import express from 'express'
import path from 'node:path'
import { fileURLToPath } from 'node:url'
import { checkBackendHealth, fetchStoredAppState, persistAppState } from './appwriteBackend.mjs'

const app = express()
const __filename = fileURLToPath(import.meta.url)
const __dirname = path.dirname(__filename)
const distDir = path.resolve(__dirname, '../dist')
const port = Number(process.env.BUILDPULSE_PORT || process.env.BUILDPULSE_API_PORT || 3034)
const host = process.env.BUILDPULSE_HOST || '127.0.0.1'

app.use(express.json({ limit: '2mb' }))

app.get('/api/health', async (_req, res) => {
  try {
    const health = await checkBackendHealth()
    res.json(health)
  } catch (error) {
    res.status(500).json({ ok: false, backend: 'appwrite', error: error?.message || 'Unknown backend error' })
  }
})

app.get('/api/state', async (_req, res) => {
  try {
    const state = await fetchStoredAppState()
    res.json({ ok: true, backend: 'appwrite', state })
  } catch (error) {
    res.status(500).json({ ok: false, backend: 'appwrite', error: error?.message || 'Failed to fetch state' })
  }
})

app.put('/api/state', async (req, res) => {
  const state = req.body?.state
  if (!state || typeof state !== 'object') {
    res.status(400).json({ ok: false, error: 'Request body must include a state object.' })
    return
  }

  try {
    await persistAppState(state)
    res.json({ ok: true, backend: 'appwrite' })
  } catch (error) {
    res.status(500).json({ ok: false, backend: 'appwrite', error: error?.message || 'Failed to persist state' })
  }
})

app.use(express.static(distDir))

app.get('/{*path}', (_req, res) => {
  res.sendFile(path.join(distDir, 'index.html'))
})

app.listen(port, host, () => {
  console.log(`BuildPulse listening on http://${host}:${port}`)
})