import {z} from 'zod'

export type CreateFlashcardRequest = {front: string, back: string, revision_type?: ('unit' | 'course_global' | null) | undefined};

export type CreateApiTeacherCoursesCourseIdFlashcardsArgs = {course_id: string, body: CreateFlashcardRequest};

export type CreateApiTeacherCoursesCourseIdFlashcardsOptions = {baseUrl: string, OAuth2PasswordBearer?: string | undefined, fetch?: typeof fetch | undefined};

export const flashcard = z.object({_id: z.string().optional(), course_id: z.string(), unit_id: z.string().nullable().optional(), user_id: z.string(), front: z.string(), back: z.string(), revision_type: z.enum(["unit", "course_global"]).nullable().optional(), anchor_unit_id: z.string().nullable().optional(), anchor_block_id: z.string().nullable().optional(), anchored_at: z.string().nullable().optional(), created_at: z.string().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
};

/**
 * Create Flashcard
 * 
 * POST /teacher/courses/{course_id}/flashcards
 */
export const createApiTeacherCoursesCourseIdFlashcards = async (args: CreateApiTeacherCoursesCourseIdFlashcardsArgs, options: CreateApiTeacherCoursesCourseIdFlashcardsOptions) => {
const {baseUrl, fetch: fetchFn = fetch, OAuth2PasswordBearer} = options ?? {}

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

if (OAuth2PasswordBearer !== undefined) headers.set('authorization', `Bearer ${OAuth2PasswordBearer}`)

const url = `${baseUrl.replace(/\/+$/, '')}/teacher/courses/${encodeURIComponent(String(args.course_id))}/flashcards${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(flashcard, await res.json())
};