/** Valeurs nécessaires pour déterminer une destination d’export. */
export type ExportableInvoice = {
  recipientName?: string | null;
  ventilationComptable?: string | null;
};

export type ExportRuleCandidate = {
  isActive: number;
  priority: number;
  conditionField: "recipientName" | "ventilationComptable";
  conditionValue: string;
};

/**
 * Sélectionne la première règle active par priorité. Les comparaisons sont
 * volontairement insensibles à la casse et aux espaces superflus.
 */
export function findMatchingExportRule<T extends ExportRuleCandidate>(
  rules: T[],
  invoice: ExportableInvoice,
): T | undefined {
  const normalized = (value: string | null | undefined) => value?.trim().toLocaleLowerCase("fr-FR") || "";
  const ordered = [...rules].sort((a, b) => a.priority - b.priority || a.conditionValue.localeCompare(b.conditionValue, "fr-FR"));

  return ordered.find((rule) => {
    if (rule.isActive !== 1) return false;
    const invoiceValue = rule.conditionField === "recipientName"
      ? invoice.recipientName
      : invoice.ventilationComptable;
    return normalized(invoiceValue) === normalized(rule.conditionValue);
  });
}