import {z} from 'zod'

export type GetApiV1ContractSymbolChartArgs = {symbol: string, interval: string, bucket: '1min' | '5min' | '10min' | '15min' | '30min' | '1d' | '1w'};

export type GetApiV1ContractSymbolChartOptions = {baseUrl?: string | undefined, bearerApiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const contractChartBar = z.object({timestamp: z.string(), timestampEnd: z.string(), belowBidVolume: z.number().int().gte(0), bidVolume: z.number().int().gte(0), aboveBidVolume: z.number().int().gte(0), midVolume: z.number().int().gte(0), belowAskVolume: z.number().int().gte(0), askVolume: z.number().int().gte(0), aboveAskVolume: z.number().int().gte(0), noSideVolume: z.number().int().gte(0), candleVolume: z.number().int().gte(0), candleVolumeNoMl: z.number().int().gte(0).optional(), candlePremium: z.number(), belowBidPremium: z.number(), bidPremium: z.number(), aboveBidPremium: z.number(), midPremium: z.number(), belowAskPremium: z.number(), askPremium: z.number(), aboveAskPremium: z.number(), noSidePremium: z.number(), dailyVolume: z.number().int().gte(0), dailyPremium: z.number(), vwap: z.number(), iv: z.number().nullable().optional(), avgVolume: z.number().optional(), avgPremium: z.number().optional()});

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

export const contractChartSuccess = z.object({data: z.array(contractChartBar), 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
};

/**
 * Intraday chart bars for a contract
 * 
 * GET /v1/contract/{symbol}/chart
 */
export const getApiV1ContractSymbolChart = async (args: GetApiV1ContractSymbolChartArgs, options?: GetApiV1ContractSymbolChartOptions) => {
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.interval != null) query.append("interval", String(args.interval))
if (args.bucket != null) query.append("bucket", String(args.bucket))
if (bearerApiKey !== undefined) headers.set('authorization', `Bearer ${bearerApiKey}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/contract/${encodeURIComponent(String(args.symbol))}/chart${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(contractChartSuccess, await res.json())
};