import {z} from 'zod'

export type GetApiBalancesIdArgs = {withCurrencyAccountId?: boolean | undefined, balancesAt?: string | undefined};

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

export const balance = z.object({pending: z.number().optional(), available: z.number().optional(), payable: z.number().optional(), collateral: z.number().optional(), operational: z.number().optional(), collateral_breakdown: z.object({fixed_reserve: z.number(), rolling_reserve: z.number()}).optional()});

export const currencyAccountBalance = z.object({currency_account_id: z.string().optional(), descriptor: z.string().optional(), holding_currency: z.string().optional(), balances_as_of: z.string().optional(), balances: balance.optional()});

export const balancesResponse = z.object({data: z.array(currencyAccountBalance).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
};

/**
 * Retrieve entity balances
 * 
 * GET /balances/{id}
 * 
 * Also accepts auth: ApiSecretKey
 */
export const getApiBalancesId = async (args: GetApiBalancesIdArgs, options: GetApiBalancesIdOptions) => {
const {baseUrl, fetch: fetchFn = fetch, OAuth} = options ?? {}

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

if (args.withCurrencyAccountId != null) query.append("withCurrencyAccountId", String(args.withCurrencyAccountId))
if (args.balancesAt != null) query.append("balancesAt", String(args.balancesAt))
if (OAuth !== undefined) headers.set('authorization', `Bearer ${OAuth}`)

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