const express = require('express');
const cors = require('cors');
const app = express();

app.use(cors());
app.use(express.json());

// 模拟照片数据
const photos = [
  {
    id: 1,
    src: '/placeholder.jpg',
    title: '城市夜景',
    description: '繁华都市中的宁静夜晚',
    category: 'city',
    tags: ['夜景', '城市', '建筑'],
    date: '2024-01-15',
    exif: {
      camera: 'Canon EOS R5',
      lens: '24-70mm f/2.8',
      settings: 'f/4, 1/60s, ISO 800',
      location: '上海外滩'
    }
  },
  {
    id: 2,
    src: '/placeholder.jpg',
    title: '自然风光',
    description: '山川河流间的诗意景色',
    category: 'nature',
    tags: ['风景', '自然', '山水'],
    date: '2024-01-10',
    exif: {
      camera: 'Sony A7R IV',
      lens: '16-35mm f/2.8',
      settings: 'f/8, 1/125s, ISO 200',
      location: '张家界'
    }
  },
  {
    id: 3,
    src: '/placeholder.jpg',
    title: '人像摄影',
    description: '捕捉真实的情感瞬间',
    category: 'portrait',
    tags: ['人像', '情感', '生活'],
    date: '2024-01-05',
    exif: {
      camera: 'Nikon D850',
      lens: '85mm f/1.4',
      settings: 'f/2.8, 1/200s, ISO 400',
      location: '工作室'
    }
  }
];

// 获取所有照片
app.get('/api/photos', (req, res) => {
  res.json(photos);
});

// 获取单张照片
app.get('/api/photos/:id', (req, res) => {
  const photo = photos.find(p => p.id === parseInt(req.params.id));
  if (photo) {
    res.json(photo);
  } else {
    res.status(404).json({ error: 'Photo not found' });
  }
});

// 获取分类
app.get('/api/categories', (req, res) => {
  const categories = [...new Set(photos.map(p => p.category))];
  res.json(categories);
});

const PORT = 3001;
app.listen(PORT, () => {
  console.log(`Mock API server running on http://localhost:${PORT}`);
});