@namespace DeepDrftPublic.Client.Controls

@* The single release-card grid for every browse surface (Sessions, Mixes, Cuts, Archive). Cards
   open a detail page; how a card computes its href is the only real divergence across surfaces, so
   the parent supplies it one of two ways:
     - DetailRoute (the simple default): every card links /{DetailRoute}/{entryKey} (Sessions, Mixes).
     - HrefResolver (per-card): each card links HrefResolver(release), so Archive routes each card by
       its own medium through the one ReleaseRoutes table, and Cuts routes to /cuts/{entryKey}.
   HrefResolver wins when both are supplied. The card subtitle defaults to the artist; SubtitleResolver
   overrides it (Cuts shows a track count instead). Fully controlled by the parent: loading and item
   state are passed in. *@

<div>
    <MudContainer MaxWidth="MaxWidth.Large" Class="release-gallery-container">
        @if (Loading)
        {
            <MudGrid Spacing="6" Justify="Justify.Center">
                @foreach (var _ in Enumerable.Range(0, 8))
                {
                    <MudItem xs="12" sm="6" md="4" lg="3" xl="3">
                        <div class="release-card-center">
                            <MudSkeleton Width="200px" Height="200px" SkeletonType="SkeletonType.Rectangle"/>
                        </div>
                    </MudItem>
                }
            </MudGrid>
        }
        else if (Releases.Count == 0)
        {
            <div class="release-gallery-empty">
                <MudText Typo="Typo.h6">@EmptyMessage</MudText>
            </div>
        }
        else
        {
            <MudGrid Spacing="6" Justify="Justify.Center">
                @foreach (var release in Releases)
                {
                    <MudItem xs="12" sm="6" md="4" lg="3" xl="3">
                        <div class="release-card-center">
                            <a href="@CardHref(release)" class="release-card-link">
                                <div class="release-card">
                                    @if (!string.IsNullOrEmpty(release.ImagePath))
                                    {
                                        <div class="release-card-cover"
                                             style="background-image: url('api/image/@Uri.EscapeDataString(release.ImagePath)');">
                                        </div>
                                    }
                                    else
                                    {
                                        <div class="release-card-cover release-card-cover--fallback"></div>
                                    }

                                    <div class="release-card-body">
                                        <MudText Typo="Typo.subtitle1" Class="release-card-title text-truncate">
                                            @release.Title
                                        </MudText>
                                        <MudText Typo="Typo.caption" Class="release-card-artist text-truncate">
                                            @(SubtitleResolver?.Invoke(release) ?? release.Artist)
                                        </MudText>
                                    </div>
                                </div>
                            </a>
                        </div>
                    </MudItem>
                }
            </MudGrid>
        }
    </MudContainer>
</div>

@code {
    [Parameter] public required IReadOnlyList<DeepDrftModels.DTOs.ReleaseDto> Releases { get; set; }
    [Parameter] public bool Loading { get; set; }

    /// <summary>
    /// Route segment for a card's detail page; a card links to /{DetailRoute}/{entryKey}. The simple
    /// fixed-route default used by Sessions/Mixes. Ignored when <see cref="HrefResolver"/> is supplied.
    /// </summary>
    [Parameter] public string? DetailRoute { get; set; }

    /// <summary>
    /// Per-card href resolver. When supplied, a card links to its result instead of the
    /// <see cref="DetailRoute"/>-based href, letting Archive route each card by its own medium and
    /// Cuts route to /cuts/{entryKey} (both via <c>ReleaseRoutes.DetailHref</c>).
    /// </summary>
    [Parameter] public Func<DeepDrftModels.DTOs.ReleaseDto, string>? HrefResolver { get; set; }

    /// <summary>
    /// Optional override for a card's subtitle line (defaults to the release artist). Cuts pass a
    /// track-count label here.
    /// </summary>
    [Parameter] public Func<DeepDrftModels.DTOs.ReleaseDto, string>? SubtitleResolver { get; set; }

    [Parameter] public string EmptyMessage { get; set; } = "Nothing here yet";

    private string CardHref(DeepDrftModels.DTOs.ReleaseDto release)
        => HrefResolver?.Invoke(release) ?? $"/{DetailRoute}/{release.EntryKey}";
}