import {z} from 'zod'

export type GetApiV1InstitutionsCikActivityArgs = {cik: string, reportDate?: string | undefined, bucket?: string | undefined, limit?: number | undefined};

export type GetApiV1InstitutionsCikActivityOptions = {baseUrl?: string | undefined, ApiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const institutionActivityPositionDto = z.object({ticker: z.string().nullable().optional(), company: z.string().nullable().optional(), positionType: z.string().nullable().optional(), previousShares: z.number().int().optional(), currentShares: z.number().int().optional(), deltaShares: z.number().int().optional(), deltaValue: z.number().int().optional()});

export const institutionActivityResponse = z.object({name: z.string().nullable().optional(), cik: z.string().nullable().optional(), reportDate: z.string().optional(), previousReportDate: z.string().optional(), initiated: z.array(institutionActivityPositionDto).nullable().optional(), increased: z.array(institutionActivityPositionDto).nullable().optional(), reduced: z.array(institutionActivityPositionDto).nullable().optional(), exited: z.array(institutionActivityPositionDto).nullable().optional(), limit: z.number().int().nullable().optional(), initiatedTotal: z.number().int().nullable().optional(), increasedTotal: z.number().int().nullable().optional(), reducedTotal: z.number().int().nullable().optional(), exitedTotal: z.number().int().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
};

/**
 * An institution's quarterly position-change activity — initiated / increased /
 * reduced / exited stocks diffed against the immediately prior quarter, each bucket
 * sorted by absolute Δ value descending. Share counts are restated onto today's split
 * basis before bucketing so a split does not surface as a phantom move.
 * 
 * GET /v1/institutions/{cik}/activity
 */
export const getApiV1InstitutionsCikActivity = async (args: GetApiV1InstitutionsCikActivityArgs, options?: GetApiV1InstitutionsCikActivityOptions) => {
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.bucket != null) query.append("bucket", String(args.bucket))
if (args.limit != null) query.append("limit", String(args.limit))
if (ApiKey !== undefined) headers.set('authorization', `Bearer ${ApiKey}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/institutions/${encodeURIComponent(String(args.cik))}/activity${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(institutionActivityResponse, await res.json())
};