import {z} from 'zod'

export type GetApiPublicSwapTokensArgs = {chain?: string | undefined, token?: string | undefined};

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

export const swapToken = z.object({symbol: z.string().optional(), name: z.string().optional(), address: z.string().optional(), chain: z.string().optional(), decimals: z.number().optional(), logo: z.string().optional(), price: z.number().optional(), liquidityUsd: z.number().optional(), tags: z.array(z.string()).optional()});

export const getApiPublicSwapTokensResponse = z.array(swapToken);

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
};

/**
 * Retrieves supported tokens for a specified chain
 * 
 * GET /public/swap/tokens
 */
export const getApiPublicSwapTokens = async (args: GetApiPublicSwapTokensArgs, options?: GetApiPublicSwapTokensOptions) => {
const {baseUrl = "https://api.unstoppabledomains.com/profile", fetch: fetchFn = fetch} = options ?? {}

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

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

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