import {z} from 'zod'

export type GetApiEsimOffersArgs = {_limit: number, _offset: number, brand?: string | undefined, country?: string | undefined, regions?: ('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, subType?: string | undefined};

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

export const dtoCost = z.object({currency: z.string(), currencyDivisor: z.number().int(), discount: z.number(), fee: z.number().int(), feePct: z.number(), fixed: z.number().int().optional(), fx: z.number().optional(), max: z.number().int().optional(), min: z.number().int().optional()});

export const dtoPrice = z.object({currency: z.string(), currencyDivisor: z.number().int(), fee: z.number().int(), fixed: z.number().int().optional(), fx: z.number().optional(), increment: z.number().int().optional(), margin: z.number().optional(), max: z.number().int().optional(), min: z.number().int().optional(), suggestedFixed: z.number().int().optional(), suggestedFx: z.number().optional()});

export const dtoPriceType = z.enum(["FIXED", "RANGE"]);

export const dtoProductType = z.enum(["TOPUP", "ESIM", "VOUCHER", "BILL_PAY", "WALLET_RECHARGE", "REFUND", "BULK_CHECKOUT"]);

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

export const dtoESimRoaming = z.object({country: z.string(), dataSpeeds: z.array(z.string()), networks: z.array(dtoESimNetwork)});

export const dtoESimOffer = z.object({brand: z.string(), brandName: z.string(), cost: dtoCost, country: z.string(), createdAt: z.string(), dataGB: z.number(), dataSpeeds: z.array(z.string()), dataUnlimited: z.boolean(), durationDays: z.number().int(), enabled: z.boolean(), notes: z.string(), offerId: z.string(), price: dtoPrice, priceType: dtoPriceType, productType: dtoProductType, regions: z.array(z.string()), roaming: z.array(dtoESimRoaming), shortNotes: z.string(), smsNumber: z.number().int(), smsUnlimited: z.boolean(), subTypes: z.array(z.string()), updatedAt: z.string(), voiceMinutes: z.number().int(), voiceUnlimited: z.boolean()});

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

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 eSIM offers
 * 
 * GET /esim/offers
 */
export const getApiEsimOffers = async (args: GetApiEsimOffersArgs, options: GetApiEsimOffersOptions) => {
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.regions != null) query.append("regions", String(args.regions))
if (args.subType != null) query.append("subType", String(args.subType))
if (ApiKey !== undefined) headers.set("Authorization", ApiKey)

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