import {z} from 'zod'

export type GetApiMarketsCandlesticksArgs = {market_tickers: string, start_ts: number, end_ts: number, period_interval: number, include_latest_before_start?: boolean | undefined};

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

export const fixedPointDollars = z.string();

export const bidAskDistribution = z.object({open_dollars: fixedPointDollars, low_dollars: fixedPointDollars, high_dollars: fixedPointDollars, close_dollars: fixedPointDollars});

export const priceDistribution = z.object({open_dollars: fixedPointDollars.optional(), low_dollars: fixedPointDollars.optional(), high_dollars: fixedPointDollars.optional(), close_dollars: fixedPointDollars.optional(), mean_dollars: fixedPointDollars.optional(), previous_dollars: fixedPointDollars.optional(), min_dollars: fixedPointDollars.optional(), max_dollars: fixedPointDollars.optional()});

export const fixedPointCount = z.string();

export const marketCandlestick = z.object({end_period_ts: z.number().int(), yes_bid: bidAskDistribution, yes_ask: bidAskDistribution, price: priceDistribution, volume_fp: fixedPointCount, open_interest_fp: fixedPointCount});

export const marketCandlesticksResponse = z.object({market_ticker: z.string(), candlesticks: z.array(marketCandlestick)});

export const batchGetMarketCandlesticksResponse = z.object({markets: z.array(marketCandlesticksResponse)});

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
};

/**
 * Batch Get Market Candlesticks
 * 
 * GET /markets/candlesticks
 */
export const getApiMarketsCandlesticks = async (args: GetApiMarketsCandlesticksArgs, options?: GetApiMarketsCandlesticksOptions) => {
const {baseUrl = "https://external-api.kalshi.com/trade-api/v2", fetch: fetchFn = fetch} = options ?? {}

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

if (args.market_tickers != null) query.append("market_tickers", String(args.market_tickers))
if (args.start_ts != null) query.append("start_ts", String(args.start_ts))
if (args.end_ts != null) query.append("end_ts", String(args.end_ts))
if (args.period_interval != null) query.append("period_interval", String(args.period_interval))
if (args.include_latest_before_start != null) query.append("include_latest_before_start", String(args.include_latest_before_start))

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