import {z} from 'zod'

export type OfferTitleCreate = {text: string, fontColor: string, fontSize: number, fontWeight: string};

export type PostPurchasePopupDesignCreate = {offerUiType: 'PopUp', name: string, externalId: string, backgroundImageUrl: string, title?: OfferTitleCreate | undefined, offerUiSubType: 'PostPurchase'};

export type CreateApiComponentsV1OfferDesignArgs = {body: PostPurchasePopupDesignCreate};

export type CreateApiComponentsV1OfferDesignOptions = {baseUrl: string, fetch?: typeof fetch | undefined};

export const offerTitleResponse = z.object({text: z.string().optional(), fontColor: z.string().optional(), fontSize: z.number().optional(), fontWeight: z.string().optional()});

export const postPurchasePopupDesignResponse = z.object({id: z.string().optional(), offerUiType: z.literal("PopUp").optional(), name: z.string().optional(), externalId: z.string().optional(), backgroundImageUrl: z.string().optional(), title: offerTitleResponse.optional(), externalBackgroundImageUrl: z.string().optional(), offerUiSubType: z.literal("PostPurchase").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 a post purchase popup design.
 * 
 * POST /components/v1/offer-design
 */
export const createApiComponentsV1OfferDesign = async (args: CreateApiComponentsV1OfferDesignArgs, options: CreateApiComponentsV1OfferDesignOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

const url = `${baseUrl.replace(/\/+$/, '')}/components/v1/offer-design${query.size > 0 ? `?${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(postPurchasePopupDesignResponse, await res.json())
};