import {z} from 'zod'

export type GetApiV2LessonsIdArgs = {id: string};

export type GetApiV2LessonsIdOptions = {baseUrl: string, JWTAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const ratingConfig = z.object({rating_question: z.string().nullable().optional(), additional_feedback_question: z.string().nullable().optional(), include_additional_feedback: z.boolean().nullable().optional(), rating_scale_low_label: z.string().nullable().optional(), rating_scale_high_label: z.string().nullable().optional(), rating_scale: z.union([z.literal(5), z.literal(10)]).nullable().optional()});

export const flashcardCard = z.object({id: z.string().nullable().optional(), term: z.string().max(50), definition: z.string().max(350)});

export const flashcardConfig = z.object({id: z.string().nullable().optional(), header: z.string().max(200).optional(), subheader: z.string().max(1000).optional(), cards: z.array(flashcardCard).optional()});

export const contentItemResource = z.object({id: z.string(), type: z.string(), header: z.string().optional(), content_html: z.string().nullable().optional(), asset_id: z.string().nullable().optional(), quiz_id: z.string().nullable().optional(), rating: ratingConfig.nullable().optional(), flashcard: flashcardConfig.nullable().optional()});

export const lessonDetailAttributes = z.object({title: z.string(), type: z.string(), order: z.number().int(), course_id: z.string(), description_html: z.string().optional(), content_html: z.string().nullable().optional(), quiz_id: z.string().nullable().optional(), web_package_id: z.string().nullable().optional(), height_px: z.number().int().nullable().optional(), width_px: z.number().int().nullable().optional(), external_id: z.string(), created_at: z.string(), modified_at: z.string(), content_items: z.array(contentItemResource).nullable().optional()});

export const lessonDetailResource = z.object({type: z.literal("lessons").optional(), id: z.string(), attributes: lessonDetailAttributes, relationships: z.record(z.string(), z.unknown()).nullable().optional(), links: z.record(z.string(), z.unknown()).nullable().optional()});

export const lessonDetailResponse = z.object({data: lessonDetailResource});

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 lesson
 * 
 * GET /v2/lessons/{id}
 */
export const getApiV2LessonsId = async (args: GetApiV2LessonsIdArgs, options: GetApiV2LessonsIdOptions) => {
const {baseUrl, fetch: fetchFn = fetch, JWTAuth} = options ?? {}

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

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

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