using System.Collections.Specialized;
using ClaudeDo.Ui.Services;
using CommunityToolkit.Mvvm.ComponentModel;

namespace ClaudeDo.Ui.ViewModels;

public partial class StatusBarViewModel : ViewModelBase
{
    private readonly WorkerClient _worker;

    [ObservableProperty] private string _connectionStatus = "Offline";
    [ObservableProperty] private string _activeTasksSummary = "";
    [ObservableProperty] private string _statusMessage = "";

    public StatusBarViewModel(WorkerClient worker)
    {
        _worker = worker;

        worker.PropertyChanged += (_, e) =>
        {
            if (e.PropertyName == nameof(WorkerClient.IsConnected) ||
                e.PropertyName == nameof(WorkerClient.IsReconnecting))
            {
                ConnectionStatus = worker.IsConnected ? "Online"
                    : worker.IsReconnecting ? "Connecting..."
                    : "Offline";
            }
        };

        worker.ActiveTasks.CollectionChanged += OnActiveTasksChanged;
        RefreshActiveSummary();
    }

    private void OnActiveTasksChanged(object? sender, NotifyCollectionChangedEventArgs e) =>
        RefreshActiveSummary();

    private void RefreshActiveSummary()
    {
        if (_worker.ActiveTasks.Count == 0)
        {
            ActiveTasksSummary = "";
            return;
        }

        var parts = _worker.ActiveTasks
            .Select(t => $"{t.Slot}: {Shorten(t.TaskId)}")
            .ToList();
        ActiveTasksSummary = string.Join("  |  ", parts);
    }

    private static string Shorten(string id) =>
        id.Length > 8 ? id[..8] : id;

    public void ShowMessage(string msg) => StatusMessage = msg;
}