import {z} from 'zod'

export type GetApiOauthAmplitudeAuthorizeArgs = {instance_id: string, redirect_url?: (string | null) | undefined, force_refresh?: boolean | undefined};

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

export const getApiOauthAmplitudeAuthorizeResponse = z.unknown();

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 Amplitude
 * 
 * GET /oauth/amplitude/authorize
 */
export const getApiOauthAmplitudeAuthorize = async (args: GetApiOauthAmplitudeAuthorizeArgs, options?: GetApiOauthAmplitudeAuthorizeOptions) => {
const {baseUrl = "https://api.klavis.ai", fetch: fetchFn = fetch} = options ?? {}

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

if (args.instance_id != null) query.append("instance_id", String(args.instance_id))
if (args.redirect_url != null) query.append("redirect_url", String(args.redirect_url))
if (args.force_refresh != null) query.append("force_refresh", String(args.force_refresh))

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