export default {
  async openBookingWidget() {
    const calendarModel = Custom5.model || {};
    const selection = calendarModel.calendarSelection || null;

    if (!selection) {
      showAlert(
        "Bitte zuerst einen Tag oder Zeitraum auswählen.",
        "warning"
      );
      return;
    }

    function pad(value) {
      return String(value).padStart(2, "0");
    }

    function parseLocalDateTime(value) {
      if (!value) return null;

      const text = String(value).trim();
      const parts = text.split(/[-T:]/g);

      if (parts.length < 3) return null;

      const date = new Date(
        Number(parts[0]),
        Number(parts[1]) - 1,
        Number(parts[2]),
        Number(parts[3] || 0),
        Number(parts[4] || 0),
        Number(parts[5] || 0)
      );

      return Number.isNaN(date.getTime()) ? null : date;
    }

    function formatDate(date) {
      return [
        date.getFullYear(),
        pad(date.getMonth() + 1),
        pad(date.getDate())
      ].join("-");
    }

    function formatTime(date) {
      return [
        pad(date.getHours()),
        pad(date.getMinutes())
      ].join(":");
    }

    function formatDateTimeForSql(date) {
      return `${formatDate(date)} ${formatTime(date)}:00`;
    }

    const start = parseLocalDateTime(selection.start);
    const end = parseLocalDateTime(selection.end);

    if (!start || !end) {
      showAlert(
        "Die Kalenderauswahl enthält kein gültiges Datum.",
        "error"
      );
      return;
    }

    const seatId = String(
      Custom4.model?.seatId ||
      appsmith.store.selectedSeatId ||
      ""
    ).trim();

    const seatName = String(
      Custom4.model?.seatName ||
      appsmith.store.selectedSeatName ||
      ""
    ).trim();

    if (!seatId) {
      showAlert(
        "Es wurde kein Sitzplatz ausgewählt.",
        "error"
      );
      return;
    }

    const bookedBy =
      appsmith.user?.email ||
      appsmith.user?.username ||
      null;

    if (!bookedBy) {
      showAlert(
        "Der angemeldete Benutzer konnte nicht ermittelt werden.",
        "error"
      );
      return;
    }

    const isAllDay =
      selection.allDay === true ||
      selection.type === "day" ||
      selection.type === "days";

    let endDate;
    let startTime = null;
    let endTime = null;
    let endDateTime = end;

    if (isAllDay) {
      const lastSelectedDay = new Date(end);
      lastSelectedDay.setDate(lastSelectedDay.getDate() - 1);
      endDate = formatDate(lastSelectedDay);
      endDateTime = new Date(lastSelectedDay);
      endDateTime.setHours(23, 59, 59, 0);
    } else {
      endDate = formatDate(end);
      startTime = formatTime(start);
      endTime = formatTime(end);
    }

    const recurringCheckbox =
      typeof RecurringCheckbox !== "undefined"
        ? RecurringCheckbox
        : null;

    const bookingFormData = {
      seatId,
      seatName,
      bookedBy,
      title: "Platzbuchung",
      type: selection.type || null,
      startDate: formatDate(start),
      endDate,
      startTime,
      endTime,
      startDateTime: formatDateTimeForSql(start),
      endDateTime: formatDateTimeForSql(endDateTime),
      allDay: Boolean(isAllDay),
      recurring: Boolean(
        recurringCheckbox?.isChecked || false
      )
    };

    try {
      await storeValue(
        "bookingFormData",
        bookingFormData,
        false
      );

      await showModal("Platzbuchung");
    } catch (error) {
      console.error(
        "Buchungsdaten konnten nicht gespeichert werden:",
        error
      );

      showAlert(
        "Die Buchungsdaten konnten nicht gespeichert werden.",
        "error"
      );
    }
  }
};