import {z} from 'zod'

export type GetApiOrganisationsVatVrnLiabilitiesArgs = {vrn: string, from: string, to: string, 'Gov-Test-Scenario'?: string | undefined};

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

export const getApiOrganisationsVatVrnLiabilitiesResponse = z.object({liabilities: z.array(z.object({taxPeriod: z.object({from: z.string(), to: z.string()}).optional(), type: z.string(), originalAmount: z.number().gte(-9999999999999.99).lte(9999999999999.99).multipleOf(0.01), outstandingAmount: z.number().gte(-9999999999999.99).lte(9999999999999.99).multipleOf(0.01).optional(), due: 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
};

/**
 * Retrieve VAT liabilities
 * 
 * GET /organisations/vat/{vrn}/liabilities
 */
export const getApiOrganisationsVatVrnLiabilities = async (args: GetApiOrganisationsVatVrnLiabilitiesArgs, options?: GetApiOrganisationsVatVrnLiabilitiesOptions) => {
const {baseUrl = "https://test-api.service.hmrc.gov.uk", fetch: fetchFn = fetch, userRestricted} = options ?? {}

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

if (args.from != null) query.append("from", String(args.from))
if (args.to != null) query.append("to", String(args.to))
if (args['Gov-Test-Scenario'] != null) headers.set("Gov-Test-Scenario", String(args['Gov-Test-Scenario']))
if (userRestricted !== undefined) headers.set('authorization', `Bearer ${userRestricted}`)

const url = `${baseUrl.replace(/\/+$/, '')}/organisations/vat/${encodeURIComponent(String(args.vrn))}/liabilities${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(getApiOrganisationsVatVrnLiabilitiesResponse, await res.json())
};