@page "/media/libraries/local/{Id:int}/add"
@using ErsatzTV.Application.Libraries
@using ErsatzTV.Application.MediaSources
@implements IDisposable
@inject NavigationManager NavigationManager
@inject ILogger<LocalLibraryPathEditor> Logger
@inject ISnackbar Snackbar
@inject IMediator Mediator
@inject IEntityLocker Locker
@inject ChannelWriter<IScannerBackgroundServiceRequest> ScannerWorkerChannel

<MudContainer MaxWidth="MaxWidth.ExtraLarge" Class="pt-8">
    <MudText Typo="Typo.h4" Class="mb-4">@_library.Name - Add Local Library Path</MudText>
    <div style="max-width: 400px;">
        <EditForm EditContext="_editContext" OnSubmit="@HandleSubmitAsync">
            <FluentValidationValidator/>
            <MudCard>
                <MudCardContent>
                    <MudTextField T="string" Label="Media Kind" Disabled="true" Value="@(Enum.GetName(typeof(LibraryMediaKind), _library.MediaKind))"/>
                    @* TODO: replace this with a folder picker *@
                    <MudTextField Label="Path" @bind-Value="_model.Path" For="@(() => _model.Path)"/>
                </MudCardContent>
                <MudCardActions>
                    <MudButton ButtonType="ButtonType.Submit" Variant="Variant.Filled" Color="Color.Primary" Class="ml-auto">
                        Add Local Library Path
                    </MudButton>
                </MudCardActions>
            </MudCard>
        </EditForm>
    </div>
</MudContainer>

@code {
    private readonly CancellationTokenSource _cts = new();

    [Parameter]
    public int Id { get; set; }

    private readonly LocalLibraryPathEditViewModel _model = new();
    private EditContext _editContext;
    private ValidationMessageStore _messageStore;

    private LocalLibraryViewModel _library;

    public void Dispose()
    {
        _cts.Cancel();
        _cts.Dispose();
    }

    protected override async Task OnParametersSetAsync()
    {
        Option<LocalLibraryViewModel> maybeLibrary = await Mediator.Send(new GetLocalLibraryById(Id), _cts.Token);
        maybeLibrary.Match(
            library => _library = library,
            () => NavigationManager.NavigateTo("404"));
    }

    protected override void OnInitialized()
    {
        _editContext = new EditContext(_model);
        _messageStore = new ValidationMessageStore(_editContext);
    }

    private async Task HandleSubmitAsync()
    {
        _messageStore.Clear();
        if (_editContext.Validate())
        {
            var command = new CreateLocalLibraryPath(_library.Id, _model.Path);
            Either<BaseError, LocalLibraryPathViewModel> result = await Mediator.Send(command, _cts.Token);
            await result.Match(
                Left: error =>
                {
                    Snackbar.Add(error.Value, Severity.Error);
                    Logger.LogError("Unexpected error saving local library path: {Error}", error.Value);
                    return Task.CompletedTask;
                },
                Right: async _ =>
                {
                    if (Locker.LockLibrary(_library.Id))
                    {
                        await ScannerWorkerChannel.WriteAsync(new ScanLocalLibraryIfNeeded(_library.Id), _cts.Token);
                        NavigationManager.NavigateTo("media/libraries");
                    }
                });
        }
    }


}