import path from 'node:path'
import { fileURLToPath } from 'node:url'
import { buildApp } from './app.js'
import { FileConfigStore } from './config/file-config-store.js'
import { ClientRegistry } from './clients/client-registry.js'

const root = path.resolve(path.dirname(fileURLToPath(import.meta.url)), '..')
const configPath = process.env.MULTI_SIMADMIN_CONFIG || path.join(root, 'config.json')
const examplePath = path.join(root, 'config.example.json')
const configStore = await FileConfigStore.open({ configPath, examplePath })
const clientRegistry = new ClientRegistry().reconcile(configStore.snapshot.instances)
const app = await buildApp({ configStore, clientRegistry, logger: true })

let closing = false
async function shutdown(signal) {
  if (closing) return
  closing = true
  app.log.info({ signal }, 'shutting down')
  await app.close()
}
for (const signal of ['SIGINT', 'SIGTERM']) process.once(signal, () => shutdown(signal).catch(error => { app.log.error(error); process.exitCode = 1 }))

try {
  await app.listen({ ...configStore.snapshot.server })
  app.log.info(`Loaded ${configStore.snapshot.instances.length} instance(s) from ${configPath}`)
} catch (error) {
  app.log.error(error)
  await app.close().catch(() => {})
  process.exitCode = 1
}