@page "/settings/xmltv"
@using ErsatzTV.Application.Configuration
@implements IDisposable
@inject IMediator Mediator
@inject ISnackbar Snackbar
@inject ILogger<XMLTVSettings> Logger

<MudForm 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" OnClick="@(_ => SaveXmltvSettings())" Class="ml-6" StartIcon="@Icons.Material.Filled.Save">Save Settings</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">XMLTV</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>Days To Build</MudText>
                </div>
                <MudTextField @bind-Value="_xmltvSettings.DaysToBuild" Validation="@(new Func<int, string>(ValidateXmltvDaysToBuild))" Required="true" RequiredError="XMLTV days to build is required!" Adornment="Adornment.End" AdornmentText="days"/>
            </MudStack>
            <MudStack Row="true" Breakpoint="Breakpoint.SmAndDown" Class="form-field-stack gap-md-8 mb-5">
                <div class="d-flex">
                    <MudText>XMLTV Time Zone</MudText>
                </div>
                <MudSelect @bind-Value="_xmltvSettings.TimeZone">
                    <MudSelectItem Value="@XmltvTimeZone.Local">Local</MudSelectItem>
                    <MudSelectItem Value="@XmltvTimeZone.Utc">UTC</MudSelectItem>
                </MudSelect>
            </MudStack>
            <MudStack Row="true" Breakpoint="Breakpoint.SmAndDown" Class="form-field-stack gap-md-8 mb-5">
                <div class="d-flex">
                    <MudText>XMLTV Block Behavior</MudText>
                </div>
                <MudSelect @bind-Value="_xmltvSettings.BlockBehavior">
                    <MudSelectItem Value="@XmltvBlockBehavior.SplitTimeEvenly">Split Time Evenly</MudSelectItem>
                    <MudSelectItem Value="@XmltvBlockBehavior.UseActualTimes">Use Actual Times</MudSelectItem>
                </MudSelect>
            </MudStack>
        </MudContainer>
    </div>
</MudForm>

@code {
    private CancellationTokenSource _cts;

    private XmltvSettingsViewModel _xmltvSettings = new();

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

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

        try
        {
            _xmltvSettings = await Mediator.Send(new GetXmltvSettings(), token);
        }
        catch (OperationCanceledException)
        {
            // do nothing
        }
    }

    private static string ValidateXmltvDaysToBuild(int daysToBuild) => daysToBuild <= 0 ? "XMLTV days to build must be greater than zero" : null;

    private async Task SaveXmltvSettings()
    {
        Either<BaseError, Unit> result = await Mediator.Send(new UpdateXmltvSettings(_xmltvSettings), _cts.Token);
        result.Match(
            Left: error =>
            {
                Snackbar.Add(error.Value, Severity.Error);
                Logger.LogError("Unexpected error saving xmltv settings: {Error}", error.Value);
            },
            Right: _ => Snackbar.Add("Successfully saved xmltv settings", Severity.Success));
    }

}