@page "/tracks"
@using System.Net
@using DeepDrftManager.Services
@attribute [Authorize]
@inject ICmsTrackService CmsTrackService
@inject IDialogService DialogService
@inject ISnackbar Snackbar
@inject ILogger<TrackList> Logger

<PageTitle>Tracks — DeepDrft CMS</PageTitle>

<MudContainer MaxWidth="MaxWidth.Large" Class="mt-8">
    <MudStack Row="true" AlignItems="AlignItems.Center" Justify="Justify.SpaceBetween" Class="mb-4">
        <MudText Typo="Typo.h3">Tracks</MudText>
        <MudStack Row="true" Spacing="2">
            <MudButton Variant="Variant.Outlined"
                       Color="Color.Primary"
                       StartIcon="@Icons.Material.Filled.GraphicEq"
                       Href="/tracks/preprocessing">
                Waveform Pre-Processing
            </MudButton>
            <MudButton Variant="Variant.Filled"
                       Color="Color.Primary"
                       StartIcon="@Icons.Material.Filled.Add"
                       Href="/tracks/new">
                Add Track
            </MudButton>
        </MudStack>
    </MudStack>

    <MudTable T="TrackDto"
              @ref="_table"
              ServerData="LoadServerData"
              Hover="true"
              Striped="true"
              Dense="true"
              Bordered="false"
              FixedHeader="true"
              RowsPerPage="20"
              AllowUnsorted="false">
        <NoRecordsContent>
            <MudText Typo="Typo.body1">No tracks found.</MudText>
        </NoRecordsContent>
        <LoadingContent>
            <MudText Typo="Typo.body1">Loading tracks…</MudText>
        </LoadingContent>
        <HeaderContent>
            <MudTh><MudTableSortLabel SortLabel="TrackName" T="TrackDto" InitialDirection="SortDirection.Ascending">Track Name</MudTableSortLabel></MudTh>
            <MudTh><MudTableSortLabel SortLabel="Artist" T="TrackDto">Artist</MudTableSortLabel></MudTh>
            <MudTh><MudTableSortLabel SortLabel="Album" T="TrackDto">Album</MudTableSortLabel></MudTh>
            <MudTh><MudTableSortLabel SortLabel="Genre" T="TrackDto">Genre</MudTableSortLabel></MudTh>
            <MudTh><MudTableSortLabel SortLabel="ReleaseDate" T="TrackDto">Release Date</MudTableSortLabel></MudTh>
            <MudTh>Entry Key</MudTh>
            <MudTh Style="width: 1%; white-space: nowrap;">Actions</MudTh>
        </HeaderContent>
        <RowTemplate>
            <MudTd DataLabel="Track Name">@context.TrackName</MudTd>
            <MudTd DataLabel="Artist">@context.Artist</MudTd>
            <MudTd DataLabel="Album">@(context.Album ?? "—")</MudTd>
            <MudTd DataLabel="Genre">@(context.Genre ?? "—")</MudTd>
            <MudTd DataLabel="Release Date">@(context.ReleaseDate?.ToString("yyyy-MM-dd") ?? "—")</MudTd>
            <MudTd DataLabel="Entry Key"><MudText Typo="Typo.caption" Style="font-family: monospace;">@context.EntryKey</MudText></MudTd>
            <MudTd DataLabel="Actions">
                <MudTooltip Text="Edit">
                    <MudIconButton Icon="@Icons.Material.Filled.Edit"
                                   Size="Size.Small"
                                   Color="Color.Primary"
                                   Href="@($"/tracks/{context.Id}")" />
                </MudTooltip>
                <MudTooltip Text="Delete">
                    <MudIconButton Icon="@Icons.Material.Filled.Delete"
                                   Size="Size.Small"
                                   Color="Color.Error"
                                   OnClick="@(() => ConfirmAndDelete(context))" />
                </MudTooltip>
            </MudTd>
        </RowTemplate>
        <PagerContent>
            <MudTablePager PageSizeOptions="new[] { 10, 20, 50 }" />
        </PagerContent>
    </MudTable>
</MudContainer>

@code {
    private MudTable<TrackDto>? _table;

    private async Task<TableData<TrackDto>> LoadServerData(TableState state, CancellationToken cancellationToken)
    {
        var pageNumber = state.Page + 1; // MudTable is 0-based, service is 1-based.
        var sortColumn = string.IsNullOrEmpty(state.SortLabel) ? "TrackName" : state.SortLabel;
        var sortDescending = state.SortDirection == SortDirection.Descending;

        var result = await CmsTrackService.GetPagedAsync(pageNumber, state.PageSize, sortColumn, sortDescending, cancellationToken);

        if (!result.Success || result.Value is null)
        {
            var errorText = result.Messages.FirstOrDefault()?.Message ?? "Unknown error";
            Snackbar.Add($"Failed to load tracks: {errorText}", Severity.Error);
            return new TableData<TrackDto> { Items = Array.Empty<TrackDto>(), TotalItems = 0 };
        }

        var page = result.Value;
        return new TableData<TrackDto>
        {
            Items = page.Items,
            TotalItems = page.TotalCount
        };
    }

    private async Task ConfirmAndDelete(TrackDto track)
    {
        var confirmed = await DialogService.ShowMessageBox(
            title: "Delete track",
            markupMessage: new MarkupString($"Delete <strong>{WebUtility.HtmlEncode(track.TrackName)}</strong> by {WebUtility.HtmlEncode(track.Artist)}? This removes both the metadata row and the underlying audio entry."),
            yesText: "Delete",
            cancelText: "Cancel");

        if (confirmed != true) return;

        try
        {
            var result = await CmsTrackService.DeleteTrackAsync(track.Id);
            if (result.Success)
            {
                Snackbar.Add($"Deleted '{track.TrackName}'.", Severity.Success);
                if (_table is not null) await _table.ReloadServerData();
            }
            else
            {
                var error = result.Messages.FirstOrDefault()?.Message ?? "Unknown error";
                Snackbar.Add($"Delete failed: {error}", Severity.Error);
            }
        }
        catch (Exception ex)
        {
            Logger.LogError(ex, "Delete failed for track {TrackId}", track.Id);
            Snackbar.Add("Delete failed — please try again.", Severity.Error);
        }
    }
}