import { useCallback, useEffect, useMemo, useState } from 'react';
import { Link } from 'react-router-dom';
import type { PartnerBillDto } from '@dukang/shared-types';
import { isWxAuthorizeEnabled } from '@dukang/shared-types';
import PullToRefresh from '@dukang/shared-ui/PullToRefresh';
import { request } from '../lib/api';
import { usePartnerSession } from '../contexts/PartnerSessionContext';
import { contactSupport } from '../lib/contact';
import { isPrimaryAccount } from '../lib/partnerAccess';
import { listPartnerStaff } from '../lib/staff';
import { toastError, toastSuccess } from '../lib/toast';
import {
  authorizePartnerWechat,
  fetchClientConfig,
  handlePartnerWechatLoginResult,
} from '../lib/wechat-auth';
import { isWechatEnv } from '../lib/weixin';

type CenterPageProps = {
  /** 子账号个人中心复用 */
  variant?: 'primary' | 'sub';
  roleLabel?: string;
};

function fmtMoney(n: number) {
  return n.toLocaleString('zh-CN', { minimumFractionDigits: 2, maximumFractionDigits: 2 });
}

export default function CenterPage({ variant = 'primary', roleLabel }: CenterPageProps) {
  const { account, logout, refresh, applySession } = usePartnerSession();
  const isPrimary = variant === 'primary' && isPrimaryAccount(account);
  const [authorizing, setAuthorizing] = useState(false);
  const [bills, setBills] = useState<PartnerBillDto[]>([]);
  const [staffCount, setStaffCount] = useState(0);

  useEffect(() => {
    document.title = isPrimary ? '合伙人中心' : '个人中心';
  }, [isPrimary]);

  const loadCenter = useCallback(() => {
    const tasks: Promise<unknown>[] = [Promise.resolve(refresh())];
    if (isPrimary) {
      tasks.push(
        request<PartnerBillDto[]>('PARTNER_H5', '/partner/settlement/bills')
          .then(setBills)
          .catch(() => setBills([])),
        listPartnerStaff()
          .then((list) => setStaffCount(list.length))
          .catch(() => setStaffCount(0)),
      );
    }
    return Promise.all(tasks).then(() => undefined);
  }, [isPrimary, refresh]);

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

  const finance = useMemo(() => {
    const pending = bills.filter((b) => b.status === 'AWAITING_CONFIRM');
    const settled = bills.filter((b) => b.status === 'PAID');
    const paidCount = settled.length;
    const rejectedCount = bills.filter((b) => b.status === 'REJECTED').length;
    return {
      pendingBillCount: pending.length,
      rejectedCount,
      pendingTotal: bills
        .filter((b) => b.status === 'AWAITING_CONFIRM' || b.status === 'UNPAID' || b.status === 'REJECTED')
        .reduce((s, b) => s + Number(b.totalAmount || 0), 0),
      settledTotal: settled.reduce((s, b) => s + Number(b.totalAmount || 0), 0),
      balance: settled.reduce((s, b) => s + Number(b.totalAmount || 0), 0),
      paidCount,
    };
  }, [bills]);

  function handleContactPartner() {
    if (isPrimary) {
      if (!contactSupport()) toastError('暂无客服电话');
      return;
    }
    if (!account?.primaryPhone) {
      toastError('暂无合伙人联系方式');
      return;
    }
    window.location.href = `tel:${account.primaryPhone}`;
  }

  async function handleAvatarAuth() {
    if (authorizing) return;
    if (!isWechatEnv()) {
      toastError('请在微信内打开以授权头像昵称');
      return;
    }
    setAuthorizing(true);
    try {
      const config = await fetchClientConfig();
      if (!isWxAuthorizeEnabled(config)) {
        toastError('微信授权暂未开启');
        return;
      }
      const result = await authorizePartnerWechat();
      if (result) {
        const session = handlePartnerWechatLoginResult(result);
        if (session) applySession(session);
        await refresh();
        toastSuccess('微信授权成功');
      }
      // result 为空表示已跳转 OAuth，无需额外处理
    } catch (e) {
      toastError(e instanceof Error ? e.message : '微信授权失败');
    } finally {
      setAuthorizing(false);
    }
  }

  const locationLabel = [account?.companyName].filter(Boolean).join(' · ') || '—';
  const displayName = account?.wxNickname?.trim() || account?.name || '合伙人';
  const avatarUrl = account?.wxAvatarUrl?.trim() || '';
  const badgeLabel = roleLabel || (isPrimary ? '城市合伙人' : '拓店员');

  return (
    <PullToRefresh onRefresh={loadCenter} className="page partner-center-page partner-home--flush-top">
      <section className="partner-profile-card">
        <button
          type="button"
          className="partner-profile-avatar"
          onClick={() => void handleAvatarAuth()}
          disabled={authorizing}
          aria-label={avatarUrl ? '更新微信头像' : '微信授权获取头像'}
        >
          {avatarUrl ? (
            <img src={avatarUrl} alt="" className="partner-profile-avatar-img" referrerPolicy="no-referrer" />
          ) : (
            <span className="material-symbols-outlined">person</span>
          )}
          {!avatarUrl && (
            <span className="partner-profile-avatar-hint">授权</span>
          )}
        </button>
        <div className="partner-profile-main">
          <div className="partner-profile-title-row">
            <h2 className="partner-profile-name">{displayName}</h2>
            <span className="partner-role-badge">{badgeLabel}</span>
          </div>
          <div className="partner-profile-location">
            <span className="material-symbols-outlined" style={{ fontSize: 16 }}>location_on</span>
            <span className="body-md line-2-clamp">{locationLabel}</span>
          </div>
          {!isPrimary && (
            <p className="label-md text-muted" style={{ marginTop: 4 }}>{account?.phone || ''}</p>
          )}
        </div>
      </section>

      {isPrimary && (
        <>
          <section className="partner-assets-section">
            <div className="partner-section-head">
              <h3 className="headline-md">资产概览</h3>
              <Link to="/center/settlement" className="label-md text-primary" style={{ display: 'flex', alignItems: 'center', gap: 2 }}>
                明细 <span className="material-symbols-outlined" style={{ fontSize: 14 }}>chevron_right</span>
              </Link>
            </div>

            {finance.pendingBillCount > 0 && (
              <Link to="/center/bills" className="partner-bills-banner">
                <div className="partner-bills-banner-left">
                  <div className="partner-bills-icon">
                    <span className="material-symbols-outlined">receipt_long</span>
                  </div>
                  <div>
                    <p className="body-md text-primary" style={{ fontWeight: 600 }}>
                      {finance.rejectedCount > 0 ? '待处理账单' : '待确认账单'}
                    </p>
                    <p className="label-md text-primary" style={{ opacity: 0.85 }}>
                      {finance.rejectedCount > 0
                        ? `您有 ${finance.pendingBillCount} 笔账单待处理（含 ${finance.rejectedCount} 笔已驳回）`
                        : `您有 ${finance.pendingBillCount} 笔账单待确认`}
                    </p>
                  </div>
                </div>
                <span className="material-symbols-outlined text-primary">chevron_right</span>
              </Link>
            )}

            <div className="partner-finance-grid">
              <div className="partner-finance-card partner-finance-card--hero">
                <p className="partner-finance-hero-label">账户余额 (元)</p>
                <p className="partner-finance-hero-amount">{fmtMoney(finance.balance)}</p>
              </div>
              <Link to="/center/settlement" className="partner-finance-card">
                <p className="label-md text-muted">待结算</p>
                <p className="partner-finance-value text-primary">¥ {fmtMoney(finance.pendingTotal)}</p>
              </Link>
              <Link to="/center/settlement" className="partner-finance-card">
                <p className="label-md text-muted" style={{ display: 'flex', alignItems: 'center', gap: 4 }}>
                  提现记录
                  <span className="material-symbols-outlined" style={{ fontSize: 14 }}>history</span>
                </p>
                <p className="partner-finance-value">{finance.paidCount} 笔</p>
              </Link>
            </div>
          </section>

          <section className="partner-menu-section">
            <div className="partner-section-head">
              <h3 className="headline-md">运营管理</h3>
            </div>
            <div className="partner-menu-card">
              <Link to="/center/staff" className="partner-menu-item">
                <div className="partner-menu-item-left">
                  <div className="partner-menu-icon">
                    <span className="material-symbols-outlined">badge</span>
                  </div>
                  <span className="body-md" style={{ fontSize: 16 }}>我的员工</span>
                </div>
                <div className="partner-menu-item-right">
                  {staffCount > 0 && <span className="partner-menu-badge">{staffCount}人</span>}
                  <span className="material-symbols-outlined text-muted">chevron_right</span>
                </div>
              </Link>
              <Link to="/center/proxy-orders" className="partner-menu-item">
                <div className="partner-menu-item-left">
                  <div className="partner-menu-icon">
                    <span className="material-symbols-outlined">receipt_long</span>
                  </div>
                  <span className="body-md" style={{ fontSize: 16 }}>代下单列表</span>
                </div>
                <span className="material-symbols-outlined text-muted">chevron_right</span>
              </Link>
              <Link to="/stores?audit=pending" className="partner-menu-item">
                <div className="partner-menu-item-left">
                  <div className="partner-menu-icon">
                    <span className="material-symbols-outlined">storefront</span>
                  </div>
                  <span className="body-md" style={{ fontSize: 16 }}>门店审核记录</span>
                </div>
                <span className="material-symbols-outlined text-muted">chevron_right</span>
              </Link>
              <Link to="/stores" className="partner-menu-item">
                <div className="partner-menu-item-left">
                  <div className="partner-menu-icon">
                    <span className="material-symbols-outlined">description</span>
                  </div>
                  <span className="body-md" style={{ fontSize: 16 }}>合同管理</span>
                </div>
                <div className="partner-menu-item-right">
                  <span className="partner-menu-status">待续约</span>
                  <span className="material-symbols-outlined text-muted">chevron_right</span>
                </div>
              </Link>
              <button
                type="button"
                className="partner-menu-item"
                onClick={() => { if (!contactSupport()) toastError('暂无客服电话'); }}
              >
                <div className="partner-menu-item-left">
                  <div className="partner-menu-icon">
                    <span className="material-symbols-outlined">support_agent</span>
                  </div>
                  <span className="body-md" style={{ fontSize: 16 }}>联系客服</span>
                </div>
                <span className="material-symbols-outlined text-muted">chevron_right</span>
              </button>
            </div>
          </section>
        </>
      )}

      {!isPrimary && (
        <section className="partner-menu-section">
          <div className="partner-menu-card">
            <Link to="/leaderboard" className="partner-menu-item">
              <div className="partner-menu-item-left">
                <div className="partner-menu-icon">
                  <span className="material-symbols-outlined">emoji_events</span>
                </div>
                <span className="body-md" style={{ fontSize: 16 }}>团队贡献榜</span>
              </div>
              <span className="material-symbols-outlined text-muted">chevron_right</span>
            </Link>
            <button type="button" className="partner-menu-item" onClick={() => { if (!contactSupport()) toastError('暂无客服电话'); }}>
              <div className="partner-menu-item-left">
                <div className="partner-menu-icon"><span className="material-symbols-outlined">support_agent</span></div>
                <span className="body-md" style={{ fontSize: 16 }}>联系客服</span>
              </div>
              <span className="material-symbols-outlined text-muted">chevron_right</span>
            </button>
            <button type="button" className="partner-menu-item" onClick={handleContactPartner}>
              <div className="partner-menu-item-left">
                <div className="partner-menu-icon"><span className="material-symbols-outlined">call</span></div>
                <span className="body-md" style={{ fontSize: 16 }}>联系合伙人</span>
              </div>
              <span className="material-symbols-outlined text-muted">chevron_right</span>
            </button>
          </div>
        </section>
      )}

      <button type="button" className="partner-logout-btn" onClick={logout}>
        <span className="material-symbols-outlined">logout</span>
        退出登录
      </button>

      <div className="partner-center-footer">
        <p className="label-md text-muted">传承千年 · 杜康好客</p>
      </div>
    </PullToRefresh>
  );
}