@using Sandbox;
@using Sandbox.UI;
@using System;
@using HC3.UI;

@inherits SingletonWindow<AnimalsPanel>
@namespace HC3

<root class="column gap">
    <div class="row groups no-shrink">
        <button class="@(CurrentGroup == "Animal" ? "selected" : "") square-button" tooltip="Animals" onclick=@(() => SetGroup("Animal"))>
            <img src="textures/hud/pets.png" />
        </button>
    </div>

    <div class="row grow">
        <column class="tree">
            @foreach ( var group in IPlacementObject.GetAllPrefabs( CurrentGroup )
                                                    .GroupBy( x => x.Group.SecondaryGroup )
                                                    .OrderBy( g => g.Key ) )
            {
                var isSelected = group.Key == CurrentSecondaryGroup;
                <button class="tree-root @(isSelected ? "selected" : "")"
                        onclick=@(() => SetSecondaryGroup( group.Key ))> @(group.Key) (@group.Count()) </button>
            }
        </column>

        <div class="window-container">
            <div class="items">
                @foreach ( var item in Items.OrderBy( x => x.GetOrder() ) )
                {
                    <CatalogItemPanel Item=@item />
                }
            </div>
        </div>
    </div>
</root>

@code
{
    public override string Title => $"{CurrentGroup} Catalog";
    public override string Icon => "bug";

    public string CurrentGroup { get; set; } = "Animal";

    public string? CurrentSecondaryGroup { get; set; } = null;

    public IEnumerable<IPlacementObject> Items =>
        IPlacementObject.GetAllPrefabs(CurrentGroup)
            .Where(x => string.IsNullOrEmpty(CurrentSecondaryGroup) || x.Group.SecondaryGroup == CurrentSecondaryGroup);

    public void SetGroup(string group)
    {
        CurrentGroup = group;
        CurrentSecondaryGroup = null; // reset sub-group on group switch
        StateHasChanged();
    }

    public void SetSecondaryGroup( string group )
    {
        CurrentSecondaryGroup = group;
        StateHasChanged();
    }

    protected override int BuildHash() => System.HashCode.Combine( base.BuildHash(), BuildingPlacer.Instance?.IsDestroying );

    public override void Tick()
    {
        SetClass( "visible", IsVisible );
    }
}