import {z} from 'zod'

export type QuizAnswer = {question_index: number, selected_index: number, correct: boolean};

export type SaveReflectionRequest = {body?: (string | null) | undefined, quiz_answers?: (Array<QuizAnswer> | null) | undefined};

export type UpdateApiApiLearningPlansInstancesInstanceIdReflectionsDayIndexArgs = {instance_id: string, day_index: number, 'x-user-id'?: (string | null) | undefined, body: SaveReflectionRequest};

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

export const quizAnswer = z.object({question_index: z.number().int(), selected_index: z.number().int(), correct: z.boolean()});

export const learningPlanReflection = z.object({instance_id: z.string(), day_index: z.number().int(), body: z.string(), quiz_answers: z.array(quizAnswer).optional(), created_at: z.string(), updated_at: z.string()});

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
};

/**
 * Save Reflection
 * 
 * PUT /api/learning-plans/instances/{instance_id}/reflections/{day_index}
 */
export const updateApiApiLearningPlansInstancesInstanceIdReflectionsDayIndex = async (args: UpdateApiApiLearningPlansInstancesInstanceIdReflectionsDayIndexArgs, options: UpdateApiApiLearningPlansInstancesInstanceIdReflectionsDayIndexOptions) => {
const {baseUrl, fetch: fetchFn = fetch, HTTPBearer} = options ?? {}

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

if (args['x-user-id'] != null) headers.set("x-user-id", String(args['x-user-id']))
if (HTTPBearer !== undefined) headers.set('authorization', `Bearer ${HTTPBearer}`)

const url = `${baseUrl.replace(/\/+$/, '')}/api/learning-plans/instances/${encodeURIComponent(String(args.instance_id))}/reflections/${encodeURIComponent(String(args.day_index))}${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "PUT", 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(learningPlanReflection, await res.json())
};