import {z} from 'zod'

export type GetApiV2SurveysIdResponsesArgs = {id: number, select?: number | undefined, skip?: number | undefined};

export type GetApiV2SurveysIdResponsesOptions = {baseUrl?: string | undefined, fetch?: typeof fetch | undefined};

export const apiSurveyGivenAnswer = z.object({fieldId: z.number().int().optional(), subFieldId: z.number().int().nullable().optional(), value: z.unknown()});

export const apiSurveyResponse = z.object({id: z.number().int().optional(), email: z.string().nullable().optional(), started: z.boolean().optional(), dateStarted: z.string().nullable().optional(), complete: z.boolean().optional(), dateCompleted: z.string().nullable().optional(), givenAnswers: z.array(apiSurveyGivenAnswer).nullable().optional()});

export const getApiV2SurveysIdResponsesResponse = z.array(apiSurveyResponse);

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
};

/**
 * Gets a list of all responses for a given survey.
 * 
 * GET /v2/surveys/{id}/responses
 */
export const getApiV2SurveysIdResponses = async (args: GetApiV2SurveysIdResponsesArgs, options?: GetApiV2SurveysIdResponsesOptions) => {
const {baseUrl = "https://api.dotdigital.com", fetch: fetchFn = fetch} = options ?? {}

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

if (args.select != null) query.append("select", String(args.select))
if (args.skip != null) query.append("skip", String(args.skip))

const url = `${baseUrl.replace(/\/+$/, '')}/v2/surveys/${encodeURIComponent(String(args.id))}/responses${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(getApiV2SurveysIdResponsesResponse, await res.json())
};