import {z} from 'zod'

export type Venue = 'kalshi' | 'polymarket';

export type GetApiMarketsTickerArgs = {ticker: string, venue?: Venue | undefined};

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

export const venue = z.enum(["kalshi", "polymarket"]);

export const market = z.object({ticker: z.string().optional(), event_ticker: z.string().optional(), series_ticker: z.string().optional(), title: z.string().optional(), subtitle: z.string().nullable().optional(), yes_sub_title: z.string().nullable().optional(), no_sub_title: z.string().nullable().optional(), bet_group: z.string().nullable().optional(), category: z.string().optional(), subcategory: z.string().nullable().optional(), frequency: z.string().nullable().optional(), venue: venue.optional(), status: z.string().optional(), yes_bid: z.number().optional(), yes_ask: z.number().optional(), no_bid: z.number().optional(), no_ask: z.number().optional(), last_price: z.number().optional(), price_to_beat: z.number().nullable().optional(), volume: z.number().int().optional(), volume_24h: z.number().int().optional(), open_interest: z.number().int().optional(), venue_url: z.string().nullable().optional(), open_time: z.string().optional(), close_time: z.string().optional(), expiration_time: z.string().optional(), exclusion_keys: z.array(z.string()).optional()});

export const getApiMarketsTickerResponse = z.object({data: market.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 Market
 * 
 * GET /markets/{ticker}
 */
export const getApiMarketsTicker = async (args: GetApiMarketsTickerArgs, options?: GetApiMarketsTickerOptions) => {
const {baseUrl = "https://api.totalis.trade", fetch: fetchFn = fetch} = options ?? {}

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

if (args.venue != null) query.append("venue", String(args.venue))

const url = `${baseUrl.replace(/\/+$/, '')}/markets/${encodeURIComponent(String(args.ticker))}${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(getApiMarketsTickerResponse, await res.json())
};