import {z} from 'zod'

export type GetApiPolicyTenantLocatorTermsLocatorChargesArgs = {tenantLocator: string, locator: unknown};

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

export const policyChargeResponse = z.object({locator: z.string(), elementLocator: z.string(), chargeType: z.string(), chargeCategory: z.enum(["none", "premium", "tax", "fee", "credit", "invoiceFee", "cededPremium", "nonFinancial", "surcharge"]), amount: z.number(), rate: z.number(), referenceRate: z.number(), tag: z.string().optional(), rateDifference: z.number().optional(), elementStaticLocator: z.string(), reversalOfLocator: z.string().optional(), handling: z.enum(["flat", "normal", "retention"]), invoicing: z.enum(["scheduled", "next", "immediate"])});

export const getApiPolicyTenantLocatorTermsLocatorChargesResponse = z.record(z.string(), z.array(policyChargeResponse));

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 /policy/{tenantLocator}/terms/{locator}/charges
 */
export const getApiPolicyTenantLocatorTermsLocatorCharges = async (args: GetApiPolicyTenantLocatorTermsLocatorChargesArgs, options: GetApiPolicyTenantLocatorTermsLocatorChargesOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

const url = `${baseUrl.replace(/\/+$/, '')}/policy/${encodeURIComponent(String(args.tenantLocator))}/terms/${encodeURIComponent(String(args.locator))}/charges${query.size > 0 ? `?${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(getApiPolicyTenantLocatorTermsLocatorChargesResponse, await res.json())
};