import {z} from 'zod'

export type BepKey = string;

export type GetApiBepBepKeyArgs = {bepKey: BepKey};

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

export const bepKey = z.string();

export const schemasAmountValue = z.number().int().gte(0).lte(900000000);

export const componentsSchemasCurrencyCode = z.literal("EUR");

export const schemasAmount = z.object({value: schemasAmountValue, currency: componentsSchemasCurrencyCode});

export const schemasVersion = z.number().int();

export const bepInitiatedResponse = z.object({authenticationStatus: z.literal("initiated"), key: bepKey, amount: schemasAmount, authenticationMethod: z.enum(["bancontactIntent", "qrCode"]), created: z.string(), version: schemasVersion});

export const schemasExpiryMonth = z.number().int().gte(1).lte(12);

export const schemasExpiryYear = z.number().int().gte(2020).lte(2050);

export const schemasPan = z.string();

export const authenticationMethod = z.enum(["bancontactIntent", "qrCode"]);

export const bepSuccessResponse = z.object({authenticationStatus: z.literal("authenticated"), key: bepKey, amount: schemasAmount, card: z.object({expiryMonth: schemasExpiryMonth, expiryYear: schemasExpiryYear, number: schemasPan}), bepaf: z.string().min(1).max(28), authenticationMethod: authenticationMethod, created: z.string(), version: schemasVersion});

export const bepFailResponse = z.object({authenticationStatus: z.literal("non-authenticated"), key: bepKey, amount: schemasAmount, authenticationMethod: z.enum(["bancontactIntent", "qrCode"]), created: z.string(), version: schemasVersion});

export const bepResponse = z.union([bepInitiatedResponse, bepSuccessResponse, bepFailResponse]);

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 BEP
 * 
 * GET /bep/{bepKey}
 * 
 * Also accepts auth: BearerToken
 */
export const getApiBepBepKey = async (args: GetApiBepBepKeyArgs, options?: GetApiBepBepKeyOptions) => {
const {baseUrl = "https://eu-west-1.api.silverflow.com/v1", fetch: fetchFn = fetch, ApiKey} = options ?? {}

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

if (ApiKey !== undefined) headers.set('authorization', `Basic ${btoa(`${ApiKey.username}:${ApiKey.password}`)}`)

const url = `${baseUrl.replace(/\/+$/, '')}/bep/${encodeURIComponent(String(args.bepKey))}${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(bepResponse, await res.json())
};