import {z} from 'zod'

export type GetApiV2UserAccountsServerAccountIdInstrumentsInstrumentIdCandlesArgs = {server: 'oanda' | 'oanda-demo' | 'otms' | 'v20' | 'v20-demo' | 'oj' | 'oj-demo' | 'opt' | 'ftmo-1', accountId: string, instrumentId: string, from: string, to: string, granularity: 'M1' | 'M5' | 'M15' | 'H1' | 'H4' | 'D1'};

export type GetApiV2UserAccountsServerAccountIdInstrumentsInstrumentIdCandlesOptions = {baseUrl: string, bearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const getApiV2UserAccountsServerAccountIdInstrumentsInstrumentIdCandlesResponse = z.array(z.object({open: z.number(), close: z.number(), low: z.number(), high: z.number(), time: z.number(), complete: z.boolean(), volume: z.number()}));

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 /v2/user/accounts/{server}/{accountId}/instruments/{instrumentId}/candles
 */
export const getApiV2UserAccountsServerAccountIdInstrumentsInstrumentIdCandles = async (args: GetApiV2UserAccountsServerAccountIdInstrumentsInstrumentIdCandlesArgs, options: GetApiV2UserAccountsServerAccountIdInstrumentsInstrumentIdCandlesOptions) => {
const {baseUrl, fetch: fetchFn = fetch, bearerAuth} = options ?? {}

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

if (args.from != null) query.append("from", String(args.from))
if (args.to != null) query.append("to", String(args.to))
if (args.granularity != null) query.append("granularity", String(args.granularity))
if (bearerAuth !== undefined) headers.set('authorization', `Bearer ${bearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v2/user/accounts/${encodeURIComponent(String(args.server))}/${encodeURIComponent(String(args.accountId))}/instruments/${encodeURIComponent(String(args.instrumentId))}/candles${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(getApiV2UserAccountsServerAccountIdInstrumentsInstrumentIdCandlesResponse, await res.json())
};