import {z} from 'zod'

export type GetApiV1StocksTickerInstitutionalActivityArgs = {ticker: string, reportDate?: string | undefined, limit?: number | undefined};

export type GetApiV1StocksTickerInstitutionalActivityOptions = {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 continuedFilerDto = z.object({name: z.string().nullable().optional(), cik: z.string().nullable().optional()});

export const holderActivityDto = z.object({name: z.string().nullable().optional(), cik: z.string().nullable().optional(), previousShares: z.number().int().optional(), currentShares: z.number().int().optional(), deltaShares: z.number().int().optional(), deltaValue: z.number().int().optional(), isNewPosition: z.boolean().optional(), isSoldOut: z.boolean().optional(), isFirst13F: z.boolean().nullable().optional(), continuesFrom: z.array(continuedFilerDto).nullable().optional()});

export const holdingsActivityResponse = z.object({listingNotice: listingNotice.optional(), reportDate: z.string().optional(), previousReportDate: z.string().nullable().optional(), isFilingWindowOpen: z.boolean().optional(), buyers: z.array(holderActivityDto).nullable().optional(), sellers: z.array(holderActivityDto).nullable().optional(), limit: z.number().int().nullable().optional(), totalBuyers: z.number().int().nullable().optional(), totalSellers: z.number().int().nullable().optional(), note: z.string().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
};

/**
 * Top institutional buyers and sellers of an exact stock or ETF listing — biggest absolute share additions
 * and reductions versus the previous 13F report date, including new and sold-out
 * positions. Movement is like-for-like: only filers with an observed 13F in both quarters
 * rank, so a fund that has not filed yet, a first filer or a fund that stopped filing under
 * its CIK is never read as a trade, and note names the largest filers left out. A filer
 * that continues under one new CIK is compared through it (continuesFrom); one split across
 * several new CIKs is left out. Movement needs the immediately preceding quarter on record;
 * otherwise note says the comparison is unavailable. Share counts are restated onto today's
 * split basis.
 * 
 * GET /v1/stocks/{ticker}/institutional-activity
 */
export const getApiV1StocksTickerInstitutionalActivity = async (args: GetApiV1StocksTickerInstitutionalActivityArgs, options?: GetApiV1StocksTickerInstitutionalActivityOptions) => {
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.reportDate != null) query.append("reportDate", String(args.reportDate))
if (args.limit != null) query.append("limit", String(args.limit))
if (ApiKey !== undefined) headers.set('authorization', `Bearer ${ApiKey}`)

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