@namespace CitySim.DesignSystem
@using CitySim.Cards
@using CitySim.Match
@using Sandbox.UI
@inherits Panel

<root class="plotter-card-reference @CssClass @(IsTag ? "tag" : "target")">@(GameText.Resolve(Label))</root>
@code {
    [Parameter] public CityGame City { get; set; }
    [Parameter] public string Label { get; set; }
    [Parameter] public string CssClass { get; set; }
    [Parameter] public Tag Tag { get; set; }
    [Parameter] public IReadOnlyList<InteractionTarget> Targets { get; set; }
    [Parameter] public Action<Tag> ReferenceChanged { get; set; }
    [Parameter] public Action<IReadOnlyList<InteractionTarget>> TargetsChanged { get; set; }
    bool IsTag => Tag != Tag.None;
    bool CanHighlight => IsTag || (Targets != null && Targets.Any(t => t.Kind != InteractionKind.None));
    protected override void OnParametersSet() { base.OnParametersSet(); AcceptsFocus = CanHighlight; }
    void Show() {
        if (!CanHighlight) return;
        if (IsTag) { City?.HighlightReferenceTag(this, Tag); ReferenceChanged?.Invoke(Tag); }
        else { City?.HighlightInteractions(this, Targets, Label); TargetsChanged?.Invoke(Targets); }
    }
    void Clear() {
        City?.ClearInteractionHighlight(this);
        if (IsTag) ReferenceChanged?.Invoke(Tag.None);
        else if (CanHighlight) TargetsChanged?.Invoke(Array.Empty<InteractionTarget>());
    }
    protected override void OnMouseOver(MousePanelEvent e) { base.OnMouseOver(e); Show(); }
    protected override void OnMouseOut(MousePanelEvent e) { base.OnMouseOut(e); if (!HasFocus) Clear(); }
    protected override void OnFocus(PanelEvent e) { base.OnFocus(e); Show(); }
    protected override void OnBlur(PanelEvent e) { base.OnBlur(e); if (!HasHovered) Clear(); }
    public override void OnDeleted() { Clear(); base.OnDeleted(); }
    protected override int BuildHash() => HashCode.Combine(GameText.LanguageCode, Label, Tag, CssClass, City, Targets, ReferenceChanged, TargetsChanged);
}