@using DeepDrftPublic.Client.Services
@implements IDisposable

@* Hero-right panel (owns the navy backdrop + clipping, formerly Home.razor's .hero-right wrapper). *@
<div class="now-playing-panel">
    @* Full-bleed waveform background. The visualizer mounts with Fill="true" (position:absolute; inset:0),
       so .np-visualizer-bg is the positioned, sized ancestor that lets the lava fill the whole hero-right
       panel. Driven by the live cascaded player — keyed on the current track via ReleaseEntryKey/TrackId/
       TrackEntryKey so it scrolls to the real signal and sits at-rest when nothing plays. Read-only: the
       background visualizes, it never seeks. Sits behind the rings + content (z-order via stacking below). *@
    <div class="np-visualizer-bg">
        <WaveformVisualizer Fill="true"
                            ReleaseEntryKey="@(Player?.CurrentTrack?.Release?.EntryKey ?? string.Empty)"
                            TrackId="@Player?.CurrentTrack?.Id"
                            TrackEntryKey="@Player?.CurrentTrack?.EntryKey" />
    </div>

    @* The lava-lamp trigger lands in the panel's top-right corner (full parity, §8e). Above the canvas
       and pointer-enabled so the icon is clickable even though the visualizer layer is
       pointer-events:none. The panel itself opens screen-centered (Phase 15 §4 — no per-host anchor),
       so only the icon size is host-specific now. *@
    <div class="np-visualizer-controls">
        <WaveformVisualizerControlPopover IconSize="Size.Small" />
    </div>

    @* Pulsing rings *@
    <div class="circle-deco"></div>
    <div class="circle-deco"></div>
    <div class="circle-deco"></div>

    <div class="now-playing-content">
        <NowPlayingCard />

        @* Stat row — live aggregate figures (Cut track count + type breakdown, Mix sets + runtime);
           the Plays card is a static placeholder pending real play tracking. *@
        <NowPlayingStats />
    </div>
</div>


@code {
    [CascadingParameter] public IStreamingPlayerService? Player { get; set; }

    private IStreamingPlayerService? _subscribedPlayer;

    protected override void OnParametersSet()
    {
        if (Player != null && !ReferenceEquals(Player, _subscribedPlayer))
        {
            if (_subscribedPlayer != null)
                _subscribedPlayer.StateChanged -= OnPlayerStateChanged;

            Player.StateChanged += OnPlayerStateChanged;
            _subscribedPlayer = Player;
        }
    }

    private void OnPlayerStateChanged() => InvokeAsync(StateHasChanged);

    public void Dispose()
    {
        if (_subscribedPlayer != null)
        {
            _subscribedPlayer.StateChanged -= OnPlayerStateChanged;
            _subscribedPlayer = null;
        }
    }
}