@page "/calendars/{calendarId:int}/events/{eventUid}"
@inject Data.CalendarService _calendarService
@inject NavigationManager _navigationManager

<a href="/calendars/@CalendarId">
    <span class="oi oi-arrow-left"></span> Back
</a>

@if (_event == null)
{
    <p>
        <em>@(_notFound ? "Event not found" : "Loading...")</em>
    </p>
}
else
{
    @if (!_editTitle)
    {
        <h1 class="event-summary">
            <span @onclick="() => _editTitle = true">@_event.Summary</span>
        </h1>
    }
    else
    {
        <input @bind="@_event.Summary">
        <button @onclick="UpdateEvent">Save</button>
    }

    <div>
        <strong>ETag:</strong> @_event.ETag
    </div>

    @if (_event.DtStart != null)
    {
        <div>
            <strong>Start:</strong> @_event.DtStart
        </div>
    }

    @if (_event.CalculatedEnd != null)
    {
        <div>
            <strong>End:</strong> @_event.CalculatedEnd
        </div>
    }

    @if (_event.Description != null)
    {
        <p class="event-description">@_event.Description</p>
    }

    @if (!_confirmDelete)
    {
        <button class="btn btn-outline-danger" @onclick="DeleteEvent">Delete</button>
    }
    else
    {
        <button class="btn btn-danger" @onclick="DeleteEvent">Are you sure?</button>
    }
}

@code
{
    [Parameter]
    public int CalendarId { get; set; }

    [Parameter]
    public string EventUid { get; set; }

    private Data.Calendar _calendar;
    private Data.Event _event;

    private bool _notFound;
    private bool _editTitle;
    private bool _confirmDelete;

    protected override async Task OnInitializedAsync()
    {
        _calendar = await Data.CalendarService.GetCalendarById(CalendarId);
        _event = await _calendar.GetEventByUid(EventUid);
        _notFound = _event == null;
    }

    private async Task UpdateEvent()
    {
        _event = await _calendar.UpdateEvent(_event);
    }

    private async Task DeleteEvent()
    {
        if (!_confirmDelete)
        {
            _confirmDelete = true;
            await Task.Delay(2000);
        }
        else
        {
            await _calendar.DeleteEvent(_event);
            _navigationManager.NavigateTo($"/calendars/{CalendarId}");
        }

        _confirmDelete = false;
    }
}