import { Organization } from 'fhir/r4';

// Mirrors the server's organization-tax.ts - the server WRITES this exact URL, the plugin READS
// it back - so the literal MUST match byte for byte.
export const ORGANIZATION_TAX_RATE_EXTENSION_URL =
    'https://akashichealthrecords.com/fhir/StructureDefinition/organization-tax-rate';

// Pure reader - org-wide sales-tax rate as a percent (e.g. 8.25). 0 when unset/invalid. Tax is
// FROZEN onto each invoice at creation time - this reader is only for the current/live rate
// (Platform Manager settings UI, editor breakdown), never for re-deriving an issued invoice's tax.
export const getOrganizationTaxRate = (org?: Organization): number => {
    const value = org?.extension?.find((e) => e.url === ORGANIZATION_TAX_RATE_EXTENSION_URL)?.valueDecimal;
    return typeof value === 'number' && Number.isFinite(value) ? value : 0;
};