import {z} from 'zod'

export type GetApiWorkflowIdResultArgs = {id: string};

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

export const workflowResultStatus = z.enum(["completed", "failed", "cancelled", "terminated", "timed_out", "continued_as_new"]);

export const traceInfoV2 = z.object({local: z.string().optional(), remote: z.string().optional()}).nullable();

export const serializedWorkflowError = z.object({activityType: z.string().optional(), name: z.string().optional(), message: z.string().optional()}).and(z.record(z.string(), z.unknown())).nullable();

export const workflowResultV2Response = z.object({v: z.literal("2"), workflowId: z.string(), runId: z.string().nullable(), status: workflowResultStatus, input: z.unknown(), output: z.unknown(), trace: traceInfoV2, error: serializedWorkflowError.nullable()});

export const traceInfoV1 = z.object({destinations: z.object({local: z.string().optional(), remote: z.string().optional()}).optional()}).nullable();

export const workflowResultV1Response = z.object({workflowId: z.string(), runId: z.string().nullable(), status: workflowResultStatus, input: z.unknown(), output: z.unknown(), trace: traceInfoV1, error: z.string().nullable(), errorDetails: z.object({message: z.string().nullable().optional(), name: z.string().nullable().optional(), retryable: z.boolean().nullable().optional(), activityId: z.string().nullable().optional(), cause: z.record(z.string(), z.unknown()).nullable().optional()}).nullable()});

export const workflowResultResponse = z.union([workflowResultV2Response, workflowResultV1Response]);

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
};

/**
 * Return the result of a workflow (latest run)
 * 
 * GET /workflow/{id}/result
 */
export const getApiWorkflowIdResult = async (args: GetApiWorkflowIdResultArgs, options?: GetApiWorkflowIdResultOptions) => {
const {baseUrl = "http://localhost:3001", fetch: fetchFn = fetch} = options ?? {}

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

const url = `${baseUrl.replace(/\/+$/, '')}/workflow/${encodeURIComponent(String(args.id))}/result${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "GET", headers})

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

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