// --- Callbacks

        private void OnHexClicked(HexCell hex)
        {
            if (SelectedSkill == SkillType.None || UnitSelectionManager.SelectedUnit == null)
            {
                return;
            }

            // Skill range ?
            // Unit correctness with skill ?

            CrossPlayerController.PerformSkill(UnitSelectionManager.SelectedUnit, hex.Position, SelectedSkill);

            SkillPerformed?.Invoke(SelectedSkill, hex);
        }
        private void OnPerformSkillCallback(Unit unit, int2 target, SkillType skill)
        {
            if (skill == SkillType.Attack)
            {
                var targetUnit = HexDatabase.GetSelectable(target) as Unit;
                if (targetUnit == null)
                {
                    Debug.LogWarning("targetUnit was null thus cannot be attacked. It should not be possible to initiate attacks on empty cells: " + target);
                }
                else
                {
                    targetUnit.Health -= Math.Abs(unit.Attack - targetUnit.Defense);

                    SkillPerformed?.Invoke(SkillPerformedFinishedFromUI, unit, target, skill);
                    if (SkillPerformed == null)
                    {
                        SkillPerformedFinishedFromUI(unit);
                    }
                }
            }

            TurnManager.EndTurn(unit);
        }