import { useEffect, useState } from 'react';
import { timeElapsed } from '../utils/dateUtils'; // Make sure it calculates in hours
import { THRESH_HOLD } from '../utils/constants';

// THRESH_HOLD in hours (e.g., 12, 48, or 60)
export const ACTIONS = {
  CHECK_IN: 0,
  CHECK_OUT: 1,
  REGULARIZATION: 2,
  REQUESTED: 3,
  APPROVED: 4,
  REJECTED: 5
};

const useAttendanceStatus = (attendanceData) => {
  const [status, setStatus] = useState({
    status: "Unknown",
    action: null,
    disabled: true,
    text: "Unknown",
    color: 'btn-secondary',
  });

  useEffect(() => {
    const { checkInTime, checkOutTime, activity } = attendanceData;
    const now = new Date();

    const isSameDay = (date1, date2) =>
      new Date(date1).toDateString() === new Date(date2).toDateString();

    // 1. No check-in/check-out yet → Allow Check-In
    if (activity === 0 && !checkInTime && !checkOutTime) {
      return setStatus({
        status: "Check-In",
        action: ACTIONS.CHECK_IN,
        disabled: false,
        text: "Check In",
        color: 'btn-primary',
      });
    }

    // 2. Checked in, no checkout yet
    if (checkInTime && !checkOutTime) {
      if (timeElapsed(checkInTime, THRESH_HOLD)) {
        return setStatus({
          status: "Request Regularize",
          action: ACTIONS.REGULARIZATION,
          disabled: false,
          text: "Regularize",
          color: 'btn-warning',
        });
      } else {
        return setStatus({
          status: "Check-Out",
          action: ACTIONS.CHECK_OUT,
          disabled: false,
          text: "Check Out",
          color: 'btn-primary',
        });
      }
    }

    // 3. Already checked in and out → Handle activity === 4 (Approved)
if (checkInTime && checkOutTime && activity === 4) {
  if (!isSameDay(checkInTime, now) && !timeElapsed(checkInTime, THRESH_HOLD)) {
    // Case: Past day, but still within threshold → Approved
    return setStatus({
      status: "Approved",
      action: ACTIONS.APPROVED,
      disabled: true,
      text: "Approved",
      color: 'btn-success',
    });
  } else if (isSameDay(checkOutTime, now)) {
    // Case: same day → allow check-in again
    return setStatus({
      status: "Check In",
      action: ACTIONS.CHECK_IN,
      disabled: false,
      text: "Check In",
      color: 'btn-primary',
    });
  } else {
    // Case: not same day AND over 48 hours → freeze status as Approved
    return setStatus({
      status: "Approved",
      action: ACTIONS.APPROVED,
      disabled: true,
      text: "Approved",
      color: 'btn-success',
    });
  }
}


    // 4. Regularization Requested
    if (activity === 2) {
      return setStatus({
        status: "Requested",
        action: ACTIONS.REQUESTED,
        disabled: true,
        text: "Requested",
        color: 'btn-info',
      });
    }

    // 5. Rejected Regularization
    if (activity === 5) {
      return setStatus({
        status: "Rejected",
        action: ACTIONS.REJECTED,
        disabled: true,
        text: "Rejected",
        color: 'btn-danger',
      });
    }

    // Default to Approved if none of the above apply
    return setStatus({
      status: "Approved",
      action: ACTIONS.APPROVED,
      disabled: true,
      text: "Approved",
      color: 'btn-success',
    });

  }, [attendanceData]);

  return status;
};

export default useAttendanceStatus;