@page "/schedules/{Id:int}"
@page "/schedules/add"
@using ErsatzTV.Application.ProgramSchedules
@using ErsatzTV.Application.ProgramSchedules.Queries
@inject NavigationManager NavigationManager
@inject ILogger<ScheduleEditor> Logger
@inject ISnackbar Snackbar
@inject IMediator Mediator

<div style="max-width: 400px;">
    <MudText Typo="Typo.h4" Class="mb-4">@(IsEdit ? "Edit Schedule" : "Add Schedule")</MudText>

    <EditForm EditContext="_editContext" OnSubmit="@HandleSubmitAsync">
        <FluentValidator/>
        <MudCard>
            <MudCardContent>
                <MudTextField Label="Name" @bind-Value="_model.Name" For="@(() => _model.Name)"/>
                <MudSelect Class="mt-3" Label="Collection Playback Order" @bind-Value="_model.MediaCollectionPlaybackOrder" For="@(() => _model.MediaCollectionPlaybackOrder)">
                    @foreach (PlaybackOrder playbackOrder in Enum.GetValues<PlaybackOrder>())
                    {
                        <MudSelectItem Value="@playbackOrder">@playbackOrder</MudSelectItem>
                    }
                </MudSelect>
            </MudCardContent>
            <MudCardActions>
                <MudButton ButtonType="ButtonType.Submit" Variant="Variant.Filled" Color="Color.Primary">
                    @(IsEdit ? "Save Changes" : "Add Schedule")
                </MudButton>
            </MudCardActions>
        </MudCard>
    </EditForm>
</div>

@code {

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

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

    protected override async Task OnParametersSetAsync()
    {
        if (IsEdit)
        {
            Option<ProgramScheduleViewModel> maybeProgramSchedule = await Mediator.Send(new GetProgramScheduleById(Id));
            maybeProgramSchedule.Match(
                viewModel =>
                {
                    _model.Id = viewModel.Id;
                    _model.Name = viewModel.Name;
                    _model.MediaCollectionPlaybackOrder = viewModel.MediaCollectionPlaybackOrder;
                },
                () => NavigationManager.NavigateTo("404"));
        }
        else
        {
            _model.Name = "New Schedule";
            _model.MediaCollectionPlaybackOrder = PlaybackOrder.Shuffle;
        }
    }

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

    private bool IsEdit => Id > 0;

    private async Task HandleSubmitAsync()
    {
        _messageStore.Clear();
        if (_editContext.Validate())
        {
            Seq<BaseError> errorMessage = IsEdit ?
                (await Mediator.Send(_model.ToUpdate())).LeftToSeq() :
                (await Mediator.Send(_model.ToCreate())).LeftToSeq();

            errorMessage.HeadOrNone().Match(
                error =>
                {
                    Snackbar.Add(error.Value);
                    Logger.LogError("Unexpected error saving schedule: {Error}", error.Value);
                },
                () => NavigationManager.NavigateTo("/schedules"));
        }
    }

}