import {z} from 'zod'

export type GetApiV1DarkPoolTopPrintsTickerArgs = {ticker: string, top_n?: number | undefined, lookback_days?: number | undefined, as_of_date?: string | undefined};

export type GetApiV1DarkPoolTopPrintsTickerOptions = {baseUrl?: string | undefined, bearerApiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const darkPoolTopPrint = z.object({timestamp: z.string(), price: z.number(), notional: z.number(), size: z.number().int().gte(0)});

export const meta = z.object({timestamp: z.string(), requestId: z.string()});

export const darkPoolTopPrintsSuccess = z.object({data: z.array(darkPoolTopPrint), meta: meta});

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
};

/**
 * Largest individual dark-pool prints for a ticker
 * 
 * GET /v1/dark-pool/top-prints/{ticker}
 */
export const getApiV1DarkPoolTopPrintsTicker = async (args: GetApiV1DarkPoolTopPrintsTickerArgs, options?: GetApiV1DarkPoolTopPrintsTickerOptions) => {
const {baseUrl = "https://flow-api.skylit.ai", fetch: fetchFn = fetch, bearerApiKey} = options ?? {}

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

if (args.top_n != null) query.append("top_n", String(args.top_n))
if (args.lookback_days != null) query.append("lookback_days", String(args.lookback_days))
if (args.as_of_date != null) query.append("as_of_date", String(args.as_of_date))
if (bearerApiKey !== undefined) headers.set('authorization', `Bearer ${bearerApiKey}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/dark-pool/top-prints/${encodeURIComponent(String(args.ticker))}${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(darkPoolTopPrintsSuccess, await res.json())
};