@if (Parent.PersistAllTabs || IsActive)

@*
 *                                dbMango
 *
 * Copyright 2025 Deutsche Bank AG
 * SPDX-License-Identifier: Apache-2.0
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *@
{
    <div class="tab-page @PageClass">
        @ChildContent
    </div>
}

@code {
    [CascadingParameter] private TabControl Parent { get; set; } = null!;

    [Parameter]
    public RenderFragment? ChildContent { get; set; }

    [Parameter] public string Text { get; set; } = "Tab";
    [Parameter] public bool IsSelectable { get; set; } = true;

    private string PageClass => IsActive ? "" : "d-none";

    private bool IsActive => Parent.ActivePage == Text;

    protected override void OnInitialized()
    {
        if (Parent == null)
            throw new ArgumentNullException(nameof(Parent), "TabPage must exist within a TabControl");

        base.OnInitialized();
        Parent.AddPage(this);
    }
}