using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Threading;
using AxCopilot.Services.Agent;

namespace AxCopilot.Views;

public partial class ChatWindow
{
    private DispatcherTimer? _v2LiveElapsedTimer;
    private DateTime _v2LiveStartTime;
    private TextBlock? _v2LiveElapsedText;
    private Border? _v2LiveStatusCard;
    private TextBlock? _v2LiveStatusText;
    private TextBlock? _v2LiveStatusDetailText;
    private TextBlock? _v2LiveStatusMetaText;

    /// <summary>V2: 스트리밍 시작 시 라이브 진행 컨테이너 생성</summary>
    private void ShowAgentLiveCardV2(string runTab)
    {
        if (MessageList == null) return;
        if (!string.Equals(runTab, _activeTab, StringComparison.OrdinalIgnoreCase)) return;

        RemoveAgentLiveCardV2(animated: false);

        _v2LiveStartTime = DateTime.UtcNow;
        _v2LiveToolCards.Clear();
        _v2LastLiveToolCallId = null;

        var msgMaxWidth = GetMessageMaxWidth();
        var accentBrush = TryFindResource("AccentColor") as Brush ?? Brushes.CornflowerBlue;
        var accentColor = ResolveLiveProgressAccentColor(accentBrush);
        var secondaryText = TryFindResource("SecondaryText") as Brush ?? Brushes.Gray;
        var primaryText = TryFindResource("PrimaryText") as Brush ?? Brushes.White;

        _v2LiveContainer = new StackPanel
        {
            HorizontalAlignment = HorizontalAlignment.Center,
            Width = msgMaxWidth,
            MaxWidth = msgMaxWidth,
            Margin = new Thickness(0, 4, 0, 6),
        };

        var headerGrid = new Grid { Margin = new Thickness(2, 0, 0, 4) };
        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 (agentName, _, _) = GetAgentIdentity();
        var (liveIconHost, livePixels, liveGlows, liveRotate, liveScale) = CreateMiniLauncherIconEx(4.0, "none");
        var canvas = liveIconHost.Children.OfType<Canvas>().FirstOrDefault();
        if (canvas != null)
        {
            var animState = new ChatIconAnimState
            {
                Host = liveIconHost, Canvas = canvas, Pixels = livePixels,
                Glows = liveGlows, Rotate = liveRotate, Scale = liveScale,
                IsRandomMode = _settings.Settings.Launcher.EnableChatIconRandomAnimation,
            };
            StartChatIconAnimation(animState);
        }

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

        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);

        _v2LiveElapsedText = new TextBlock
        {
            Text = "",
            FontSize = 10,
            Foreground = secondaryText,
            Opacity = 0.70,
            HorizontalAlignment = HorizontalAlignment.Right,
            VerticalAlignment = VerticalAlignment.Center,
        };
        Grid.SetColumn(_v2LiveElapsedText, 2);
        headerGrid.Children.Add(_v2LiveElapsedText);

        _v2LiveContainer.Children.Add(headerGrid);

        _v2LiveStatusText = new TextBlock
        {
            FontSize = 14,
            FontWeight = FontWeights.SemiBold,
            Foreground = primaryText,
            TextWrapping = TextWrapping.Wrap,
            LineHeight = 20,
        };
        _v2LiveStatusDetailText = new TextBlock
        {
            FontSize = 11,
            Foreground = secondaryText,
            Opacity = 0.88,
            TextWrapping = TextWrapping.Wrap,
            LineHeight = 18,
            Margin = new Thickness(0, 4, 0, 0),
        };
        _v2LiveStatusMetaText = new TextBlock
        {
            FontSize = 10,
            Foreground = secondaryText,
            Opacity = 0.72,
            Margin = new Thickness(0, 8, 0, 0),
        };

        _v2LiveStatusCard = new Border
        {
            Background = new SolidColorBrush(Color.FromArgb(0x12, accentColor.R, accentColor.G, accentColor.B)),
            BorderBrush = new SolidColorBrush(Color.FromArgb(0x36, accentColor.R, accentColor.G, accentColor.B)),
            BorderThickness = new Thickness(1),
            CornerRadius = new CornerRadius(12),
            Padding = new Thickness(14, 12, 14, 12),
            Margin = new Thickness(0, 4, 0, 6),
            Child = new StackPanel
            {
                Children =
                {
                    _v2LiveStatusText,
                    _v2LiveStatusDetailText,
                    _v2LiveStatusMetaText,
                }
            }
        };
        _v2LiveContainer.Children.Add(_v2LiveStatusCard);
        RefreshV2LiveStatusCard(runTab);

        AddTranscriptElement(_v2LiveContainer);
        ForceScrollToEnd();

        _v2LiveElapsedTimer = new DispatcherTimer { Interval = TimeSpan.FromSeconds(1) };
        _v2LiveElapsedTimer.Tick += (_, _) =>
        {
            if (_v2LiveElapsedText == null) return;
            var sec = (int)(DateTime.UtcNow - _v2LiveStartTime).TotalSeconds;
            _v2LiveElapsedText.Text = sec > 0 ? $"{sec}초 경과" : "";
        };
        _v2LiveElapsedTimer.Start();
    }

    /// <summary>V2: 에이전트 이벤트 수신 시 라이브 카드 업데이트</summary>
    private void UpdateAgentLiveCardV2(AgentEvent agentEvent)
    {
        if (_v2LiveContainer == null) return;

        var secondaryText = TryFindResource("SecondaryText") as Brush ?? Brushes.Gray;
        var primaryText = TryFindResource("PrimaryText") as Brush ?? Brushes.White;
        var msgMaxWidth = GetMessageMaxWidth();
        UpdateV2LiveStatusCardFromEvent(agentEvent);

        switch (agentEvent.Type)
        {
            case AgentEventType.ToolCall:
            {
                var (icon, iconColor) = GetV2ToolIcon(agentEvent.ToolName);
                var toolId = $"{agentEvent.ToolName}_{agentEvent.Timestamp.Ticks}";
                _v2LastLiveToolCallId = toolId;

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

                var accentColor = ResolveLiveProgressAccentColor(
                    TryFindResource("AccentColor") as Brush ?? Brushes.CornflowerBlue);
                var pulseLine = new Border
                {
                    Width = 2,
                    Background = new SolidColorBrush(Color.FromArgb(0x80, accentColor.R, accentColor.G, accentColor.B)),
                    CornerRadius = new CornerRadius(1),
                    Margin = new Thickness(12, 0, 8, 0),
                };
                var pulseAnim = new DoubleAnimation(0.4, 1.0, TimeSpan.FromMilliseconds(800))
                {
                    AutoReverse = true,
                    RepeatBehavior = RepeatBehavior.Forever,
                    EasingFunction = new SineEase(),
                };
                pulseLine.BeginAnimation(UIElement.OpacityProperty, pulseAnim);
                Grid.SetColumn(pulseLine, 0);
                outerGrid.Children.Add(pulseLine);

                var card = new Border
                {
                    Background = new SolidColorBrush(Color.FromArgb(0x1C, accentColor.R, accentColor.G, accentColor.B)),
                    BorderBrush = new SolidColorBrush(Color.FromArgb(0x40, accentColor.R, accentColor.G, accentColor.B)),
                    BorderThickness = new Thickness(1),
                    CornerRadius = new CornerRadius(8),
                    Padding = new Thickness(10, 6, 10, 6),
                    Tag = "pending",
                };
                Grid.SetColumn(card, 1);

                var sp = new StackPanel { Orientation = Orientation.Horizontal };
                sp.Children.Add(new TextBlock
                {
                    Text = icon,
                    FontSize = 12,
                    Foreground = iconColor,
                    VerticalAlignment = VerticalAlignment.Center,
                    Margin = new Thickness(0, 0, 6, 0),
                });
                sp.Children.Add(new TextBlock
                {
                    Text = GetV2ToolDisplayName(agentEvent.ToolName),
                    FontSize = 11,
                    FontWeight = FontWeights.SemiBold,
                    Foreground = primaryText,
                    VerticalAlignment = VerticalAlignment.Center,
                });
                if (!string.IsNullOrWhiteSpace(agentEvent.FilePath))
                {
                    sp.Children.Add(new TextBlock
                    {
                        Text = TruncateFilePath(agentEvent.FilePath, 50),
                        FontSize = 10,
                        Foreground = secondaryText,
                        Opacity = 0.7,
                        VerticalAlignment = VerticalAlignment.Center,
                        Margin = new Thickness(8, 0, 0, 0),
                    });
                }
                sp.Children.Add(new TextBlock
                {
                    Text = "...",
                    FontSize = 11,
                    Foreground = secondaryText,
                    Opacity = 0.5,
                    VerticalAlignment = VerticalAlignment.Center,
                    Margin = new Thickness(6, 0, 0, 0),
                });
                card.Child = sp;
                outerGrid.Children.Add(card);

                _v2LiveToolCards[toolId] = card;
                _v2LiveContainer.Children.Add(outerGrid);
                AutoScrollIfNeeded();
                break;
            }

            case AgentEventType.ToolResult:
            {
                if (_v2LastLiveToolCallId != null && _v2LiveToolCards.TryGetValue(_v2LastLiveToolCallId, out var pendingCard))
                {
                    var isSuccess = agentEvent.Success;
                    var statusIcon = isSuccess ? "\uE73E" : "\uE711";
                    var statusColor = isSuccess
                        ? new SolidColorBrush(Color.FromRgb(0x66, 0xBB, 0x6A))
                        : new SolidColorBrush(Color.FromRgb(0xEF, 0x53, 0x50));

                    pendingCard.Background = isSuccess
                        ? new SolidColorBrush(Color.FromArgb(0x0A, 0x66, 0xBB, 0x6A))
                        : new SolidColorBrush(Color.FromArgb(0x0A, 0xEF, 0x53, 0x50));
                    pendingCard.BorderBrush = isSuccess
                        ? new SolidColorBrush(Color.FromArgb(0x30, 0x66, 0xBB, 0x6A))
                        : new SolidColorBrush(Color.FromArgb(0x30, 0xEF, 0x53, 0x50));
                    pendingCard.Tag = "complete";

                    if (pendingCard.Child is StackPanel sp)
                    {
                        if (sp.Children.Count > 0 && sp.Children[^1] is TextBlock lastTb && lastTb.Text == "...")
                            sp.Children.RemoveAt(sp.Children.Count - 1);

                        sp.Children.Add(new TextBlock
                        {
                            Text = statusIcon,
                            FontFamily = s_segoeIconFont,
                            FontSize = 11,
                            Foreground = statusColor,
                            VerticalAlignment = VerticalAlignment.Center,
                            Margin = new Thickness(6, 0, 0, 0),
                        });

                        var elapsed = NormalizeProgressElapsedMs(agentEvent.ElapsedMs);
                        if (elapsed > 0)
                        {
                            sp.Children.Add(new TextBlock
                            {
                                Text = $"{elapsed / 1000.0:F1}s",
                                FontSize = 10,
                                Foreground = secondaryText,
                                Opacity = 0.6,
                                VerticalAlignment = VerticalAlignment.Center,
                                Margin = new Thickness(4, 0, 0, 0),
                            });
                        }
                    }

                    var parent = pendingCard.Parent as Grid;
                    if (parent?.Children[0] is Border pulseLine)
                    {
                        pulseLine.BeginAnimation(UIElement.OpacityProperty, null);
                        pulseLine.Opacity = 1;
                        pulseLine.Background = isSuccess
                            ? new SolidColorBrush(Color.FromArgb(0x60, 0x66, 0xBB, 0x6A))
                            : new SolidColorBrush(Color.FromArgb(0x60, 0xEF, 0x53, 0x50));
                    }

                    var cardToCollapse = pendingCard;
                    var outerGridToCollapse = parent;
                    var collapseTimer = new DispatcherTimer { Interval = TimeSpan.FromMilliseconds(1200) };
                    collapseTimer.Tick += (_, _) =>
                    {
                        collapseTimer.Stop();
                        if (cardToCollapse == null) return;
                        var padAnim = new ThicknessAnimation(
                            cardToCollapse.Padding,
                            new Thickness(8, 2, 8, 2),
                            TimeSpan.FromMilliseconds(200))
                        { EasingFunction = new QuadraticEase() };
                        var opAnim = new DoubleAnimation(1.0, 0.55, TimeSpan.FromMilliseconds(200))
                        { EasingFunction = new QuadraticEase() };
                        cardToCollapse.BeginAnimation(Border.PaddingProperty, padAnim);
                        cardToCollapse.BeginAnimation(UIElement.OpacityProperty, opAnim);
                        if (outerGridToCollapse != null)
                            outerGridToCollapse.Margin = new Thickness(0, 1, 0, 1);
                    };
                    collapseTimer.Start();

                    _v2LastLiveToolCallId = null;
                }
                break;
            }

            case AgentEventType.Thinking:
            {
                var thinkText = AgentProgressSummarySanitizer.NormalizeThinkingSummary(
                    agentEvent.Summary,
                    agentEvent.ToolName,
                    maxLength: 100);
                if (string.IsNullOrWhiteSpace(thinkText)) break;

                var thinkRow = new StackPanel
                {
                    Orientation = Orientation.Horizontal,
                    Margin = new Thickness(22, 2, 0, 2),
                };
                thinkRow.Children.Add(new TextBlock
                {
                    Text = "\uE915",
                    FontFamily = s_segoeIconFont,
                    FontSize = 10,
                    Foreground = new SolidColorBrush(Color.FromRgb(0x59, 0xA5, 0xF5)),
                    VerticalAlignment = VerticalAlignment.Center,
                    Margin = new Thickness(0, 0, 4, 0),
                });
                thinkRow.Children.Add(new TextBlock
                {
                    Text = thinkText,
                    FontSize = 10.5,
                    FontStyle = FontStyles.Italic,
                    Foreground = secondaryText,
                    Opacity = 0.82,
                    TextTrimming = TextTrimming.CharacterEllipsis,
                    MaxWidth = msgMaxWidth - 60,
                });
                _v2LiveContainer.Children.Add(thinkRow);
                AutoScrollIfNeeded();
                break;
            }
        }
    }

    /// <summary>V2: 스트리밍 종료 시 라이브 카드 제거</summary>
    private void RemoveAgentLiveCardV2(bool animated = true)
    {
        _v2LiveElapsedTimer?.Stop();
        _v2LiveElapsedTimer = null;
        _v2LiveElapsedText = null;
        _v2LiveStatusCard = null;
        _v2LiveStatusText = null;
        _v2LiveStatusDetailText = null;
        _v2LiveStatusMetaText = null;

        if (_v2LiveContainer == null) return;

        _chatIconAnimStates.RemoveAll(s => s.Host != null && !s.Host.IsVisible);

        var toRemove = _v2LiveContainer;
        _v2LiveContainer = null;
        _v2LiveToolCards.Clear();
        _v2LastLiveToolCallId = null;

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

        RemoveTranscriptElement(toRemove);
    }

    private void RefreshV2LiveStatusCard(string runTab)
    {
        if (_v2LiveStatusText == null)
            return;

        var hint = GetLiveAgentProgressHint(runTab);
        if (hint != null)
        {
            var narrative = AgentStatusNarrativeCatalog.BuildFromEvent(hint, runTab);
            var hintSummary = string.IsNullOrWhiteSpace(hint.Summary)
                ? narrative.Message
                : hint.Summary;
            UpdateV2LiveStatusCard(hintSummary, narrative.Detail, BuildReadableProgressMetaText(hint));
            return;
        }

        var initial = AgentStatusNarrativeCatalog.BuildInitial(runTab);
        UpdateV2LiveStatusCard(initial.Message, initial.Detail, null);
    }

    private void UpdateV2LiveStatusCardFromEvent(AgentEvent agentEvent)
    {
        if (_v2LiveStatusText == null)
            return;

        var narrative = AgentStatusNarrativeCatalog.BuildFromEvent(agentEvent, _activeTab);
        var normalizedThinking = agentEvent.Type == AgentEventType.Thinking
            ? AgentProgressSummarySanitizer.NormalizeThinkingSummary(
                agentEvent.Summary,
                agentEvent.ToolName,
                maxLength: 160)
            : string.Empty;
        var message = string.IsNullOrWhiteSpace(normalizedThinking)
            ? narrative.Message
            : normalizedThinking;
        UpdateV2LiveStatusCard(message, narrative.Detail, BuildReadableProgressMetaText(agentEvent));
    }

    private void UpdateV2LiveStatusCard(string message, string? detail, string? meta)
    {
        if (_v2LiveStatusText == null || _v2LiveStatusDetailText == null || _v2LiveStatusMetaText == null)
            return;

        _v2LiveStatusText.Text = string.IsNullOrWhiteSpace(message)
            ? "작업을 이어가고 있습니다..."
            : message;

        _v2LiveStatusDetailText.Text = detail ?? string.Empty;
        _v2LiveStatusDetailText.Visibility = string.IsNullOrWhiteSpace(detail)
            ? Visibility.Collapsed
            : Visibility.Visible;

        _v2LiveStatusMetaText.Text = meta ?? string.Empty;
        _v2LiveStatusMetaText.Visibility = string.IsNullOrWhiteSpace(meta)
            ? Visibility.Collapsed
            : Visibility.Visible;
    }
}