import {z} from 'zod'

export type Step = {type?: string | undefined, id?: string | undefined, attributes?: ({name?: string | undefined, output?: string | undefined, status?: ('pending' | 'waitingApproval' | 'approved' | 'queue' | 'running' | 'completed' | 'rejected' | 'cancelled' | 'failed') | undefined, stepNumber?: number | undefined}) | undefined, relationships?: ({job?: ({id?: string | undefined, type?: 'job' | undefined}) | undefined}) | undefined};

export type CreateApiStepArgs = {body: {data?: Step | undefined}};

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

export const step = z.object({type: z.string().optional(), id: z.string().optional(), attributes: z.object({name: z.string().optional(), output: z.string().optional(), status: z.enum(["pending", "waitingApproval", "approved", "queue", "running", "completed", "rejected", "cancelled", "failed"]).optional(), stepNumber: z.number().int().optional()}).optional(), relationships: z.object({job: z.object({id: z.string().optional(), type: z.literal("job").optional()}).optional()}).optional()});

export const createApiStepResponse = z.object({data: step.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
};

/**
 * Creates an item of type step
 * 
 * POST /step
 */
export const createApiStep = async (args: CreateApiStepArgs, options: CreateApiStepOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

const url = `${baseUrl.replace(/\/+$/, '')}/step${query.size > 0 ? `?${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(createApiStepResponse, await res.json())
};