@page "/live"
@using Marathon.UI.Pages.Shared
@implements IDisposable
@inject IStringLocalizer<SharedResource> L
@inject IEventBrowsingService Browsing
@inject EventBrowsingState BrowsingState
@inject NavigationManager Nav
@inject IOptionsMonitor<ScrapingSettingsForm> ScrapingMonitor

<PageTitle>@L["App.Title"] · @L["Nav.Live"]</PageTitle>

<EventListShell
    Surface="@L["Nav.Section.Analysis"]"
    Title="@L["Live.Title"]"
    Lede="@L["Live.Lede"]"
    Loader="@LoadAsync"
    Filter="@BrowsingState.Live"
    OnFilterChanged="@HandleFilterChanged"
    OnRowClicked="@HandleRowClicked"
    AvailableSports="_availableSports"
    AvailableCountries="_availableCountries"
    LiveMode="true"
    AutoRefreshSeconds="@_refreshSeconds" />

@code {
    private IReadOnlyList<int> _availableSports = Array.Empty<int>();
    private IReadOnlyList<string> _availableCountries = Array.Empty<string>();
    private int _refreshSeconds = 30;
    private IDisposable? _scrapingChange;

    protected override async Task OnInitializedAsync()
    {
        _refreshSeconds = Math.Max(5, ScrapingMonitor.CurrentValue.PollingIntervalSeconds);
        _scrapingChange = ScrapingMonitor.OnChange(opts =>
        {
            _refreshSeconds = Math.Max(5, opts.PollingIntervalSeconds);
            InvokeAsync(StateHasChanged);
        });

        try
        {
            _availableSports = await Browsing.ListKnownSportCodesAsync(CancellationToken.None);
            _availableCountries = await Browsing.ListKnownCountryCodesAsync(CancellationToken.None);
        }
        catch
        {
            // Tolerate empty data sources during early phases.
        }
    }

    private Task<IReadOnlyList<EventListItem>> LoadAsync(EventFilter filter, CancellationToken ct)
        => Browsing.ListLiveAsync(filter, ct);

    private void HandleFilterChanged(EventBrowsingState.PageFilter next)
        => BrowsingState.UpdateLive(next);

    private void HandleRowClicked(EventListItem row)
        => Nav.NavigateTo($"/events/{Uri.EscapeDataString(row.Id.Value)}");

    public void Dispose() => _scrapingChange?.Dispose();
}