import {z} from 'zod'

export type GetApiV1SecuritiesTickerInstitutionalHoldersArgs = {ticker: string, reportDate?: string | undefined, limit?: number | undefined, offset?: number | undefined, holderTypes?: string | undefined, styles?: string | undefined};

export type GetApiV1SecuritiesTickerInstitutionalHoldersOptions = {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 topHolderDto = z.object({name: z.string().nullable().optional(), cik: z.string().nullable().optional(), shares: z.number().int().optional(), value: z.number().int().optional(), percentOfTotal: z.number().optional(), listedTicker: z.string().nullable().optional(), positionType: z.string().nullable().optional(), holderType: z.string().nullable().optional(), style: z.string().nullable().optional()});

export const topHoldersMeta = z.object({reportDate: z.string().optional(), isCombinedQuarter: z.boolean().optional(), totalInstitutions: z.number().int().optional(), totalShares: z.number().int().optional(), totalValue: z.number().int().optional(), styleReportDate: z.string().nullable().optional(), matchingRows: z.number().int().nullable().optional(), matchingInstitutions: z.number().int().nullable().optional(), limit: z.number().int().optional(), offset: z.number().int().optional(), count: z.number().int().optional(), hasMore: z.boolean().optional(), total: z.number().int().nullable().optional()});

export const topHoldersResponse = z.object({listingNotice: listingNotice.optional(), data: z.array(topHolderDto).nullable().optional(), meta: topHoldersMeta.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 holders (13F filers) of an exact stock or ETF listing, ranked by reported quantity. A row's
 * quantity is common shares, an option position's notional underlying shares, or a
 * principal amount, so the total is aggregate 13F exposure rather than pure ownership.
 * While the newest quarter's 13F filing window is open, non-ETF primary stocks use the
 * combined view (new filings + prior-quarter carry-forward); ETF listings remain exact and
 * as-filed because carry-forward is filer-wide. Share counts are restated onto today's basis.
 * Each row carries the holder's entity type from regulatory records, never from its name, and its
 * style band measured from its filed 13F book in one quarter for every row.
 * 
 * GET /v1/securities/{ticker}/institutional-holders
 */
export const getApiV1SecuritiesTickerInstitutionalHolders = async (args: GetApiV1SecuritiesTickerInstitutionalHoldersArgs, options?: GetApiV1SecuritiesTickerInstitutionalHoldersOptions) => {
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 (args.offset != null) query.append("offset", String(args.offset))
if (args.holderTypes != null) query.append("holderTypes", String(args.holderTypes))
if (args.styles != null) query.append("styles", String(args.styles))
if (ApiKey !== undefined) headers.set('authorization', `Bearer ${ApiKey}`)

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