import {z} from 'zod'

export type College = string | null;

export type LeagueID = string;

export type OverallPick = string | null;

export type RoundNum = string | null;

export type RoundPick = string | null;

export type Season = string;

export type TeamID = string;

export type TopX = string;

export type GetApiDraftboardArgs = {College?: College | undefined, LeagueID: LeagueID, OverallPick?: OverallPick | undefined, RoundNum?: RoundNum | undefined, RoundPick?: RoundPick | undefined, Season: Season, TeamID?: TeamID | undefined, TopX: TopX};

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

export const getApiDraftboardResponse = z.object({parameters: z.object({College: z.literal("$request.query.College").optional(), LeagueID: z.literal("$request.query.LeagueID").optional(), OverallPick: z.literal("$request.query.OverallPick").optional(), RoundNum: z.literal("$request.query.RoundNum").optional(), RoundPick: z.literal("$request.query.RoundPick").optional(), Season: z.literal("$request.query.Season").optional(), TeamID: z.literal("$request.query.TeamID").optional(), TopX: z.literal("$request.query.TopX").optional()}).optional(), resource: z.literal("draftboard").optional(), resultSets: z.array(z.unknown()).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
};

/**
 * DraftBoard
 * 
 * GET /draftboard
 */
export const getApiDraftboard = async (args: GetApiDraftboardArgs, options?: GetApiDraftboardOptions) => {
const {baseUrl = "https://stats.nba.com/stats", fetch: fetchFn = fetch} = options ?? {}

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

if (args.College != null) query.append("College", String(args.College))
if (args.LeagueID != null) query.append("LeagueID", String(args.LeagueID))
if (args.OverallPick != null) query.append("OverallPick", String(args.OverallPick))
if (args.RoundNum != null) query.append("RoundNum", String(args.RoundNum))
if (args.RoundPick != null) query.append("RoundPick", String(args.RoundPick))
if (args.Season != null) query.append("Season", String(args.Season))
if (args.TeamID != null) query.append("TeamID", String(args.TeamID))
if (args.TopX != null) query.append("TopX", String(args.TopX))

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