import {z} from 'zod'

export type GetApiV1TaxTaxRateArgs = {queryParams?: ({amount: number, currency: string, taxSource: 'zipcode', country: string, zipCode?: string | undefined} | {amount: number, currency: string, taxSource: 'ip', country: string, ip: string}) | undefined};

export type GetApiV1TaxTaxRateOptions = {baseUrl?: string | undefined, basicAuth?: {username: string, password: string} | undefined, fetch?: typeof fetch | undefined};

export const getMerchantTaxRateResponse = z.object({taxRate: z.number(), amountToCollect: z.number(), ipInaccurate: z.boolean().optional()});

export const getApiV1TaxTaxRateResponse = z.object({status: z.literal("SUCCEEDED"), data: getMerchantTaxRateResponse});

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 tax rate for merchant
 * 
 * GET /v1/tax/tax_rate
 */
export const getApiV1TaxTaxRate = async (args: GetApiV1TaxTaxRateArgs, options?: GetApiV1TaxTaxRateOptions) => {
const {baseUrl = "https://api.breeze.cash", fetch: fetchFn = fetch, basicAuth} = options ?? {}

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

if (args.queryParams != null) query.append("queryParams", String(args.queryParams))
if (basicAuth !== undefined) headers.set('authorization', `Basic ${btoa(`${basicAuth.username}:${basicAuth.password}`)}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/tax/tax_rate${query.size > 0 ? `?${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(getApiV1TaxTaxRateResponse, await res.json())
};