@page "/tracks/mixes"
@inherits CmsMediumBrowserBase<CmsMixBrowser.MixRow>
@using DeepDrftModels.DTOs
@using DeepDrftModels.Enums
@attribute [Authorize]
@inject ILogger<CmsMixBrowser> Logger

<PageTitle>Mixes — DeepDrft CMS</PageTitle>

<MudContainer MaxWidth="MaxWidth.Large" Class="mt-8">
    <MudButton Variant="Variant.Text"
               StartIcon="@Icons.Material.Filled.ArrowBack"
               Href="/tracks/archive"
               Class="mb-4">
        Back to Release Archive
    </MudButton>

    <MudText Typo="Typo.h4" GutterBottom="true">Mixes</MudText>

    <CmsMediumTable TRow="MixRow"
                    Rows="Rows"
                    Loading="Loading"
                    ReleaseAccessor="@(row => row.Release)"
                    ThumbUrl="@(key => ThumbUrl(key))"
                    TitleHeader="Mix"
                    EmptyMessage="No mixes found.">
        <ActionContent Context="row">
            @if (row.HasWaveform)
            {
                <MudTooltip Text="Waveform generated">
                    <MudIcon Icon="@Icons.Material.Filled.CheckCircle" Color="Color.Success" Size="Size.Small" />
                </MudTooltip>
            }
            else
            {
                <MudTooltip Text="No waveform — incomplete">
                    <MudIcon Icon="@Icons.Material.Filled.Cancel" Color="Color.Warning" Size="Size.Small" />
                </MudTooltip>
            }
            <MudButton Variant="Variant.Outlined"
                       Size="Size.Small"
                       StartIcon="@Icons.Material.Filled.GraphicEq"
                       Disabled="@row.IsGenerating"
                       OnClick="@(() => GenerateWaveformAsync(row))">
                @if (row.IsGenerating)
                {
                    <MudProgressCircular Class="mr-2" Size="Size.Small" Indeterminate="true" />
                    <span>Generating…</span>
                }
                else
                {
                    <span>@(row.HasWaveform ? "Regenerate" : "Generate")</span>
                }
            </MudButton>
        </ActionContent>
    </CmsMediumTable>
</MudContainer>

@code {
    protected override ReleaseMedium Medium => ReleaseMedium.Mix;
    protected override string MediumNoun => "mixes";

    protected override MixRow ToRow(ReleaseDto release) => new()
    {
        Release = release,
        HasWaveform = !string.IsNullOrEmpty(release.MixMetadata?.WaveformEntryKey)
    };

    private async Task GenerateWaveformAsync(MixRow row)
    {
        row.IsGenerating = true;
        StateHasChanged();
        try
        {
            var result = await CmsReleaseService.GenerateMixWaveformAsync(row.Release.Id);
            if (result.Success)
            {
                // Optimistic update: the trigger succeeded, so the waveform is stored. Unlike SessionBrowser's
                // re-fetch (which retrieves the server-generated HeroImageEntryKey), there is nothing to reflect
                // back here — HasWaveform is derived from WaveformEntryKey being non-null, which we know is now set.
                row.HasWaveform = true;
                Snackbar.Add($"Generated waveform for '{row.Release.Title}'.", Severity.Success);
            }
            else
            {
                var error = result.Messages.FirstOrDefault()?.Message ?? "Unknown error";
                Snackbar.Add($"Waveform generation failed for '{row.Release.Title}': {error}", Severity.Error);
            }
        }
        catch (Exception ex)
        {
            Logger.LogError(ex, "Waveform generation failed for release {ReleaseId}", row.Release.Id);
            Snackbar.Add($"Waveform generation failed for '{row.Release.Title}' — please try again.", Severity.Error);
        }
        finally
        {
            row.IsGenerating = false;
            StateHasChanged();
        }
    }

    public sealed class MixRow
    {
        public required ReleaseDto Release { get; set; }
        public bool HasWaveform { get; set; }
        public bool IsGenerating { get; set; }
    }
}