import { useCallback, useEffect, useMemo, useState } from 'react';
import { Link, useNavigate } from 'react-router-dom';
import PageHeader from '@dukang/shared-ui/PageHeader';
import PullToRefresh from '@dukang/shared-ui/PullToRefresh';
import { isLoggedIn, request } from '../lib/api';
import { usePartnerSession } from '../contexts/PartnerSessionContext';
import { hasWarehouseAccess } from '../lib/partnerAccess';
import { usePartnerPageView } from '../lib/usePageView';

type DateFilter = 'today' | '7d' | '30d';
type StatusFilter = 'ALL' | 'PENDING_SHIP' | 'SHIPPING' | 'COMPLETED' | 'ABNORMAL';

function orderStatusLabel(status: string) {
  const s = String(status).toUpperCase();
  if (s.includes('SHIP') || s === 'OUT_WAREHOUSE') return { label: '运输中', color: 'var(--color-status-blue)' };
  if (s === 'COMPLETED') return { label: '已完成', color: 'var(--color-success-green)' };
  if (s.includes('PENDING') || s === 'PAID') return { label: '待发货', color: 'var(--color-secondary)' };
  if (s.includes('ERROR') || s.includes('ABNORMAL')) return { label: '异常', color: 'var(--color-error)' };
  return { label: status, color: 'var(--color-subtle-gray)' };
}

const DATE_FILTERS: { key: DateFilter; label: string }[] = [
  { key: 'today', label: '今日' },
  { key: '7d', label: '近7天' },
  { key: '30d', label: '近30天' },
];

const STATUS_FILTERS: { key: StatusFilter; label: string }[] = [
  { key: 'ALL', label: '全部' },
  { key: 'PENDING_SHIP', label: '待发货' },
  { key: 'SHIPPING', label: '运输中' },
  { key: 'COMPLETED', label: '已完成' },
  { key: 'ABNORMAL', label: '异常' },
];

type OrderListPageProps = {
  /** Tab 根页：无返回顶栏 */
  tabRoot?: boolean;
};

type OrdersResponse = {
  list: Array<Record<string, unknown>>;
  hasWarehouseAccess?: boolean;
  message?: string;
};

export default function OrderListPage({ tabRoot = false }: OrderListPageProps) {
  usePartnerPageView('partner_order_list_view');
  const navigate = useNavigate();
  const { account } = usePartnerSession();
  const warehouseOk = hasWarehouseAccess(account);
  const [data, setData] = useState<OrdersResponse>({ list: [] });
  const [tab, setTab] = useState<'orders' | 'coupons'>('orders');
  const [dateFilter, setDateFilter] = useState<DateFilter>('today');
  const [statusFilter, setStatusFilter] = useState<StatusFilter>('ALL');
  const [shippingId, setShippingId] = useState<string | null>(null);
  const [shipForm, setShipForm] = useState({ logisticsCompany: '', trackingNo: '', manualQueryUrl: '' });
  const [shipModalId, setShipModalId] = useState<string | null>(null);
  const [loaded, setLoaded] = useState(false);

  useEffect(() => {
    document.title = '订单管理';
  }, []);

  const loadOrders = useCallback(() => {
    if (!isLoggedIn()) {
      navigate('/login');
      return Promise.resolve();
    }
    if (!warehouseOk) {
      setData({ list: [], hasWarehouseAccess: false, message: '未配置仓库管理权限' });
      setLoaded(true);
      return Promise.resolve();
    }
    return request<OrdersResponse>('PARTNER_H5', '/partner/orders')
      .then((res) => {
        setData({
          list: Array.isArray(res.list) ? res.list : [],
          hasWarehouseAccess: res.hasWarehouseAccess,
          message: res.message,
        });
      })
      .catch(() => setData({ list: [] }))
      .finally(() => setLoaded(true));
  }, [navigate, warehouseOk]);

  useEffect(() => {
    void loadOrders();
  }, [loadOrders]);

  const filtered = useMemo(() => data.list.filter((o) => {
    if (statusFilter === 'ALL') return true;
    const s = String(o.status).toUpperCase();
    if (statusFilter === 'PENDING_SHIP') return s.includes('PENDING') || s === 'PAID';
    if (statusFilter === 'SHIPPING') return s.includes('SHIP') || s === 'OUT_WAREHOUSE';
    if (statusFilter === 'COMPLETED') return s === 'COMPLETED';
    if (statusFilter === 'ABNORMAL') return s.includes('ERROR') || s.includes('ABNORMAL');
    return true;
  }), [data.list, statusFilter]);

  async function handleShip(orderId: string, e: React.MouseEvent) {
    e.preventDefault();
    e.stopPropagation();
    setShipModalId(orderId);
    setShipForm({ logisticsCompany: '', trackingNo: '', manualQueryUrl: '' });
  }

  async function submitManualShip() {
    if (!shipModalId) return;
    if (!shipForm.logisticsCompany.trim() || !shipForm.trackingNo.trim()) {
      window.alert('请填写快递公司和运单号');
      return;
    }
    setShippingId(shipModalId);
    try {
      await request('PARTNER_H5', `/partner/orders/${shipModalId}/manual-ship`, {
        method: 'POST',
        body: JSON.stringify(shipForm),
      });
      setShipModalId(null);
      const next = await request<OrdersResponse>('PARTNER_H5', '/partner/orders');
      setData({
        list: Array.isArray(next.list) ? next.list : [],
        hasWarehouseAccess: next.hasWarehouseAccess,
        message: next.message,
      });
    } catch (err) {
      window.alert(err instanceof Error ? err.message : '发货失败');
    } finally {
      setShippingId(null);
    }
  }

  function canShip(status: string) {
    const s = status.toUpperCase();
    return s.includes('PENDING') || s === 'PAID' || s === 'PENDING_SHIP';
  }

  if (loaded && !warehouseOk) {
    return (
      <div className={`page partner-orders-page${tabRoot ? '' : ' page-no-tab'}`}>
        {!tabRoot && <PageHeader title="订单中心" onBack={() => navigate('/')} />}
        <div className="partner-warehouse-denied" style={{ margin: 20, padding: 32, textAlign: 'center' }}>
          <span className="material-symbols-outlined text-primary" style={{ fontSize: 40 }}>warehouse</span>
          <p className="headline-md" style={{ marginTop: 12 }}>未配置仓库管理权限</p>
          <p className="body-md text-muted" style={{ marginTop: 8, lineHeight: 1.6 }}>
            购酒订单由总部履约，不会推送到本账号。如需管仓发货，请联系总部配置仓库。
          </p>
        </div>
      </div>
    );
  }

  return (
    <PullToRefresh onRefresh={loadOrders} className={`page partner-orders-page${tabRoot ? '' : ' page-no-tab'}`}>
      {!tabRoot && <PageHeader title="订单中心" onBack={() => navigate('/')} />}

      <div className="partner-segment">
        <button type="button" className={tab === 'orders' ? 'active' : ''} onClick={() => setTab('orders')}>订单列表</button>
        {!tabRoot && (
          <button type="button" className={tab === 'coupons' ? 'active' : ''} onClick={() => setTab('coupons')}>权益记录</button>
        )}
      </div>

      {tab === 'orders' && (
        <>
          <div className="partner-filter-row" style={{ marginBottom: 8 }}>
            {DATE_FILTERS.map((f) => (
              <button key={f.key} type="button" className={`partner-chip${dateFilter === f.key ? ' active' : ''}`} style={{ border: dateFilter === f.key ? 'none' : '1px solid var(--color-outline-variant)', background: dateFilter === f.key ? undefined : '#fff' }} onClick={() => setDateFilter(f.key)}>
                {f.label}
              </button>
            ))}
          </div>
          <div className="partner-filter-row" style={{ borderBottom: '1px solid var(--color-surface-container-high)', paddingBottom: 8, marginBottom: 16 }}>
            {STATUS_FILTERS.map((f) => (
              <button key={f.key} type="button" className={`partner-filter-tab${statusFilter === f.key ? ' active' : ''}`} onClick={() => setStatusFilter(f.key)}>
                {f.label}
              </button>
            ))}
          </div>

          {filtered.length === 0 && <div className="empty">暂无订单</div>}

          {filtered.map((o) => {
            const st = orderStatusLabel(String(o.status));
            const payAmount = Number(o.payAmount || 0);
            const orderId = String(o.id);
            return (
              <div key={orderId} className="partner-order-card-wrap">
                <Link to={`/orders/${orderId}`} className="partner-order-card">
                  <div className="partner-order-card-top">
                    <span className="label-md text-muted">NO. {String(o.orderNo)}</span>
                    <span className="label-md" style={{ color: st.color, fontWeight: 600 }}>{st.label}</span>
                  </div>
                  <div className="partner-order-product">
                    <div className="partner-order-product-img" style={{ display: 'flex', alignItems: 'center', justifyContent: 'center' }}>
                      <span className="material-symbols-outlined text-muted">liquor</span>
                    </div>
                    <div style={{ flex: 1, minWidth: 0 }}>
                      <h3 className="headline-md line-2-clamp">{String(o.productName || '杜康好酒')}</h3>
                      <p className="text-variant body-md" style={{ marginTop: 4 }}>¥{payAmount.toFixed(2)}</p>
                    </div>
                  </div>
                  <div className="partner-order-address">
                    <span className="material-symbols-outlined" style={{ fontSize: 18 }}>location_on</span>
                    <p className="line-2-clamp">{String(o.receiverAddress || '收货地址')}</p>
                  </div>
                </Link>
                {canShip(String(o.status)) && !(o.delivery as { trackingNo?: string } | undefined)?.trackingNo && (
                  <button
                    type="button"
                    className="partner-order-ship-btn"
                    disabled={shippingId === orderId}
                    onClick={(e) => void handleShip(orderId, e)}
                  >
                    填写运单
                  </button>
                )}
              </div>
            );
          })}
        </>
      )}

      {tab === 'coupons' && !tabRoot && (
        <div style={{ padding: '0 20px' }}>
          <div className="partner-revenue-card" style={{ marginBottom: 16 }}>
            <p className="partner-revenue-label">累计已发放权益金额</p>
            <div className="partner-revenue-amount" style={{ fontSize: 28 }}>42,800.00</div>
          </div>
          <p className="text-muted body-md text-center">权益记录 preV1 占位</p>
        </div>
      )}

      {shipModalId && (
        <div className="partner-ship-modal-backdrop" role="presentation" onClick={() => setShipModalId(null)}>
          <div className="partner-ship-modal" role="dialog" onClick={(e) => e.stopPropagation()}>
            <h3 className="headline-md">填写运单</h3>
            <label className="partner-ship-field">
              <span>快递公司</span>
              <input
                value={shipForm.logisticsCompany}
                onChange={(e) => setShipForm((f) => ({ ...f, logisticsCompany: e.target.value }))}
                placeholder="如 顺丰速运"
              />
            </label>
            <label className="partner-ship-field">
              <span>运单号</span>
              <input
                value={shipForm.trackingNo}
                onChange={(e) => setShipForm((f) => ({ ...f, trackingNo: e.target.value }))}
              />
            </label>
            <label className="partner-ship-field">
              <span>查询链接（可选）</span>
              <input
                value={shipForm.manualQueryUrl}
                onChange={(e) => setShipForm((f) => ({ ...f, manualQueryUrl: e.target.value }))}
                placeholder="https://..."
              />
            </label>
            <div className="partner-ship-actions">
              <button type="button" className="partner-btn-secondary" onClick={() => setShipModalId(null)}>
                取消
              </button>
              <button
                type="button"
                className="partner-btn-primary"
                disabled={shippingId === shipModalId}
                onClick={() => void submitManualShip()}
              >
                {shippingId === shipModalId ? '提交中…' : '确认发货'}
              </button>
            </div>
          </div>
        </div>
      )}
    </PullToRefresh>
  );
}