import {z} from 'zod'

export type GetApiV1MinAmountArgs = {currency_from?: string | undefined, currency_to?: string | undefined, fiat_equivalent?: string | undefined, is_fixed_rate?: string | undefined, is_fee_paid_by_user?: string | undefined, 'x-api-key'?: string | undefined};

export type GetApiV1MinAmountOptions = {baseUrl?: string | undefined, fetch?: typeof fetch | undefined};

export const getApiV1MinAmountResponse = z.object({currency_from: z.string().optional(), currency_to: z.string().optional(), min_amount: z.number().optional(), fiat_equivalent: z.number().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 the minimum payment amount
 * 
 * GET /v1/min-amount
 */
export const getApiV1MinAmount = async (args: GetApiV1MinAmountArgs, options?: GetApiV1MinAmountOptions) => {
const {baseUrl = "https://api.nowpayments.io", fetch: fetchFn = fetch} = options ?? {}

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

if (args.currency_from != null) query.append("currency_from", String(args.currency_from))
if (args.currency_to != null) query.append("currency_to", String(args.currency_to))
if (args.fiat_equivalent != null) query.append("fiat_equivalent", String(args.fiat_equivalent))
if (args.is_fixed_rate != null) query.append("is_fixed_rate", String(args.is_fixed_rate))
if (args.is_fee_paid_by_user != null) query.append("is_fee_paid_by_user", String(args.is_fee_paid_by_user))
if (args['x-api-key'] != null) headers.set("x-api-key", String(args['x-api-key']))

const url = `${baseUrl.replace(/\/+$/, '')}/v1/min-amount${query.size > 0 ? `?${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(getApiV1MinAmountResponse, await res.json())
};