import {z} from 'zod'

export type FlexibleCBPortfolio = {CBId?: Array<string> | undefined} | {[key: string]: unknown};

export type Portfolio = {name: string, entities: FlexibleCBPortfolio};

export type PortfolioSummaryRequest = {portfolio: Portfolio, facet_column: string, EffectiveDateId?: number | undefined, rating_change_months?: number | undefined, use_client_scale?: boolean | undefined, use_oci?: boolean | undefined};

export type RequestEnvelopePortfolioSummaryRequest = {Parameters: PortfolioSummaryRequest};

export type CreateApiApiAnalyticsPortfolioSummaryArgs = {body: RequestEnvelopePortfolioSummaryRequest};

export type CreateApiApiAnalyticsPortfolioSummaryOptions = {baseUrl?: string | undefined, BearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const portfolioSummaryResponse = z.object({CBSector: z.array(z.string()), entity_count: z.array(z.number().int()), benchmark_entity_count: z.array(z.number().int()), CCR: z.array(z.string()), CCRPD100Mid: z.array(z.number()), upgrades: z.array(z.number().int()), downgrades: z.array(z.number().int()), rating_change: z.array(z.number().int())});

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
};

/**
 * Portfolio Summary
 * 
 * POST /api/analytics/portfolio-summary
 */
export const createApiApiAnalyticsPortfolioSummary = async (args: CreateApiApiAnalyticsPortfolioSummaryArgs, options?: CreateApiApiAnalyticsPortfolioSummaryOptions) => {
const {baseUrl = "https://api.creditbenchmark.com", fetch: fetchFn = fetch, BearerAuth} = options ?? {}

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

if (BearerAuth !== undefined) headers.set('authorization', `Bearer ${BearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/api/analytics/portfolio-summary${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "POST", headers, body: JSON.stringify(args.body)})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(portfolioSummaryResponse, await res.json())
};