import {z} from 'zod'

export type FocusLossEvent = {timestamp: string, duration_seconds: number};

export type SubmitAnswerRequest = {answer: string, time_to_respond_seconds?: (number | null) | undefined, focus_loss_events?: (Array<FocusLossEvent> | null) | undefined, paste_detected?: (boolean | null) | undefined};

export type CreateApiApiV1QualificationAnswerArgs = {authorization?: (string | null) | undefined, body: SubmitAnswerRequest};

export type CreateApiApiV1QualificationAnswerOptions = {baseUrl: string, fetch?: typeof fetch | undefined};

export const testResult = z.object({passed: z.boolean(), overall_score: z.number(), dimensions: z.record(z.string(), z.number().int()), extracted_skills: z.array(z.string()), summary: z.string(), concerns: z.string().nullable().optional(), status: z.string().nullable().optional(), test_id: z.string().nullable().optional()});

export const submitAnswerResponse = z.object({next_question: z.string().nullable().optional(), is_complete: z.boolean(), question_number: z.number().int().nullable().optional(), result: testResult.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
};

/**
 * Submit Answer
 * 
 * POST /api/v1/qualification/answer
 */
export const createApiApiV1QualificationAnswer = async (args: CreateApiApiV1QualificationAnswerArgs, options: CreateApiApiV1QualificationAnswerOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

if (args.authorization != null) headers.set("authorization", String(args.authorization))

const url = `${baseUrl.replace(/\/+$/, '')}/api/v1/qualification/answer${query.size > 0 ? `?${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(submitAnswerResponse, await res.json())
};