import {z} from 'zod'

export type GetApiApiUsageArgs = {format?: ('JSON' | 'CSV') | undefined, delimiter?: string | undefined, timezone?: string | undefined};

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

export const getApiApiUsageResponse = z.object({timestamp: z.string(), current_usage: z.number().int(), plan_limit: z.number().int(), daily_usage: z.number().int().optional(), plan_daily_limit: z.number().int().optional(), plan_category: z.string().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
};

/**
 * API usage
 * 
 * GET /api_usage
 * 
 * Also accepts auth: queryParameter
 */
export const getApiApiUsage = async (args: GetApiApiUsageArgs, options?: GetApiApiUsageOptions) => {
const {baseUrl = "https://api.twelvedata.com", fetch: fetchFn = fetch, authorizationHeader} = options ?? {}

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

if (args.format != null) query.append("format", String(args.format))
if (args.delimiter != null) query.append("delimiter", String(args.delimiter))
if (args.timezone != null) query.append("timezone", String(args.timezone))
if (authorizationHeader !== undefined) headers.set("Authorization", authorizationHeader)

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