using System;
using System.Linq;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Media;
using AxCopilot.Models;
using AxCopilot.Services;

namespace AxCopilot.Views;

public partial class ChatWindow
{
    private UIElement CreateV2MessageElement(ChatMessage message)
    {
        var isUser = message.Role == "user";
        return isUser ? CreateV2UserBubble(message) : CreateV2AssistantBlock(message);
    }

    private UIElement CreateV2UserBubble(ChatMessage message)
    {
        var primaryText = TryFindResource("PrimaryText") as Brush ?? Brushes.White;
        var secondaryText = TryFindResource("SecondaryText") as Brush ?? Brushes.Gray;
        var borderBrush = TryFindResource("BorderColor") as Brush ?? Brushes.Gray;
        var accentBrush = TryFindResource("AccentColor") as Brush ?? Brushes.CornflowerBlue;
        var hintBg = TryFindResource("HintBackground") as Brush
                     ?? new SolidColorBrush(Color.FromArgb(0x18, 0xFF, 0xFF, 0xFF));

        var msgMaxWidth = GetMessageMaxWidth();
        var wrapper = new StackPanel
        {
            HorizontalAlignment = HorizontalAlignment.Right,
            MaxWidth = msgMaxWidth * 0.85,
            Margin = new Thickness(60, 12, 12, 4),
        };

        // 사용자 아이콘 + 이름 헤더
        var header = new StackPanel
        {
            Orientation = Orientation.Horizontal,
            HorizontalAlignment = HorizontalAlignment.Right,
            Margin = new Thickness(2, 0, 0, 4),
        };
        header.Children.Add(new TextBlock
        {
            Text = "\uE77B", // 사용자 아이콘
            FontFamily = s_segoeIconFont,
            FontSize = 12,
            Foreground = secondaryText,
            VerticalAlignment = VerticalAlignment.Center,
        });
        header.Children.Add(new TextBlock
        {
            Text = "You",
            FontSize = 11,
            FontWeight = FontWeights.SemiBold,
            Foreground = secondaryText,
            Margin = new Thickness(6, 0, 0, 0),
            VerticalAlignment = VerticalAlignment.Center,
        });
        var timestamp = message.Timestamp;
        header.Children.Add(new TextBlock
        {
            Text = timestamp.ToString("HH:mm"),
            FontSize = 10,
            Foreground = secondaryText,
            Opacity = 0.52,
            Margin = new Thickness(8, 0, 0, 1),
            VerticalAlignment = VerticalAlignment.Center,
        });
        wrapper.Children.Add(header);

        // 메시지 본문
        var bubble = new Border
        {
            BorderBrush = borderBrush,
            BorderThickness = new Thickness(1),
            CornerRadius = new CornerRadius(12),
            Padding = new Thickness(14, 10, 14, 10),
            HorizontalAlignment = HorizontalAlignment.Stretch,
        };
        bubble.SetResourceReference(Border.BackgroundProperty, "HintBackground");

        var content = message.Content ?? "";
        if (string.Equals(_activeTab, "Cowork", StringComparison.OrdinalIgnoreCase) ||
            string.Equals(_activeTab, "Code", StringComparison.OrdinalIgnoreCase))
        {
            MarkdownRenderer.EnableFilePathHighlight =
                (System.Windows.Application.Current as App)?.SettingsService?.Settings.Llm.EnableFilePathHighlight ?? true;
            MarkdownRenderer.EnableCodeSymbolHighlight = true;
            bubble.Child = MarkdownRenderer.Render(content, primaryText, secondaryText, accentBrush, hintBg);
        }
        else
        {
            MarkdownRenderer.EnableCodeSymbolHighlight = false;
            bubble.Child = new TextBlock
            {
                Text = content,
                TextAlignment = TextAlignment.Left,
                FontSize = 12,
                Foreground = primaryText,
                TextWrapping = TextWrapping.Wrap,
                LineHeight = 18,
            };
        }

        wrapper.Children.Add(bubble);

        // 우클릭 메뉴
        var capturedContent = content;
        wrapper.MouseRightButtonUp += (_, re) =>
        {
            re.Handled = true;
            ShowMessageContextMenu(capturedContent, "user");
        };

        return wrapper;
    }

    private UIElement CreateV2AssistantBlock(ChatMessage message)
    {
        var primaryText = TryFindResource("PrimaryText") as Brush ?? Brushes.White;
        var secondaryText = TryFindResource("SecondaryText") as Brush ?? Brushes.Gray;
        var accentBrush = TryFindResource("AccentColor") as Brush ?? Brushes.CornflowerBlue;
        var hintBg = TryFindResource("HintBackground") as Brush
                     ?? new SolidColorBrush(Color.FromArgb(0x18, 0xFF, 0xFF, 0xFF));

        // Compaction 메타 메시지 처리
        if (IsCompactionMetaMessage(message))
        {
            var borderBrush = TryFindResource("BorderColor") as Brush ?? Brushes.Gray;
            return CreateCompactionMetaCard(message, primaryText, secondaryText, hintBg, borderBrush, accentBrush);
        }

        var msgMaxWidth = GetMessageMaxWidth();
        var container = new StackPanel
        {
            HorizontalAlignment = HorizontalAlignment.Center,
            Width = msgMaxWidth,
            MaxWidth = msgMaxWidth,
            Margin = new Thickness(0, 8, 0, 8),
        };

        // 에이전트 아이콘 + 이름 헤더
        var (agentName, _, _) = GetAgentIdentity();
        var (iconHost, iconPixels, iconGlows, iconRotate, iconScale) = CreateMiniLauncherIconEx(4.0, "none");
        var header = new StackPanel
        {
            Orientation = Orientation.Horizontal,
            Margin = new Thickness(2, 0, 0, 4),
        };
        header.Children.Add(iconHost);
        header.Children.Add(new TextBlock
        {
            Text = agentName,
            FontSize = 11,
            FontWeight = FontWeights.SemiBold,
            Foreground = secondaryText,
            Margin = new Thickness(6, 0, 0, 0),
            VerticalAlignment = VerticalAlignment.Center,
        });

        // 아이콘 애니메이션
        var canvas = iconHost.Children.OfType<Canvas>().FirstOrDefault();
        if (canvas != null)
        {
            var animState = new ChatIconAnimState
            {
                Host = iconHost, Canvas = canvas, Pixels = iconPixels,
                Glows = iconGlows, Rotate = iconRotate, Scale = iconScale,
                IsRandomMode = _settings.Settings.Launcher.EnableChatIconRandomAnimation,
            };
            StartChatIconAnimation(animState);
        }

        container.Children.Add(header);

        // 마크다운 렌더 본문
        var content = message.Content ?? "";
        var codeBgBrush = TryFindResource("HintBackground") as Brush ?? Brushes.DarkGray;
        MarkdownRenderer.EnableFilePathHighlight =
            (System.Windows.Application.Current as App)?.SettingsService?.Settings.Llm.EnableFilePathHighlight ?? true;
        MarkdownRenderer.EnableCodeSymbolHighlight =
            string.Equals(_activeTab, "Cowork", StringComparison.OrdinalIgnoreCase) ||
            string.Equals(_activeTab, "Code", StringComparison.OrdinalIgnoreCase);

        var contentPanel = new Border
        {
            Background = Brushes.Transparent,
            Padding = new Thickness(6, 4, 6, 4),
        };

        if (IsBranchContextMessage(content))
        {
            contentPanel.Child = MarkdownRenderer.Render(content, primaryText, secondaryText, accentBrush, codeBgBrush);
        }
        else
        {
            contentPanel.Child = MarkdownRenderer.Render(content, primaryText, secondaryText, accentBrush, codeBgBrush);
        }

        container.Children.Add(contentPanel);

        // 파일 퀵 액션
        var outputFilePath = ExtractOutputFilePathFromContent(content);
        if (!string.IsNullOrEmpty(outputFilePath) && System.IO.File.Exists(outputFilePath))
        {
            var quickActions = BuildFileQuickActions(outputFilePath);
            quickActions.Margin = new Thickness(2, 4, 0, 2);
            container.Children.Add(quickActions);
        }

        // 액션 바 (복사, 재생성 등)
        var actionBar = new StackPanel
        {
            Orientation = Orientation.Horizontal,
            HorizontalAlignment = HorizontalAlignment.Left,
            Margin = new Thickness(2, 2, 0, 0),
            Opacity = 0,
        };
        var btnColor = secondaryText;
        var capturedContent = content;

        actionBar.Children.Add(CreateActionButton("\uE8C8", "복사", btnColor, () =>
        {
            try { Clipboard.SetText(capturedContent); } catch { }
        }));
        actionBar.Children.Add(CreateActionButton("\uE72C", "다시 생성", btnColor, () => _ = RegenerateLastAsync()));

        var aiTimestamp = message.Timestamp;
        actionBar.Children.Add(new TextBlock
        {
            Text = aiTimestamp.ToString("HH:mm"),
            FontSize = 10,
            Opacity = 0.6,
            Foreground = btnColor,
            VerticalAlignment = VerticalAlignment.Center,
            Margin = new Thickness(4, 0, 0, 1),
        });

        container.Children.Add(actionBar);

        // 메타 정보 (토큰 등)
        var assistantMeta = CreateAssistantMessageMetaText(message);
        if (assistantMeta != null)
            container.Children.Add(assistantMeta);

        container.MouseEnter += (_, _) =>
            actionBar.BeginAnimation(OpacityProperty,
                new System.Windows.Media.Animation.DoubleAnimation(0.8, TimeSpan.FromMilliseconds(150)));
        container.MouseLeave += (_, _) =>
            actionBar.BeginAnimation(OpacityProperty,
                new System.Windows.Media.Animation.DoubleAnimation(0, TimeSpan.FromMilliseconds(200)));

        var aiContent = content;
        container.MouseRightButtonUp += (_, re) =>
        {
            re.Handled = true;
            ShowMessageContextMenu(aiContent, "assistant");
        };

        return container;
    }
}