"use client";

import React, { useState, useEffect, useCallback } from "react";
import { useRouter } from "next/navigation";
import {
  ChevronLeft,
  MessageSquare,
  ArrowUpCircle,
  ArrowDownCircle,
  Gift,
  Users,
  Video,
  Zap,
} from "lucide-react";

import Image from "next/image";
import InfiniteScroll from "react-infinite-scroll-component";
import Link from "next/link";

const PAGE_SIZE = 10;

const PersonalCenter = () => {
  const router = useRouter();
  const [user, setUser] = useState(null);
  const [predictions, setPredictions] = useState([]);
  const [points, setPoints] = useState([]);
  const [isLoading, setIsLoading] = useState(true);
  const [predictionPage, setPredictionPage] = useState(1);
  const [pointPage, setPointPage] = useState(1);
  const [hasMorePredictions, setHasMorePredictions] = useState(true);
  const [hasMorePoints, setHasMorePoints] = useState(true);
  const [activities, setActivities] = useState([]);

  const fetchInitialData = useCallback(async () => {
    try {
      setIsLoading(true);
      const storedUser = JSON.parse(
        localStorage.getItem("currentUser") || "null"
      );
      setUser(storedUser);

      if (storedUser && storedUser.id) {
        const [
          predictionResponse,
          pointResponse,
          userResponse,
          activitiesResponse,
        ] = await Promise.all([
          fetch(
            `/api/prediction?username=${encodeURIComponent(
              storedUser.username
            )}&current=1&pageSize=${PAGE_SIZE}`
          ),
          fetch(
            `/api/point-history?userId=${encodeURIComponent(
              storedUser.id
            )}&current=1&pageSize=${PAGE_SIZE}`
          ),
          fetch(`/api/user?id=${encodeURIComponent(storedUser.id)}`),
          fetch("/api/new-activities", {
            headers: {
              "x-from-frontend": "true",
            },
          }),
        ]);

        const [predictionData, pointData, userData, activitiesData] =
          await Promise.all([
            predictionResponse.json(),
            pointResponse.json(),
            userResponse.json(),
            activitiesResponse.json(),
          ]);

        if (predictionData.success) {
          setPredictions(predictionData.data);
          setHasMorePredictions(predictionData.data.length === PAGE_SIZE);
        } else {
          console.error("Failed to fetch predictions:", predictionData.error);
        }

        if (pointData.success) {
          setPoints(pointData.data);
          setHasMorePoints(pointData.data.length === PAGE_SIZE);
        } else {
          console.error("Failed to fetch point history:", pointData.error);
        }

        if (userData.success && userData.data) {
          const updatedUser = { ...storedUser, points: userData.data.points };
          setUser(updatedUser);
          localStorage.setItem("currentUser", JSON.stringify(updatedUser));
        } else {
          console.error("Failed to fetch user data:", userData.error);
        }

        // 处理活动数据
        if (activitiesData.success) {
          setActivities(activitiesData.data);
        } else {
          console.error("Failed to fetch activities:", activitiesData.error);
        }
      } else {
        // 如果用户未登录，仍然获取活动数据
        const activitiesResponse = await activitiesPromise;
        const activitiesData = await activitiesResponse.json();
        if (activitiesData.success) {
          setActivities(activitiesData.data);
        } else {
          console.error("Failed to fetch activities:", activitiesData.error);
        }
      }
    } catch (error) {
      console.error("Error fetching data:", error);
    } finally {
      setIsLoading(false);
    }
  }, []);

  useEffect(() => {
    fetchInitialData();
  }, [fetchInitialData]);

  const loadMorePredictions = async () => {
    if (!hasMorePredictions || !user) return;
    try {
      const response = await fetch(
        `/api/prediction?username=${encodeURIComponent(
          user.username
        )}&current=${predictionPage + 1}&pageSize=${PAGE_SIZE}`
      );
      const data = await response.json();
      if (data.success) {
        setPredictions((prev) => [...prev, ...data.data]);
        setPredictionPage((prev) => prev + 1);
        setHasMorePredictions(data.data.length === PAGE_SIZE);
      } else {
        console.error("Failed to fetch more predictions:", data.error);
      }
    } catch (error) {
      console.error("Error fetching more predictions:", error);
    }
  };

  const loadMorePoints = async () => {
    if (!hasMorePoints || !user) return;
    try {
      const response = await fetch(
        `/api/point-history?userId=${encodeURIComponent(user.id)}&current=${
          pointPage + 1
        }&pageSize=${PAGE_SIZE}`
      );
      const data = await response.json();
      if (data.success) {
        setPoints((prev) => [...prev, ...data.data]);
        setPointPage((prev) => prev + 1);
        setHasMorePoints(data.data.length === PAGE_SIZE);
      } else {
        console.error("Failed to fetch more point history:", data.error);
      }
    } catch (error) {
      console.error("Error fetching more point history:", error);
    }
  };

  const handleExchangePoints = () => {
    console.log("兑换积分");
    // router.push('/exchange-points');
  };

  if (isLoading) {
    return (
      <div className="bg-blue-600 text-white min-h-screen p-4">Loading...</div>
    );
  }

  if (!user) {
    return (
      <div className="bg-blue-600 text-white min-h-screen p-4">
        User not found
      </div>
    );
  }

  return (
    <div className="bg-blue-600 text-white min-h-screen p-4">
      <div className="flex items-center mb-4">
        <ChevronLeft
          className="cursor-pointer"
          onClick={() => router.back()}
          size={32}
        />
        <h1 className="text-xl font-bold ml-4">个人中心</h1>
      </div>

      <div className="bg-white text-black rounded-lg p-4 mb-4">
        <div className="flex items-center justify-between">
          <div className="flex items-center">
            <Image
              src="/images/cluo.webp"
              alt="User Avatar"
              width={50}
              height={50}
              className="rounded-full mr-2"
            />
            <div>
              <h2 className="text-xl font-bold">{user.username}</h2>
              <p className="text-gray-600">积分: {user.points}</p>
            </div>
          </div>
          <button
            className="bg-blue-500 hover:bg-blue-600 text-white font-bold py-2 px-2 rounded transition duration-300"
            onClick={() => handleExchangePoints()}
          >
            兑换积分
          </button>
        </div>
      </div>

      {activities && activities.length > 0 && (
        <div className="bg-white text-black rounded-lg px-4 py-2 mb-4 shadow-md">
          <h3 className="text-lg font-bold mb-1 text-blue-600">最新活动</h3>
          {activities.map((activity) => (
            <Link
              key={activity._id}
              href={activity.link}
              className="flex items-center hover:bg-gray-100 p-2 rounded transition duration-300"
            >
              {activity.icon && (
                <div className="w-5 h-5 mr-2 flex-shrink-0">
                  <Image
                    src={activity.icon}
                    alt={activity.title}
                    width={20}
                    height={20}
                    className="object-contain"
                  />
                </div>
              )}
              <p>{activity.title}</p>
            </Link>
          ))}
        </div>
      )}

      <div className="bg-white text-black rounded-lg p-4 mb-4">
        <h3 className="text-lg font-bold mb-2 text-blue-600">预测记录</h3>
        <div id="predictionScroll" className="h-[300px] overflow-auto">
          <InfiniteScroll
            dataLength={predictions.length}
            next={loadMorePredictions}
            hasMore={hasMorePredictions}
            loader={<h4 className="text-center text-gray-500">加载中...</h4>}
            endMessage={
              <p className="text-center text-gray-500">没有更多记录了</p>
            }
            scrollableTarget="predictionScroll"
          >
            {predictions.map((prediction) => (
              <div
                key={prediction._id}
                className="mb-4 border-b border-gray-200 pb-4 hover:bg-gray-50 transition duration-150 ease-in-out"
              >
                <p className="font-bold text-blue-700 mb-2">
                  {prediction.matchInfo}
                </p>
                <p className="text-gray-600 mb-2">
                  比赛时间：{" "}
                  <span className="font-medium text-black">
                    {prediction.matchTime}
                  </span>
                </p>
                <div className="grid grid-cols-2 gap-2">
                  <p className="mb-1">
                    胜负预测：{" "}
                    <span
                      className={`font-medium ${
                        prediction.whoWillWin === "home"
                          ? "text-red-600"
                          : prediction.whoWillWin === "away"
                          ? "text-green-600"
                          : "text-yellow-600"
                      }`}
                    >
                      {prediction.whoWillWin === "home"
                        ? "主胜"
                        : prediction.whoWillWin === "away"
                        ? "客胜"
                        : "平局"}
                    </span>
                  </p>
                  <p className="mb-1">
                    结果：{" "}
                    <span
                      className={`font-medium ${
                        prediction.whoWillWinResult === "correct"
                          ? "text-green-600"
                          : prediction.whoWillWinResult === "incorrect"
                          ? "text-red-600"
                          : "text-gray-600"
                      }`}
                    >
                      {prediction.whoWillWinResult === "correct"
                        ? "正确"
                        : prediction.whoWillWinResult === "incorrect"
                        ? "错误"
                        : "待定"}
                    </span>
                  </p>
                  <p className="mb-1">
                    首先得分：{" "}
                    <span
                      className={`font-medium ${
                        prediction.firstTeamToScore === "home"
                          ? "text-red-600"
                          : prediction.firstTeamToScore === "away"
                          ? "text-green-600"
                          : "text-gray-600"
                      }`}
                    >
                      {prediction.firstTeamToScore === "home"
                        ? "主队"
                        : prediction.firstTeamToScore === "away"
                        ? "客队"
                        : "无进球"}
                    </span>
                  </p>
                  <p className="mb-1">
                    结果：{" "}
                    <span
                      className={`font-medium ${
                        prediction.firstTeamToScoreResult === "correct"
                          ? "text-green-600"
                          : prediction.firstTeamToScoreResult === "incorrect"
                          ? "text-red-600"
                          : "text-gray-600"
                      }`}
                    >
                      {prediction.firstTeamToScoreResult === "correct"
                        ? "正确"
                        : prediction.firstTeamToScoreResult === "incorrect"
                        ? "错误"
                        : "待定"}
                    </span>
                  </p>
                  <p className="mb-1">
                    总进球数预测：{" "}
                    <span className="font-medium text-purple-600">
                      {prediction.totalGoals}
                    </span>
                  </p>
                  <p className="mb-1">
                    结果：{" "}
                    <span
                      className={`font-medium ${
                        prediction.totalGoalsResult === "correct"
                          ? "text-green-600"
                          : prediction.totalGoalsResult === "incorrect"
                          ? "text-red-600"
                          : "text-gray-600"
                      }`}
                    >
                      {prediction.totalGoalsResult === "correct"
                        ? "正确"
                        : prediction.totalGoalsResult === "incorrect"
                        ? "错误"
                        : "待定"}
                    </span>
                  </p>
                </div>
                <p className="mt-2">
                  获得积分：{" "}
                  <span className="font-medium text-orange-600">
                    {prediction.pointsEarned !== null
                      ? prediction.pointsEarned
                      : "待定"}
                  </span>
                </p>
              </div>
            ))}
          </InfiniteScroll>
        </div>
      </div>

      <div className="bg-white text-black rounded-lg p-4 mb-4">
        <h3 className="text-lg font-bold mb-2 text-blue-700">积分记录</h3>
        <div id="pointScroll" style={{ height: "250px", overflow: "auto" }}>
          <InfiniteScroll
            dataLength={points.length}
            next={loadMorePoints}
            hasMore={hasMorePoints}
            loader={<h4>Loading...</h4>}
            endMessage={<p className="text-center">没有更多记录了</p>}
            scrollableTarget="pointScroll"
          >
            {points.map((point) => (
              <div key={point.id} className="mb-3 flex items-start">
                <div className="mr-3 mt-1 flex-shrink-0">
                  {point.points > 0 ? (
                    <ArrowUpCircle className="text-green-500 w-5 h-5" />
                  ) : (
                    <ArrowDownCircle className="text-red-500 w-5 h-5" />
                  )}
                </div>
                <div className="flex-grow mr-4">
                  <p className="text-sm text-gray-600">
                    {new Date(point.createdAt).toLocaleDateString()}
                  </p>
                  <p className="font-medium">{point.reason}</p>
                </div>
                <div
                  className={`flex-shrink-0 font-bold ${
                    point.points > 0 ? "text-green-600" : "text-red-600"
                  }`}
                >
                  {point.points > 0 ? "+" : ""}
                  {point.points}
                </div>
              </div>
            ))}
          </InfiniteScroll>
        </div>
      </div>
    </div>
  );
};

export default PersonalCenter;