Merge pull request 'change model and UI library to Spectre.Console.' (#1) from Branched-ui into main

Reviewed-on: #1

ConsoleRenderer.cs

@@ -1,3 +1,4 @@
+using Spectre.Console;
 using YoutubeSummarizer.Models;
 
 namespace YoutubeSummarizer.Services;
@@ -7,75 +8,88 @@ namespace YoutubeSummarizer.Services;
 /// Keeping display logic separate from business logic makes it easy to
 /// later add output modes (JSON, Markdown file, HTML report) without
 /// touching the service layer.
+///
+/// Rendering is delegated to Spectre.Console, which handles colour,
+/// word-wrap to the current terminal width, and graceful degradation
+/// when output is redirected to a file or a non-ANSI terminal.
 /// </summary>
 public static class ConsoleRenderer
 {
-    // ANSI color codes. These render correctly in most Linux terminals.
-    // If you pipe output to a file, the escape codes will appear as-is —
-    // run with --no-color if that's a concern (not implemented here, left
-    // as an exercise).
-    private const string Reset   = "\x1b[0m";
-    private const string Bold    = "\x1b[1m";
-    private const string Cyan    = "\x1b[36m";
-    private const string Yellow  = "\x1b[33m";
-    private const string Green   = "\x1b[32m";
-    private const string Red     = "\x1b[31m";
-    private const string Dim     = "\x1b[2m";
-
     /// <summary>Prints the application banner on startup.</summary>
     public static void PrintBanner()
     {
-        Console.WriteLine();
-        Console.WriteLine($"{Bold}{Cyan}╔════════════════════════════════════════╗{Reset}");
-        Console.WriteLine($"{Bold}{Cyan}║       YouTube Video Summarizer         ║{Reset}");
-        Console.WriteLine($"{Bold}{Cyan}╚════════════════════════════════════════╝{Reset}");
-        Console.WriteLine();
+        AnsiConsole.WriteLine();
+        AnsiConsole.Write(new FigletText("YT Summary").Centered().Color(Color.Red));
+        AnsiConsole.Write(
+            new Rule("[grey]YouTube Video Summarizer[/]")
+                .RuleStyle("grey")
+                .Centered());
+        AnsiConsole.WriteLine();
     }
 
+    /// <summary>
+    /// True when the terminal can drive Spectre's interactive prompts. When output
+    /// is redirected or piped we fall back to plain reads / default answers so the
+    /// app still works in scripts and CI.
+    /// </summary>
+    private static bool Interactive => AnsiConsole.Profile.Capabilities.Interactive;
+
     /// <summary>Prompts the user for a URL and reads input.</summary>
     public static string PromptForUrl()
     {
-        Console.Write($"{Bold}Enter YouTube URL (or 'q' to quit):{Reset} ");
+        if (!Interactive)
+        {
+            AnsiConsole.Markup("[bold]Enter YouTube URL[/] [grey](or 'q' to quit)[/]: ");
             return Console.ReadLine()?.Trim() ?? string.Empty;
         }
 
+        var input = AnsiConsole.Prompt(
+            new TextPrompt<string>("[bold]Enter YouTube URL[/] [grey](or 'q' to quit)[/]:")
+                .AllowEmpty());
+        return input.Trim();
+    }
+
     /// <summary>
     /// Asks the user whether they want to save the transcript to a text file.
-    /// Returns true if the user answers yes.
+    /// Defaults to <c>true</c> — pressing Enter accepts.
     /// </summary>
     public static bool PromptSaveTranscript()
     {
-        Console.Write($"{Bold}Save transcript to file? (y/n):{Reset} ");
-        var answer = Console.ReadLine()?.Trim() ?? string.Empty;
-        return answer.Equals("y", StringComparison.OrdinalIgnoreCase)
-            || answer.Equals("yes", StringComparison.OrdinalIgnoreCase);
+        if (!Interactive) return true;
+        return AnsiConsole.Confirm("[bold]Save transcript to file?[/]", defaultValue: true);
     }
 
     /// <summary>Prints a success message with the saved file path.</summary>
     public static void PrintFileSaved(string filePath)
     {
-        Console.WriteLine($"  {Green}✓ Transcript saved to:{Reset} {filePath}");
-        Console.WriteLine();
+        AnsiConsole.MarkupLine($"[green]✓[/] Transcript saved to: [blue]{Markup.Escape(filePath)}[/]");
+        AnsiConsole.WriteLine();
     }
 
     /// <summary>
-    /// Prompts the user to choose a summary mode.
-    /// Returns the selected <see cref="SummaryMode"/>.
+    /// Prompts the user to choose a summary mode via an arrow-key selection list.
+    /// <see cref="SummaryMode.Standard"/> is listed first so it is the highlighted
+    /// default — pressing Enter accepts it.
     /// </summary>
     public static SummaryMode PromptSummaryMode()
     {
-        Console.WriteLine($"  {Dim}Summary modes:{Reset}");
-        Console.WriteLine($"    {Bold}1{Reset} – Standard (detailed bullet-point summary)");
-        Console.WriteLine($"    {Bold}2{Reset} – Personal Filter (relevance verdict: ACT / MONITOR / IGNORE)");
-        Console.Write($"{Bold}Choose summary mode [1]:{Reset} ");
-        var choice = Console.ReadLine()?.Trim() ?? string.Empty;
-        return choice == "2" ? SummaryMode.PersonalFilter : SummaryMode.Standard;
+        if (!Interactive) return SummaryMode.Standard;
+        return AnsiConsole.Prompt(
+            new SelectionPrompt<SummaryMode>()
+                .Title("[bold]Choose summary mode:[/]")
+                .AddChoices(SummaryMode.Standard, SummaryMode.PersonalFilter)
+                .UseConverter(m => m switch
+                {
+                    SummaryMode.Standard       => "Standard – detailed bullet-point summary",
+                    SummaryMode.PersonalFilter => "Personal Filter – relevance verdict (ACT / MONITOR / IGNORE)",
+                    _                          => m.ToString()
+                }));
     }
 
-    /// <summary>Displays a spinner-style "working" indicator while async work runs.</summary>
+    /// <summary>Prints a dim "working" indicator before an async step.</summary>
     public static void PrintWorking(string message)
     {
-        Console.WriteLine($"  {Dim}→ {message}...{Reset}");
+        AnsiConsole.MarkupLine($"[grey]→ {Markup.Escape(message)}...[/]");
     }
 
     /// <summary>
@@ -85,113 +99,74 @@ public static class ConsoleRenderer
     /// </summary>
     public static void PrintSummary(VideoSummary summary, bool showTranscriptSource)
     {
-        Console.WriteLine();
-        PrintDivider();
+        AnsiConsole.WriteLine();
 
         // ── Metadata header ──────────────────────────────────────────────────
-        Console.WriteLine($"{Bold}{Green}  {summary.Metadata.Title}{Reset}");
-        Console.WriteLine($"  {Dim}Channel:{Reset}  {summary.Metadata.ChannelTitle}");
-        Console.WriteLine($"  {Dim}Published:{Reset} {summary.Metadata.PublishedAt:MMMM d, yyyy}");
-        Console.WriteLine($"  {Dim}Duration:{Reset}  {summary.Metadata.FormattedDuration}");
-        Console.WriteLine($"  {Dim}URL:{Reset}      https://youtu.be/{summary.Metadata.VideoId}");
+        var grid = new Grid();
+        grid.AddColumn(new GridColumn().PadRight(2));
+        grid.AddColumn();
+
+        grid.AddRow("[bold green]Title[/]", $"[bold]{Markup.Escape(summary.Metadata.Title)}[/]");
+        grid.AddRow("[grey]Channel[/]", Markup.Escape(summary.Metadata.ChannelTitle));
+        grid.AddRow("[grey]Published[/]", Markup.Escape(summary.Metadata.PublishedAt.ToString("MMMM d, yyyy")));
+        grid.AddRow("[grey]Duration[/]", Markup.Escape(summary.Metadata.FormattedDuration));
+        grid.AddRow("[grey]URL[/]", $"https://youtu.be/{Markup.Escape(summary.Metadata.VideoId)}");
 
-        // ── Transcript source badge ──────────────────────────────────────────
         if (showTranscriptSource)
         {
             var (badge, color) = summary.TranscriptSource switch
             {
-                TranscriptSource.OwnerPublished      => ("✓ Owner-published captions", Green),
-                TranscriptSource.CommunityContributed=> ("✓ Community captions", Green),
-                TranscriptSource.AutoGenerated       => ("~ Auto-generated (ASR)", Yellow),
-                TranscriptSource.MetadataOnly        => ("✗ Metadata only", Red),
-                _                                    => ("? Unknown", Dim)
+                TranscriptSource.OwnerPublished       => ("✓ Owner-published captions", "green"),
+                TranscriptSource.CommunityContributed => ("✓ Community captions", "green"),
+                TranscriptSource.AutoGenerated        => ("~ Auto-generated (ASR)", "yellow"),
+                TranscriptSource.MetadataOnly         => ("✗ Metadata only", "red"),
+                _                                     => ("? Unknown", "grey")
             };
-            Console.WriteLine($"  {Dim}Transcript:{Reset} {color}{badge}{Reset}");
+            grid.AddRow("[grey]Transcript[/]", $"[{color}]{Markup.Escape(badge)}[/]");
         }
 
-        Console.WriteLine($"  {Dim}Model:{Reset}    {summary.ModelUsed}");
-        Console.WriteLine($"  {Dim}Generated:{Reset} {summary.GeneratedAt:yyyy-MM-dd HH:mm} UTC");
+        grid.AddRow("[grey]Model[/]", Markup.Escape(summary.ModelUsed));
+        grid.AddRow("[grey]Generated[/]", Markup.Escape(summary.GeneratedAt.ToString("yyyy-MM-dd HH:mm")) + " UTC");
 
-        PrintDivider();
+        AnsiConsole.Write(grid);
+        AnsiConsole.WriteLine();
 
         // ── Quality warning ──────────────────────────────────────────────────
         if (summary.QualityWarning is not null)
         {
-            Console.WriteLine();
-            Console.WriteLine($"  {Yellow}{summary.QualityWarning}{Reset}");
+            AnsiConsole.Write(
+                new Panel($"[yellow]{Markup.Escape(summary.QualityWarning)}[/]")
+                {
+                    Header = new PanelHeader("Quality warning"),
+                    Border = BoxBorder.Rounded,
+                    BorderStyle = new Style(Color.Yellow)
+                });
+            AnsiConsole.WriteLine();
         }
 
         // ── Summary body ─────────────────────────────────────────────────────
-        Console.WriteLine();
-        Console.WriteLine($"{Bold}  SUMMARY{Reset}");
-        Console.WriteLine();
-
-        // Word-wrap the summary body at 80 characters so it's readable in
-        // standard terminal widths without horizontal scrolling.
-        foreach (var line in WordWrap(summary.SummaryText, maxWidth: 78))
+        AnsiConsole.Write(
+            new Panel(Markup.Escape(summary.SummaryText))
             {
-            Console.WriteLine($"  {line}");
-        }
+                Header = new PanelHeader("Summary"),
+                Border = BoxBorder.Rounded,
+                Padding = new Padding(2, 1, 2, 1)
+            }.Expand());
 
-        Console.WriteLine();
-        PrintDivider();
-        Console.WriteLine();
+        AnsiConsole.WriteLine();
     }
 
     /// <summary>Prints a styled error message.</summary>
     public static void PrintError(string message)
     {
-        Console.WriteLine();
-        Console.WriteLine($"  {Red}✗ Error: {message}{Reset}");
-        Console.WriteLine();
+        AnsiConsole.WriteLine();
+        AnsiConsole.MarkupLine($"[red]✗ Error:[/] {Markup.Escape(message)}");
+        AnsiConsole.WriteLine();
     }
 
     /// <summary>Prints a styled warning (non-fatal).</summary>
     public static void PrintWarning(string message)
     {
-        Console.WriteLine($"  {Yellow}⚠ {message}{Reset}");
-    }
-
-    // ─────────────────────────────────────────────────────────────────────────
-    // Private helpers
-    // ─────────────────────────────────────────────────────────────────────────
-
-    private static void PrintDivider()
-    {
-        Console.WriteLine($"  {Dim}{"─".PadRight(74, '─')}{Reset}");
-    }
-
-    /// <summary>
-    /// Splits text into lines no wider than <paramref name="maxWidth"/> characters,
-    /// breaking only at word boundaries. Respects existing newlines in the input.
-    /// </summary>
-    private static IEnumerable<string> WordWrap(string text, int maxWidth)
-    {
-        foreach (var paragraph in text.Split('\n'))
-        {
-            if (string.IsNullOrWhiteSpace(paragraph))
-            {
-                yield return string.Empty;
-                continue;
-            }
-
-            var words = paragraph.Split(' ', StringSplitOptions.RemoveEmptyEntries);
-            var current = new System.Text.StringBuilder();
-
-            foreach (var word in words)
-            {
-                if (current.Length + word.Length + 1 > maxWidth)
-                {
-                    yield return current.ToString();
-                    current.Clear();
-                }
-
-                if (current.Length > 0) current.Append(' ');
-                current.Append(word);
-            }
-
-            if (current.Length > 0)
-                yield return current.ToString();
-        }
+        AnsiConsole.MarkupLine($"[yellow]⚠ {Markup.Escape(message)}[/]");
     }
 }

Program.cs

@@ -1,5 +1,6 @@
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
+using Spectre.Console;
 using YoutubeSummarizer.Configuration;
 using YoutubeSummarizer.Models;
 using YoutubeSummarizer.Services;
@@ -51,7 +52,6 @@ var serviceProvider = services.BuildServiceProvider();
 // ═════════════════════════════════════════════════════════════════════════════
 //  Main loop
 // ═════════════════════════════════════════════════════════════════════════════
-
 ConsoleRenderer.PrintBanner();
 
 // Handle Ctrl+C gracefully so any in-progress API call can finish or cancel.
@@ -60,7 +60,7 @@ Console.CancelKeyPress += (_, e) =>
 {
     e.Cancel = true;   // prevent immediate termination
     cts.Cancel();
-    Console.WriteLine("\n  Cancellation requested. Finishing current operation...");
+    AnsiConsole.MarkupLine("\n[yellow]Cancellation requested. Finishing current operation...[/]");
 };
 
 while (!cts.Token.IsCancellationRequested)
@@ -88,7 +88,7 @@ while (!cts.Token.IsCancellationRequested)
     await ProcessVideoAsync(videoId, serviceProvider, appSettings.Summarizer, saveTranscript, summaryMode, cts.Token);
 }
 
-Console.WriteLine("  Goodbye!");
+AnsiConsole.MarkupLine("[grey]Goodbye![/]");
 
 // ═════════════════════════════════════════════════════════════════════════════
 //  Video processing pipeline
@@ -125,7 +125,7 @@ static async Task ProcessVideoAsync(
             return;
         }
 
-        Console.WriteLine($"  {metadata.Title}");
+        AnsiConsole.MarkupLine($"  [bold]{Markup.Escape(metadata.Title)}[/]");
 
         // ── Step 2: Transcript ────────────────────────────────────────────
         ConsoleRenderer.PrintWorking("Fetching transcript");
@@ -134,15 +134,15 @@ static async Task ProcessVideoAsync(
         // Optionally show raw transcript for debugging / inspection
         if (summarizerSettings.ShowTranscript)
         {
-            Console.WriteLine();
-            Console.WriteLine("  ─── RAW TRANSCRIPT ───");
-            Console.WriteLine(transcript.Text);
-            Console.WriteLine("  ─── END TRANSCRIPT ───");
-            Console.WriteLine();
+            AnsiConsole.WriteLine();
+            AnsiConsole.Write(new Rule("RAW TRANSCRIPT").RuleStyle("grey"));
+            AnsiConsole.WriteLine(transcript.Text);
+            AnsiConsole.Write(new Rule("END TRANSCRIPT").RuleStyle("grey"));
+            AnsiConsole.WriteLine();
         }
 
-        Console.WriteLine(
-            $"  Transcript: {transcript.Source} | {transcript.WordCount:N0} words");
+        AnsiConsole.MarkupLine(
+            $"  [grey]Transcript:[/] {transcript.Source} | {transcript.WordCount:N0} words");
 
         // ── Step 2.5: Save transcript to file (if requested) ─────────────
         // (moved after summarization so we can include the summary)
@@ -190,9 +190,10 @@ static async Task ProcessVideoAsync(
     {
         ConsoleRenderer.PrintError(ex.Message);
 
-        // Print the stack trace in dim text for debugging without overwhelming
-        // normal users who will rarely see this path.
-        Console.WriteLine($"\x1b[2m{ex}\x1b[0m");
+        // Print the stack trace for debugging without overwhelming normal users
+        // who will rarely see this path.
+        AnsiConsole.WriteException(ex,
+            ExceptionFormats.ShortenPaths | ExceptionFormats.ShortenTypes);
     }
 }
 
@@ -217,11 +218,9 @@ static void ValidateSettings(AppSettings settings)
 
     if (errors.Count > 0)
     {
-        Console.ForegroundColor = ConsoleColor.Red;
-        Console.WriteLine("\nConfiguration errors:");
-        errors.ForEach(e => Console.WriteLine($"  ✗ {e}"));
-        Console.ResetColor();
-        Console.WriteLine("\nCopy appsettings.example.json → appsettings.json and fill in your keys.\n");
+        AnsiConsole.MarkupLine("\n[red]Configuration errors:[/]");
+        errors.ForEach(e => AnsiConsole.MarkupLine($"  [red]✗[/] {Markup.Escape(e)}"));
+        AnsiConsole.MarkupLine("\n[grey]Copy appsettings.example.json → appsettings.json and fill in your keys.[/]\n");
         Environment.Exit(1);
     }
 }

SummarizerService.cs

@@ -1,5 +1,6 @@
 using OpenAI;
 using OpenAI.Chat;
+using Spectre.Console;
 using YoutubeSummarizer.Configuration;
 using YoutubeSummarizer.Models;
 
@@ -189,14 +190,14 @@ public sealed class SummarizerService
         var words = transcriptText.Split(' ', StringSplitOptions.RemoveEmptyEntries);
         var chunks = SplitIntoChunks(words, _summarizerSettings.ChunkWordLimit, overlapWords: 200);
 
-        Console.WriteLine($"\n  [Chunking] Transcript split into {chunks.Count} chunks for processing...");
+        AnsiConsole.MarkupLine($"[grey]Transcript split into {chunks.Count} chunks for processing…[/]");
 
         // Map phase: summarize each chunk in sequence
         // (Parallel would be faster but could hit rate limits — sequential is safer)
         var chunkSummaries = new List<string>(chunks.Count);
         for (int i = 0; i < chunks.Count; i++)
         {
-            Console.Write($"  [Chunk {i + 1}/{chunks.Count}] Summarizing");
+            AnsiConsole.MarkupLine($"[grey][[Chunk {i + 1}/{chunks.Count}]] summarizing…[/]");
             var chunkText = string.Join(" ", chunks[i]);
             var prompt = $"This is segment {i + 1} of {chunks.Count} from the video \"{metadata.Title}\":\n\n{chunkText}";
             var summary = await CallChatCompletionAsync(chunkSystemPrompt, prompt, ct);
@@ -204,7 +205,7 @@ public sealed class SummarizerService
         }
 
         // Reduce phase: combine all chunk summaries into one coherent summary
-        Console.Write("  [Combine] Merging chunk summaries into final summary");
+        AnsiConsole.MarkupLine("[grey][[Combine]] merging chunk summaries into final summary…[/]");
         var combinedInput = string.Join("\n\n---\n\n",
             chunkSummaries.Select((s, i) => $"Segment {i + 1} summary:\n{s}"));
 
@@ -242,6 +243,10 @@ public sealed class SummarizerService
         var fullContent = new System.Text.StringBuilder();
 
         try
+        {
+            await AnsiConsole.Status()
+                .Spinner(Spinner.Known.Dots)
+                .StartAsync("Waiting for model…", async ctx =>
                 {
                     var streamingUpdates = _chatClient.CompleteChatStreamingAsync(messages, options, ct);
 
@@ -249,28 +254,19 @@ public sealed class SummarizerService
                     {
                         foreach (var part in update.ContentUpdate)
                         {
-                    if (!string.IsNullOrEmpty(part.Text))
-                    {
-                        if (fullContent.Length == 0)
-                        {
-                            // First token received!
-                            Console.Write(" (working)");
-                        }
+                            if (string.IsNullOrEmpty(part.Text)) continue;
 
                             fullContent.Append(part.Text);
-                        
-                        // Show progress: print a dot every ~50 characters of output
-                        // or just periodically. For now, let's just do a dot every update
-                        // to show it's alive.
-                        if (fullContent.Length % 20 == 0) Console.Write(".");
-                    }
+                            ctx.Status(
+                                $"Generating… {fullContent.Length:N0} chars ({sw.Elapsed.TotalSeconds:F0}s)");
                         }
                     }
+                });
         }
         finally
         {
             sw.Stop();
-            Console.WriteLine($" Done! ({sw.Elapsed.TotalSeconds:F1}s)");
+            AnsiConsole.MarkupLine($"[green]✓[/] Done in {sw.Elapsed.TotalSeconds:F1}s");
         }
 
         return fullContent.ToString();

YoutubeSummarizer.csproj

@@ -31,6 +31,7 @@
 
     <!-- Polly for resilient HTTP retry logic -->
     <PackageReference Include="Polly" Version="8.4.1" />
+    <PackageReference Include="Spectre.Console" Version="0.57.2" />
   </ItemGroup>
 
 </Project>