import {z} from 'zod'

export type GetApiPromosArgs = {_limit: number, _offset: number, brand?: string | undefined, country?: string | undefined, language?: string | undefined, region?: ('Africa' | 'Asia' | 'Caribbean' | 'Central America' | 'Eastern Europe' | 'Global' | 'Middle East and North Africa' | 'North America' | 'Oceania' | 'South America' | 'South Asia' | 'Southeast Asia' | 'Western Europe') | undefined, status?: ('active' | 'expired' | 'pending') | undefined};

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

export const dtoOfferBrand = z.object({brand: z.string(), brandName: z.string()});

export const dtoPromoDescription = z.object({description: z.string().optional(), language: z.string().optional(), terms: z.string().optional()});

export const dtoPromoStatus = z.enum(["active", "expired", "pending"]);

export const dtoPromo = z.object({brand: dtoOfferBrand.optional(), country: z.string().optional(), createdAt: z.string().optional(), dataBonusGB: z.number().optional(), dataMultiplier: z.number().optional(), description: z.array(dtoPromoDescription).optional(), endAt: z.string().optional(), id: z.string().optional(), maxValue: z.number().int().optional(), minValue: z.number().int().optional(), offerIds: z.array(z.string()).optional(), regions: z.array(z.string()).optional(), smsBonusNumber: z.number().int().optional(), smsMultiplier: z.number().optional(), startAt: z.string().optional(), status: dtoPromoStatus.optional(), updatedAt: z.string().optional(), valueBonus: z.number().int().optional(), valueMultiplier: z.number().optional(), voiceBonusMinutes: z.number().int().optional(), voiceMultiplier: z.number().optional()});

export const dtoPromosResponse = z.object({limit: z.number().int().optional(), list: z.array(dtoPromo).optional(), offset: z.number().int().optional(), total: z.number().int().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
};

/**
 * Get list of promotions
 * 
 * GET /promos
 */
export const getApiPromos = async (args: GetApiPromosArgs, options: GetApiPromosOptions) => {
const {baseUrl, fetch: fetchFn = fetch, ApiKey} = options ?? {}

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

if (args._limit != null) query.append("_limit", String(args._limit))
if (args._offset != null) query.append("_offset", String(args._offset))
if (args.brand != null) query.append("brand", String(args.brand))
if (args.country != null) query.append("country", String(args.country))
if (args.language != null) query.append("language", String(args.language))
if (args.region != null) query.append("region", String(args.region))
if (args.status != null) query.append("status", String(args.status))
if (ApiKey !== undefined) headers.set("Authorization", ApiKey)

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