import { die } from "../fmt.ts"
import * as config from "../config.ts"

const VALID_KEYS = Object.keys(config.DEFAULTS) as config.Key[]

export async function action(args: string[]) {
  if (args.length === 0) {
    const cfg = await config.load()
    for (const key of VALID_KEYS) {
      const val = cfg[key]
      const display = val ?? `${config.DEFAULTS[key]} (default)`
      console.log(`${key} = ${display}`)
    }
    return
  }

  const [key, ...rest] = args
  if (!VALID_KEYS.includes(key as config.Key)) die(`Unknown config key: ${key}\nAvailable keys: ${VALID_KEYS.join(", ")}`)

  if (rest.length === 0) {
    const val = await config.get(key as config.Key)
    console.log(val ?? `${config.DEFAULTS[key as config.Key]} (default)`)
    return
  }

  if (rest.length > 1) die(`Too many arguments. Usage: sandlot config ${key} <value>`)

  let normalized: string
  try { normalized = config.validateMemory(rest[0]) } catch { return die("Must be a number followed by G or M, minimum 512M (e.g. 16G)") }
  await config.set("memory", normalized)
  console.log(`memory = ${normalized}`)
}