import {z} from 'zod'

export type PromotionsStacksCreateRequestBody = {name: string, tiers: {ids: Array<string>, hierarchy_mode?: 'MANUAL' | undefined}, category_id?: string | undefined};

export type CreateApiV1PromotionsCampaignIdStacksArgs = {body: PromotionsStacksCreateRequestBody};

export type CreateApiV1PromotionsCampaignIdStacksOptions = {baseUrl?: string | undefined, XAppId?: string | undefined, XAppToken?: string | undefined, fetch?: typeof fetch | undefined};

export const promotionStackBase = z.object({name: z.string(), tiers: z.object({ids: z.array(z.string()), hierarchy_mode: z.literal("MANUAL").optional()})});

export const promotionsStacksCreateResponseBody = z.object({name: z.string(), tiers: z.object({ids: z.array(z.string()), hierarchy_mode: z.literal("MANUAL").optional()}), id: z.string(), created_at: z.string(), campaign_id: z.string(), object: z.literal("promotion_stack"), category_id: z.string().nullable(), categories: z.array(promotionStackBase)});

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
};

/**
 * Create Promotion Stack
 * 
 * POST /v1/promotions/{campaignId}/stacks
 * 
 * Also accepts auth: X-Voucherify-OAuth
 */
export const createApiV1PromotionsCampaignIdStacks = async (args: CreateApiV1PromotionsCampaignIdStacksArgs, options?: CreateApiV1PromotionsCampaignIdStacksOptions) => {
const {baseUrl = "https://api.voucherify.io", fetch: fetchFn = fetch, XAppId, XAppToken} = options ?? {}

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

if (XAppId !== undefined) headers.set("X-App-Id", XAppId)
if (XAppToken !== undefined) headers.set("X-App-Token", XAppToken)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/promotions/${encodeURIComponent(String(args.campaignId))}/stacks${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(promotionsStacksCreateResponseBody, await res.json())
};