import {z} from 'zod'

export type GetApiTradingMarketdataArgs = {symbol: string, accountId?: string | undefined, subaccountId?: string | undefined, sizeBuckets?: Array<string> | undefined, amountBuckets?: Array<string> | undefined, depth?: number | undefined, priceIncrement?: string | undefined};

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

export const priceLevel = z.object({amount: z.string().optional(), price: z.string(), size: z.string().optional()});

export const marketDataSnapshot = z.object({amountBuckets: z.array(z.string()).optional(), bids: z.array(priceLevel), offers: z.array(priceLevel), sizeBuckets: z.array(z.string()).optional(), spread: z.string().optional(), status: z.string().optional(), symbol: z.string(), timestamp: z.string()});

export const marketDataResponse = z.object({data: z.array(marketDataSnapshot)});

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 market data snapshot
 * 
 * GET /trading/marketdata
 */
export const getApiTradingMarketdata = async (args: GetApiTradingMarketdataArgs, options?: GetApiTradingMarketdataOptions) => {
const {baseUrl = "https://api.anchorage-staging.com/v2", fetch: fetchFn = fetch, ApiAccessKey} = options ?? {}

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

if (args.symbol != null) query.append("symbol", String(args.symbol))
if (args.accountId != null) query.append("accountId", String(args.accountId))
if (args.subaccountId != null) query.append("subaccountId", String(args.subaccountId))
if (args.sizeBuckets != null) query.append("sizeBuckets", args.sizeBuckets.join(','))
if (args.amountBuckets != null) query.append("amountBuckets", args.amountBuckets.join(','))
if (args.depth != null) query.append("depth", String(args.depth))
if (args.priceIncrement != null) query.append("priceIncrement", String(args.priceIncrement))
if (ApiAccessKey !== undefined) headers.set("Api-Access-Key", ApiAccessKey)

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