/**
 * Smart-default / snapshot RPC handlers for dynamic UI.
 */
import * as suggestions from '../utils/suggestions.js'
import * as validation from '../utils/validation.js'

export function registerSuggestionHandlers(session) {
  session.respond('getHostSnapshot', async () => suggestions.getHostSnapshot())

  session.respond('suggestNetworkIPAM', async (args = {}) => {
    return suggestions.suggestNetworkIPAM(args)
  })

  session.respond('listUsedHostPorts', async () => suggestions.listUsedHostPorts())

  session.respond('suggestResourceName', async (args) => {
    const kind = args.kind || 'container'
    const base = validation.sanitizeString(args.base || args.name || 'resource', 63)
    return suggestions.suggestResourceName(kind, base)
  })

  session.respond('suggestFromImage', async (args) => {
    const image = validation.sanitizeString(args.image || args.id, 255)
    if (!image) throw new Error('image required')
    return suggestions.suggestFromImage(image)
  })

  session.respond('suggestDefaults', async (args = {}) => {
    const kind = args.kind || 'container'
    if (kind === 'network') {
      const [ipam, name] = await Promise.all([
        suggestions.suggestNetworkIPAM(args),
        suggestions.suggestResourceName('network', args.base || 'net'),
      ])
      return {
        success: true,
        kind: 'network',
        name: name.name,
        driver: args.driver || (ipam.driver || 'bridge'),
        subnet: ipam.subnet,
        gateway: ipam.gateway,
        ipam,
      }
    }
    if (kind === 'volume') {
      const name = await suggestions.suggestResourceName('volume', args.base || 'data')
      return { success: true, kind: 'volume', name: name.name, driver: 'local' }
    }
    if (kind === 'container' && args.image) {
      return suggestions.suggestFromImage(args.image)
    }
    if (kind === 'stack') {
      const name = await suggestions.suggestResourceName('stack', args.base || 'stack')
      return { success: true, kind: 'stack', name: name.name }
    }
    const snap = await suggestions.getHostSnapshot()
    return { success: true, kind, snapshot: snap }
  })
}