import {z} from 'zod'

export type AIReviewRequest = {category_path: Array<string>, skip_to_review?: boolean | undefined, skip_with_change_request?: boolean | undefined};

export type CreateApiCalculExercisesAiReviewExecuteArgs = {body: AIReviewRequest};

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

export const variationChange = z.object({index: z.number().int(), new_content: z.string().nullable().optional(), new_solution: z.string().nullable().optional()});

export const proposedChanges = z.object({title: z.string().nullable().optional(), variations: z.array(variationChange).optional()});

export const aIReviewResultItem = z.object({template_id: z.string(), title: z.string(), action: z.enum(["none", "change_request", "to_review"]), reason: z.string().nullable().optional(), proposed_changes: proposedChanges.nullable().optional(), error: z.string().nullable().optional()});

export const aIReviewResponse = z.object({success: z.number().int(), failed: z.number().int(), skipped: z.number().int(), no_change: z.number().int(), change_requests: z.number().int(), marked_to_review: z.number().int(), results: z.array(aIReviewResultItem)});

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
};

/**
 * Execute Ai Review
 * 
 * POST /calcul-exercises/ai-review/execute
 */
export const createApiCalculExercisesAiReviewExecute = async (args: CreateApiCalculExercisesAiReviewExecuteArgs, options: CreateApiCalculExercisesAiReviewExecuteOptions) => {
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 = `${baseUrl.replace(/\/+$/, '')}/calcul-exercises/ai-review/execute${query.size > 0 ? `?${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(aIReviewResponse, await res.json())
};