import {z} from 'zod'

export type GetApiGatewayV1EquityEtfHoldingsArgs = {symbol: string, as_of?: string | undefined, asset_class?: ('equity' | 'bond') | undefined, limit?: number | undefined, offset?: number | undefined};

export type GetApiGatewayV1EquityEtfHoldingsOptions = {baseUrl?: string | undefined, AccessToken?: string | undefined, fetch?: typeof fetch | undefined};

export const equityETFHoldingsPeriod = z.object({as_of: z.string(), quarter: z.number().int().gte(1).lte(4), year: z.number().int().gte(1900)});

export const equityETFFund = z.object({as_of: z.string(), asset_class: z.string(), cik: z.string(), filing_date: z.string(), name: z.string(), offset: z.number().int(), returned: z.number().int(), source: z.string(), total_holdings: z.number().int(), total_net_assets: z.number().nullable()});

export const equityETFHolding = z.object({asset_class: z.string().nullable(), cusip: z.string().nullable(), isin: z.string().nullable(), logo_url: z.string().nullable(), market_value: z.number().nullable(), name: z.string().nullable(), shares: z.number().nullable(), ticker: z.string().nullable(), weight: z.number().nullable()});

export const equityETFHoldingsSnapshot = z.object({fund: equityETFFund, holdings: z.array(equityETFHolding).nullable()});

export const equityETFHoldingsResponse = z.object({available_periods: z.array(equityETFHoldingsPeriod).nullable(), snapshots: z.array(equityETFHoldingsSnapshot).nullable(), symbol: z.string()});

export const objectResponseMeta = z.object({cached: z.boolean(), credits_used: z.number().int(), empty_reason: z.string().optional()});

export const dataObjectResponseEquityETFHoldingsResponse = z.object({$schema: z.string().optional(), data: equityETFHoldingsResponse, meta: objectResponseMeta});

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
};

/**
 * ETF Holdings
 * 
 * GET /gateway/v1/equity/etf/holdings
 */
export const getApiGatewayV1EquityEtfHoldings = async (args: GetApiGatewayV1EquityEtfHoldingsArgs, options?: GetApiGatewayV1EquityEtfHoldingsOptions) => {
const {baseUrl = "https://api.asksurf.ai", fetch: fetchFn = fetch, AccessToken} = options ?? {}

const query = new URLSearchParams()
const headers = new Headers()
headers.set('accept', "application/json")

if (args.symbol != null) query.append("symbol", String(args.symbol))
if (args.as_of != null) query.append("as_of", String(args.as_of))
if (args.asset_class != null) query.append("asset_class", String(args.asset_class))
if (args.limit != null) query.append("limit", String(args.limit))
if (args.offset != null) query.append("offset", String(args.offset))
if (AccessToken !== undefined) headers.set('authorization', `Bearer ${AccessToken}`)

const url = `${baseUrl.replace(/\/+$/, '')}/gateway/v1/equity/etf/holdings${query.size > 0 ? `?${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(dataObjectResponseEquityETFHoldingsResponse, await res.json())
};