import {z} from 'zod'

export type GetApiV1ElectionsSummaryArgs = {state?: string | undefined, district?: string | undefined, cycle: number, office: 'house' | 'senate' | 'president', election_full?: boolean | undefined, api_key?: string | undefined};

export type GetApiV1ElectionsSummaryOptions = {baseUrl: string, ApiKeyHeaderAuth?: string | undefined, ApiKeyQueryAuth?: string | undefined, apiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const electionSummary = z.object({count: z.number().int().optional(), disbursements: z.number().optional(), independent_expenditures: z.number().optional(), receipts: z.number().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 /v1/elections/summary/
 */
export const getApiV1ElectionsSummary = async (args: GetApiV1ElectionsSummaryArgs, options: GetApiV1ElectionsSummaryOptions) => {
const {baseUrl, fetch: fetchFn = fetch, ApiKeyHeaderAuth, ApiKeyQueryAuth, apiKey} = options ?? {}

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

if (args.state != null) query.append("state", String(args.state))
if (args.district != null) query.append("district", String(args.district))
if (args.cycle != null) query.append("cycle", String(args.cycle))
if (args.office != null) query.append("office", String(args.office))
if (args.election_full != null) query.append("election_full", String(args.election_full))
if (args.api_key != null) query.append("api_key", String(args.api_key))
if (ApiKeyHeaderAuth !== undefined) headers.set("X-Api-Key", ApiKeyHeaderAuth)
if (ApiKeyQueryAuth !== undefined) query.set("api_key", ApiKeyQueryAuth)
if (apiKey !== undefined) query.set("api_key", apiKey)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/elections/summary/${query.size > 0 ? `?${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(electionSummary, await res.json())
};