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

<MudForm @ref="_form" @bind-IsValid="@_success" Style="max-height: 100%">
    <MudPaper Square="true" Style="display: flex; height: 64px; min-height: 64px; width: 100%; z-index: 100; align-items: center">
        <MudButton Variant="Variant.Filled" Color="Color.Primary" Class="ml-6" OnClick="HandleSubmitAsync" StartIcon="@(IsEdit ? Icons.Material.Filled.Save : Icons.Material.Filled.Add)">@(IsEdit ? "Save Schedule" : "Add Schedule")</MudButton>
    </MudPaper>
    <div class="d-flex flex-column" style="height: 100vh; overflow-x: auto">
        <MudContainer MaxWidth="MaxWidth.ExtraLarge" Class="pt-8">
            <MudText Typo="Typo.h5" Class="mb-2">Schedule</MudText>
            <MudDivider Class="mb-6"/>
            <MudStack Row="true" Breakpoint="Breakpoint.SmAndDown" Class="form-field-stack gap-md-8 mb-5">
                <div class="d-flex">
                    <MudText>Name</MudText>
                </div>
                <MudTextField @bind-Value="_model.Name" For="@(() => _model.Name)" Required="true" RequiredError="Schedule name is required!"/>
            </MudStack>
            <MudStack Row="true" Breakpoint="Breakpoint.SmAndDown" Class="form-field-stack gap-md-8 mb-5">
                <div class="d-flex">
                    <MudText>Keep Multi-Part Episodes Together</MudText>
                </div>
                <MudCheckBox @bind-Value="@_model.KeepMultiPartEpisodesTogether" For="@(() => _model.KeepMultiPartEpisodesTogether)" Dense="true">
                    <MudText Typo="Typo.caption" Style="font-weight: normal">Group multi-part episodes when shuffling</MudText>
                </MudCheckBox>
            </MudStack>
            <MudStack Row="true" Breakpoint="Breakpoint.SmAndDown" Class="form-field-stack gap-md-8 mb-5">
                <div class="d-flex">
                    <MudText>Treat Collections As Shows</MudText>
                </div>
                <MudCheckBox @bind-Value="@_model.TreatCollectionsAsShows"
                             Disabled="@(_model.KeepMultiPartEpisodesTogether == false)"
                             For="@(() => _model.TreatCollectionsAsShows)" Dense="true">
                    <MudText Typo="Typo.caption" Style="font-weight: normal">This is useful for multi-part crossover episodes</MudText>
                </MudCheckBox>
            </MudStack>
            <MudStack Row="true" Breakpoint="Breakpoint.SmAndDown" Class="form-field-stack gap-md-8 mb-5">
                <div class="d-flex">
                    <MudText>Shuffle Schedule Items</MudText>
                </div>
                <MudCheckBox @bind-Value="@_model.ShuffleScheduleItems" For="@(() => _model.ShuffleScheduleItems)" Dense="true">
                    <MudText Typo="Typo.caption" Style="font-weight: normal">Note: this disables fixed start times and flood mode</MudText>
                </MudCheckBox>
            </MudStack>
            <MudStack Row="true" Breakpoint="Breakpoint.SmAndDown" Class="form-field-stack gap-md-8 mb-5">
                <div class="d-flex">
                    <MudText>Random Start Point</MudText>
                </div>
                <MudCheckBox @bind-Value="@_model.RandomStartPoint" For="@(() => _model.RandomStartPoint)" Dense="true"/>
            </MudStack>
            <MudStack Row="true" Breakpoint="Breakpoint.SmAndDown" Class="form-field-stack gap-md-8 mb-5">
                <div class="d-flex">
                    <MudText>Fixed Start Time Behavior</MudText>
                </div>
                <MudSelect @bind-Value="@_model.FixedStartTimeBehavior" For="@(() => _model.FixedStartTimeBehavior)">
                    <MudSelectItem Value="FixedStartTimeBehavior.Strict">Strict - Wait For Exact Start Time</MudSelectItem>
                    <MudSelectItem Value="FixedStartTimeBehavior.Flexible">Flexible - Start As Soon As Possible</MudSelectItem>
                </MudSelect>
            </MudStack>
        </MudContainer>
    </div>
</MudForm>

@code {
    private CancellationTokenSource _cts;

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

    private readonly ProgramScheduleEditViewModel _model = new();
    private MudForm _form;
    private bool _success;

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

    protected override async Task OnParametersSetAsync()
    {
        _cts?.Cancel();
        _cts?.Dispose();
        _cts = new CancellationTokenSource();
        var token = _cts.Token;

        try
        {
            if (IsEdit)
            {
                Option<ProgramScheduleViewModel> maybeProgramSchedule = await Mediator.Send(new GetProgramScheduleById(Id), token);
                maybeProgramSchedule.Match(
                    viewModel =>
                    {
                        _model.Id = viewModel.Id;
                        _model.Name = viewModel.Name;
                        _model.ShuffleScheduleItems = viewModel.ShuffleScheduleItems;
                        _model.KeepMultiPartEpisodesTogether = viewModel.KeepMultiPartEpisodesTogether;
                        _model.TreatCollectionsAsShows = viewModel.TreatCollectionsAsShows;
                        _model.RandomStartPoint = viewModel.RandomStartPoint;
                        _model.FixedStartTimeBehavior = viewModel.FixedStartTimeBehavior;
                    },
                    () => NavigationManager.NavigateTo("404"));
            }
            else
            {
                _model.Name = "New Schedule";
            }
        }
        catch (OperationCanceledException)
        {
            // do nothing
        }
    }

    private bool IsEdit => Id > 0;

    private async Task HandleSubmitAsync()
    {
        await _form.Validate();
        if (_success)
        {
            Either<BaseError, EntityIdResult> result = IsEdit
                ? await Mediator.Send(_model.ToUpdate(), _cts.Token).MapT(r => r as EntityIdResult)
                : await Mediator.Send(_model.ToCreate(), _cts.Token).MapT(r => r as EntityIdResult);

            result.Match(
                programSchedule =>
                {
                    string destination = IsEdit ? "/schedules" : $"/schedules/{programSchedule.Id}/items";
                    NavigationManager.NavigateTo(destination);
                },
                error =>
                {
                    Snackbar.Add(error.Value, Severity.Error);
                    Logger.LogError("Unexpected error saving schedule: {Error}", error.Value);
                });
        }
    }

}