import React, { useState, useMemo } from 'react';
import { useQuery, useMutation } from '@tanstack/react-query';
import { useNavigate } from 'react-router-dom';
import {
  MagnifyingGlassIcon, EyeIcon, TableCellsIcon, CalendarDaysIcon as CalendarViewIcon,
  CalendarIcon, ClockIcon, CheckCircleIcon, XCircleIcon,
  PlusIcon, XMarkIcon, ChevronRightIcon, ChevronLeftIcon, UserCircleIcon,
} from '@heroicons/react/24/outline';
import { toast } from 'sonner';
import { api } from '../lib/api';
import type { PaginatedResponse, ApiResponse } from '../lib/api';
import type { Appointment } from '../types';
import { formatDate, maskMobile, toGregorianDate } from '../lib/utils';
import DataTable, { Column } from '../components/ui/DataTable';
import Pagination from '../components/ui/Pagination';
import PersianDateInput from '../components/ui/PersianDateInput';
import { useAuthStore } from '../stores/authStore';

// ── Status config ──────────────────────────────────────────────────────────

const STATUS_META: Record<string, { label: string; cls: string }> = {
  waiting_for_payment: { label: 'انتظار پرداخت', cls: 'status-amber' },
  reserved:            { label: 'رزرو شده',       cls: 'status-blue' },
  checked_in:          { label: 'ورود به مطب',    cls: 'status-violet' },
  waiting:             { label: 'صف انتظار',      cls: 'status-amber' },
  in_progress:         { label: 'در حال ویزیت',   cls: 'status-violet' },
  visited:             { label: 'ویزیت شده',       cls: 'status-green' },
  completed:           { label: 'تکمیل شده',       cls: 'status-green' },
  cancelled_by_user:   { label: 'لغو توسط بیمار',  cls: 'status-red' },
  cancelled_by_doctor: { label: 'لغو توسط پزشک',   cls: 'status-red' },
  cancelled_by_admin:  { label: 'لغو توسط ادمین',  cls: 'status-red' },
  auto_cancel_unpaid:  { label: 'لغو خودکار',       cls: 'status-gray' },
  no_show:             { label: 'غیبت',             cls: 'status-gray' },
};

const STATUS_FILTERS = [
  { value: '', label: 'همه وضعیت‌ها' },
  { value: 'reserved',            label: 'رزرو شده' },
  { value: 'waiting_for_payment', label: 'در انتظار پرداخت' },
  { value: 'checked_in',          label: 'ورود به مطب' },
  { value: 'waiting',             label: 'صف انتظار' },
  { value: 'in_progress',         label: 'در حال ویزیت' },
  { value: 'visited',             label: 'ویزیت شده' },
  { value: 'completed',           label: 'تکمیل شده' },
  { value: 'cancelled_by_doctor', label: 'لغو پزشک' },
  { value: 'cancelled_by_user',   label: 'لغو بیمار' },
  { value: 'no_show',             label: 'غیبت' },
];

function ApptStatus({ status }: { status: string }) {
  const m = STATUS_META[status] ?? { label: status, cls: 'status-gray' };
  return (
    <span className={`appt-status ${m.cls}`}>
      <span className="appt-status-dot" />
      {m.label}
    </span>
  );
}

// ── Timeline View ─────────────────────────────────────────────────────────

interface TimelineProps {
  items: Appointment[];
  loading: boolean;
  onView: (uuid: string) => void;
  groupByDoctor?: boolean;
}

function DayGroup({ date, appts, onView }: { date: string; appts: Appointment[]; onView: (u: string) => void }) {
  return (
    <div style={{ marginBottom: '1.25rem' }}>
      <div style={{
        fontSize: 12, fontWeight: 600, color: 'var(--text-3)', marginBottom: '0.6rem',
        display: 'flex', alignItems: 'center', gap: 8,
      }}>
        <span style={{ width: 24, height: 1, background: 'var(--border)', display: 'inline-block' }} />
        {formatDate(date)}
        <span style={{ flex: 1, height: 1, background: 'var(--border)', display: 'inline-block' }} />
      </div>
      <div style={{ display: 'flex', flexDirection: 'column', gap: 8 }}>
        {appts.map((a) => (
          <div
            key={a.uuid}
            style={{
              display: 'flex', alignItems: 'center', gap: 14, padding: '0.7rem 1rem',
              background: 'var(--surface-alt, #f8fafc)', borderRadius: 10,
              border: '1px solid var(--border)', cursor: 'pointer', transition: 'box-shadow .15s',
            }}
            onClick={() => onView(a.uuid)}
            onMouseEnter={e => (e.currentTarget.style.boxShadow = '0 2px 8px rgba(0,0,0,.07)')}
            onMouseLeave={e => (e.currentTarget.style.boxShadow = 'none')}
          >
            <div style={{
              width: 50, height: 50, borderRadius: 10, flexShrink: 0,
              background: 'var(--primary-soft, #eef2ff)', color: 'var(--primary)',
              display: 'flex', flexDirection: 'column', alignItems: 'center', justifyContent: 'center',
              fontWeight: 700, fontSize: 14, lineHeight: 1.2,
            }}>
              {a.appointment_time}
            </div>
            <div style={{ flex: 1, minWidth: 0 }}>
              <div style={{ fontWeight: 600, fontSize: 13.5, whiteSpace: 'nowrap', overflow: 'hidden', textOverflow: 'ellipsis' }}>
                {a.patient_name || maskMobile(a.patient_mobile)}
              </div>
              <div className="muted" style={{ fontSize: 12, marginTop: 2 }}>
                دکتر {a.doctor_name}{a.clinic_name ? ` · ${a.clinic_name}` : ''}
              </div>
            </div>
            <ApptStatus status={a.status} />
            <EyeIcon style={{ width: 15, height: 15, color: 'var(--text-3)', flexShrink: 0 }} />
          </div>
        ))}
      </div>
    </div>
  );
}

function TimelineView({ items, loading, onView, groupByDoctor }: TimelineProps) {
  if (loading) {
    return (
      <div style={{ display: 'flex', flexDirection: 'column', gap: 12, padding: '1rem' }}>
        {Array.from({ length: 5 }).map((_, i) => (
          <div key={i} style={{ display: 'flex', gap: 12, alignItems: 'center' }}>
            <div className="skeleton" style={{ width: 50, height: 50, borderRadius: 10, flexShrink: 0 }} />
            <div style={{ flex: 1 }}>
              <div className="skeleton" style={{ height: 13, borderRadius: 4, width: '50%', marginBottom: 7 }} />
              <div className="skeleton" style={{ height: 11, borderRadius: 4, width: '30%' }} />
            </div>
          </div>
        ))}
      </div>
    );
  }

  if (!items.length) {
    return <p className="muted" style={{ textAlign: 'center', padding: '3rem 0', fontSize: 13.5 }}>هیچ نوبتی یافت نشد</p>;
  }

  if (groupByDoctor) {
    // group by doctor → date
    const byDoctor = items.reduce<Record<string, Appointment[]>>((acc, a) => {
      (acc[a.doctor_name] ??= []).push(a);
      return acc;
    }, {});

    return (
      <div style={{ padding: '0 1rem 1rem' }}>
        {Object.entries(byDoctor).map(([docName, docAppts]) => {
          const byDate = docAppts.reduce<Record<string, Appointment[]>>((acc, a) => {
            (acc[a.appointment_date] ??= []).push(a);
            return acc;
          }, {});
          return (
            <div key={docName} style={{ marginBottom: '1.5rem' }}>
              <div style={{
                display: 'flex', alignItems: 'center', gap: 8, marginBottom: '0.75rem',
                padding: '6px 10px', borderRadius: 8,
                background: 'var(--primary-soft, #eef2ff)', border: '1px solid color-mix(in srgb, var(--primary) 20%, transparent)',
              }}>
                <UserCircleIcon style={{ width: 16, height: 16, color: 'var(--primary)' }} />
                <span style={{ fontWeight: 700, fontSize: 13.5, color: 'var(--primary)' }}>دکتر {docName}</span>
                <span className="muted" style={{ fontSize: 12, marginRight: 'auto' }}>{docAppts.length} نوبت</span>
              </div>
              {Object.entries(byDate).map(([date, appts]) => (
                <DayGroup key={date} date={date} appts={appts} onView={onView} />
              ))}
            </div>
          );
        })}
      </div>
    );
  }

  // default: group by date only
  const byDate = items.reduce<Record<string, Appointment[]>>((acc, a) => {
    (acc[a.appointment_date] ??= []).push(a);
    return acc;
  }, {});

  return (
    <div style={{ padding: '0 1rem 1rem' }}>
      {Object.entries(byDate).map(([date, appts]) => (
        <DayGroup key={date} date={date} appts={appts} onView={onView} />
      ))}
    </div>
  );
}

// ── Doctor-grouped table ──────────────────────────────────────────────────

interface DoctorGroupedTableProps {
  items: Appointment[];
  loading: boolean;
  onView: (uuid: string) => void;
  columns: Column<Appointment>[];
}

function DoctorGroupedTable({ items, loading, onView, columns }: DoctorGroupedTableProps) {
  if (loading) {
    return (
      <div style={{ padding: '1rem' }}>
        {Array.from({ length: 5 }).map((_, i) => (
          <div key={i} className="skeleton" style={{ height: 44, borderRadius: 6, marginBottom: 8 }} />
        ))}
      </div>
    );
  }
  if (!items.length) {
    return <p className="muted" style={{ textAlign: 'center', padding: '3rem 0', fontSize: 13.5 }}>هیچ نوبتی یافت نشد</p>;
  }

  const byDoctor = items.reduce<Record<string, Appointment[]>>((acc, a) => {
    (acc[a.doctor_name] ??= []).push(a);
    return acc;
  }, {});

  return (
    <div>
      {Object.entries(byDoctor).map(([docName, docAppts]) => (
        <div key={docName}>
          {/* Doctor header row */}
          <div style={{
            display: 'flex', alignItems: 'center', gap: 8,
            padding: '8px 16px', margin: '0',
            background: 'color-mix(in srgb, var(--primary) 7%, var(--surface))',
            borderBottom: '1px solid var(--border)', borderTop: '1px solid var(--border)',
          }}>
            <UserCircleIcon style={{ width: 16, height: 16, color: 'var(--primary)' }} />
            <span style={{ fontWeight: 700, fontSize: 13.5, color: 'var(--primary)' }}>دکتر {docName}</span>
            <span className="muted" style={{ fontSize: 12 }}>{docAppts.length} نوبت</span>
          </div>

          {/* Appointments table for this doctor */}
          <DataTable<Appointment>
            columns={columns}
            data={docAppts}
            loading={false}
            emptyMessage=""
            actions={(appt) => (
              <button className="mini-btn" onClick={() => onView(appt.uuid)} title="مشاهده">
                <EyeIcon style={{ width: 16, height: 16 }} />
              </button>
            )}
          />
        </div>
      ))}
    </div>
  );
}

// ── New Appointment Modal ─────────────────────────────────────────────────

interface NewApptModalProps {
  onClose: () => void;
  onCreated: () => void;
  defaultDoctorUuid?: string;
}

function NewAppointmentModal({ onClose, onCreated, defaultDoctorUuid }: NewApptModalProps) {
  const { primaryRole } = useAuthStore();
  const isAdmin = primaryRole === 'admin';

  const [step, setStep]                 = useState<1 | 2 | 3>(1);
  const [doctorUuid, setDoctorUuid]     = useState(defaultDoctorUuid ?? '');
  const [patientMobile, setPatientMobile] = useState('');
  const [dateStr, setDateStr]           = useState(toGregorianDate(new Date()));
  const [slots, setSlots]               = useState<Array<{ start: number; end: number; label: string }>>([]);
  const [selectedSlot, setSelectedSlot] = useState<{ start: number; end: number; label: string } | null>(null);
  const [note, setNote]                 = useState('');
  const [loadingSlots, setLoadingSlots] = useState(false);

  const fetchSlots = async () => {
    if (!doctorUuid.trim() || !dateStr) { toast.error('UUID پزشک و تاریخ را وارد کنید'); return; }
    setLoadingSlots(true);
    try {
      const res = await api.get<ApiResponse<{ slots: Array<{ start: number; end: number; label: string }> }>>(
        `/api/v1/appointment-slots?doctor_uuid=${doctorUuid.trim()}&date=${dateStr}`
      );
      const raw = (res as any)?.data?.slots ?? [];
      setSlots(raw);
      setSelectedSlot(null);
      setStep(2);
      if (!raw.length) toast.info('هیچ نوبت خالی در این تاریخ وجود ندارد');
    } catch (e: any) {
      toast.error(e.message ?? 'خطا در دریافت نوبت‌ها');
    } finally {
      setLoadingSlots(false);
    }
  };

  const createMut = useMutation({
    mutationFn: () => {
      if (!selectedSlot) throw new Error('نوبت را انتخاب کنید');
      const body: Record<string, unknown> = {
        doctor_uuid: doctorUuid.trim(),
        slot_start: selectedSlot.start,
        slot_end: selectedSlot.end,
        note: note || undefined,
      };
      if (isAdmin) {
        body.patient_mobile = patientMobile.trim();
        return api.post('/api/v1/admin/appointment', body);
      }
      return api.post('/api/v1/appointment', body);
    },
    onSuccess: () => { toast.success('نوبت با موفقیت ثبت شد'); onCreated(); onClose(); },
    onError: (e: Error) => toast.error(e.message),
  });

  const handleDateChange = (v: string) => {
    setDateStr(v); setSlots([]); setSelectedSlot(null); setStep(1);
  };

  const changeDate = (delta: number) => {
    const d = new Date(dateStr + 'T12:00:00');
    d.setDate(d.getDate() + delta);
    handleDateChange(toGregorianDate(d));
  };

  return (
    <div className="overlay" onClick={onClose}>
      <div className="modal" style={{ maxWidth: 500 }} onClick={e => e.stopPropagation()}>
        <div className="modal-head">
          <b>ثبت نوبت جدید</b>
          <button className="mini-btn" onClick={onClose}><XMarkIcon style={{ width: 16, height: 16 }} /></button>
        </div>

        <div className="modal-body" style={{ display: 'flex', flexDirection: 'column', gap: 16 }}>
          <div style={{ display: 'grid', gridTemplateColumns: '1fr 1fr', gap: 12 }}>
            <div>
              <label className="field-label">UUID پزشک *</label>
              <input
                className="input" dir="ltr" placeholder="xxxxxxxx-xxxx-..."
                value={doctorUuid}
                readOnly={!!defaultDoctorUuid}
                onChange={e => { setDoctorUuid(e.target.value); setStep(1); setSlots([]); setSelectedSlot(null); }}
              />
            </div>
            <div>
              <label className="field-label">تاریخ *</label>
              <div style={{ display: 'flex', alignItems: 'center', gap: 4 }}>
                <button className="mini-btn" onClick={() => changeDate(-1)} title="روز قبل">
                  <ChevronRightIcon style={{ width: 14, height: 14 }} />
                </button>
                <PersianDateInput
                  value={dateStr}
                  onChange={handleDateChange}
                  min={toGregorianDate(new Date())}
                  style={{ flex: 1 }}
                />
                <button className="mini-btn" onClick={() => changeDate(1)} title="روز بعد">
                  <ChevronLeftIcon style={{ width: 14, height: 14 }} />
                </button>
              </div>
            </div>
          </div>

          {isAdmin && (
            <div>
              <label className="field-label">موبایل بیمار *</label>
              <input className="input" dir="ltr" placeholder="09xxxxxxxxx" value={patientMobile} onChange={e => setPatientMobile(e.target.value)} />
            </div>
          )}

          <button
            className="btn outline sm"
            onClick={fetchSlots}
            disabled={loadingSlots || !doctorUuid.trim() || !dateStr}
            style={{ alignSelf: 'flex-start' }}
          >
            {loadingSlots ? 'در حال دریافت...' : 'دریافت نوبت‌های خالی'}
          </button>

          {step >= 2 && slots.length > 0 && (
            <div>
              <label className="field-label">انتخاب نوبت — {formatDate(dateStr)}</label>
              <div style={{ display: 'grid', gridTemplateColumns: 'repeat(4, 1fr)', gap: 8, marginTop: 6 }}>
                {slots.map((s) => (
                  <button
                    key={s.start}
                    onClick={() => { setSelectedSlot(s); setStep(3); }}
                    style={{
                      padding: '8px 4px', borderRadius: 8, fontSize: 13, fontWeight: 600, cursor: 'pointer',
                      border: selectedSlot?.start === s.start ? '2px solid var(--primary)' : '1px solid var(--border)',
                      background: selectedSlot?.start === s.start ? 'var(--primary-soft, #eef2ff)' : 'var(--surface)',
                      color: selectedSlot?.start === s.start ? 'var(--primary)' : 'var(--text)',
                      transition: 'all .15s',
                    }}
                  >
                    {s.label}
                  </button>
                ))}
              </div>
            </div>
          )}

          {step >= 2 && slots.length === 0 && (
            <p className="muted" style={{ textAlign: 'center', fontSize: 13 }}>نوبت خالی در این تاریخ وجود ندارد</p>
          )}

          {step >= 3 && (
            <div>
              <label className="field-label">یادداشت (اختیاری)</label>
              <textarea className="input" rows={2} style={{ resize: 'vertical' }} value={note} onChange={e => setNote(e.target.value)} />
            </div>
          )}
        </div>

        <div className="modal-foot">
          <button className="btn ghost sm" onClick={onClose}>انصراف</button>
          <button
            className="btn primary sm"
            disabled={!selectedSlot || createMut.isPending || (isAdmin && !patientMobile.trim())}
            onClick={() => createMut.mutate()}
          >
            {createMut.isPending ? 'در حال ثبت...' : 'ثبت نوبت'}
          </button>
        </div>
      </div>
    </div>
  );
}

// ── Main Component ────────────────────────────────────────────────────────

export default function AppointmentsPage() {
  const navigate     = useNavigate();
  const { primaryRole, dbUuid } = useAuthStore();

  const [page, setPage]               = useState(1);
  const [search, setSearch]           = useState('');
  const [statusFilter, setStatusFilter] = useState('');
  const [dateFilter, setDateFilter]   = useState('');
  const [doctorFilter, setDoctorFilter] = useState('');
  const [viewMode, setViewMode]       = useState<'table' | 'timeline'>('table');
  const [newApptOpen, setNewApptOpen] = useState(false);
  const limit = 15;

  const isAdmin  = primaryRole === 'admin';
  const isDoctor = primaryRole === 'doctor';
  const isClinic = primaryRole === 'clinic';
  const endpoint = isAdmin ? '/api/v1/admin/appointments' : '/api/v1/my/appointments';

  const { data, isLoading, refetch } = useQuery({
    queryKey: ['appointments', endpoint, page, search, statusFilter, dateFilter],
    queryFn: () => {
      const params = new URLSearchParams({ page: String(page), limit: String(limit) });
      if (search)       params.set('search', search);
      if (statusFilter) params.set('status', statusFilter);
      if (dateFilter)   params.set('date', dateFilter);
      return api.get<PaginatedResponse<Appointment>>(`${endpoint}?${params}`);
    },
  });

  const allItems = data?.data ?? [];
  const total    = data?.meta?.totalRecords ?? 0;

  // unique doctor names for clinic filter tab
  const doctorNames = useMemo(() => {
    const names = [...new Set(allItems.map(a => a.doctor_name))];
    return names.sort();
  }, [allItems]);

  const items = useMemo(() => {
    if (!doctorFilter) return allItems;
    return allItems.filter(a => a.doctor_name === doctorFilter);
  }, [allItems, doctorFilter]);

  // Show doctor grouping in clinic panel when multiple doctors exist
  const showDoctorGroup = isClinic && doctorNames.length > 1 && !doctorFilter;

  const columns: Column<Appointment>[] = [
    {
      key: 'patient',
      header: 'بیمار',
      render: (a) => (
        <div className="cell-user">
          <div className="avatar sm" style={{
            background: 'linear-gradient(145deg, oklch(0.62 0.15 222), oklch(0.48 0.16 222))',
          }}>
            {(a.patient_name ?? '؟').slice(0, 2)}
          </div>
          <div>
            <b>{a.patient_name || '—'}</b>
            <br /><small dir="ltr">{maskMobile(a.patient_mobile)}</small>
          </div>
        </div>
      ),
    },
    ...(!showDoctorGroup ? [{ key: 'doctor_name' as keyof Appointment, header: 'پزشک', render: (a: Appointment) => `دکتر ${a.doctor_name}` }] : []),
    { key: 'clinic_name', header: 'کلینیک', render: (a) => <span className="muted">{a.clinic_name ?? '—'}</span> },
    {
      key: 'appointment_date',
      header: 'تاریخ و ساعت',
      render: (a) => (
        <div>
          <span style={{ fontWeight: 600 }}>{formatDate(a.appointment_date)}</span>
          <br />
          <small className="muted" style={{ direction: 'ltr', display: 'inline-block' }}>{a.appointment_time}</small>
        </div>
      ),
    },
    {
      key: 'status',
      header: 'وضعیت',
      render: (a) => <ApptStatus status={a.status} />,
    },
    {
      key: 'created_at',
      header: 'ثبت در',
      render: (a) => <span className="muted" style={{ fontSize: 12 }}>{formatDate(a.created_at)}</span>,
    },
  ];

  const pageTitle = isAdmin ? 'نوبت‌ها'
    : isDoctor ? 'نوبت‌های من'
    : primaryRole === 'secretary' ? 'نوبت‌های پزشک'
    : 'نوبت‌های کلینیک';

  const statCards = [
    { label: 'کل نوبت‌ها', value: total > 0 ? String(total) : null, bg: 'var(--info-bg)',    color: 'var(--info)',    Icon: CalendarIcon },
    { label: 'در انتظار',   value: null,                              bg: 'var(--warning-bg)', color: 'var(--warning)', Icon: ClockIcon },
    { label: 'ویزیت شده',   value: null,                              bg: 'var(--success-bg)', color: 'var(--success)', Icon: CheckCircleIcon },
    { label: 'لغو شده',     value: null,                              bg: 'var(--danger-bg)',  color: 'var(--danger)',  Icon: XCircleIcon },
  ];

  return (
    <div className="fade-in">
      {/* Header */}
      <div className="card-title-row" style={{ marginBottom: 'var(--gap)' }}>
        <div>
          <h1 className="section-title">{pageTitle}</h1>
          <div className="muted" style={{ fontSize: 13, marginTop: 3 }}>مدیریت و پیگیری نوبت‌های درمانی</div>
        </div>
        <button className="btn primary sm" onClick={() => setNewApptOpen(true)}>
          <PlusIcon style={{ width: 15, height: 15 }} />
          ثبت نوبت جدید
        </button>
      </div>

      {/* Stat cards */}
      <div className="stat-grid" style={{ gridTemplateColumns: 'repeat(4,1fr)' }}>
        {statCards.map((c) => (
          <div key={c.label} className="stat">
            <div className="ico" style={{ background: c.bg, color: c.color }}>
              <c.Icon style={{ width: 20, height: 20 }} />
            </div>
            <div className="lbl">{c.label}</div>
            <div className="val">
              {isLoading
                ? <span className="skeleton" style={{ display: 'inline-block', width: 48, height: 26, borderRadius: 4 }} />
                : c.value ?? '—'}
            </div>
          </div>
        ))}
      </div>

      {/* Main card */}
      <div className="card">
        <div className="card-pad" style={{ paddingBottom: 0 }}>

          {/* Doctor filter tabs — only for clinic with multiple doctors */}
          {isClinic && doctorNames.length > 1 && (
            <div style={{
              display: 'flex', gap: 6, flexWrap: 'wrap',
              marginBottom: 14, paddingBottom: 14, borderBottom: '1px solid var(--border)',
            }}>
              <button
                onClick={() => setDoctorFilter('')}
                className={`btn sm ${!doctorFilter ? 'primary' : 'ghost'}`}
                style={{ fontSize: 12 }}
              >
                همه پزشکان
              </button>
              {doctorNames.map(name => (
                <button
                  key={name}
                  onClick={() => setDoctorFilter(name)}
                  className={`btn sm ${doctorFilter === name ? 'primary' : 'ghost'}`}
                  style={{ fontSize: 12 }}
                >
                  دکتر {name}
                </button>
              ))}
            </div>
          )}

          <div className="toolbar" style={{ flexWrap: 'wrap', gap: 10 }}>
            <div className="field" style={{ minWidth: 220 }}>
              <MagnifyingGlassIcon style={{ width: 17, height: 17 }} />
              <input
                placeholder="جستجو (موبایل / نام)..."
                value={search}
                onChange={(e) => { setSearch(e.target.value); setPage(1); }}
              />
            </div>

            <PersianDateInput
              value={dateFilter}
              onChange={(v) => { setDateFilter(v); setPage(1); }}
              placeholder="فیلتر تاریخ"
            />

            <select
              value={statusFilter}
              onChange={(e) => { setStatusFilter(e.target.value); setPage(1); }}
              style={{
                height: 36, padding: '0 10px', borderRadius: 'var(--r-sm)', border: '1px solid var(--border)',
                background: 'var(--surface)', color: 'var(--text)', fontSize: 13, cursor: 'pointer',
              }}
            >
              {STATUS_FILTERS.map(f => (
                <option key={f.value} value={f.value}>{f.label}</option>
              ))}
            </select>

            <div style={{ marginRight: 'auto' }} />

            <div className="seg">
              <button className={viewMode === 'table' ? 'on' : ''} onClick={() => setViewMode('table')} title="نمای جدول">
                <TableCellsIcon style={{ width: 15, height: 15 }} />
              </button>
              <button className={viewMode === 'timeline' ? 'on' : ''} onClick={() => setViewMode('timeline')} title="نمای زمانی">
                <CalendarViewIcon style={{ width: 15, height: 15 }} />
              </button>
            </div>
          </div>
        </div>

        {viewMode === 'table' ? (
          <>
            {showDoctorGroup ? (
              <DoctorGroupedTable
                items={items}
                loading={isLoading}
                onView={(uuid) => navigate(`/admin/appointments/${uuid}`)}
                columns={columns}
              />
            ) : (
              <DataTable<Appointment>
                columns={columns}
                data={items}
                loading={isLoading}
                emptyMessage="هیچ نوبتی یافت نشد"
                actions={(appt) => (
                  <button className="mini-btn" onClick={() => navigate(`/admin/appointments/${appt.uuid}`)} title="مشاهده">
                    <EyeIcon style={{ width: 16, height: 16 }} />
                  </button>
                )}
              />
            )}
            <Pagination page={page} total={total} limit={limit} onPageChange={setPage} />
          </>
        ) : (
          <>
            <TimelineView
              items={items}
              loading={isLoading}
              onView={(uuid) => navigate(`/admin/appointments/${uuid}`)}
              groupByDoctor={showDoctorGroup}
            />
            <Pagination page={page} total={total} limit={limit} onPageChange={setPage} />
          </>
        )}
      </div>

      {newApptOpen && (
        <NewAppointmentModal
          onClose={() => setNewApptOpen(false)}
          onCreated={refetch}
          defaultDoctorUuid={isDoctor ? (dbUuid ?? '') : ''}
        />
      )}
    </div>
  );
}