import {z} from 'zod'

export type GetApiSearchCurrenciesArgs = {'X-API-KEY': string, q: string, chain_ids?: string | undefined, limit?: number | undefined};

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

export const chainID = z.union([z.literal(1), z.literal(10), z.literal(56), z.literal(137), z.literal(4663), z.literal(8453), z.literal(42161), z.literal(20000000000001), z.literal(20000000000002), z.literal(30000000000001), z.literal(30000000000002)]);

export const currency = z.object({id: z.string(), chain_id: chainID, address: z.string().nullable().optional(), symbol: z.string(), name: z.string().optional(), decimals: z.number().int(), image_uri: z.string().nullable().optional(), chain_image_uri: z.string().nullable().optional(), price_usd: z.number().nullable().optional()});

export const currencySearchResponse = z.object({currencies: z.array(currency)});

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
};

/**
 * Currency Search (Typeahead)
 * 
 * GET /search/currencies
 */
export const getApiSearchCurrencies = async (args: GetApiSearchCurrenciesArgs, options?: GetApiSearchCurrenciesOptions) => {
const {baseUrl = "https://api.coinvoyage.io/v3", fetch: fetchFn = fetch, APIKeyHeader} = options ?? {}

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

if (args['X-API-KEY'] != null) headers.set("X-API-KEY", String(args['X-API-KEY']))
if (args.q != null) query.append("q", String(args.q))
if (args.chain_ids != null) query.append("chain_ids", String(args.chain_ids))
if (args.limit != null) query.append("limit", String(args.limit))
if (APIKeyHeader !== undefined) headers.set("X-API-KEY", APIKeyHeader)

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