"use client";

import React, { useState, useRef, useEffect, useCallback } from "react";

import { FontAwesomeIcon } from "@fortawesome/react-fontawesome";
import { faAngleLeft } from "@fortawesome/free-solid-svg-icons";
import { Input, Button, Toast, Avatar, DotLoading } from "antd-mobile";
import { useRouter } from "next/navigation";
import { get } from "@/utils/storeInfo";
import requireAPI from "@/utils/requireAPI";
import { formatDeadline } from "@/utils/tools";
/* 
params格式：
        {
          mid: item.mid,
        }
*/

export default function MessageDetail({}) {
  // const [hasMore, setHasMore] = useState(true);
  const router = useRouter();
  const [oldMessages, setOldMessages] = useState([]);
  const [messages, setMessages] = useState([]);
  const [handledmessages, setHandledmessages] = useState([]);
  const [sessionId, setSessionId] = useState();
  const [userInfo, setUserInfo] = useState(null);
  const [newMessage, setNewMessage] = useState("");
  const [loading, setLoading] = useState(false);

  const [offset, setOffset] = useState(0);
  const [more, setMore] = useState(1);
  const scrollBox = useRef();
  const toScrollBottom = useRef(0);
  useEffect(() => {
    const userData = get("account");
    setUserInfo(userData);
    getSession(userData.mid);
  }, []);
  useEffect(() => {
    const intervalId = setInterval(() => {
      // console.log("oldMessages[0]", oldMessages[0]);
      if (oldMessages[0]) {
        updateMessages(oldMessages[0]?.id, 0, oldMessages);
        // toScrollBottom.current = 1;
      }
    }, 3000); // 间隔时间为3秒

    // 在组件卸载时清除定时器
    return () => {
      clearInterval(intervalId);
    };
  }, [oldMessages]);
  useEffect(() => {
    if (toScrollBottom.current) {
      scrollBox.current?.scrollTo(0, scrollBox.current.scrollHeight + 50);
      toScrollBottom.current = 0;
    }
  }, [messages]);
  // useEffect(() => {
  //   if (offset == 12) {
  //     console.log("offset--------", offset);

  //     scrollBox.current?.scrollTo(0, scrollBox.current.scrollHeight);

  //     // console.log("scrollBox.current",scrollBox.current.scrollHeight,scrollBox.current.scrollTop)
  //   }
  // }, [offset]);
  useEffect(() => {
    if (sessionId && userInfo.mid) {
      loadEarlierHistory().then((res) => {
        setMessages((old) => {
          toScrollBottom.current = 1;
          return res;
        });
      });
    }
  }, [sessionId]);
  //查询session
  const getSession = async (mid) => {
    setLoading(true);
    try {
      const data = await requireAPI(
        "POST",
        "/api/contact_customer_service_session/list_by_mid",
        {
          body: {
            mid: Number(mid),
          },
        }
      );
      if (data.ret === -1) {
        Toast.show({
          icon: "fail",
          content: data.msg,
          position: "top",
        });
      }
      setLoading(false);
      if (data.data.session) {
        setSessionId(data.data.session.id);
      } else {
        //如果是第一次发送，需要创建session
        createSession(mid);
      }
    } catch (error) {
      console.error(error);
    }
  };
  //创建session
  const createSession = async (mid) => {
    setLoading(true);
    try {
      const data = await requireAPI(
        "POST",
        "/api/contact_customer_service_session/create",
        {
          body: {
            sub_mid: Number(mid),
            obj_mid: 0,
          },
        }
      );

      if (data.ret === -1) {
        Toast.show({
          icon: "fail",
          content: data.msg,
          position: "top",
        });
      }
      setSessionId(data.data.session_id);
      setLoading(false);
    } catch (error) {
      console.error(error);
    }
  };
  //请求历史记录
  const loadEarlierHistory = async () => {
    if (!more) return;
    try {
      setLoading(true);
      const data = await requireAPI(
        "POST",
        "/api/contact_customer_service/list_by_session_id",
        {
          body: {
            session_id: sessionId,
            offset: offset,
            limit: 12,
          },
        }
      );
      if (data.ret === -1) {
        Toast.show({
          icon: "fail",
          content: data.msg,
          position: "top",
        });
        return;
      }
      setOffset(data.data.offset);
      setMore(data.data.more);
      let mathNewMessages = handleData([...oldMessages, ...data.data.list]);
      // setMessages((prev) => [...prev, ...temMessages]);
      setLoading(false);
      return mathNewMessages;
    } catch (error) {
      console.error(error);
    }
  };
  //发送私信功能
  const onSend = useCallback(
    async (message, lastId, oldArr) => {
      if (message == "") {
        Toast.show({
          icon: "error",
          content: "不可发送空内容",
          position: "top",
        });
        return;
      }

      //查询历史记录的时候后移一位，防止记录重复
      setOffset((prev) => prev + 1);
      //请求接口发送私信
      try {
        const data = await requireAPI(
          "POST",
          "/api/contact_customer_service/create",
          {
            body: {
              session_id: sessionId,
              predicate: 0,
              message,
            },
          }
        );
        if (data.ret === -1) {
          Toast.show({
            icon: "error",
            content: data.msg,
            position: "top",
          });
          return;
        }
        // updateLatestHistory();
        // console.log("oldArr", oldArr);
        updateMessages(lastId, 0, oldArr).then((res) => {
          setNewMessage("");
          toScrollBottom.current = 1;
        });
      } catch (error) {
        console.error(error);
      }
      // //每次发送都缓存信息到本地
      // addArr(`${selfData.mid}_to_${params.mid}_messages`, messages);
    },
    [userInfo, sessionId]
  );
  // async function doRefresh() {
  //   await sleep(1000);
  //   Toast.show({
  //     icon: "fail",
  //     content: "刷新失败",
  //   });
  //   throw new Error("刷新失败");
  // }
  async function loadMore() {
    if (sessionId && userInfo.mid && offset && more) {
      const append = await loadEarlierHistory();
      if (append) {
        // setMessages((val) => [...val, ...append]);
        setMessages(append);
        // setHasMore(append.length > 0);
      }
    }
  }

  const handleData = (list) => {
    // console.log("list", list);
    const account = get("account");
    const temMessages = list.map((item) => {
      if (item.predicate === 0) {
        return {
          predicate: item.predicate,
          _id: item.id,
          // createdAt: new Date(item.ct * 1000).toISOString(),
          createdAt: item.ct,
          text: item.message,
          user: {
            _id: account?.mid,
            name: account?.name,
            avatar: account?.avatar?.images[0]?.urls[0],
          },
        };
      } else {
        return {
          predicate: item.predicate,
          _id: item.id,
          createdAt: item.ct,
          text: item.message,
          user: {
            _id: 0,
            name: "客服",
            avatar: "images/icon.png",
          },
        };
      }
    });
    // console.log("handledmessages......", handledmessages);
    // console.log("[...messages, ...temMessages]", temMessages);
    setHandledmessages(temMessages);
    setOldMessages(list);
    let newMessages = temMessages.reverse();
    let mathNewMessages = newMessages.reduce(
      (accumulator, currentValue, index, sourceArray) => {
        // console.log(
        //   accumulator.time,
        //   "----",
        //   currentValue.createdAt,
        //   "---",
        //   index
        // );
        if (accumulator.time > currentValue.createdAt) {
          let newData = {
            ...accumulator,
            time: accumulator.time,
            messages: [...accumulator.messages, currentValue],
            totalArr:
              index == sourceArray.length - 1
                ? [
                    ...accumulator.totalArr,
                    [...accumulator.messages, currentValue],
                  ]
                : [...accumulator.totalArr],
          };
          return newData;
        } else {
          let newData = {
            ...accumulator,
            time: currentValue.createdAt + 60 * 3,
            messages: [currentValue],
            totalArr:
              index == sourceArray.length - 1
                ? [
                    ...accumulator.totalArr,
                    accumulator.messages,
                    [currentValue],
                  ]
                : [...accumulator.totalArr, accumulator.messages],
          };
          return newData;
        }
      },
      { time: newMessages[0]?.createdAt + 60 * 3, messages: [], totalArr: [] }
    );
    return mathNewMessages.totalArr;
  };

  const updateMessages = async (lastId, currentOffset, oldArr) => {
    // console.log("lastId", lastId);
    try {
      const data = await requireAPI(
        "POST",
        "/api/contact_customer_service/list_by_session_id",
        {
          body: {
            session_id: sessionId,
            offset: currentOffset,
            limit: 12,
          },
        }
      );
      if (data.ret === -1) {
        Toast.show({
          icon: "fail",
          content: data.msg,
          position: "top",
        });
        return;
      }
      let newData = data.data.list.filter((element) => {
        return element.id > lastId;
      });
      // console.log("[...messages,...newData]", [...newData]);
      let mathNewMessages = handleData([...newData, ...oldArr]);
      setMessages((old) => {
        toScrollBottom.current = 1;
        return mathNewMessages;
      });
      return;
    } catch (error) {
      console.error(error);
    }
  };
  return (
    <div className="bg-[#13121F] h-screen overflow-y-auto" ref={scrollBox}>
      <div className="p-4 fixed top-0 z-10 w-full bg-black">
        <div className="flex items-center justify-center absolute">
          <FontAwesomeIcon
            icon={faAngleLeft}
            size="xl"
            onClick={() => {
              router.back();
            }}
          />
        </div>
        <p className="text-base text-center">在线客服</p>
      </div>
      <div>
        <div className="my-[57px]">
          <div className="flex justify-center py-2">
            <div className="px-3 py-2 rounded-full bg-[#FFFFFF1A]">
              {loading ? (
                <DotLoading />
              ) : more ? (
                <span onClick={loadMore}>查看更早</span>
              ) : (
                <span>无更早消息</span>
              )}
            </div>
          </div>
          <ul className="py-2">
            {messages?.map((item, index) => (
              <li key={index}>
                <p className="my-2 text-center">
                  {formatDeadline(item[0].createdAt)}
                </p>
                <ul className="px-4 overflow-y-auto scrollbarBox_hidden">
                  {item.map((it) => (
                    <li key={it?._id} className="py-3 rounded-lg ">
                      <div className="flex w-full">
                        {it?.predicate == 1 ? (
                          <div className="flex justify-start w-full items-center">
                            <Avatar
                              className="mr-2"
                              style={{ "--border-radius": "50px" }}
                              width={32}
                              height={32}
                              src={it?.user.avatar}
                            />
                            <div
                              className="block rounded-lg py-2 px-3 bg-blue-500"
                              style={{ borderTopLeftRadius: 0 }}
                            >
                              {it?.text}
                            </div>
                          </div>
                        ) : (
                          <div className="flex justify-end w-full items-center">
                            <div
                              className="block rounded-lg py-2 px-3 bg-blue-500"
                              style={{ borderTopRightRadius: 0 }}
                            >
                              {it?.text}
                            </div>
                            <Avatar
                              className="ml-2"
                              style={{ "--border-radius": "50px" }}
                              width={32}
                              height={32}
                              src={it?.user?.avatar}
                            />
                          </div>
                        )}
                      </div>
                    </li>
                  ))}
                </ul>
              </li>
            ))}
            {}
            {/* <InfiniteScroll loadMore={loadMore} hasMore={more} /> */}
          </ul>
        </div>
        <div className="w-full h-16 fixed bottom-0 grid grid-cols-[1fr_68px] bg-black items-center p-2 border-t-2 border-[#ffffff2a]">
          <div className="rounded bg-[#222036] px-4 py-2 mr-2">
            <Input
              placeholder="输入新消息"
              className=""
              value={newMessage}
              onChange={setNewMessage}
            />
          </div>
          <Button
            size="middle"
            block
            onClick={() =>
              onSend(newMessage, oldMessages[0]?.id || -1, oldMessages)
            }
            style={{ "--background-color": "#FF669E", color: "#FFFFFF" }}
          >
            发送
          </Button>
        </div>
      </div>
    </div>
  );
}