import { useState, useEffect } from "react";
import { useSelector } from "react-redux";
import { useNavigate } from "react-router-dom";
import { Spin, Empty } from "@arco-design/web-react";
// import { mapJobList, mapInterviewList } from "@/utils/dataMapper"; // 不再需要映射器，mock数据已经是前端格式
import InfiniteScroll from "@/components/InfiniteScroll";
import toast from "@/components/Toast";
import JobList from "./components/JobList";
import {
  getCompanyJobsPageData,
  getJobsList,
  getInterviewsList,
} from "@/services";

import "./index.css";
const PAGE_SIZE = 10;

const CompanyJobsPage = () => {
  const studentInfo = useSelector((state) => state.student.studentInfo);
  const [jobs, setJobs] = useState([]);
  const [jobsListPage, setJobsListPage] = useState(1);
  const [jobsListHasMore, setJobsListHasMore] = useState(true);
  const [interviews, setInterviews] = useState([]);
  const [interviewsPage, setInterviewsPage] = useState(1);
  const [interviewsHasMore, setInterviewsHasMore] = useState(true);
  const [initialDataLoaded, setInitialDataLoaded] = useState(false);
  const [loading, setLoading] = useState(true);
  const navigate = useNavigate();

  // 初始化页面数据 - 使用聚合接口
  useEffect(() => {
    const fetchInitialData = async () => {
      try {
        setLoading(true);
        const res = await getCompanyJobsPageData({
          studentId: studentInfo?.id,
        });

        if (res?.success) {
          // 设置岗位数据
          if (res.data?.jobs) {
            // Mock数据已经是前端格式，直接使用不需要映射
            const jobs = res.data.jobs.list || [];
            setJobs(jobs);
            setJobsListHasMore(res.data.jobs.hasMore);
            if (jobs.length > 0) {
              setJobsListPage(2); // 下次从第2页开始
            }
          }

          // 设置面试数据
          if (res.data?.interviews) {
            // Mock数据已经是前端格式，直接使用不需要映射
            const interviews = res.data.interviews.list || [];
            setInterviews(interviews);
            setInterviewsHasMore(res.data.interviews.hasMore);
            if (interviews.length > 0) {
              setInterviewsPage(2); // 下次从第2页开始
            }
          }

          setInitialDataLoaded(true);
        }
      } catch (error) {
        console.error("Failed to fetch initial page data:", error);
        // 如果聚合接口失败，回退到原来的方式
        setInitialDataLoaded(true);
        // 显示错误信息给用户
        if (toast && toast.error) {
          toast.error("加载数据失败，请刷新重试");
        }
      } finally {
        setLoading(false);
      }
    };

    fetchInitialData();
  }, [studentInfo?.id]);

  // 获取面试信息 - 用于分页加载更多
  const fetchInterviewsData = async () => {
    // 如果初始数据还没加载完成，或者是第一页且已有初始数据，则跳过
    if (!initialDataLoaded || (interviewsPage === 1 && interviews.length > 0)) {
      return;
    }

    if (studentInfo?.id) {
      const res = await getInterviewsList({
        page: interviewsPage,
        pageSize: PAGE_SIZE,
        studentId: studentInfo?.id,
        status: "SCHEDULED",
      });
      if (res.success) {
        // Mock数据已经是前端格式，直接使用
        const interviews = res.data || [];
        setInterviews((prevList) => {
          // 去重处理：过滤掉已存在的数据
          const existingIds = new Set(
            prevList.map((interview) => interview.id)
          );
          const newInterviews = interviews.filter(
            (interview) => !existingIds.has(interview.id)
          );

          const newList = [...prevList, ...newInterviews];
          if (res.total <= newList?.length) {
            setInterviewsHasMore(false);
          } else {
            setInterviewsPage((prevPage) => prevPage + 1);
          }
          return newList;
        });
      } else {
        if (interviewsPage === 1) {
          setInterviews([]);
        }
        toast.error(res.message);
      }
    }
  };

  // 获取企业内推岗位 - 用于分页加载更多
  const fetchJobsList = async () => {
    // 如果初始数据还没加载完成，或者是第一页且已有初始数据，则跳过
    if (!initialDataLoaded || (jobsListPage === 1 && jobs.length > 0)) {
      return;
    }

    // 防止重复请求
    if (jobsListPage === 1 && jobs.length === 0) {
      return; // 初始数据应该通过聚合接口加载
    }

    try {
      const res = await getJobsList({
        page: jobsListPage,
        pageSize: PAGE_SIZE,
        isActive: true,
      });

      if (res?.success) {
        // Mock数据已经是前端格式，直接使用
        const jobs = res.data;
        setJobs((prevList) => {
          // 去重处理：过滤掉已存在的数据
          const existingIds = new Set(prevList.map((job) => job.id));
          const newJobs = jobs.filter((job) => !existingIds.has(job.id));

          const newList = [...prevList, ...newJobs];
          if (res.total <= newList?.length) {
            setJobsListHasMore(false);
          } else {
            setJobsListPage((prevPage) => prevPage + 1);
          }
          return newList;
        });
      }
    } catch (error) {
      console.error("Failed to fetch data:", error);
      if (jobsListPage === 1) {
        setJobs([]);
      }
    }
  };

  const handleJobWrapperClick = () => {
    navigate("/company-jobs-list");
  };

  return (
    <div className="company-jobs-page-wrapper">
      <div className="company-jobs-page">
        {loading ? (
          <Spin size={80} className="company-jobs-page-spin" />
        ) : (
          <>
            <div
              className="company-jobs-page-left"
            >
              <div className="company-jobs-page-header">
                <p className="company-jobs-page-title">
                  <img 
                    src="https://ddcz-1315997005.cos.ap-nanjing.myqcloud.com/static/img/teach_sys_icon/recuUY5w4Kcw4H.png" 
                    alt="icon" 
                    style={{
                      width: '24px',
                      height: '24px',
                      marginRight: '8px',
                      verticalAlign: 'middle'
                    }}
                  />
                  企业内推岗位库
                </p>
                <button 
                  className="view-all-jobs-btn"
                  onClick={handleJobWrapperClick}
                >
                  查看全部岗位
                </button>
              </div>
              <InfiniteScroll
                loadMore={fetchJobsList}
                hasMore={jobsListHasMore}
                className="company-jobs-page-left-list-wrapper"
              >
                <JobList data={jobs} />
              </InfiniteScroll>
            </div>
            <div className="company-jobs-page-interview-wrapper">
              <div
                className="company-jobs-page-interview"
              >
                <p className="company-jobs-page-title">
                  <img 
                    src="https://ddcz-1315997005.cos.ap-nanjing.myqcloud.com/static/img/teach_sys_icon/recuUY5wqNngw9.png" 
                    alt="icon" 
                    style={{
                      width: '24px',
                      height: '24px',
                      marginRight: '8px',
                      verticalAlign: 'middle'
                    }}
                  />
                  岗位面试状态
                </p>
                <InfiniteScroll
                  loadMore={fetchInterviewsData}
                  hasMore={interviewsHasMore}
                  empty={interviews.length === 0}
                  className="company-jobs-page-interview-list"
                >
                  {interviews.map((item) => (
                    <li
                      className="company-jobs-page-interview-item"
                      key={item.id}
                    >
                      <div className="company-jobs-page-interview-item-info">
                        <p className="company-jobs-page-interview-item-info-position">
                          {item.position}
                        </p>
                        {item.job?.tags?.length > 0 ? (
                          <ul className="company-jobs-page-interview-item-info-tags">
                            {item.job.tags.map((tag) => (
                              <li
                                className="company-jobs-page-interview-item-info-tag"
                                key={tag}
                              >
                                {tag}
                              </li>
                            ))}
                          </ul>
                        ) : null}
                        <span className="company-jobs-page-interview-item-info-salary">
                          {item.job?.salary || "面议"}
                        </span>
                      </div>
                      <div className="company-jobs-page-interview-item-btn-wrapper">
                        <span>{item.interviewTime}</span>
                        <div
                          className={`company-jobs-page-interview-item-btn ${
                            item.status !== "COMPLETED" &&
                            "company-jobs-page-interview-item-btn-active"
                          }`}
                        >
                          {item.statusText}
                        </div>
                      </div>
                    </li>
                  ))}
                </InfiniteScroll>
              </div>
            </div>
          </>
        )}
      </div>
    </div>
  );
};

export default CompanyJobsPage;