"use client";

import { motion } from "framer-motion";
import { useSession } from "next-auth/react";
import { useEffect, useState } from "react";

type QuotaInfo = {
  used: number;
  limit: number | null;
  remaining: number | null;
  unlimited: boolean;
  percentage: number;
};

export const Greeting = () => {
  const { data: session } = useSession();
  const [imageCount, setImageCount] = useState<number | null>(null);
  const [quota, setQuota] = useState<QuotaInfo | null>(null);
  
  // 获取用户名或邮箱前缀
  const getUserDisplayName = () => {
    if (session?.user?.name) {
      return session.user.name;
    }
    if (session?.user?.email) {
      // 如果没有名字，使用邮箱的前缀部分
      return session.user.email.split('@')[0];
    }
    return "";
  };

  const displayName = getUserDisplayName();

  // 获取用户生图统计数据和配额信息
  useEffect(() => {
    const fetchData = async () => {
      try {
        // 获取生图统计
        const statsResponse = await fetch("/api/user/image-stats");
        if (statsResponse.ok) {
          const statsData = await statsResponse.json();
          setImageCount(statsData.totalImages);
        }
        
        // 获取配额信息
        const quotaResponse = await fetch("/api/user/image-quota");
        if (quotaResponse.ok) {
          const quotaData = await quotaResponse.json();
          setQuota(quotaData);
        }
      } catch (error) {
        console.error("Failed to fetch data:", error);
      }
    };

    if (session?.user?.id) {
      fetchData();
    }
  }, [session?.user?.id]);

  // 获取进度条颜色
  const getProgressColor = (percentage: number) => {
    if (percentage >= 90) return "bg-red-500";
    if (percentage >= 70) return "bg-yellow-500";
    return "bg-green-500";
  };

  return (
    <div
      className="mx-auto mt-4 flex size-full max-w-3xl flex-col justify-center px-4 md:mt-16 md:px-8"
      key="overview"
    >
      <motion.div
        animate={{ opacity: 1, y: 0 }}
        className="font-semibold text-xl md:text-2xl"
        exit={{ opacity: 0, y: 10 }}
        initial={{ opacity: 0, y: 10 }}
        transition={{ delay: 0.5 }}
      >
        你好{displayName && `，${displayName}`}，很高兴见到你
        {imageCount !== null && imageCount > 0 && (
          <span className="ml-2 text-base font-normal text-zinc-500">
            （截止今日已为您处理 <span className="font-semibold text-green-600">{imageCount.toLocaleString()}</span> 张图）
          </span>
        )}
      </motion.div>
      <motion.div
        animate={{ opacity: 1, y: 0 }}
        className="text-xl text-zinc-500 md:text-2xl"
        exit={{ opacity: 0, y: 10 }}
        initial={{ opacity: 0, y: 10 }}
        transition={{ delay: 0.6 }}
      >
        今天我能为你做些什么？
      </motion.div>
      
      {/* 配额进度条 - 仅当有限额时显示 */}
      {quota && !quota.unlimited && quota.limit && (
        <motion.div
          animate={{ opacity: 1, y: 0 }}
          initial={{ opacity: 0, y: 10 }}
          transition={{ delay: 0.7 }}
          className="mt-4"
        >
          <div className="text-sm text-zinc-500 mb-1">
            本月出图：{quota.used}/{quota.limit} 张
            {quota.remaining !== null && quota.remaining <= 10 && quota.remaining > 0 && (
              <span className="ml-2 text-yellow-600">（剩余 {quota.remaining} 张）</span>
            )}
            {quota.remaining === 0 && (
              <span className="ml-2 text-red-600">（配额已用完）</span>
            )}
          </div>
          <div className="w-64 h-2 bg-zinc-200 dark:bg-zinc-700 rounded-full overflow-hidden">
            <div 
              className={`h-full rounded-full transition-all ${getProgressColor(quota.percentage)}`}
              style={{ width: `${Math.min(quota.percentage, 100)}%` }}
            />
          </div>
        </motion.div>
      )}
    </div>
  );
};