import {z} from 'zod'

export type GetApiAssetsSlugArgs = {slug: string};

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

export const getApiAssetsSlugResponse = z.object({timestamp: z.number().int().optional(), data: z.object({id: z.string().optional(), rank: z.string().nullable().optional(), symbol: z.string().optional(), name: z.string().optional(), supply: z.string().optional(), maxSupply: z.string().optional(), marketCapUsd: z.string().optional(), volumeUsd24Hr: z.string().optional(), priceUsd: z.string().optional(), changePercent24Hr: z.string().nullable().optional(), vwap24Hr: z.string().nullable().optional(), explorer: z.string().optional(), tokens: z.record(z.string(), z.array(z.string())).optional()}).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
};

/**
 * Retrieve a single asset
 * 
 * GET /assets/{slug}
 * 
 * Also accepts auth: apiKey
 */
export const getApiAssetsSlug = async (args: GetApiAssetsSlugArgs, options?: GetApiAssetsSlugOptions) => {
const {baseUrl = "https://rest.coincap.io/v3", fetch: fetchFn = fetch, bearerAuth} = options ?? {}

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

if (bearerAuth !== undefined) headers.set('authorization', `Bearer ${bearerAuth}`)

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