import {z} from 'zod'

export type AuthzRequest = {conversationId?: (string | null) | undefined, requestId?: string | undefined, threadId?: string | undefined, sequenceNumber?: number | undefined, applicationKey?: string | undefined, clientApplicationKey?: string | undefined, enforce?: boolean | undefined, userId?: string | undefined, requestType?: string | undefined, traits?: Array<string> | undefined, context?: (Record<string, never> | null) | undefined, requestDateTime?: string | undefined};

export type CreateApiAuthzServiceApiAuthzArgs = {body: AuthzRequest};

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

export const authzResponse = z.object({authorized: z.boolean().optional(), enforce: z.boolean().optional(), requestId: z.string().optional(), requestDateTime: z.string().optional(), userId: z.string().optional(), applicationName: z.string().optional(), maskedTraits: z.record(z.string(), z.string()).nullable().optional(), context: z.object({}).nullable().optional(), statusCode: z.number().int().optional(), statusMessage: z.string().optional(), reason: z.string().optional(), paigPolicyIds: z.array(z.number().int()).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
};

/**
 * Authorize
 * 
 * POST /authz-service/api/authz
 */
export const createApiAuthzServiceApiAuthz = async (args: CreateApiAuthzServiceApiAuthzArgs, options: CreateApiAuthzServiceApiAuthzOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

const url = `${baseUrl.replace(/\/+$/, '')}/authz-service/api/authz${query.size > 0 ? `?${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(authzResponse, await res.json())
};