import {z} from 'zod'

export type SitesCreateWebviewSessionRequestBody = {channel: string, language?: string | undefined, currency?: string | undefined, customer?: {merchant_id: string, email: string} | undefined};

export type CreateApiV2SitesSiteIdWebviewsSessionsArgs = {site_id: number, body: SitesCreateWebviewSessionRequestBody};

export type CreateApiV2SitesSiteIdWebviewsSessionsOptions = {baseUrl?: string | undefined, ProgramApiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const sitesCreateWebviewSessionResponseBody = z.object({webview_session: z.object({url: z.string(), expires_at: 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
};

/**
 * POST /v2/sites/{site_id}/webviews/sessions
 * 
 * Also accepts auth: SiteTokenSecret
 */
export const createApiV2SitesSiteIdWebviewsSessions = async (args: CreateApiV2SitesSiteIdWebviewsSessionsArgs, options?: CreateApiV2SitesSiteIdWebviewsSessionsOptions) => {
const {baseUrl = "https://api.loyaltylion.com", fetch: fetchFn = fetch, ProgramApiKey} = options ?? {}

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

if (ProgramApiKey !== undefined) headers.set('authorization', `Bearer ${ProgramApiKey}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v2/sites/${encodeURIComponent(String(args.site_id))}/webviews/sessions${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(sitesCreateWebviewSessionResponseBody, await res.json())
};