import {z} from 'zod'

export type GetApiV1UsersMeOnboardingStateArgs = {Authorization?: string | undefined};

export type GetApiV1UsersMeOnboardingStateOptions = {baseUrl?: string | undefined, fetch?: typeof fetch | undefined};

export const getApiV1UsersMeOnboardingStateResponse = z.object({links: z.object({self: z.string()}), data: z.object({id: z.string(), type: z.literal("onboarding-state"), attributes: z.object({onboardingCompleted: z.boolean(), onboardingCompletedAt: z.string().nullable(), cliLastSeenAt: z.string().nullable(), cliLastVersion: z.string().nullable(), state: z.object({flowSlug: z.string().nullable(), path: z.union([z.literal("cli"), z.literal("web")]), chosenVia: z.union([z.literal("picker"), z.literal("deep-link"), z.literal("default")]).nullable(), currentBeatOrder: z.number().int(), skippedBeatOrders: z.array(z.number().int()), startedAt: z.string(), lastActivityAt: z.string(), setupSubmittedAt: z.string().nullable(), completedAt: z.string().nullable()}).nullable(), facts: z.record(z.string(), z.union([z.string(), z.number(), z.boolean(), z.array(z.string())]))})})});

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
};

/**
 * Returns the authenticated user's onboarding state — chosen flow, current beat, entry path, and skips — plus the authoritative completion flag.
 * 
 * GET /v1/users/me/onboarding-state
 */
export const getApiV1UsersMeOnboardingState = async (args: GetApiV1UsersMeOnboardingStateArgs, options?: GetApiV1UsersMeOnboardingStateOptions) => {
const {baseUrl = "https://api.tessl.io", fetch: fetchFn = fetch} = options ?? {}

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

if (args.Authorization != null) headers.set("Authorization", String(args.Authorization))

const url = `${baseUrl.replace(/\/+$/, '')}/v1/users/me/onboarding-state${query.size > 0 ? `?${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(getApiV1UsersMeOnboardingStateResponse, await res.json())
};