@using OnProfNext.Client.Services
@using OnProfNext.Shared.Models.DTOs
@inject BookingApiService BookingService

<div class="card shadow-sm border-0 mb-4">
    <div class="card-body">
        <div class="d-flex justify-content-between align-items-center mb-3">
            <button class="btn btn-outline-primary" @onclick="PreviousMonth">
                <i class="bi bi-chevron-left"></i> Vorheriger Monat
            </button>
            <h5 class="text-primary m-0">@CurrentMonth.ToString("MMMM yyyy")</h5>
            <button class="btn btn-outline-primary" @onclick="NextMonth">
                Nächster Monat <i class="bi bi-chevron-right"></i>
            </button>
        </div>
        <div class="monthly-calendar">
            <table class="table table-bordered text-center">
                <thead class="table-light">
                    <tr>
                        <th>Mo</th>
                        <th>Di</th>
                        <th>Mi</th>
                        <th>Do</th>
                        <th>Fr</th>
                        <th>Sa</th>
                        <th>So</th>
                    </tr>
                </thead>
                <tbody>
                    @foreach (var week in GetCalendarWeeks())
                    {
                        <tr>
                            @foreach (var day in week)
                            {
                                <td class="@(day.Month == CurrentMonth.Month ? "" : "text-muted") @(IsWeekend(day) ? "weekend" : "")"
                                    @onclick="() => OpenModal(day)">
                                    @day.Day
                                    <br />
                                    <small class="@GetHoursColorClass(day)">@GetHoursForDay(day) h</small>
                                </td>
                            }
                        </tr>
                    }
                </tbody>
            </table>
        </div>
    </div>
</div>

@if (showModal)
{
    <div class="modal fade show d-block" tabindex="-1" style="background-color: rgba(0,0,0,0.5);">
        <div class="modal-dialog modal-dialog-centered" @onclick:stopPropagation>
            <div class="modal-content border-0 shadow">
                <div class="modal-header bg-primary text-white">
                    <h5 class="modal-title">Buchung für @selectedDate.ToString("dd.MM.yyyy")</h5>
                    <button type="button" class="btn-close btn-close-white" @onclick="CloseModal"></button>
                </div>
                <div class="modal-body">
                    <EditForm Model="newBooking" OnValidSubmit="SaveBookingAsync">
                        <DataAnnotationsValidator />
                        <ValidationSummary />

                        <div class="mb-3">
                            <label class="form-label">Auftrag</label>
                            <InputSelect class="form-select" @bind-Value="newBooking.OrderId">
                                <option value="0" disabled>Auswählen...</option>
                                @foreach (var order in Orders)
                                {
                                    <option value="@order.Id">@order.Titel (@order.Auftragsnummer)</option>
                                }
                            </InputSelect>
                        </div>

                        <div class="mb-3">
                            <label class="form-label">Stunden</label>
                            <InputNumber class="form-control" @bind-Value="newBooking.Hours" />
                        </div>

                        <div class="mb-3">
                            <label class="form-label">Beschreibung</label>
                            <InputTextArea class="form-control" @bind-Value="newBooking.Description" />
                        </div>

                        <div class="d-flex justify-content-end">
                            <button type="button" class="btn btn-secondary me-2" @onclick="CloseModal">Abbrechen</button>
                            <button type="submit" class="btn btn-success">Speichern</button>
                        </div>
                    </EditForm>
                </div>
            </div>
        </div>
    </div>
}

@code {
    [Parameter] public List<BookingDto> Bookings { get; set; } = new();
    [Parameter] public List<OrderDto> Orders { get; set; } = new();
    [Parameter] public EventCallback OnBookingCreated { get; set; }
    [Parameter] public EventCallback<string> OnError { get; set; }

    private DateTime CurrentMonth = DateTime.Today;
    private bool showModal;
    private DateTime selectedDate;
    private BookingCreateDto newBooking = new();

    private void PreviousMonth()
    {
        CurrentMonth = CurrentMonth.AddMonths(-1);
    }

    private void NextMonth()
    {
        CurrentMonth = CurrentMonth.AddMonths(1);
    }

    private List<DateTime[]> GetCalendarWeeks()
    {
        var weeks = new List<DateTime[]>();
        var firstDayOfMonth = new DateTime(CurrentMonth.Year, CurrentMonth.Month, 1);
        var firstMonday = firstDayOfMonth.AddDays(-(int)firstDayOfMonth.DayOfWeek + (firstDayOfMonth.DayOfWeek == DayOfWeek.Sunday ? 0 : 1));
        var currentDay = firstMonday;

        for (int weekCount = 0; weekCount < 6; weekCount++)
        {
            // Prüfe, ob currentDay noch im gültigen DateTime-Bereich liegt
            if (currentDay.Year >= DateTime.MaxValue.Year)
                break;

            var week = new DateTime[7];
            for (int i = 0; i < 7; i++)
            {
                week[i] = currentDay;
                // Prüfe, ob das Hinzufügen eines Tages möglich ist
                if (currentDay < DateTime.MaxValue.AddDays(-1))
                    currentDay = currentDay.AddDays(1);
                else
                    break;
            }
            weeks.Add(week);

            // Wenn currentDay nicht mehr incrementiert werden kann, beende die Schleife
            if (currentDay >= DateTime.MaxValue.AddDays(-1))
                break;
        }
        return weeks;
    }

    private bool IsWeekend(DateTime day)
    {
        return day.DayOfWeek == DayOfWeek.Saturday || day.DayOfWeek == DayOfWeek.Sunday;
    }

    private decimal GetHoursForDay(DateTime day)
    {
        return Bookings.Where(b => b.Date.Date == day.Date).Sum(b => b.Hours);
    }

    private string GetHoursColorClass(DateTime day)
    {
        var hours = GetHoursForDay(day);
        if (hours >= 8)
            return "text-success";
        else if (hours > 6 && hours < 8)
            return "text-warning";
        else
            return "text-danger";
    }

    private void OpenModal(DateTime date)
    {
        selectedDate = date;
        newBooking = new() { Date = date, MandantId = 1 };
        showModal = true;
    }

    private void CloseModal() => showModal = false;

    private async Task SaveBookingAsync()
    {
        var (success, error) = await BookingService.CreateBookingAsync(newBooking);
        if (success)
        {
            await OnBookingCreated.InvokeAsync();
            CloseModal();
        }
        else
        {
            await OnError.InvokeAsync(error ?? "Fehler beim Speichern der Buchung.");
        }
    }
}

<style>
    .monthly-calendar td {
        cursor: pointer;
        padding: 10px;
        vertical-align: top;
        height: 80px;
    }

        .monthly-calendar td:hover {
            background-color: #f8f9fa;
        }

        .monthly-calendar td.weekend {
            background-color: #f8f9fa;
        }
</style>