const express = require('express');
const path = require('path');
const axios = require('axios');

const app = express();
const PORT = process.env.PORT || 3000;
const API_URL = process.env.API_URL || 'http://localhost:5001';

app.use(express.json());

// Serve admin page (before static middleware)
app.get('/admin.html', (req, res) => {
  res.sendFile(path.join(__dirname, 'public', 'admin.html'));
});

app.get('/admin', (req, res) => {
  res.sendFile(path.join(__dirname, 'public', 'admin.html'));
});

// Serve preferences page
app.get('/preferences.html', (req, res) => {
  res.sendFile(path.join(__dirname, 'public', 'preferences.html'));
});

app.get('/preferences', (req, res) => {
  res.sendFile(path.join(__dirname, 'public', 'preferences.html'));
});

// Serve static files
app.use(express.static('public'));

// API proxy
app.get('/api/news', async (req, res) => {
  try {
    const response = await axios.get(`${API_URL}/api/news`);
    res.json(response.data);
  } catch (error) {
    res.status(500).json({ error: 'Failed to fetch news' });
  }
});

app.get('/api/stats', async (req, res) => {
  try {
    const response = await axios.get(`${API_URL}/api/stats`);
    res.json(response.data);
  } catch (error) {
    res.status(500).json({ error: 'Failed to fetch stats' });
  }
});

app.post('/api/subscribe', async (req, res) => {
  try {
    const response = await axios.post(`${API_URL}/api/subscribe`, req.body);
    res.json(response.data);
  } catch (error) {
    res.status(error.response?.status || 500).json(
      error.response?.data || { error: 'Failed to subscribe' }
    );
  }
});

app.post('/api/unsubscribe', async (req, res) => {
  try {
    const response = await axios.post(`${API_URL}/api/unsubscribe`, req.body);
    res.json(response.data);
  } catch (error) {
    res.status(error.response?.status || 500).json(
      error.response?.data || { error: 'Failed to unsubscribe' }
    );
  }
});

app.get('/api/subscribers', async (req, res) => {
  try {
    const response = await axios.get(`${API_URL}/api/subscribers`);
    res.json(response.data);
  } catch (error) {
    res.status(error.response?.status || 500).json(
      error.response?.data || { error: 'Failed to get subscribers' }
    );
  }
});

app.get('/api/subscribers/:email', async (req, res) => {
  try {
    const response = await axios.get(`${API_URL}/api/subscribers/${req.params.email}`);
    res.json(response.data);
  } catch (error) {
    res.status(error.response?.status || 500).json(
      error.response?.data || { error: 'Failed to get subscriber' }
    );
  }
});

app.get('/api/categories', async (req, res) => {
  try {
    const response = await axios.get(`${API_URL}/api/categories`);
    res.json(response.data);
  } catch (error) {
    res.status(error.response?.status || 500).json(
      error.response?.data || { error: 'Failed to get categories' }
    );
  }
});

app.delete('/api/admin/subscribers/delete-all', async (req, res) => {
  try {
    const response = await axios.delete(`${API_URL}/api/admin/subscribers/delete-all`);
    res.json(response.data);
  } catch (error) {
    res.status(error.response?.status || 500).json(
      error.response?.data || { error: 'Failed to delete subscribers' }
    );
  }
});

app.get('/api/rss-feeds', async (req, res) => {
  try {
    const response = await axios.get(`${API_URL}/api/rss-feeds`);
    res.json(response.data);
  } catch (error) {
    res.status(error.response?.status || 500).json(
      error.response?.data || { error: 'Failed to get RSS feeds' }
    );
  }
});

app.get('/api/rss-feeds/export', async (req, res) => {
  try {
    const response = await axios.get(`${API_URL}/api/rss-feeds/export`);
    res.json(response.data);
  } catch (error) {
    res.status(error.response?.status || 500).json(
      error.response?.data || { error: 'Failed to export RSS feeds' }
    );
  }
});

app.post('/api/rss-feeds/import', async (req, res) => {
  try {
    const response = await axios.post(`${API_URL}/api/rss-feeds/import`, req.body);
    res.json(response.data);
  } catch (error) {
    res.status(error.response?.status || 500).json(
      error.response?.data || { error: 'Failed to import RSS feeds' }
    );
  }
});

app.get('/api/admin/recent-articles', async (req, res) => {
  try {
    const response = await axios.get(`${API_URL}/api/admin/recent-articles`);
    res.json(response.data);
  } catch (error) {
    res.status(error.response?.status || 500).json(
      error.response?.data || { error: 'Failed to get recent articles' }
    );
  }
});

// Ollama API proxy endpoints for admin dashboard
app.get('/api/ollama/ping', async (req, res) => {
  try {
    const response = await axios.get(`${API_URL}/api/ollama/ping`);
    res.json(response.data);
  } catch (error) {
    res.status(500).json({ error: 'Failed to ping Ollama' });
  }
});

app.get('/api/ollama/gpu-status', async (req, res) => {
  try {
    const response = await axios.get(`${API_URL}/api/ollama/gpu-status`);
    res.json(response.data);
  } catch (error) {
    res.status(500).json({ error: 'Failed to get GPU status' });
  }
});

app.get('/api/ollama/test', async (req, res) => {
  try {
    const response = await axios.get(`${API_URL}/api/ollama/test`);
    res.json(response.data);
  } catch (error) {
    res.status(500).json({ error: 'Failed to test Ollama' });
  }
});

app.get('/api/ollama/models', async (req, res) => {
  try {
    const response = await axios.get(`${API_URL}/api/ollama/models`);
    res.json(response.data);
  } catch (error) {
    res.status(500).json({ error: 'Failed to get models' });
  }
});

app.get('/api/ollama/config', async (req, res) => {
  try {
    const response = await axios.get(`${API_URL}/api/ollama/config`);
    res.json(response.data);
  } catch (error) {
    res.status(500).json({ error: 'Failed to get config' });
  }
});

app.get('/api/search', async (req, res) => {
  try {
    const { q, limit, category } = req.query;
    const response = await axios.get(`${API_URL}/api/search`, {
      params: { q, limit, category }
    });
    res.json(response.data);
  } catch (error) {
    if (error.response) {
      // The request was made and the server responded with a status code
      // that falls out of the range of 2xx
      console.error('Search API Error:', error.response.status, error.response.data);
      res.status(error.response.status).json(error.response.data);
    } else if (error.request) {
      // The request was made but no response was received
      console.error('Search API No Response:', error.request);
      res.status(502).json({ error: 'Search service unavailable (timeout/connection)' });
    } else {
      // Something happened in setting up the request that triggered an Error
      console.error('Search API Request Error:', error.message);
      res.status(500).json({ error: 'Internal proxy error' });
    }
  }
});

app.listen(PORT, () => {
  console.log(`Frontend server running on http://localhost:${PORT}`);
  console.log(`Admin dashboard: http://localhost:${PORT}/admin.html`);
});