'use client';

import { useTranslations } from 'next-intl';
import { ChevronRight } from 'lucide-react';
import { Link } from '@/i18n/navigation';
import { Card } from '@/components/ui/shared/Card';
import { formatTimeForInput } from '@/components/appointments/appointmentTime';
import { canAccessAppointmentsSection } from '@/components/shared/permissions';
import { useAuth } from '@/lib/hooks/useAuth';
import { ListRowSkeleton } from '@/components/today/TodaySkeleton';
import type { TodaySummaryActions } from '@/types/today';

interface TodayUpcomingAppointmentsProps {
  actions: TodaySummaryActions;
  loading?: boolean;
  isInitialLoad?: boolean;
}

export function TodayUpcomingAppointments({
  actions,
  loading = false,
  isInitialLoad = false,
}: TodayUpcomingAppointmentsProps) {
  const t = useTranslations('today');
  const { currentOrganization } = useAuth();

  if (!canAccessAppointmentsSection(currentOrganization)) {
    return null;
  }

  const appointments = actions.upcomingAppointmentsToday ?? [];

  if (isInitialLoad) {
    return (
      <Card className="min-h-[280px]">
        <div className="mb-4 space-y-2">
          <div className="h-4 w-40 animate-pulse rounded bg-background-secondary/60" />
          <div className="h-3 w-56 animate-pulse rounded bg-background-secondary/60" />
        </div>
        <div className="space-y-3">
          {[0, 1, 2].map((key) => (
            <ListRowSkeleton key={key} />
          ))}
        </div>
      </Card>
    );
  }

  return (
    <Card className={`min-h-[280px] ${loading ? 'opacity-70 transition-opacity' : ''}`}>
      <div className="flex flex-col sm:flex-row sm:items-start sm:justify-between gap-3 mb-4">
        <div>
          <h2 className="text-base font-semibold text-card-foreground">
            {t('upcomingAppointmentsTitle')}
          </h2>
          <p className="text-xs text-text-muted mt-1">{t('upcomingAppointmentsSubtitle')}</p>
        </div>
        <Link
          href="/appointments"
          className="text-xs font-medium text-primary hover:underline underline-offset-2 shrink-0"
        >
          {t('viewAllAppointments')}
        </Link>
      </div>

      {appointments.length === 0 ? (
        <div className="flex flex-1 min-h-[160px] items-center justify-center rounded-[var(--radius-md)] border border-dashed border-border/50 bg-background-secondary/20 px-4">
          <p className="text-sm text-text-muted text-center">{t('noUpcomingAppointments')}</p>
        </div>
      ) : (
        <ul className="divide-y divide-border/40">
          {appointments.map((appointment) => {
            const start = new Date(appointment.startAt);
            const end = new Date(appointment.endAt);
            const timeLabel = `${formatTimeForInput(start)} – ${formatTimeForInput(end)}`;

            return (
              <li key={appointment.id}>
                <Link
                  href="/appointments"
                  className="flex items-center justify-between gap-3 py-3 -mx-2 px-2 rounded-[var(--radius-md)] hover:bg-background-secondary/45 transition-colors group"
                >
                  <div className="min-w-0">
                    <p className="text-sm font-medium text-text-primary truncate">
                      {appointment.patientName}
                    </p>
                    <p className="text-xs text-text-muted mt-0.5 truncate">
                      {timeLabel}
                      {appointment.purpose ? (
                        <span className="text-text-secondary"> · {appointment.purpose}</span>
                      ) : null}
                    </p>
                  </div>
                  <ChevronRight
                    className="h-4 w-4 shrink-0 text-text-muted opacity-0 group-hover:opacity-100 transition-opacity"
                    aria-hidden
                  />
                </Link>
              </li>
            );
          })}
        </ul>
      )}
    </Card>
  );
}