimeSpan.FromMilliseconds(280))
                {
                    EasingFunction = new QuadraticEase { EasingMode = EasingMode.EaseOut }
                });
        }

        var headerGrid = new Grid { Margin = new Thickness(2, 0, 0, 3) };
        headerGrid.ColumnDefinitions.Add(new ColumnDefinition { Width = GridLength.Auto });
        headerGrid.ColumnDefinitions.Add(new ColumnDefinition { Width = GridLength.Auto });
        headerGrid.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(1, GridUnitType.Star) });

        var liveIcon = CreateMiniLauncherIcon(pixelSize: 4.0);
        if (!IsLightweightLiveProgressMode(runTab))
        {
            liveIcon.BeginAnimation(
                UIElement.OpacityProperty,
                new DoubleAnimation(1.0, 0.35, TimeSpan.FromMilliseconds(750))
                {
                    AutoReverse = true,
                    RepeatBehavior = RepeatBehavior.Forever,
                    EasingFunction = new SineEase()
                });
        }

        Grid.SetColumn(liveIcon, 0);
        headerGrid.Children.Add(liveIcon);

        var (agentName, _, _) = GetAgentIdentity();
        var nameTb = new TextBlock
        {
            Text = agentName,
            FontSize = 11,
            FontWeight = FontWeights.SemiBold,
            Foreground = secondaryText,
            Margin = new Thickness(6, 0, 0, 0),
            VerticalAlignment = VerticalAlignment.Center,
        };
        Grid.SetColumn(nameTb, 1);
        headerGrid.Children.Add(nameTb);

        _agentLiveElapsedText = new TextBlock
        {
            Text = "",
            FontSize = 10,
            Foreground = secondaryText,
            Opacity = 0.50,
            HorizontalAlignment = HorizontalAlignment.Right,
            VerticalAlignment = VerticalAlignment.Center,
        };
        Grid.SetColumn(_agentLiveElapsedText, 2);
        headerGrid.Children.Add(_agentLiveElapsedText);
        container.Children.Add(headerGrid);

        var card = new Border
        {
            BorderBrush = borderBrush,
            BorderThickness = new Thickness(1),
            CornerRadius = new CornerRadius(12),
            Padding = new Thickness(13, 10, 13, 10),
        };
        card.SetResourceReference(Border.BackgroundProperty, "ItemBackground");

        var cardStack = new StackPanel();
        _agentLiveStatusText = new TextBlock
        {
            Text = "준비 중...",
            FontSize = 12,
            FontFamily = new FontFamily("Segoe UI, Malgun Gothic"),
            Foreground = secondaryText,
            TextWrapping = TextWrapping.Wrap,
        };
        cardStack.Children.Add(_agentLiveStatusText);

        _agentLiveSubItems = new StackPanel { Margin = new Thickness(0, 6, 0, 0) };
        cardStack.Children.Add(_agentLiveSubItems);

        card.Child = cardStack;
        container.Children.Add(card);

        _agentLiveContainer = container;
        AddTranscriptElement(container);
        ForceScrollToEnd();

        _agentLiveElapsedTimer = new DispatcherTimer { Interval = TimeSpan.FromSeconds(1) };
        _agentLiveElapsedTimer.Tick += (_, _) =>
        {
            if (_agentLiveElapsedText == null)
                return;

            var sec = (int)(DateTime.UtcNow - _agentLiveStartTime).TotalSeconds;
            _agentLiveElapsedText.Text = sec > 0 ? $"{sec}초 경과" : "";
        };
        _agentLiveElapsedTimer.Start();
    }

    private void UpdateAgentLiveCard(string message, string? subItem = null,
        string? category = null, bool clearSubItems = false)
    {
        if (_agentLiveContainer == null || _agentLiveStatusText == null) return;

        _agentLiveStatusText.Text = message;

        if (clearSubItems || (category != null && category != _agentLiveCurrentCategory))
        {
            _agentLiveSubItemTexts.Clear();
            _agentLiveSubItems?.Children.Clear();
            if (category != null)
                _agentLiveCurrentCategory = category;
        }

        if (string.IsNullOrEmpty(subItem) || _agentLiveSubItemTexts.Contains(subItem))
            return;

        _agentLiveSubItemTexts.Add(subItem);
        const int maxLiveSubItems = 8;
        if (_agentLiveSubItemTexts.Count > maxLiveSubItems)
        {
            _agentLiveSubItemTexts.RemoveAt(0);
            if (_agentLiveSubItems?.Children.Count > 0)
                _agentLiveSubItems.Children.RemoveAt(0);
        }

        var secondary = TryFindResource("SecondaryText") as Brush ?? Brushes.Gray;
        var tb = new TextBlock
        {
            Text = $"› {subItem}",
            FontSize = 10.5,
            FontFamily = new FontFamily("Segoe UI, Malgun Gothic"),
            Foreground = secondary,
            Opacity = 0.62,
            TextTrimming = TextTrimming.CharacterEllipsis,
            MaxWidth = 520,
            Margin = new Thickness(0, 1, 0, 0),
        };
        _agentLiveSubItems?.Children.Add(tb);
        ForceScrollToEnd();
    }

    private void RemoveAgentLiveCard(bool animated = true)
    {
        _agentLiveElapsedTimer?.Stop();
        _agentLiveElapsedTimer = null;

        if (_agentLiveContainer == null)
            return;

        var toRemove = _agentLiveContainer;
        _agentLiveContainer = null;
        _agentLiveStatusText = null;
        _agentLiveSubItems = null;
        _agentLiveElapsedText = null;
        _agentLiveSubItemTexts.Clear();
        _agentLiveCurrentCategory = null;

        if (animated && ContainsTranscriptElement(toRemove) && !IsLightweightLiveProgressMode())
        {
            var anim = new DoubleAnimation(toRemove.Opacity, 0, TimeSpan.FromMilliseconds(160));
            anim.Completed += (_, _) => RemoveTranscriptElement(toRemove);
            toRemove.BeginAnimation(UIElement.OpacityProperty, anim);
            return;
        }

        RemoveTranscriptElement(toRemove);
    }
}