import {z} from 'zod'

export type GetApiV1DistributionStatsHitShareArgs = {domain_names: Array<string>, start_date?: (number | null) | undefined, end_date?: (number | null) | undefined, is_publisher?: boolean | undefined};

export type GetApiV1DistributionStatsHitShareOptions = {baseUrl?: string | undefined, APIKey?: string | undefined, fetch?: typeof fetch | undefined};

export const hitShareItem = z.object({domain: z.string(), hit_share: z.number()});

export const hitSharePoolTotals = z.object({surfaces: z.number().int(), citations: z.number().int(), full_text: z.number().int(), grounded: z.number().int()});

export const hitShareResponse = z.object({data: z.array(hitShareItem), total_share: z.number(), pool_totals: hitSharePoolTotals.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
};

/**
 * Get the hit share for a list of domains in a time period
 * 
 * GET /v1/distribution/stats/hit_share
 */
export const getApiV1DistributionStatsHitShare = async (args: GetApiV1DistributionStatsHitShareArgs, options?: GetApiV1DistributionStatsHitShareOptions) => {
const {baseUrl = "https://api.asknews.app", fetch: fetchFn = fetch, APIKey} = options ?? {}

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

for (const item of args.domain_names ?? []) query.append("domain_names", String(item))
if (args.start_date != null) query.append("start_date", String(args.start_date))
if (args.end_date != null) query.append("end_date", String(args.end_date))
if (args.is_publisher != null) query.append("is_publisher", String(args.is_publisher))
if (APIKey !== undefined) headers.set("Authorization", APIKey)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/distribution/stats/hit_share${query.size > 0 ? `?${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(hitShareResponse, await res.json())
};