import {z} from 'zod'

export type GetApiV1StocksTickerOptionsTermStructureArgs = {ticker: string, maxExpirations?: number | undefined};

export type GetApiV1StocksTickerOptionsTermStructureOptions = {baseUrl?: string | undefined, ApiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const optionTermStructureRowDto = z.object({expiration: z.string().optional(), daysToExpiration: z.number().int().optional(), available: z.boolean().optional(), atmImpliedVolatility: z.number().nullable().optional(), expectedMove: z.number().nullable().optional(), expectedMovePercentOfClose: z.number().nullable().optional(), putCallOpenInterestRatio: z.number().nullable().optional(), putCallVolumeRatio: z.number().nullable().optional(), volumeSession: z.string().nullable().optional(), maxPainStrike: z.number().nullable().optional()});

export const optionTermStructureResponse = z.object({ticker: z.string().nullable().optional(), companyName: z.string().nullable().optional(), underlyingClose: z.number().nullable().optional(), underlyingCloseDate: z.string().nullable().optional(), truncated: z.boolean().optional(), delayed: z.boolean().optional(), expirations: z.array(optionTermStructureRowDto).nullable().optional()});

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
};

/**
 * The nearest upcoming expirations side by side, ascending: at-the-money implied volatility, the at-the-money straddle's mid as a market-implied expected move, put/call ratios and max pain for each. An expiration that could not be read stays in the list with `available: false`. Nothing here is a forecast. Pro reads real-time quotes and Plus delayed indicative quotes; the Free plan covers end-of-day data only and receives 403. US listings only.
 * 
 * GET /v1/stocks/{ticker}/options/term-structure
 */
export const getApiV1StocksTickerOptionsTermStructure = async (args: GetApiV1StocksTickerOptionsTermStructureArgs, options?: GetApiV1StocksTickerOptionsTermStructureOptions) => {
const {baseUrl = "https://api.equibles.com", fetch: fetchFn = fetch, ApiKey} = options ?? {}

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

if (args.maxExpirations != null) query.append("maxExpirations", String(args.maxExpirations))
if (ApiKey !== undefined) headers.set('authorization', `Bearer ${ApiKey}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/stocks/${encodeURIComponent(String(args.ticker))}/options/term-structure${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(optionTermStructureResponse, await res.json())
};