import {z} from 'zod'

export type ShareClassSymbol = 'EUTBL' | 'USTBL' | 'eurUSTBL' | 'SPKCC' | 'eurSPKCC' | 'UKTBL' | 'eurUKTBL' | 'SAFO' | 'SAFOd' | 'eurSAFO' | 'eurSAFOd' | 'gbpSAFO' | 'gbpSAFOd' | 'chfSAFO' | 'sekSAFO' | 'nokSAFO' | 'dkkSAFO' | 'plnSAFO' | 'hufSAFO' | 'czkSAFO' | 'SAFO-DATED-DEV' | 'eurSAFO-DATED-DEV' | 'gbpSAFO-DATED-DEV';

export type GetApiIndexValuesShareClassSymbolArgs = {shareClassSymbol: ShareClassSymbol, startDay: string};

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

export const day = z.string();

export const currencyCode = z.enum(["EUR", "USD", "GBP", "CHF", "JPY", "SGD", "SEK", "NOK", "DKK", "PLN", "HUF", "CZK"]);

export const nonNegativeAmountEncoded = z.object({value: z.string(), currency: currencyCode});

export const getApiIndexValuesShareClassSymbolResponse = z.array(z.object({day: day, amount: nonNegativeAmountEncoded}));

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 /index-values/{shareClassSymbol}
 */
export const getApiIndexValuesShareClassSymbol = async (args: GetApiIndexValuesShareClassSymbolArgs, options?: GetApiIndexValuesShareClassSymbolOptions) => {
const {baseUrl = "https://public-api.spiko.io/v0", fetch: fetchFn = fetch} = options ?? {}

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

if (args.startDay != null) query.append("startDay", String(args.startDay))

const url = `${baseUrl.replace(/\/+$/, '')}/index-values/${encodeURIComponent(String(args.shareClassSymbol))}${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(getApiIndexValuesShareClassSymbolResponse, await res.json())
};