server.js

import express from 'express'
import compression from 'compression'
import path from 'path'
import { fileURLToPath } from 'url'
import admin from 'firebase-admin'
import { findComplementaryFoods } from './proteinScoring.js'

const __filename = fileURLToPath(import.meta.url)
const __dirname = path.dirname(__filename)

const app = express()
const PORT = process.env.PORT || 8080

// Initialize Firebase Admin SDK
// Check if we're in development (emulator) or production
const isDevelopment = process.env.NODE_ENV !== 'production'

if (isDevelopment) {
  // Use emulator in development
  process.env.FIRESTORE_EMULATOR_HOST = '127.0.0.1:8086'
  console.log('🔧 Using Firestore Emulator (127.0.0.1:8086)')
}

admin.initializeApp({
  projectId: 'prfctprotein-com',
})

const db = admin.firestore()

// Enable gzip compression
app.use(compression())

// Parse JSON bodies
app.use(express.json())

// API Routes
// Get all foods (names only for dropdown)
app.get('/api/foods', async (req, res) => {
  try {
    const snapshot = await db.collection('foods').orderBy('name').get()

    const foods = snapshot.docs.map((doc) => ({
      id: doc.id,
      name: doc.data().name,
    }))

    res.json(foods)
  } catch (error) {
    console.error('Error fetching foods:', error)
    res.status(500).json({ error: 'Failed to fetch foods' })
  }
})

// Get a specific food by ID (with complementary food suggestions)
app.get('/api/foods/:id', async (req, res) => {
  try {
    const { id } = req.params
    const doc = await db.collection('foods').doc(id).get()

    if (!doc.exists) {
      return res.status(404).json({ error: 'Food not found' })
    }

    const data = doc.data()

    // Get all foods for complementary calculations
    const allFoodsSnapshot = await db.collection('foods').get()
    const allFoods = allFoodsSnapshot.docs.map((doc) => doc.data())

    // Calculate complementary foods (top 50)
    const complementaryFoods = findComplementaryFoods(data, allFoods, 50)

    // Return food data with complementary suggestions
    const response = {
      name: data.name,
      scientificName: data.scientificName || null,
      sourceUrl: data.sourceUrl,
      aminoAcids: data.aminoAcids,
      nutritionalData: data.nutritionalData || null,
      complementaryFoods,
    }

    res.json(response)
  } catch (error) {
    console.error('Error fetching food:', error)
    res.status(500).json({ error: 'Failed to fetch food' })
  }
})

// Serve static files from the dist directory
app.use(express.static(path.join(__dirname, 'dist')))

// Handle SPA routing - send all requests to index.html
app.use((req, res) => {
  res.sendFile(path.join(__dirname, 'dist', 'index.html'))
})

app.listen(PORT, () => {
  console.log(`Server is running on port ${PORT}`)
})