import React, { useEffect, useState, useCallback } from 'react';
import { Tag, Typography, Button } from 'antd';
import { BellOutlined, ThunderboltOutlined, GiftOutlined, StarOutlined, CloseOutlined } from '@ant-design/icons';
import { getNotifications, markNotificationRead } from '../api';
import { useAuthStore } from '../store/useAuthStore';

interface Notification {
  id: string;
  title: string;
  content: string;
  type: string;
  isRead: boolean;
  createdAt: string;
}

const typeConfig: Record<string, { gradient: string; icon: React.ReactNode; label: string }> = {
  system: { gradient: 'linear-gradient(135deg, #6366f1, #818cf8)', icon: <ThunderboltOutlined />, label: '系统通知' },
  credit: { gradient: 'linear-gradient(135deg, #f59e0b, #fbbf24)', icon: <StarOutlined />, label: '积分通知' },
  promo: { gradient: 'linear-gradient(135deg, #8b5cf6, #a78bfa)', icon: <GiftOutlined />, label: '活动通知' },
};

const NotificationPopup: React.FC = () => {
  const [visible, setVisible] = useState(false);
  const [notifications, setNotifications] = useState<Notification[]>([]);
  const [currentIndex, setCurrentIndex] = useState(0);
  const refreshUser = useAuthStore((state) => state.refreshUser);
  const setUserCredits = useAuthStore((state) => state.setUserCredits);

  const fetchNotifications = useCallback(async () => {
    try {
      const result = await getNotifications(1, 20, false);
      // 接口返回结构：{ credits: { balance: 4317.23 }, items: [...], total: N }
      const data = result.items || [];

      // 同步积分：result.credits.balance 与当前 user.credits 不一致时，直接替换
      const newBalance = result?.credits?.balance;
      if (typeof newBalance === 'number') {
        const currentUser = useAuthStore.getState().user;
        if (currentUser && currentUser.credits !== newBalance) {
          setUserCredits(newBalance);
        }
      }

      setNotifications(data);
      if (data.length > 0 && !visible) {
        setVisible(true);
        setCurrentIndex(0);
      }
    } catch { /* ignore */ }
  }, [visible, setUserCredits]);

  useEffect(() => {
    fetchNotifications();
    const timer = setInterval(fetchNotifications, 30000);
    return () => clearInterval(timer);
  }, []);

  const handleAcknowledge = async () => {
    const current = notifications[currentIndex];
    if (current) {
      try { await markNotificationRead(current.id); } catch { /* ignore */ }
    }
    if (currentIndex < notifications.length - 1) {
      setCurrentIndex(currentIndex + 1);
    } else {
      setVisible(false);
      setNotifications([]);
      setCurrentIndex(0);
      // 刷新用户信息（包括积分）
      try { await refreshUser(); } catch { /* ignore */ }
    }
  };

  const handleClose = async () => {
    const current = notifications[currentIndex];
    if (current) {
      try { await markNotificationRead(current.id); } catch { /* ignore */ }
    }
    setVisible(false);
    setNotifications([]);
    setCurrentIndex(0);
  };

  if (!visible || notifications.length === 0) return null;

  const current = notifications[currentIndex];
  const tc = typeConfig[current.type] || typeConfig.system;

  return (
    <div style={{
      position: 'fixed', top: 0, left: 0, right: 0, bottom: 0,
      zIndex: 9999, display: 'flex', alignItems: 'center', justifyContent: 'center',
      background: 'rgba(15,15,35,0.6)', backdropFilter: 'blur(8px)',
    }} onClick={handleClose}>
      <div onClick={e => e.stopPropagation()} style={{
        width: 420, borderRadius: 20, overflow: 'hidden',
        boxShadow: '0 32px 80px rgba(0,0,0,0.35)',
        animation: 'slideUp 0.35s cubic-bezier(0.16,1,0.3,1)',
      }}>
        {/* Header */}
        <div style={{
          background: tc.gradient,
          padding: '28px 28px 24px',
          position: 'relative', overflow: 'hidden',
        }}>
          <div style={{ position: 'absolute', right: -20, top: -20, width: 120, height: 120, borderRadius: '50%', background: 'rgba(255,255,255,0.1)' }} />
          <div style={{ position: 'absolute', right: 50, bottom: -30, width: 80, height: 80, borderRadius: '50%', background: 'rgba(255,255,255,0.06)' }} />
          <div style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'flex-start', position: 'relative' }}>
            <div style={{ display: 'flex', alignItems: 'center', gap: 14 }}>
              <div style={{
                width: 48, height: 48, borderRadius: 14,
                background: 'rgba(255,255,255,0.2)',
                display: 'flex', alignItems: 'center', justifyContent: 'center',
                backdropFilter: 'blur(4px)', fontSize: 22, color: '#fff',
              }}>{tc.icon}</div>
              <div>
                <div style={{ color: 'rgba(255,255,255,0.7)', fontSize: 12, marginBottom: 2 }}>新消息通知</div>
                <div style={{ color: '#fff', fontSize: 17, fontWeight: 700 }}>{current.title}</div>
              </div>
            </div>
            <div onClick={handleClose} style={{
              width: 28, height: 28, borderRadius: 8,
              background: 'rgba(255,255,255,0.15)', cursor: 'pointer',
              display: 'flex', alignItems: 'center', justifyContent: 'center',
              transition: 'background 0.2s',
            }}
              onMouseEnter={e => { e.currentTarget.style.background = 'rgba(255,255,255,0.25)'; }}
              onMouseLeave={e => { e.currentTarget.style.background = 'rgba(255,255,255,0.15)'; }}
            >
              <CloseOutlined style={{ color: '#fff', fontSize: 12 }} />
            </div>
          </div>
        </div>

        {/* Body */}
        <div style={{ background: '#fff', padding: '24px 28px 28px' }}>
          <div style={{
            padding: '18px 20px', background: '#f8fafc', borderRadius: 14,
            marginBottom: 20, border: '1px solid #f0f0f5',
          }}>
            <div style={{ fontSize: 14, color: '#334155', lineHeight: 1.8 }}>
              {current.content}
            </div>
          </div>

          <div style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center' }}>
            <div style={{ display: 'flex', alignItems: 'center', gap: 8 }}>
              <Tag color={tc.gradient.includes('#6366f1') ? '#6366f1' : tc.gradient.includes('#f59e0b') ? '#f59e0b' : '#8b5cf6'}
                style={{ borderRadius: 6, border: 'none', padding: '2px 10px', fontSize: 12 }}>
                {tc.label}
              </Tag>
              {notifications.length > 1 && (
                <span style={{ fontSize: 12, color: '#94a3b8' }}>{currentIndex + 1} / {notifications.length}</span>
              )}
            </div>
            <Button type="primary" onClick={handleAcknowledge} style={{
              borderRadius: 10, fontWeight: 600, height: 38,
              background: tc.gradient, border: 'none',
              paddingLeft: 28, paddingRight: 28,
              boxShadow: `0 6px 16px ${tc.gradient.includes('#6366f1') ? 'rgba(99,102,241,0.3)' : tc.gradient.includes('#f59e0b') ? 'rgba(245,158,11,0.3)' : 'rgba(139,92,246,0.3)'}`,
            }}>
              我已知晓
            </Button>
          </div>

          {/* Dots */}
          {notifications.length > 1 && (
            <div style={{ display: 'flex', justifyContent: 'center', gap: 6, marginTop: 18 }}>
              {notifications.map((_, i) => (
                <div key={i} style={{
                  width: i === currentIndex ? 22 : 6, height: 6, borderRadius: 3,
                  background: i === currentIndex ? (tc.gradient.includes('#6366f1') ? '#6366f1' : tc.gradient.includes('#f59e0b') ? '#f59e0b' : '#8b5cf6') : '#e2e8f0',
                  transition: 'all 0.3s ease',
                }} />
              ))}
            </div>
          )}
        </div>
      </div>
      <style>{`
        @keyframes slideUp {
          from { opacity: 0; transform: translateY(24px) scale(0.97); }
          to { opacity: 1; transform: translateY(0) scale(1); }
        }
      `}</style>
    </div>
  );
};

export default NotificationPopup;
