using Microsoft.Extensions.AI;
using Spectre.Console;

namespace AnchorCli.Commands;

internal class CompactCommand(ContextCompactor compactor, List<ChatMessage> history) : ICommand
{
    public string Name => "compact";
    public string Description => "Manually compact conversation history via LLM summarization";

    public async Task ExecuteAsync(string[] args, CancellationToken ct)
    {
        if (history.Count < 5)
        {
            AnsiConsole.MarkupLine("[dim grey]Nothing to compact (too few messages).[/]");
            return;
        }

        AnsiConsole.MarkupLine("[yellow]⚠ Manually compacting conversation history...[/]");

        bool compacted = await AnsiConsole.Status()
            .Spinner(Spinner.Known.BouncingBar)
            .SpinnerStyle(Style.Parse("yellow"))
            .StartAsync("Compacting context...", async ctx =>
                await compactor.TryCompactAsync(history, ct));

        if (compacted)
        {
            AnsiConsole.MarkupLine(
                $"[green]✓ Context compacted ({history.Count} messages remaining)[/]");
        }
        else
        {
            AnsiConsole.MarkupLine(
                "[dim grey]  (compaction skipped — not enough history to compress)[/]");
        }
    }
}