import { type MetaFunction, type LoaderFunctionArgs } from "@remix-run/node";
import { useLoaderData, useSearchParams } from "@remix-run/react";
import { Button } from "~/components/ui/Button";
import { Card } from "~/components/ui/Card";
import { FileIcon } from "~/components/ui/FileIcon";
import { FilterPanel, FilterSelect, SearchFilter } from "~/components/ui/FilterPanel";
import { Pagination } from "~/components/ui/Pagination";
import { Table } from "~/components/ui/Table";
import { Tag } from "~/components/ui/Tag";
import { StatusBadge } from "~/components/ui/StatusBadge";
import rulesFilesStyles from "~/styles/pages/rules-files.css?url";
import { 
  getReviewFiles, 
  updateReviewStatus, 
  type ReviewFileUI
} from "~/api/evaluation_points/rules-files";
import { getDocumentTypes } from "~/api/document-types/document-types";

export const links = () => [
  { rel: "stylesheet", href: rulesFilesStyles }
];

export const handle = {
  breadcrumb: "评查文件列表"
};

export const meta: MetaFunction = () => {
  return [
    { title: "评查文件列表 - 中国烟草AI合同及卷宗审核系统" },
    { name: "description", content: "管理系统中所有上传的评查文件，支持按文件类型、评查状态进行筛选" },
    { name: "keywords", content: "评查文件,合同审核,中国烟草,文件管理" }
  ];
};

// 日期范围枚举
export enum DateRange {
  ALL = 'all',
  TODAY = 'today',
  WEEK = 'week',
  MONTH = 'month',
  CUSTOM = 'custom'
}

// 评查状态标签映射
export const REVIEW_STATUS_LABELS: Record<string, string> = {
  'pass': '通过',
  'warning': '警告',
  'fail': '不通过',
  'pending': '待人工确认'
};


export async function loader({ request }: LoaderFunctionArgs) {
  const url = new URL(request.url);
  const fileType = url.searchParams.get("fileType") || "";
  const reviewStatus = url.searchParams.get("reviewStatus") || "";
  const dateRange = url.searchParams.get("dateRange") || "";
  const keyword = url.searchParams.get("keyword") || "";
  const sortOrder = url.searchParams.get("sortOrder") || "upload_time_desc";
  const currentPage = parseInt(url.searchParams.get("page") || "1", 10);
  const pageSize = parseInt(url.searchParams.get("pageSize") || "10", 10);
  
  try {
    // 获取文档类型列表
    const typesResponse = await getDocumentTypes({pageSize:500});
    const documentTypes = typesResponse.data?.types || [];
    
    // 获取文件列表
    const searchParams = {
      fileType,
      reviewStatus,
      dateRange,
      keyword,
      sortOrder,
      page: currentPage,
      pageSize,
    };
    
    console.log('rules-filessearchParams-----',searchParams);

    const filesResponse = await getReviewFiles(searchParams);
    if (filesResponse.error) {
      console.error('获取评查文件列表失败:', filesResponse.error);
      throw new Response('获取评查文件列表失败', { status: filesResponse.status || 500 });
    }
    
    const files = filesResponse.data?.files || [];
    const totalCount = filesResponse.data?.total || 0;
    
    return Response.json({
      files,
      documentTypes,
      totalCount,
      currentPage,
      pageSize,
    });
  } catch (error) {
    console.error('加载评查文件列表失败:', error);
    throw new Response('加载评查文件列表失败', { status: 500 });
  }
}

// 提取renderErrorBoundary函数作为命名导出
export function ErrorBoundary() {
  return (
    <div className="error-container p-6">
      <h1 className="text-xl font-normal text-red-500 mb-4">出错了</h1>
      <p className="mb-4">加载评查文件列表时发生错误。请稍后再试，或联系管理员。</p>
      <Button type="primary" to="/">返回首页</Button>
    </div>
  );
}

// 在文件中定义一个与路由文件名匹配的命名函数组件
export default function RulesFiles() {
  const { files, documentTypes, totalCount, currentPage, pageSize } = useLoaderData<typeof loader>();
  const [searchParams, setSearchParams] = useSearchParams();
  
  // 处理筛选条件变更
  const handleFilterChange = (e: React.ChangeEvent<HTMLSelectElement | HTMLInputElement>) => {
    const { name, value } = e.target;
    const newParams = new URLSearchParams(searchParams);
    
    if (value) {
      newParams.set(name, value);
    } else {
      newParams.delete(name);
    }
    
    // 切换筛选条件时，重置到第一页
    newParams.set('page', '1');
    
    setSearchParams(newParams);
  };
  
  // 处理搜索操作
  const handleSearch = (keyword: string) => {
    const newParams = new URLSearchParams(searchParams);
    if (keyword) {
      newParams.set('keyword', keyword);
    } else {
      newParams.delete('keyword');
    }
    
    // 搜索时，重置到第一页
    newParams.set('page', '1');
    
    setSearchParams(newParams);
  };

  // 处理页码变更
  const handlePageChange = (page: number) => {
    const newParams = new URLSearchParams(searchParams);
    newParams.set('page', page.toString());
    setSearchParams(newParams);
  };
  
  // 处理每页条数变更
  const handlePageSizeChange = (size: number) => {
    const newParams = new URLSearchParams(searchParams);
    newParams.set('pageSize', size.toString());
    newParams.set('page', '1'); // 改变每页条数时重置为第一页
    setSearchParams(newParams);
  };
  
  // 处理确认评查状态
  const handleConfirmStatus = async (id: string, status: string) => {
    try {
      await updateReviewStatus(id, status);
      // 刷新页面获取最新数据
      const newParams = new URLSearchParams(searchParams);
      setSearchParams(newParams);
    } catch (error) {
      console.error('更新评查状态失败:', error);
      // 可以在这里添加错误提示
    }
  };
  
  // 渲染问题摘要
  const renderIssues = (file: ReviewFileUI) => {
    // 如果评查状态为通过，显示"所有评查点均通过"
    if (file.reviewStatus === 'pass') {
      return (
        <div className="text-sm text-success">
          <i className="ri-check-double-line mr-1"></i>所有评查点均通过
        </div>
      );
    }
    
    // 其他状态显示占位符
    return <div className="text-sm text-secondary">-</div>;
  };
  
  // 文件类型选项
  const fileTypeOptions = documentTypes.map((type: {id: number, name: string}) => ({
    value: type.id.toString(),
    label: type.name
  }));
  
  // 评查状态选项
  const reviewStatusOptions = [
    { value: 'pass', label: '通过' },
    { value: 'warning', label: '警告' },
    { value: 'fail', label: '不通过' },
    { value: 'pending', label: '待人工确认' }
  ];
  
  // 时间范围选项
  const dateRangeOptions = [
    { value: DateRange.TODAY, label: '今天' },
    { value: DateRange.WEEK, label: '本周' },
    { value: DateRange.MONTH, label: '本月' },
    { value: DateRange.CUSTOM, label: '自定义时间段' }
  ];
  
  // 定义表格列配置
  const columns = [
    {
      title: "文件名称",
      key: "fileName",
      width: "30%",
      render: (_: unknown, file: ReviewFileUI) => (
        <div className="flex items-center">
          <FileIcon fileName={file.fileName} className="mr-2 text-lg flex-shrink-0 w-10 h-10" />
          <div>
            <div className="font-normal text-base break-words" title={file.fileName}>{file.fileName}</div>
            <div className="text-xs text-secondary mt-1">
              文件编号：{file.fileCode}
            </div>
          </div>
        </div>
      )
    },
    {
      title: "文件类型",
      key: "fileType",
      width: "12%",
      render: (_: unknown, file: ReviewFileUI) => (
        <Tag 
          color="blue"
          size="sm"
        >
          {file.fileType}
        </Tag>
      )
    },
    {
      title: "上传时间",
      key: "uploadTime",
      width: "12%",
      render: (_: unknown, file: ReviewFileUI) => {
        const [date, time] = file.uploadTime.split(' ');
        return (
          <div>
            <span className="text-base">{date}</span>
            <br />
            <span className="text-xs text-secondary">{time}</span>
          </div>
        );
      }
    },
    {
      title: "评查状态",
      key: "reviewStatus",
      width: "12%",
      render: (_: unknown, file: ReviewFileUI) => (
        <StatusBadge 
          status={file.reviewStatus} 
          text={REVIEW_STATUS_LABELS[file.reviewStatus]} 
          showIcon={true}
        />
      )
    },
    {
      title: "问题摘要",
      key: "issues",
      width: "20%",
      render: (_: unknown, file: ReviewFileUI) => renderIssues(file)
    },
    {
      title: "操作",
      key: "operation",
      width: "14%",
      render: (_: unknown, file: ReviewFileUI) => (
        <>
          {file.reviewStatus === 'pending' ? (
            <Button 
              type="primary" 
              size="small" 
              icon="ri-check-double-line" 
              className="mr-2"
              onClick={() => handleConfirmStatus(file.id, 'pass')}
            >
              确认
            </Button>
          ) : (
            <Button 
              type="default" 
              size="small" 
              icon="ri-eye-line" 
              to={`/files/${file.id}`} 
              className="mr-2"
            >
              查看
            </Button>
          )}
          <Button type="default" size="small" icon="ri-download-2-line">
            下载
          </Button>
        </>
      )
    }
  ];
  
  return (
    <div className="p-6 review-files-page">
      {/* 页面头部 */}
      <div className="flex justify-between items-center mb-4">
        <div className="flex items-center">
          <h2 className="text-xl font-normal">评查文件列表</h2>
          <div className="flex items-center ml-4 bg-white px-3 py-1 rounded-md">
            <i className="ri-file-list-3-line text-primary text-lg mr-1"></i>
            <span className="text-sm text-secondary">总文件数：</span>
            <span className="text-base font-normal text-primary ml-1">{totalCount}</span>
          </div>
        </div>
        <Button type="primary" icon="ri-file-upload-line" to="/files/upload">
          上传新文件
        </Button>
      </div>
      
      {/* 筛选区域 */}
      <FilterPanel className="px-3 py-3" noActionDivider={true}>
        <FilterSelect
          label="文件类型"
          name="fileType"
          value={searchParams.get('fileType') || ''}
          options={fileTypeOptions}
          onChange={handleFilterChange}
          className="mr-2 w-40"
        />
        
        <FilterSelect
          label="评查状态"
          name="reviewStatus"
          value={searchParams.get('reviewStatus') || ''}
          options={reviewStatusOptions}
          onChange={handleFilterChange}
          className="mr-2 w-40"
        />
        
        <FilterSelect
          label="时间范围"
          name="dateRange"
          value={searchParams.get('dateRange') || ''}
          options={dateRangeOptions}
          onChange={handleFilterChange}
          className="mr-2 w-40"
        />
        
        <SearchFilter
          label="搜索"
          placeholder="搜索文件名、合同编号或关键词"
          value={searchParams.get('keyword') || ''}
          onSearch={handleSearch}
          buttonText=""
          className="mr-2 w-64"
        />

        <FilterSelect
          label="排序方式"
          name="sortOrder"
          value={searchParams.get('sortOrder') || 'upload_time_desc'}
          onChange={handleFilterChange}
          className="w-32"
          options={[
            { value: "upload_time_desc", label: "上传时间 ↓" },
            { value: "upload_time_asc", label: "上传时间 ↑" },
            { value: "issue_count_desc", label: "问题数量 ↓" },
            { value: "issue_count_asc", label: "问题数量 ↑" }
          ]}
        />
      </FilterPanel>
      
      {/* 文件列表 */}
      <Card >
        <Table
          columns={columns}
          dataSource={files}
          rowKey="id"
          emptyText="暂无文件数据"
          className="files-table"
        />
        
        {/* 分页组件 */}
        {totalCount > 0 && (
          <Pagination
            currentPage={currentPage}
            total={totalCount}
            pageSize={pageSize}
            onChange={handlePageChange}
            onPageSizeChange={handlePageSizeChange}
            showTotal={true}
            showPageSizeChanger={true}
            pageSizeOptions={[10, 20, 30, 50]}
          />
        )}
      </Card>
    </div>
  );
}