import {z} from 'zod'

export type V1CredentialMintLevel = 'L2' | 'L3';

export type V1CredentialAgentKey = {kty?: 'OKP' | undefined, crv?: 'Ed25519' | undefined, x: string, kid?: (string | null) | undefined};

export type V1DisclosureMode = 'CLEARTEXT_AND_HASH' | 'HASH_ONLY';

export type V1IndividualCredentialMintRequest = {principal_ref: string, level: V1CredentialMintLevel, audience: string, agent_key: V1CredentialAgentKey, disclosed_fields?: Array<string> | undefined, disclosure_mode?: V1DisclosureMode | undefined};

export type CreateApiCredentialsIndividualArgs = {body: V1IndividualCredentialMintRequest};

export type CreateApiCredentialsIndividualOptions = {baseUrl?: string | undefined, APIKeyHeader?: string | undefined, fetch?: typeof fetch | undefined};

export const v1IssuedCredentialType = z.enum(["L2", "L3", "COUNTERPARTY"]);

export const v1CredentialMintResponse = z.object({credential: z.string(), credential_type: v1IssuedCredentialType, jti: z.string(), principal_ref: z.string(), business_ref: z.string().nullable().optional(), audience: z.string(), issued_at: z.string(), expires_at: z.string(), disclosed_fields: z.array(z.string()).optional(), active_keys: z.array(z.string()).optional()});

export const validateResponse = async <Output>(
  schema: {
    readonly '~standard': {
      readonly validate: (value: unknown) => ({ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }) | Promise<{ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }>
    }
  },
  value: unknown
): Promise<Output> => {
  const result = await schema['~standard'].validate(value)

  if (result.issues !== undefined) {
    const detail = result.issues
      .map(({ message, path }) =>
        path?.length
          ? `${path.map((segment) => String(typeof segment === 'object' ? segment.key : segment)).join('.')}: ${message}`
          : message
      )
      .join('; ')

    throw new Error(`Response does not match the schema: ${detail}`, { cause: { issues: result.issues } })
  }

  return result.value
};

/**
 * Mint a credential for a person as themselves
 * 
 * POST /credentials/individual
 */
export const createApiCredentialsIndividual = async (args: CreateApiCredentialsIndividualArgs, options?: CreateApiCredentialsIndividualOptions) => {
const {baseUrl = "https://api.baselayer.com", fetch: fetchFn = fetch, APIKeyHeader} = options ?? {}

const query = new URLSearchParams()
const headers = new Headers()
headers.set('content-type', "application/json")
headers.set('accept', "application/json")

if (APIKeyHeader !== undefined) headers.set("X-API-Key", APIKeyHeader)

const url = `${baseUrl.replace(/\/+$/, '')}/credentials/individual${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "POST", headers, body: JSON.stringify(args.body)})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(v1CredentialMintResponse, await res.json())
};