export const CONFIG_UI_RESERVED_ROWS = 8;
export const MIN_VISIBLE_ROW_COUNT = 4;

export function activeLineCount(lines: readonly (readonly unknown[])[]): number {
  return lines.filter((line) => line.length > 0).length;
}

export function visibleRowCount(
  terminalRows: number,
  heightRatio: number,
  activeLines: number,
): number {
  return Math.max(
    MIN_VISIBLE_ROW_COUNT,
    Math.floor(terminalRows * heightRatio) - CONFIG_UI_RESERVED_ROWS - activeLines,
  );
}