@page "/media/tv/shows"
@using ErsatzTV.Application.MediaCards
@using ErsatzTV.Application.MediaCards.Queries
@using ErsatzTV.Application.MediaCollections
@using ErsatzTV.Application.MediaCollections.Commands
@using Unit = LanguageExt.Unit
@inject ILogger<TelevisionShowList> Logger
@inject ISnackbar Snackbar
@inject IMediator Mediator
@inject IDialogService Dialog
@inject ChannelWriter<IBackgroundServiceRequest> Channel

<MudContainer MaxWidth="MaxWidth.ExtraLarge" Class="pt-8">
    <MudContainer MaxWidth="MaxWidth.Small" Class="mb-6" Style="max-width: 300px">
        <MudPaper Style="align-items: center; display: flex; justify-content: center;">
            <MudIconButton Icon="@Icons.Material.Outlined.ChevronLeft"
                           OnClick="@(() => PrevPage())"
                           Disabled="@(_pageNumber <= 1)">
            </MudIconButton>
            <MudText Style="flex-grow: 1"
                     Align="Align.Center">
                @Math.Min((_pageNumber - 1) * _pageSize + 1, _data.Count)-@Math.Min(_data.Count, _pageNumber * _pageSize) of @_data.Count
            </MudText>
            <MudIconButton Icon="@Icons.Material.Outlined.ChevronRight"
                           OnClick="@(() => NextPage())" Disabled="@(_pageNumber * _pageSize >= _data.Count)">
            </MudIconButton>
        </MudPaper>
    </MudContainer>

    <MudContainer MaxWidth="MaxWidth.False" Class="media-card-grid">
        @foreach (TelevisionShowCardViewModel card in _data.Cards.OrderBy(s => s.SortTitle))
        {
            <MediaCard Data="@card"
                       Link="@($"/media/tv/shows/{card.TelevisionShowId}")"
                       AddToCollectionClicked="@AddToCollection"/>
        }
    </MudContainer>
</MudContainer>

@code {
    private int _pageSize => 100;
    private int _pageNumber = 1;

    private TelevisionShowCardResultsViewModel _data;

    protected override Task OnParametersSetAsync() => RefreshData();

    private async Task RefreshData() =>
        _data = await Mediator.Send(new GetTelevisionShowCards(_pageNumber, _pageSize));

    private async Task PrevPage()
    {
        _pageNumber -= 1;
        await RefreshData();
    }

    private async Task NextPage()
    {
        _pageNumber += 1;
        await RefreshData();
    }

    private async Task AddToCollection(MediaCardViewModel card)
    {
        if (card is TelevisionShowCardViewModel show)
        {
            var parameters = new DialogParameters { { "EntityType", "show" }, { "EntityName", show.Title } };
            var options = new DialogOptions { CloseButton = true, MaxWidth = MaxWidth.ExtraSmall };

            IDialogReference dialog = Dialog.Show<AddToCollectionDialog>("Add To Collection", parameters, options);
            DialogResult result = await dialog.Result;
            if (!result.Cancelled && result.Data is MediaCollectionViewModel collection)
            {
                var request = new AddShowToCollection(collection.Id, show.TelevisionShowId);
                Either<BaseError, Unit> addResult = await Mediator.Send(request);
                addResult.Match(
                    Left: error =>
                    {
                        Snackbar.Add($"Unexpected error adding show to collection: {error.Value}");
                        Logger.LogError("Unexpected error adding show to collection: {Error}", error.Value);
                    },
                    Right: _ => Snackbar.Add($"Added {show.Title} to collection {collection.Name}", Severity.Success));
            }
        }
    }

}