"use client";

import Link from "next/link";
import { useCallback, useEffect, useState } from "react";
import { adminApi, errMessage, type FundProduct } from "@/lib/admin-api";
import { isAdvisor } from "@/lib/roles";
import type { UserPayload } from "@/types/api";
import {
  Badge,
  Button,
  Card,
  EmptyState,
  ErrorState,
  LoadingBlock,
  Pagination,
  SearchInput,
  Select,
  TableWrap,
  Td,
  Th,
  statusTone,
} from "@/components/admin/ui";

const RISK_OPTIONS = [
  { value: "", label: "全部风险等级" },
  { value: "低风险", label: "低风险" },
  { value: "中低风险", label: "中低风险" },
  { value: "中风险", label: "中风险" },
  { value: "中高风险", label: "中高风险" },
  { value: "高风险", label: "高风险" },
];

export function FundsSection({ user }: { user: UserPayload }) {
  const advisor = isAdvisor(user);
  const [items, setItems] = useState<FundProduct[]>([]);
  const [total, setTotal] = useState(0);
  const [totalPages, setTotalPages] = useState(0);
  const [page, setPage] = useState(1);
  const [keyword, setKeyword] = useState("");
  const [riskLevel, setRiskLevel] = useState("");
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState("");

  const load = useCallback(async () => {
    setLoading(true);
    setError("");
    try {
      const result = advisor
        ? await adminApi.funds({ keyword: keyword || undefined, risk_level: riskLevel || undefined, page, page_size: 10 })
        : await adminApi.products({ keyword: keyword || undefined, page, page_size: 10 });
      setItems(result.items ?? []);
      setTotal(result.total ?? 0);
      setTotalPages(result.total_pages ?? 0);
    } catch (e) {
      setError(errMessage(e, "基金数据加载失败"));
    } finally {
      setLoading(false);
    }
  }, [advisor, keyword, riskLevel, page]);

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

  return (
    <Card
      title="基金数据"
      description={advisor ? "白名单在售产品" : "全部在售基金产品"}
      bodyClassName="p-0"
      actions={
        <Link href="/products" className="text-sm font-medium text-indigo-600 hover:underline">
          在官网查看
        </Link>
      }
    >
      <div className="flex flex-wrap items-center gap-3 border-b border-slate-100 p-4">
        <SearchInput
          className="w-64"
          placeholder="搜索基金名称或代码"
          value={keyword}
          onChange={(event) => {
            setKeyword(event.target.value);
            setPage(1);
          }}
        />
        {advisor && (
          <Select value={riskLevel} onChange={(event) => { setRiskLevel(event.target.value); setPage(1); }}>
            {RISK_OPTIONS.map((option) => (
              <option key={option.value} value={option.value}>
                {option.label}
              </option>
            ))}
          </Select>
        )}
        <Button size="sm" className="ml-auto" onClick={() => void load()} loading={loading}>
          查询
        </Button>
      </div>

      {loading ? (
        <LoadingBlock />
      ) : error ? (
        <ErrorState message={error} onRetry={() => void load()} />
      ) : items.length === 0 ? (
        <EmptyState text="没有匹配的基金产品" />
      ) : (
        <>
          <TableWrap>
            <thead>
              <tr>
                <Th>基金代码</Th>
                <Th>基金名称</Th>
                <Th>类型</Th>
                <Th>风险等级</Th>
                <Th className="text-right">最新净值</Th>
                <Th>净值日期</Th>
                <Th>基金经理</Th>
                <Th>状态</Th>
                <Th className="text-right">操作</Th>
              </tr>
            </thead>
            <tbody className="divide-y divide-slate-50">
              {items.map((fund) => (
                <tr key={fund.id} className="transition-colors hover:bg-slate-50">
                  <Td className="font-medium text-slate-900">{fund.product_code}</Td>
                  <Td>{fund.product_name}</Td>
                  <Td>{fund.product_type}</Td>
                  <Td>{fund.risk_level}</Td>
                  <Td className="text-right">{fund.nav?.toFixed(4) ?? "--"}</Td>
                  <Td className="text-xs text-slate-500">{fund.nav_date ?? "--"}</Td>
                  <Td>{fund.fund_manager ?? "--"}</Td>
                  <Td>
                    <Badge tone={statusTone(fund.status)}>{fund.status}</Badge>
                  </Td>
                  <Td>
                    <Link
                      href={`/products/${fund.product_code}`}
                      className="block text-right text-sm text-indigo-600 hover:underline"
                    >
                      详情
                    </Link>
                  </Td>
                </tr>
              ))}
            </tbody>
          </TableWrap>
          <Pagination page={page} totalPages={totalPages} total={total} onChange={setPage} />
        </>
      )}
    </Card>
  );
}