import { getUniResolver } from '@sphereon/did-uni-client'
import { DIDDocument as DIFDIDDocument, Resolvable, Resolver, ResolverRegistry } from 'did-resolver'

import { SIOPErrors } from '..'

export interface DIDDocument extends DIFDIDDocument {
  owner?: string
  created?: string
  updated?: string
  proof?: LinkedDataProof
}

export interface LinkedDataProof {
  type: string
  created: string
  creator: string
  nonce: string
  signatureValue: string
}

export function getResolver(methods: string | string[]): Resolvable {
  function getMethodFromDid(did: string): string {
    if (!did) {
      throw new Error(SIOPErrors.BAD_PARAMS)
    }
    const split = did.split(':')
    if (split.length == 1 && did.length > 0) {
      return did
    } else if (!did.startsWith('did:') || split.length < 2) {
      throw new Error(SIOPErrors.BAD_PARAMS)
    }

    return split[1]
  }

  const uniResolvers: ResolverRegistry[] = []
  for (const didMethod of typeof methods === 'string' ? [methods] : methods) {
    const uniResolver = getUniResolver(getMethodFromDid(didMethod))
    uniResolvers.push(uniResolver)
  }
  return new Resolver(...uniResolvers)
}