import {z} from 'zod'

export type GetApiV1FxPairsArgs = {'X-API-Key'?: string | undefined, onBehalfOf?: string | undefined};

export type GetApiV1FxPairsOptions = {baseUrl?: string | undefined, bearer?: string | undefined, fetch?: typeof fetch | undefined};

export const fxPairOptionDto = z.object({sourceCurrency: z.string(), destinationCurrency: z.string()});

export const fxPairsListResponseDto = z.object({pairs: z.array(fxPairOptionDto)});

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 FX pairs enabled for the organization
 * 
 * GET /v1/fx/pairs
 * 
 * Also accepts auth: bearer
 */
export const getApiV1FxPairs = async (args: GetApiV1FxPairsArgs, options?: GetApiV1FxPairsOptions) => {
const {baseUrl = "https://sandbox.api.infinite.dev", fetch: fetchFn = fetch, bearer} = options ?? {}

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

if (args['X-API-Key'] != null) headers.set("X-API-Key", String(args['X-API-Key']))
if (args.onBehalfOf != null) query.append("onBehalfOf", String(args.onBehalfOf))
if (bearer !== undefined) headers.set('authorization', `Bearer ${bearer}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/fx/pairs${query.size > 0 ? `?${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(fxPairsListResponseDto, await res.json())
};