using NozCli.Core.Client;
using NozCli.Core.Security;
using NozCli.Repl;
using Spectre.Console;

namespace NozCli.Commands;

public class MvCommand : ICommand
{
    public string Name        => "mv";
    public string Description => "Rename a note and update all inbound links";
    public string Usage       => "mv <old-name> <new-name>";

    public async Task ExecuteAsync(string[] args, ReplContext ctx, CancellationToken ct = default)
    {
        if (args.Length < 2)
        {
            AnsiConsole.MarkupLine("[red]Usage:[/] mv <old-name> <new-name>");
            return;
        }

        // Resolve short names to full slugs
        var oldSlug = ctx.ResolveSlug(args[0]);
        var newSlug = ctx.ResolveNewSlug(args[1]);

        if (!SlugGuard.IsValid(oldSlug) || !SlugGuard.IsValid(newSlug))
        {
            AnsiConsole.MarkupLine("[red]Ungültiger Slug.[/] Nur Kleinbuchstaben, Ziffern und Bindestriche erlaubt.");
            return;
        }

        if (oldSlug == newSlug)
        {
            AnsiConsole.MarkupLine("[yellow]Quelle und Ziel sind identisch — nichts zu tun.[/]");
            return;
        }

        if (!ctx.NoteCache.Any(n => n.Slug == oldSlug))
        {
            AnsiConsole.MarkupLine($"[red]Notiz nicht gefunden:[/] {oldSlug}");
            return;
        }

        if (ctx.NoteCache.Any(n => n.Slug == newSlug))
        {
            AnsiConsole.MarkupLine($"[red]Ziel existiert bereits:[/] {newSlug}");
            return;
        }

        AnsiConsole.MarkupLine($"[dim]Umbenennen:[/] [cyan]{oldSlug}[/] → [green]{newSlug}[/]");

        NoteRenamer.Result result = default!;

        await AnsiConsole.Progress()
            .AutoClear(false)
            .HideCompleted(false)
            .StartAsync(async prog =>
        {
            var task = prog.AddTask("Umbenennen…", maxValue: 100);

            result = await NoteRenamer.ExecuteAsync(
                ctx.Api, oldSlug, newSlug,
                onProgress: msg =>
                {
                    task.Description = msg;
                    task.Increment(20);
                },
                ct: ct);

            task.Value       = 100;
            task.Description = "Fertig";
        });

        // Update local cache: swap old entry for a patched new one
        var oldEntry = ctx.NoteCache.FirstOrDefault(n => n.Slug == oldSlug);
        if (oldEntry is not null)
        {
            ctx.NoteCache.Remove(oldEntry);
            ctx.NoteCache.Add(oldEntry with { Slug = newSlug });
        }

        var linkInfo = result.LinksUpdated > 0
            ? $"  [dim]·  {result.LinksUpdated} Link(s) aktualisiert[/]"
            : "";

        AnsiConsole.MarkupLine($"[green]✓[/] {oldSlug} → {newSlug}{linkInfo}");
    }
}