import type { Argv, InferredOptionTypes } from "yargs"
import type { Config } from "../config/config"

const options = {
  port: {
    type: "number" as const,
    describe: "port to listen on",
    default: 0,
  },
  hostname: {
    type: "string" as const,
    describe: "hostname to listen on",
    default: "127.0.0.1",
  },
  mdns: {
    type: "boolean" as const,
    describe: "enable mDNS service discovery (defaults hostname to 0.0.0.0)",
    default: false,
  },
}

export type NetworkOptions = InferredOptionTypes<typeof options>

export function withNetworkOptions<T>(yargs: Argv<T>) {
  return yargs.options(options)
}

export function resolveNetworkOptions(args: NetworkOptions, config?: Config.Info) {
  const portExplicitlySet = process.argv.includes("--port")
  const hostnameExplicitlySet = process.argv.includes("--hostname")
  const mdnsExplicitlySet = process.argv.includes("--mdns")

  const mdns = mdnsExplicitlySet ? args.mdns : (config?.server?.mdns ?? args.mdns)
  const port = portExplicitlySet ? args.port : (config?.server?.port ?? args.port)
  const hostname = hostnameExplicitlySet
    ? args.hostname
    : mdns && !config?.server?.hostname
      ? "0.0.0.0"
      : (config?.server?.hostname ?? args.hostname)

  return { hostname, port, mdns }
}