import {z} from 'zod'

export type GetApiV3BalanceArgs = {currency?: string | undefined, date?: string | undefined, limit?: number | undefined, page?: number | undefined, MID?: string | undefined};

export type GetApiV3BalanceOptions = {baseUrl?: string | undefined, basicAuth?: {username: string, password: string} | undefined, fetch?: typeof fetch | undefined};

export const getApiV3BalanceResponse = z.object({status: z.string().optional(), data: z.object({balance: z.array(z.object({currency: z.string().optional(), totalCollectionsAmount: z.number().optional(), totalPayoutAmount: z.number().optional(), totalPayoutInTransitBalance: z.number().optional(), totalSettledAmount: z.number().optional(), totalUnsettledAmount: z.number().optional(), totalAvailablePrefundingBalance: z.number().optional(), totalPayoutFee: z.number().optional()})).optional(), date: z.string().optional()}).optional(), pagination: z.object({total: z.number().int().optional(), pages: z.number().int().optional(), currentPage: z.number().int().optional(), limit: z.number().int().optional(), hasNext: z.boolean().optional(), hasPrev: z.boolean().optional()}).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 Balance
 * 
 * GET /v3/balance
 */
export const getApiV3Balance = async (args: GetApiV3BalanceArgs, options?: GetApiV3BalanceOptions) => {
const {baseUrl = "https://sandbox-api.transfi.com", fetch: fetchFn = fetch, basicAuth} = options ?? {}

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

if (args.currency != null) query.append("currency", String(args.currency))
if (args.date != null) query.append("date", String(args.date))
if (args.limit != null) query.append("limit", String(args.limit))
if (args.page != null) query.append("page", String(args.page))
if (args.MID != null) headers.set("MID", String(args.MID))
if (basicAuth !== undefined) headers.set('authorization', `Basic ${btoa(`${basicAuth.username}:${basicAuth.password}`)}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v3/balance${query.size > 0 ? `?${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(getApiV3BalanceResponse, await res.json())
};