export type FilterValue =
  | string
  | {
      operator?: string;
      value: string;
    };

export const buildFilterParam = (filters: Record<string, FilterValue>) => {
  const filterExpressions: string[] = [];

  for (const [key, filterValue] of Object.entries(filters)) {
    if (!filterValue) continue;

    let operator = "==";
    let value: string;

    if (typeof filterValue === "string") {
      value = filterValue;
    } else {
      operator = filterValue.operator || "==";
      value = filterValue.value;
    }

    if (!value) continue;

    const encodedValue = encodeURIComponent(value);
    const needsEqualsPrefix = /^[A-Za-z]/.test(operator);
    const operatorSegment = needsEqualsPrefix ? `=${operator}` : operator;

    filterExpressions.push(`${key}${operatorSegment}/${encodedValue}`);
  }

  return filterExpressions.length > 0 ? filterExpressions.join(",") : undefined;
};