"use client";
import { useRef, useState, useEffect } from "react";
import { useRouter } from "next/navigation";
import {
  RiSearch2Line,
  RiAddCircleFill,
  RiCalendarCloseLine,
  RiLoader2Fill,
} from "react-icons/ri";
import { useGlobalContext } from "@/providers/GlobalProvider";
import { getCategoryList, getEmployeeSearch } from "@/api/client";
import { CategoryListResult, EmployeeSearchResult } from "@/utils/clientsApis";
import { SetChatLastUsedForLocalStorage } from "@/utils/chat";

export default function Home() {
  const router = useRouter();
  const boxRef = useRef<HTMLDivElement | null>(null);
  const {
    changeMenuIndex,
    listType,
    changeListType,
    agentId,
    changeAgentId,
    conversationId,
    changeConversationId,
  } = useGlobalContext();
  const [categoryList, setCategoryList] = useState<CategoryListResult[]>([]);
  const [employeeList, setEmployeeList] = useState<EmployeeSearchResult[]>([]);
  const [categoryId, setCategoryId] = useState<number>(0);
  const [keyword, setKeyword] = useState<string>("");
  const [page, setPage] = useState<number>(1);
  const [isBottom, setIsBottom] = useState<boolean>(false);
  const page_getEmployeeSearch = () => {
    getEmployeeSearch({
      page: page,
      pageSize: 20,
      categoryId: categoryId,
      title: keyword,
    }).then((data) => {
      if (data.code === 0 && data.data.data !== null) {
        setEmployeeList((prevEmployeeList) => [
          ...prevEmployeeList,
          ...data.data.data, // Append new data to the existing list
        ]);
        if (data.data.total <= 20) {
          setIsBottom(true);
        }
      } else {
        setIsBottom(true);
      }
    });
  };
  const handleScroll = () => {
    if (
      boxRef.current &&
      boxRef.current.scrollHeight - boxRef.current.clientHeight ===
        boxRef.current.scrollTop
    ) {
      setPage((prevPage) => {
        const nextPage = prevPage + 1;
        page_getEmployeeSearch(); // Load the next page
        return nextPage;
      });
    }
  };
  const selectCategory = (id: number) => {
    if (categoryId != id) {
      setIsBottom(false);
      setCategoryId(id);
      setPage(1);
      setEmployeeList([]);
    }
  };
  const handleKeywordChange = (event: React.ChangeEvent<HTMLInputElement>) => {
    setKeyword(event.target.value);
  };
  const handleSearch = () => {
    setIsBottom(false);
    setPage(1);
    setEmployeeList([]);
  };

  const addChat = (id: number) => {
    changeListType(1);
    changeAgentId(id);
    changeConversationId("");
    SetChatLastUsedForLocalStorage({listType:1,agentId:id,conversationId:''});
    router.push("/dialogue");
  };

  const [isFocused, setIsFocused] = useState(false);
  const handleFocus = () => setIsFocused(true);
  const handleBlur = () => setIsFocused(false);

  useEffect(() => {
    changeMenuIndex(2);

    getCategoryList({ page: 1, pageSize: 20 }).then((data) => {
      if (data.code === 0) {
        setCategoryList(data.data.data);
      }
    });

    page_getEmployeeSearch();
    setPage(page + 1);
  }, [isBottom, categoryId, keyword]);

  return (
    <div
      className="absolute top-0 w-full overflow-auto scroll-smooth"
      style={{ height: "calc(100vh - 5rem)" }}
      onScroll={handleScroll}
      ref={boxRef}
    >
      <div className="sticky top-0 z-50 dark:shadow-[rgba(255,255,255,.15)] backdrop-blur dark:bg-transparent transition-all">
        <div className="flex flex-row justify-center pt-9">
          <div className="w-11/12 md:basis-1/2 2xl:basis-1/3 relative">
            <input
              className="w-full border rounded-full pl-4 pr-12 py-2 focus:border-[#0061ff] dark:focus:border-slate-700 focus:outline-none"
              type="text"
              placeholder="输入关键词查询智能体..."
              value={keyword}
              onChange={handleKeywordChange}
              onFocus={handleFocus}
              onBlur={handleBlur}
              onKeyDown={(e) => {
                if (e.key === "Enter") {
                  handleSearch();
                }
              }}
            />
            <div
              className={`absolute right-0 top-0 py-2 mr-4 cursor-pointer ${
                isFocused ? "text-[#0061ff]" : "text-gray-400"
              }`}
            >
              <RiSearch2Line size={24} />
            </div>
          </div>
        </div>
        {categoryList !== null && categoryList.length > 0 && (
          <div className="flex flex-row justify-center py-4">
            <div className="container mx-auto flex flex-wrap justify-center gap-2 text-sm">
              <button
                type="button"
                className={`px-4 py-1 border rounded-full ${
                  categoryId == 0
                    ? "bg-blue-50 dark:bg-blue-950 text-[#0061ff]"
                    : "text-gray-500 dark:text-gray-500 bg-white dark:bg-gray-800 hover:text-gray-900 dark:hover:text-white hover:bg-blue-50 dark:hover:bg-gray-800"
                }`}
                onClick={() => selectCategory(0)}
              >
                全部分类
              </button>
              {categoryList.map((item) => (
                <button
                  key={item.id}
                  type="button"
                  className={`px-4 py-1 border rounded-full ${
                    categoryId == item.id
                      ? "bg-blue-50 dark:bg-blue-950 text-[#0061ff]"
                      : "text-gray-500 dark:text-gray-500 bg-white dark:bg-gray-800 hover:text-gray-900 dark:hover:text-white hover:bg-blue-50 dark:hover:bg-gray-800"
                  }`}
                  onClick={() => selectCategory(item.id)}
                >
                  {item.name}
                </button>
              ))}
            </div>
          </div>
        )}
      </div>

      {employeeList !== null && employeeList.length > 0 && (
        <section className="text-gray-600 body-font">
          <div className="container px-5 py-20 mx-auto">
            <div className="flex flex-wrap -m-4 text-sm">
              {employeeList.map((item) => (
                <div
                  className="p-4 lg:w-1/2 xl:w-1/3 transition transform hover:-translate-y-1 motion-reduce:transition-none motion-reduce:hover:transform-none"
                  key={item.id}
                >
                  <a
                    onClick={() => addChat(item.id)}
                    className="relative block overflow-hidden rounded-lg border border-gray-100 dark:border-slate-700 p-4 sm:p-6 lg:p-8 shadow-md cursor-pointer hover:bg-blue-50 dark:hover:bg-blue-950"
                  >
                    <span className="absolute inset-x-0 bottom-0 h-2 bg-gradient-to-r from-[#0061ff] via-[#347bec] to-[#6c62fd]"></span>
                    <div className="sm:flex sm:justify-between sm:gap-4">
                      <div>
                        <h3 className="text-lg font-bold text-gray-900 dark:text-white sm:text-xl text-ellipsis line-clamp-1 h-8">
                          {item.title}
                        </h3>
                        <p className="mt-1 text-xs font-medium text-gray-600 text-ellipsis line-clamp-2  h-8">
                          {item.skill}
                        </p>
                      </div>
                      <div className="hidden sm:block sm:shrink-0">
                        <img
                          alt={item.title}
                          src={item.avatar}
                          className="size-16 object-contain"
                        />
                      </div>
                    </div>
                    <div className="mt-4">
                      <p className="text-pretty text-sm text-gray-500 text-ellipsis line-clamp-4 h-20">
                        {item.estimate}
                      </p>
                    </div>
                  </a>
                </div>
              ))}
            </div>
          </div>
          {isBottom && (
            <div className="w-full mx-auto text-center text-sm text-gray-400 dark:text-gray-600 pb-6">
              已显示全部智能体
            </div>
          )}
        </section>
      )}

      {employeeList === null ||
        (employeeList.length === 0 && (
          <div className="w-full px-5 text-gray-200 flex flex-col mt-20">
            <div className="flex justify-center">
              <RiCalendarCloseLine className="w-16 h-16 text-center" />
            </div>
            <div className="text-center mt-4">查询结果为空</div>
          </div>
        ))}
    </div>
  );
}