using System.Management.Automation;

namespace Noz.PowerShell.Cmdlets;

[Cmdlet(VerbsDiagnostic.Measure, "NozGarden")]
[OutputType(typeof(NozGardenStats))]
public sealed class MeasureNozGardenCmdlet : NozCmdletBase
{
    protected override void ProcessRecord()
    {
        var notesTask = Api.GetNotesAsync();
        var graphTask = Api.GetGraphAsync();

        var notes = Run(notesTask);
        var graph = Run(graphTask);

        var targets = new HashSet<string>(graph.Edges.Select(e => e.Target));
        var orphans = notes.Count(n => !targets.Contains(n.Slug));

        var byTopic = notes
            .GroupBy(n => n.Topic ?? "—")
            .ToDictionary(g => g.Key, g => g.Count());

        var byLang = notes
            .GroupBy(n => n.Lang)
            .ToDictionary(g => g.Key, g => g.Count());

        WriteObject(new NozGardenStats
        {
            TotalNotes     = notes.Count,
            SeedCount      = notes.Count(n => n.Status == "seed"),
            BuddingCount   = notes.Count(n => n.Status == "budding"),
            EvergreenCount = notes.Count(n => n.Status == "evergreen"),
            TopicCount     = byTopic.Count,
            LinkCount      = graph.Edges.Count,
            OrphanCount    = orphans,
            NotesByTopic   = byTopic,
            NotesByLang    = byLang,
        });
    }
}