import { ActionIcon, Badge, Menu, Text } from '@mantine/core';
import { IconDotsVertical, IconRefresh, IconUserCheck } from '@tabler/icons-react';
import type { TFunction } from 'i18next';
import type { AdvancedColumn } from '@ema-platform/ui';
import { LICENSE_PERMISSIONS, RequirePermission } from '@ema-platform/auth';
import type { AttendanceStatus, ExamRegistration } from '../../types/exam';

const ATTENDANCE_COLOR: Record<AttendanceStatus, string> = {
  REGISTERED: 'gray',
  PRESENT: 'teal',
  LATE: 'yellow',
  ABSENT: 'red',
  WITHDRAWN: 'orange',
  DISQUALIFIED: 'red',
};

export const candidateName = (registration: ExamRegistration) =>
  [
    registration.profile?.firstName,
    registration.profile?.middleName,
    registration.profile?.lastName,
  ]
    .filter(Boolean)
    .join(' ') || registration.profileId.slice(0, 8);

export function examCandidateColumns(
  t: TFunction,
  handlers: {
    onRecord: (registration: ExamRegistration) => void;
    onRegrade: (registration: ExamRegistration) => void;
    regrading?: string | null;
  },
): AdvancedColumn<ExamRegistration>[] {
  return [
    {
      header: t('exam.candidates.admission'),
      cell: ({ row }) => (
        <Text fz="sm" ff="monospace" fw={600}>
          {row.original.admissionNumber}
        </Text>
      ),
    },
    {
      header: t('exam.candidates.name'),
      cell: ({ row }) => <Text fz="sm">{candidateName(row.original)}</Text>,
    },
    {
      header: t('exam.candidates.attempt'),
      cell: ({ row }) => (
        <Badge
          size="sm"
          variant="light"
          color={row.original.kind === 'RETAKE' ? 'orange' : 'blue'}
        >
          {row.original.kind === 'RETAKE'
            ? t('exam.candidates.retake', { n: row.original.attemptNumber })
            : t('exam.candidates.firstSitting')}
        </Badge>
      ),
    },
    {
      header: t('exam.candidates.attendance'),
      cell: ({ row }) => (
        <Badge
          size="sm"
          variant="light"
          color={ATTENDANCE_COLOR[row.original.attendanceStatus] ?? 'gray'}
        >
          {t(`exam.attendance.${row.original.attendanceStatus}`)}
        </Badge>
      ),
    },
    {
      header: t('exam.candidates.remark'),
      cell: ({ row }) => (
        <Text fz="xs" c="dimmed" maw={220} lineClamp={2}>
          {row.original.attendanceRemark ?? '—'}
        </Text>
      ),
    },
    {
      header: '',
      label: t('exam.candidates.record'),
      align: 'right',
      cell: ({ row }) => {
        const attemptStatus = row.original.attempt?.status;
        const canRegrade = attemptStatus === 'SUBMITTED' || attemptStatus === 'EXPIRED';
        return (
          <Menu shadow="md" width={180} position="bottom-end">
            <Menu.Target>
              <ActionIcon
                variant="subtle"
                color="gray"
                size="sm"
                loading={handlers.regrading === row.original.attempt?.id}
              >
                <IconDotsVertical size={16} />
              </ActionIcon>
            </Menu.Target>
            <Menu.Dropdown>
              <RequirePermission
                anyOf={[LICENSE_PERMISSIONS.RECORD_EXAM_ATTENDANCE]}
                hideOnly
              >
                <Menu.Item
                  leftSection={<IconUserCheck size={14} />}
                  onClick={() => handlers.onRecord(row.original)}
                >
                  {t('exam.candidates.record')}
                </Menu.Item>
              </RequirePermission>
              {canRegrade && (
                <RequirePermission
                  anyOf={[LICENSE_PERMISSIONS.RECORD_EXAM_RESULT]}
                  hideOnly
                >
                  <Menu.Item
                    color="grape"
                    leftSection={<IconRefresh size={14} />}
                    onClick={() => handlers.onRegrade(row.original)}
                  >
                    {t('exam.candidates.regrade')}
                  </Menu.Item>
                </RequirePermission>
              )}
            </Menu.Dropdown>
          </Menu>
        );
      },
    },
  ];
}