;;; ------------------------------------------------------------
;;; AutoCATS 리습 자료실
;; 명령: CREVERSE
;; 기능: 선택한 지원 곡선의 진행 방향 반전
;; 출처: https://www.autocats.co.kr/lisp/curve-reverse
;; 버전: 1.0 (2026-07-23)
;; 라이선스: 자유 사용·수정, 재배포 시 출처(autocats.co.kr) 표기
;; 안전: *error* 핸들러 + UNDO 그룹, 잠긴 레이어 건너뜀
;;; ------------------------------------------------------------

(vl-load-com)

(defun autocats-creverse-locked-p (ent / row)
  (setq row (tblsearch "LAYER" (cdr (assoc 8 (entget ent)))))
  (and row (= 4 (logand 4 (cdr (assoc 70 row))))))

(defun autocats-creverse-one (ent / before result after)
  (setq before (entget ent)
        result
        (vl-catch-all-apply
          '(lambda ()
             (command "_.REVERSE" ent "")
             T))
        after (entget ent))
  (and (not (vl-catch-all-error-p result))
       after
       (not (equal before after))))

(defun c:CREVERSE (/ *error* doc undo-open oldecho ss idx ent changed skipped)
  (defun *error* (msg)
    (if undo-open
      (progn (vla-EndUndoMark doc) (setq undo-open nil)))
    (if oldecho (setvar "CMDECHO" oldecho))
    (if (and msg (not (wcmatch (strcase msg) "*CANCEL*,*QUIT*,*EXIT*,*취소*")))
      (princ (strcat "\n[CREVERSE] 중단: " msg)))
    (princ))

  (princ "\n[CREVERSE] 방향을 반전할 곡선을 선택하세요.")
  (setq ss (ssget '((0 . "LINE,LWPOLYLINE,POLYLINE,ARC,SPLINE"))))
  (if ss
    (progn
      (setq doc (vla-get-ActiveDocument (vlax-get-acad-object))
            oldecho (getvar "CMDECHO")
            idx 0 changed 0 skipped 0)
      (setvar "CMDECHO" 0)
      (vla-StartUndoMark doc)
      (setq undo-open T)
      (while (< idx (sslength ss))
        (setq ent (ssname ss idx))
        (if (or (autocats-creverse-locked-p ent)
                (not (autocats-creverse-one ent)))
          (setq skipped (1+ skipped))
          (setq changed (1+ changed)))
        (setq idx (1+ idx)))
      (vla-EndUndoMark doc)
      (setq undo-open nil)
      (setvar "CMDECHO" oldecho)
      (setq oldecho nil)
      (princ (strcat "\n[CREVERSE] 완료: " (itoa changed)
                     "개 반전 / " (itoa skipped) "개 건너뜀")))
    (princ "\n[CREVERSE] 선택된 곡선이 없습니다."))
  (princ))

(princ "\n[AutoCATS] CREVERSE 로드 완료 - 명령행에 CREVERSE 를 입력하세요.")
(princ)