import {z} from 'zod'

export type GetApiV1CftcPositionsLatestArgs = {category?: string | undefined};

export type GetApiV1CftcPositionsLatestOptions = {baseUrl?: string | undefined, ApiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const listingNotice = z.object({status: z.string().nullable().optional(), ticker: z.string().nullable().optional(), delistedOn: z.string().nullable().optional(), successorTicker: z.string().nullable().optional()});

export const cftcLatestPositionDto = z.object({marketCode: z.string().nullable().optional(), marketName: z.string().nullable().optional(), category: z.string().nullable().optional(), reportDate: z.string().nullable().optional(), openInterest: z.number().int().nullable().optional(), commNet: z.number().int().nullable().optional(), nonCommNet: z.number().int().nullable().optional()});

export const cftcLatestPositionDtoListResponse = z.object({listingNotice: listingNotice.optional(), data: z.array(cftcLatestPositionDto).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
};

/**
 * Latest COT positioning snapshot across all tracked futures contracts, sorted by category then market name. Net positions are long minus short; report fields are null for contracts without stored reports yet.
 * 
 * GET /v1/cftc/positions/latest
 */
export const getApiV1CftcPositionsLatest = async (args: GetApiV1CftcPositionsLatestArgs, options?: GetApiV1CftcPositionsLatestOptions) => {
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.category != null) query.append("category", String(args.category))
if (ApiKey !== undefined) headers.set('authorization', `Bearer ${ApiKey}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/cftc/positions/latest${query.size > 0 ? `?${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(cftcLatestPositionDtoListResponse, await res.json())
};