import Fastify from 'fastify'
import fastifyStatic from '@fastify/static'
import path from 'node:path'
import { fileURLToPath } from 'node:url'
import {
  addInstanceToConfig,
  buildClients,
  collectInstanceStatus,
  createSimAdminClient,
  deleteInstanceFromConfig,
  loadConfig,
  proxyToInstance,
  redactInstance,
  updateInstanceInConfig,
} from './core.js'

const __filename = fileURLToPath(import.meta.url)
const __dirname = path.dirname(__filename)
const ROOT = path.resolve(__dirname, '..')
const PUBLIC_DIR = path.join(ROOT, 'public')
const CONFIG_PATH = process.env.MULTI_SIMADMIN_CONFIG || path.join(ROOT, 'config.json')
const DEFAULT_CONFIG_PATH = path.join(ROOT, 'config.example.json')

const config = await loadConfig({ configPath: CONFIG_PATH, defaultConfigPath: DEFAULT_CONFIG_PATH })
const clients = buildClients(config.instances)
const app = Fastify({ logger: true, bodyLimit: 60 * 1024 * 1024 })

await app.register(fastifyStatic, { root: PUBLIC_DIR, prefix: '/' })

function clientById(id, reply) {
  const client = clients.get(id)
  if (!client) reply.code(404).send({ error: 'instance not found' })
  return client
}

function sendConfigError(reply, error) {
  const message = String(error?.message || error)
  const status = /not found/.test(message) ? 404 : /duplicate|required|invalid|URL/.test(message) ? 400 : 500
  return reply.code(status).send({ error: message })
}

function refreshClientFor(instance) {
  clients.set(instance.id, createSimAdminClient(instance))
}

app.get('/api/config', async () => ({
  configPath: config.configPath,
  instances: config.instances.map(redactInstance),
  features: [
    'passwordless-status',
    'password-session-login',
    'read-write-api-proxy',
    'device-sim-network-sms-data-ota-summary',
    'iframe-fallback',
  ],
}))

app.get('/api/instances', async () => ({ instances: config.instances.map(redactInstance) }))

app.post('/api/instances', async (request, reply) => {
  try {
    const instance = await addInstanceToConfig(config, request.body || {})
    refreshClientFor(instance)
    return { instance: redactInstance(instance), configPath: config.configPath }
  } catch (error) {
    return sendConfigError(reply, error)
  }
})

app.put('/api/instances/:id', async (request, reply) => {
  try {
    const oldId = request.params.id
    const instance = await updateInstanceInConfig(config, oldId, request.body || {})
    if (instance.id !== oldId) clients.delete(oldId)
    refreshClientFor(instance)
    return { instance: redactInstance(instance), configPath: config.configPath }
  } catch (error) {
    return sendConfigError(reply, error)
  }
})

app.delete('/api/instances/:id', async (request, reply) => {
  try {
    const removed = await deleteInstanceFromConfig(config, request.params.id)
    clients.delete(removed.id)
    return { removed: redactInstance(removed), configPath: config.configPath }
  } catch (error) {
    return sendConfigError(reply, error)
  }
})

app.get('/api/status', async () => ({
  instances: await Promise.all([...clients.values()].map(collectInstanceStatus)),
}))

app.get('/api/status/:id', async (request, reply) => {
  const client = clientById(request.params.id, reply)
  if (!client) return
  return collectInstanceStatus(client)
})

app.post('/api/instances/:id/login', async (request, reply) => {
  const client = clientById(request.params.id, reply)
  if (!client) return
  const password = request.body?.password || client.instance.auth?.password || ''
  if (password) client.instance.auth.password = String(password)
  const result = await client.ensureAuthenticated()
  return { ...result, hasSavedPassword: Boolean(client.instance.auth?.password) }
})

app.post('/api/instances/:id/logout', async (request, reply) => {
  const client = clientById(request.params.id, reply)
  if (!client) return
  try { await client.fetchJson('/api/auth/logout', { method: 'POST' }) } catch {}
  client.jar.clear()
  return { ok: true }
})

app.all('/api/proxy/:id/*', async (request, reply) => {
  const client = clientById(request.params.id, reply)
  if (!client) return
  return proxyToInstance({ client, request, reply, rest: request.params['*'] })
})

app.get('/api/catalog', async () => ({
  groups: [
    { id: 'overview', name: '总览', endpoints: ['/api/device', '/api/sim', '/api/network', '/api/stats', '/api/connectivity'] },
    { id: 'sms', name: '短信', endpoints: ['/api/sms/stats', '/api/sms/list', '/api/sms/send', '/api/sms/conversation'] },
    { id: 'network', name: '网络/小区', endpoints: ['/api/data', '/api/roaming', '/api/airplane-mode', '/api/radio-mode', '/api/band-lock', '/api/cell-lock', '/api/apn', '/api/cells'] },
    { id: 'device-network', name: '设备网络', endpoints: ['/api/device-network/ddns/status', '/api/device-network/ddns/config', '/api/device-network/wlan/status', '/api/device-network/wlan/profiles'] },
    { id: 'calls', name: '电话', endpoints: ['/api/calls', '/api/call/history', '/api/ims/status', '/api/voicemail/status'] },
    { id: 'esim', name: 'eSIM', endpoints: ['/api/work-mode', '/api/esim/config', '/api/esim/lpac/status', '/api/esim/euicc', '/api/esim/profiles'] },
    { id: 'notify-auto-ota', name: '通知/自动化/升级', endpoints: ['/api/notifications/config', '/api/notifications/logs', '/api/automation/config', '/api/automation/logs', '/api/ota/status'] },
  ],
}))

app.get('/api/reload-note', async () => ({ message: 'Edit config.json and restart this process to apply changes.' }))

app.setNotFoundHandler(async (request, reply) => {
  if (request.url.startsWith('/api/')) return reply.code(404).send({ error: 'not found' })
  return reply.sendFile('index.html')
})

try {
  await app.listen({ host: config.server.host, port: config.server.port })
  app.log.info(`Multi SimAdmin listening on http://${config.server.host}:${config.server.port}`)
  app.log.info(`Loaded ${config.instances.length} instance(s) from ${config.configPath}`)
} catch (err) {
  app.log.error(err)
  process.exit(1)
}