public class CEOApprover extends BaseApprover {
    private static final double MIN_APPROVAL_AMOUNT = 50000.01; // 大于VP的审批上限
    
    public CEOApprover(String approverName, Logger logger) {
        super(approverName, ApprovalLevel.CEO, logger);
    }
    
    @Override
    protected boolean canApprove(Order order) {
        // CEO审批金额超过50000的特大订单
        return order.getAmount() > MIN_APPROVAL_AMOUNT;
    }
    
    @Override
    protected boolean performApproval(Order order, ApprovalContext context) {
        // CEO审批逻辑：最高级别的审批，通常需要完整的审批链和严格的条件
        OrderValidator validator = new OrderValidator();
        boolean basicValid = validator.validateOrder(order);
        
        // CEO审批前必须确保有所有低级别的审批记录
        if (context.getApprovalHistory().size() < 3) { // 至少需要经理、总监、VP的审批
            getLogger().error("缺少必要的前置审批，CEO无法审批");
            return false;
        }
        
        // 检查所有前置审批是否都已通过
        boolean allPreviousApproved = context.getApprovalHistory().stream()
            .allMatch(record -> record.approved);
        
        if (!allPreviousApproved) {
            getLogger().warn("存在未通过的前置审批，CEO审批被拒绝");
            return false;
        }
        
        // 特大订单的特殊处理
        getLogger().info("CEO审批特大订单: " + order.getOrderId() + "，金额: " + order.getAmount());
        
        // 可以在这里添加更复杂的业务逻辑，如检查公司预算等
        
        return basicValid;
    }
}