import { SpecValidationResult, VerificationMethods } from "@cheqd/sdk";
import { DidDocument } from "@credo-ts/core";

export function validateSpecCompliantPayload(
  didDocument: DidDocument
): SpecValidationResult {
  // id is required, validated on both compile and runtime
  if (!didDocument.id && !didDocument.id.startsWith("did:near:"))
    return { valid: false, error: "id is required" };

  // verificationMethod is required
  if (!didDocument.verificationMethod)
    return { valid: false, error: "verificationMethod is required" };

  // verificationMethod must be an array
  if (!Array.isArray(didDocument.verificationMethod))
    return { valid: false, error: "verificationMethod must be an array" };

  // verificationMethod must be not be empty
  if (!didDocument.verificationMethod.length)
    return { valid: false, error: "verificationMethod must be not be empty" };

  // verificationMethod types must be supported
  const isValidVerificationMethod = didDocument.verificationMethod.every(
    (vm) => {
      switch (vm.type) {
        case VerificationMethods.Ed255192020:
          return vm.publicKeyMultibase != null;
        case VerificationMethods.JWK:
          return vm.publicKeyJwk != null;
        case VerificationMethods.Ed255192018:
          return vm.publicKeyBase58 != null;
        default:
          return false;
      }
    }
  );

  if (!isValidVerificationMethod)
    return { valid: false, error: "verificationMethod publicKey is Invalid" };

  const isValidService = didDocument.service
    ? didDocument?.service?.every((s) => {
        return s?.serviceEndpoint && s?.id && s?.type;
      })
    : true;

  if (!isValidService) return { valid: false, error: "Service is Invalid" };
  return { valid: true } as SpecValidationResult;
}