import {z} from 'zod'

export type GetApiFollowsArgs = {user_link?: string | undefined, username?: string | undefined, user_id?: string | undefined, next_cursor?: number | undefined};

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

export const commonUser = z.object({bio_urls: z.array(z.string()).optional(), can_dm: z.boolean().optional(), created_at: z.string().optional(), description: z.string().optional(), display_name: z.string().optional(), favourites_count: z.number().int().optional(), followers_count: z.number().int().optional(), followings_count: z.number().int().optional(), id: z.string().optional(), location: z.string().optional(), media_count: z.number().int().optional(), pinned_tweet_ids: z.array(z.string()).optional(), possibly_sensitive: z.boolean().optional(), profile_background_image_url: z.string().optional(), profile_image_url: z.string().optional(), protected: z.boolean().optional(), tweets_count: z.number().int().optional(), username: z.string().optional(), verified: z.boolean().optional()});

export const commonUsersResponse = z.object({next_cursor: z.string().optional(), users: z.array(commonUser).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
};

/**
 * Following
 * 
 * GET /follows
 */
export const getApiFollows = async (args: GetApiFollowsArgs, options?: GetApiFollowsOptions) => {
const {baseUrl = "https://api.sorsa.io/v3", fetch: fetchFn = fetch, ApiKeyAuth} = options ?? {}

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

if (args.user_link != null) query.append("user_link", String(args.user_link))
if (args.username != null) query.append("username", String(args.username))
if (args.user_id != null) query.append("user_id", String(args.user_id))
if (args.next_cursor != null) query.append("next_cursor", String(args.next_cursor))
if (ApiKeyAuth !== undefined) headers.set("ApiKey", ApiKeyAuth)

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