import {z} from 'zod'

export type GetApiV2RolePlayGetFeedbackArgs = {Authorization: string, location: string, role: string, text: string};

export type GetApiV2RolePlayGetFeedbackOptions = {baseUrl: string, fetch?: typeof fetch | undefined};

export const getApiV2RolePlayGetFeedbackResponse = z.object({code: z.number().int().optional(), data: z.object({display_score: z.string().optional(), grammar_mistakes: z.array(z.string()).optional(), improved_version: z.string().optional(), raw_msgs: z.array(z.string()).optional(), score: z.string().optional(), scoring: z.string().optional(), vocabulary_mistakes: z.array(z.string()).optional()}).optional(), message: 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
};

/**
 * analyze user's reply
 * 
 * GET /v2/role_play/get_feedback
 */
export const getApiV2RolePlayGetFeedback = async (args: GetApiV2RolePlayGetFeedbackArgs, options: GetApiV2RolePlayGetFeedbackOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

if (args.Authorization != null) headers.set("Authorization", String(args.Authorization))
if (args.location != null) query.append("location", String(args.location))
if (args.role != null) query.append("role", String(args.role))
if (args.text != null) query.append("text", String(args.text))

const url = `${baseUrl.replace(/\/+$/, '')}/v2/role_play/get_feedback${query.size > 0 ? `?${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(getApiV2RolePlayGetFeedbackResponse, await res.json())
};