"use client";

import { useMemo, useState } from "react";
import { Eye, Filter, Search } from "lucide-react";

import { Badge } from "@/components/ui/badge";
import { Button } from "@/components/ui/button";
import { Dialog } from "@/components/ui/dialog";
import { Input } from "@/components/ui/input";
import { Select } from "@/components/ui/select";
import { Table } from "@/components/ui/table";

export type CmsRecordTone = "success" | "warning" | "danger" | "secondary";

export type CmsRecord = {
  id: string;
  title: string;
  owner: string;
  status: string;
  statusTone: CmsRecordTone;
  category: string;
  updatedAt: string;
  priority: "高" | "中" | "低";
  summary: string;
};

type CmsModuleClientProps = {
  records: CmsRecord[];
};

const PAGE_SIZE = 5;
const ALL_STATUS = "全部状态";

function matchesRecord(record: CmsRecord, query: string, status: string): boolean {
  const normalizedQuery = query.trim().toLowerCase();
  const matchesSearch =
    normalizedQuery.length === 0 ||
    [record.title, record.owner, record.category, record.summary]
      .join(" ")
      .toLowerCase()
      .includes(normalizedQuery);
  const matchesStatus = status === ALL_STATUS || record.status === status;

  return matchesSearch && matchesStatus;
}

export function CmsModuleClient({ records }: CmsModuleClientProps): React.ReactElement {
  const [query, setQuery] = useState("");
  const [status, setStatus] = useState(ALL_STATUS);
  const [page, setPage] = useState(1);
  const [selectedRecord, setSelectedRecord] = useState<CmsRecord | null>(null);

  const statusOptions = useMemo(() => {
    const uniqueStatuses = new Set(records.map((record) => record.status));
    return [ALL_STATUS, ...Array.from(uniqueStatuses)];
  }, [records]);

  const filteredRecords = useMemo(
    () => records.filter((record) => matchesRecord(record, query, status)),
    [query, records, status],
  );
  const pageCount = Math.max(1, Math.ceil(filteredRecords.length / PAGE_SIZE));
  const safePage = Math.min(page, pageCount);
  const pageStart = (safePage - 1) * PAGE_SIZE;
  const visibleRecords = filteredRecords.slice(pageStart, pageStart + PAGE_SIZE);
  const highPriorityCount = filteredRecords.filter((record) => record.priority === "高").length;

  function updateQuery(value: string): void {
    setQuery(value);
    setPage(1);
  }

  function updateStatus(value: string): void {
    setStatus(value);
    setPage(1);
  }

  return (
    <section className="rounded-lg border bg-card">
      <div className="flex flex-col gap-4 border-b p-5 lg:flex-row lg:items-end lg:justify-between">
        <div>
          <h2 className="text-base font-semibold">数据列表</h2>
          <p className="mt-1 text-sm text-muted-foreground">
            共 {filteredRecords.length} 条记录，{highPriorityCount} 条高优先级已标记。
          </p>
        </div>
        <div className="grid gap-2 sm:grid-cols-[minmax(220px,1fr)_160px]">
          <label className="relative block">
            <Search className="pointer-events-none absolute left-3 top-1/2 size-4 -translate-y-1/2 text-muted-foreground" />
            <Input
              className="pl-9"
              onChange={(event) => updateQuery(event.target.value)}
              placeholder="搜索名称、负责人、分类"
              value={query}
            />
          </label>
          <div className="relative block">
            <Filter className="pointer-events-none absolute left-3 top-1/2 size-4 -translate-y-1/2 text-muted-foreground" />
            <Select
              aria-label="按状态筛选"
              className="w-full pl-9"
              onValueChange={updateStatus}
              options={statusOptions.map((option) => ({ value: option, label: option }))}
              value={status}
            />
          </div>
        </div>
      </div>

      <div className="overflow-x-auto">
        <Table className="w-full min-w-[860px] text-sm">
          <Table.Header className="bg-secondary text-left text-xs text-muted-foreground">
            <Table.Row>
              <Table.Head className="px-4 py-3 font-medium">记录</Table.Head>
              <Table.Head className="px-4 py-3 font-medium">分类</Table.Head>
              <Table.Head className="px-4 py-3 font-medium">负责人</Table.Head>
              <Table.Head className="px-4 py-3 font-medium">状态</Table.Head>
              <Table.Head className="px-4 py-3 font-medium">标记</Table.Head>
              <Table.Head className="px-4 py-3 text-right font-medium">操作</Table.Head>
            </Table.Row>
          </Table.Header>
          <Table.Body className="divide-y bg-card">
            {visibleRecords.map((record) => (
              <Table.Row key={record.id}>
                <Table.Cell className="px-4 py-3">
                  <p className="font-medium">{record.title}</p>
                  <p className="mt-1 max-w-md truncate text-xs text-muted-foreground">{record.summary}</p>
                </Table.Cell>
                <Table.Cell className="px-4 py-3 text-muted-foreground">{record.category}</Table.Cell>
                <Table.Cell className="px-4 py-3">{record.owner}</Table.Cell>
                <Table.Cell className="px-4 py-3">
                  <Badge variant={record.statusTone}>{record.status}</Badge>
                </Table.Cell>
                <Table.Cell className="px-4 py-3">
                  <Badge variant={record.priority === "高" ? "danger" : record.priority === "中" ? "warning" : "secondary"}>
                    {record.priority}优先级
                  </Badge>
                </Table.Cell>
                <Table.Cell className="px-4 py-3">
                  <div className="flex justify-end">
                    <Button onClick={() => setSelectedRecord(record)} size="sm" type="button" variant="outline">
                      <Eye className="size-4" aria-hidden="true" />
                      详情
                    </Button>
                  </div>
                </Table.Cell>
              </Table.Row>
            ))}
            {visibleRecords.length === 0 ? (
              <Table.Row>
                <Table.Cell className="px-4 py-8 text-center text-muted-foreground" colSpan={6}>
                  暂无匹配记录
                </Table.Cell>
              </Table.Row>
            ) : null}
          </Table.Body>
        </Table>
      </div>

      <div className="flex flex-col gap-3 border-t p-4 sm:flex-row sm:items-center sm:justify-between">
        <p className="text-sm text-muted-foreground">
          第 {safePage} / {pageCount} 页
        </p>
        <div className="flex gap-2">
          <Button
            disabled={safePage === 1}
            onClick={() => setPage((current) => Math.max(1, current - 1))}
            size="sm"
            type="button"
            variant="outline"
          >
            上一页
          </Button>
          <Button
            disabled={safePage === pageCount}
            onClick={() => setPage((current) => Math.min(pageCount, current + 1))}
            size="sm"
            type="button"
            variant="outline"
          >
            下一页
          </Button>
        </div>
      </div>

      <Dialog
        description={selectedRecord?.summary}
        onClose={() => setSelectedRecord(null)}
        open={selectedRecord !== null}
        title={selectedRecord?.title ?? "记录详情"}
      >
        {selectedRecord ? (
          <dl className="grid gap-3 text-sm sm:grid-cols-2">
            <div className="rounded-md border p-3">
              <dt className="text-muted-foreground">分类</dt>
              <dd className="mt-1 font-medium">{selectedRecord.category}</dd>
            </div>
            <div className="rounded-md border p-3">
              <dt className="text-muted-foreground">负责人</dt>
              <dd className="mt-1 font-medium">{selectedRecord.owner}</dd>
            </div>
            <div className="rounded-md border p-3">
              <dt className="text-muted-foreground">状态</dt>
              <dd className="mt-1">
                <Badge variant={selectedRecord.statusTone}>{selectedRecord.status}</Badge>
              </dd>
            </div>
            <div className="rounded-md border p-3">
              <dt className="text-muted-foreground">最近更新</dt>
              <dd className="mt-1 font-medium">{selectedRecord.updatedAt}</dd>
            </div>
            <div className="rounded-md border p-3 sm:col-span-2">
              <dt className="text-muted-foreground">数据标记</dt>
              <dd className="mt-2">
                <Badge
                  variant={
                    selectedRecord.priority === "高"
                      ? "danger"
                      : selectedRecord.priority === "中"
                        ? "warning"
                        : "secondary"
                  }
                >
                  {selectedRecord.priority}优先级
                </Badge>
              </dd>
            </div>
          </dl>
        ) : null}
      </Dialog>
    </section>
  );
}
