import {z} from 'zod'

export type GetApiV1StocksTickerGuidanceArgs = {ticker: string};

export type GetApiV1StocksTickerGuidanceOptions = {baseUrl?: string | undefined, ApiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const guidanceItemDto = z.object({filedDate: z.string().optional(), form: z.string().nullable().optional(), filingUrl: z.string().nullable().optional(), metric: z.string().nullable().optional(), metricKind: z.string().nullable().optional(), period: z.string().nullable().optional(), fiscalYear: z.number().int().nullable().optional(), fiscalQuarter: z.number().int().nullable().optional(), low: z.number().nullable().optional(), high: z.number().nullable().optional(), midpoint: z.number().nullable().optional(), unit: z.string().nullable().optional(), basis: z.string().nullable().optional(), fromTable: z.boolean().optional(), quote: z.string().nullable().optional(), periodEnded: z.boolean().nullable().optional(), actual: z.number().nullable().optional(), actualVerdict: z.string().nullable().optional(), actualIsDerived: z.boolean().optional(), priorActual: z.number().nullable().optional(), priorActualIsAnnual: z.boolean().optional(), midpointVsPriorPercent: z.number().nullable().optional(), changeVsPrior: z.string().nullable().optional()});

export const guidanceCoverageDto = z.object({documentsExamined: z.number().int().optional(), coverageStartDate: z.string().nullable().optional(), coverageEndDate: z.string().nullable().optional(), stalenessNote: z.string().nullable().optional()});

export const guidanceResponse = z.object({ticker: z.string().nullable().optional(), companyName: z.string().nullable().optional(), data: z.array(guidanceItemDto).nullable().optional(), coverage: guidanceCoverageDto.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
};

/**
 * A company's earnings guidance from its Item-2.02 8-K releases and earnings-call transcripts — each guided metric with its range, unit, GAAP/non-GAAP basis, period, the verbatim disclosure, and as-announced provenance, newest release first. Revenue and diluted-EPS guidance also carries the reported actual and an above/within/below verdict once the facts land.
 * 
 * GET /v1/stocks/{ticker}/guidance
 */
export const getApiV1StocksTickerGuidance = async (args: GetApiV1StocksTickerGuidanceArgs, options?: GetApiV1StocksTickerGuidanceOptions) => {
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 (ApiKey !== undefined) headers.set('authorization', `Bearer ${ApiKey}`)

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