@page "/calendar"
@attribute [Authorize]
@using WebApp.Components.Shared.Components
@using WebApp.Models
@using WebApp.Services
@using Heron.MudCalendar
@inject IEventOccurrenceService EventOccurrenceService

<PageHeader Title="Event Calendar" Description="View competition schedules and event occurrences" Icon="@AppIcons.EventCalendar">
    <ActionButtons>
        <MudButton StartIcon="@Icons.Material.Filled.ImportExport" Href="calendar/event-occurrences/import" Variant="Variant.Filled" Color="Color.Primary">Import</MudButton>
    </ActionButtons>
</PageHeader>

<MudPaper Elevation="2" Class="pa-6">
    @if (_calendarItems == null)
    {
        <MudProgressLinear Indeterminate="true" />
        <MudText>Loading calendar events...</MudText>
    }
    else
    {
        <MudCalendar T="CalendarEventItem" 
                     Items="_calendarItems" 
                     View="CalendarView.Day"
                     CurrentDay=_calendarDate
                     />
    }
</MudPaper>

@code {
    private List<CalendarEventItem>? _calendarItems;
    private DateTime _calendarDate = DateTime.Today;

    protected override async Task OnInitializedAsync()
    {
        await LoadCalendarEvents();
    }

    private async Task LoadCalendarEvents()
    {
        var occurrences = await EventOccurrenceService.GetEventOccurrencesAsync();
        _calendarItems = occurrences
            .Select(occ => new CalendarEventItem(occ))
            .ToList();

        // Find the next date with events
        _calendarDate = GetNextDateWithEvents();
    }

    private DateTime GetNextDateWithEvents()
    {
        if (_calendarItems == null || !_calendarItems.Any())
        {
            return DateTime.Today;
        }

        var today = DateTime.Today;
        var nextEvent = _calendarItems
            .Where(item => item.Start.Date >= today)
            .OrderBy(item => item.Start)
            .FirstOrDefault();

        return nextEvent?.Start.Date ?? _calendarItems.OrderBy(item => item.Start).First().Start.Date;
    }
}