import {z} from 'zod'

export type GetApiV1SecuritiesTickerInstitutionalOwnershipArgs = {ticker: string, periods?: number | undefined};

export type GetApiV1SecuritiesTickerInstitutionalOwnershipOptions = {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 ownershipPeriodDto = z.object({reportDate: z.string().optional(), institutions: z.number().int().optional(), totalShares: z.number().int().optional(), totalValue: z.number().int().optional(), changePercent: z.number().nullable().optional(), isCombinedQuarter: z.boolean().optional()});

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

/**
 * Aggregate reported 13F exposure history for an exact stock or ETF listing across quarterly report dates,
 * oldest first. The legacy totalShares field sums common-share, put/call
 * notional-underlying, and any tracked principal-denominated rows, so it is not pure
 * share ownership. Non-ETF primary stocks use the combined view while the newest quarter's
 * filing window is open; ETF listings remain exact and as-filed because carry-forward is
 * filer-wide. Share totals are restated onto today's split basis before the change.
 * 
 * GET /v1/securities/{ticker}/institutional-ownership
 */
export const getApiV1SecuritiesTickerInstitutionalOwnership = async (args: GetApiV1SecuritiesTickerInstitutionalOwnershipArgs, options?: GetApiV1SecuritiesTickerInstitutionalOwnershipOptions) => {
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.periods != null) query.append("periods", String(args.periods))
if (ApiKey !== undefined) headers.set('authorization', `Bearer ${ApiKey}`)

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