import {z} from 'zod'

export type GetApiTrackingCarriersArgs = {query?: string | undefined, language?: ('en' | 'ru') | undefined, cursor?: string | undefined, limit?: number | undefined};

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

export const trackingInputFieldName = z.enum(["destination_country", "postal_code", "email", "phone", "additional_fields.house_number", "additional_fields.bc_code", "additional_fields.address_key", "additional_fields.consignee_info", "additional_fields.customer_token", "additional_fields.vessel", "additional_fields.voyage"]);

export const trackingInputRequirements = z.object({required: z.array(trackingInputFieldName).optional(), any_of: z.array(trackingInputFieldName).optional(), conditional: z.array(trackingInputFieldName).optional()});

export const trackingCarrier = z.object({slug: z.string(), name: z.string(), input_requirements: trackingInputRequirements.optional()});

export const trackingCarrierCatalogResponse = z.object({query: z.string(), language: z.enum(["en", "ru"]), carriers: z.array(trackingCarrier), total_matches: z.number().int().gte(0), next_cursor: z.string().nullable(), has_more: z.boolean(), catalog_version: 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
};

/**
 * List carrier slugs accepted by carrier_hint
 * 
 * GET /tracking-carriers
 */
export const getApiTrackingCarriers = async (args: GetApiTrackingCarriersArgs, options: GetApiTrackingCarriersOptions) => {
const {baseUrl, fetch: fetchFn = fetch, bearerAuth} = options ?? {}

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

if (args.query != null) query.append("query", String(args.query))
if (args.language != null) query.append("language", String(args.language))
if (args.cursor != null) query.append("cursor", String(args.cursor))
if (args.limit != null) query.append("limit", String(args.limit))
if (bearerAuth !== undefined) headers.set('authorization', `Bearer ${bearerAuth}`)

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