import {z} from 'zod'

export type GetApiTwitterUserFollowingsArgs = {userName: unknown, cursor?: unknown | undefined, pageSize?: number | undefined};

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

export const userProfileSnake = z.object({id: z.string().optional(), name: z.string().optional(), screen_name: z.string().optional(), userName: z.string().optional(), username: z.string().nullable().optional(), location: z.string().optional(), url: z.string().nullable().optional(), description: z.string().optional(), email: z.string().nullable().optional(), protected: z.boolean().optional(), verified: z.boolean().optional(), isBlueVerified: z.boolean().optional(), followers_count: z.number().int().optional(), following_count: z.number().int().optional(), friends_count: z.number().int().optional(), favourites_count: z.number().int().optional(), statuses_count: z.number().int().optional(), media_tweets_count: z.number().int().optional(), created_at: z.string().optional(), profile_banner_url: z.string().optional(), profile_image_url_https: z.string().optional(), can_dm: z.boolean().optional()});

export const getApiTwitterUserFollowingsResponse = z.object({followings: z.array(userProfileSnake).optional(), has_next_page: z.boolean().optional(), next_cursor: z.string().optional(), status: z.enum(["success", "error"]).optional(), msg: z.string().optional(), code: z.number().int().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
};

/**
 * Get user followings (with full profile metadata). Sorted by follow date — most recent followings appear on the first page. Use `cursor` for pagination.
 * 
 * GET /twitter/user/followings
 */
export const getApiTwitterUserFollowings = async (args: GetApiTwitterUserFollowingsArgs, options?: GetApiTwitterUserFollowingsOptions) => {
const {baseUrl = "https://api.twitterapi.io", fetch: fetchFn = fetch, ApiKeyAuth} = options ?? {}

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

if (args.userName != null) query.append("userName", String(args.userName))
if (args.cursor != null) query.append("cursor", String(args.cursor))
if (args.pageSize != null) query.append("pageSize", String(args.pageSize))
if (ApiKeyAuth !== undefined) headers.set("X-API-Key", ApiKeyAuth)

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