import crypto from 'crypto'

const NAVIDROME_URL = process.env.NAVIDROME_URL || 'https://music.jefflix.lol'
const NAVIDROME_USER = process.env.NAVIDROME_USER || ''
const NAVIDROME_PASS = process.env.NAVIDROME_PASS || ''

function subsonicAuth() {
  const salt = crypto.randomBytes(6).toString('hex')
  const token = crypto.createHash('md5').update(NAVIDROME_PASS + salt).digest('hex')
  return { u: NAVIDROME_USER, t: token, s: salt, v: '1.16.1', c: 'jefflix', f: 'json' }
}

function buildUrl(path: string, params: Record<string, string> = {}) {
  const auth = subsonicAuth()
  const url = new URL(`/rest/${path}`, NAVIDROME_URL)
  for (const [k, v] of Object.entries({ ...auth, ...params })) {
    url.searchParams.set(k, v)
  }
  return url.toString()
}

/** JSON response from Subsonic API (parsed) */
export async function navidromeGet<T = Record<string, unknown>>(
  path: string,
  params: Record<string, string> = {}
): Promise<T> {
  const url = buildUrl(path, params)
  const res = await fetch(url, { cache: 'no-store' })
  if (!res.ok) throw new Error(`Navidrome ${path} returned ${res.status}`)
  const json = await res.json()
  const sub = json['subsonic-response']
  if (sub?.status !== 'ok') {
    throw new Error(sub?.error?.message || `Navidrome error on ${path}`)
  }
  return sub as T
}

/** Raw binary response (for streaming audio, cover art) */
export async function navidromeFetch(
  path: string,
  params: Record<string, string> = {}
): Promise<Response> {
  const url = buildUrl(path, params)
  const res = await fetch(url, { cache: 'no-store' })
  if (!res.ok) throw new Error(`Navidrome ${path} returned ${res.status}`)
  return res
}