import {z} from 'zod'

export type GetApiUsersMeSuggestionsPollNameTocompareArgs = {poll_name: string, strategy?: ('classic' | 'watched') | undefined};

export type GetApiUsersMeSuggestionsPollNameTocompareOptions = {baseUrl: string, oauth2?: string | undefined, fetch?: typeof fetch | undefined};

export const typeEnum = z.enum(["video", "candidate_fr_2022"]);

export const relatedEntity = z.object({uid: z.string().max(144), type: typeEnum, metadata: z.record(z.string(), z.unknown())});

export const reasonsEnum = z.enum(["insufficient_trust", "insufficient_tournesol_score", "moderation_by_association", "moderation_by_contributors"]);

export const unsafeStatus = z.object({status: z.boolean(), reasons: z.array(reasonsEnum)});

export const collectiveRating = z.object({n_comparisons: z.number().int(), n_contributors: z.number().int(), tournesol_score: z.number().nullable(), unsafe: unsafeStatus});

export const entityToCompare = z.object({entity: relatedEntity, collective_rating: collectiveRating});

export const getApiUsersMeSuggestionsPollNameTocompareResponse = z.array(entityToCompare);

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
};

/**
 * Suggest a list of entities to compare to the logged-in user.
 * 
 * GET /users/me/suggestions/{poll_name}/tocompare/
 */
export const getApiUsersMeSuggestionsPollNameTocompare = async (args: GetApiUsersMeSuggestionsPollNameTocompareArgs, options: GetApiUsersMeSuggestionsPollNameTocompareOptions) => {
const {baseUrl, fetch: fetchFn = fetch, oauth2} = options ?? {}

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

if (args.strategy != null) query.append("strategy", String(args.strategy))
if (oauth2 !== undefined) headers.set('authorization', `Bearer ${oauth2}`)

const url = `${baseUrl.replace(/\/+$/, '')}/users/me/suggestions/${encodeURIComponent(String(args.poll_name))}/tocompare/${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(getApiUsersMeSuggestionsPollNameTocompareResponse, await res.json())
};