# -*- coding: utf-8 -*-
import openpyxl, io
wb=openpyxl.load_workbook("한국지역난방공사.xlsx"); ws=wb.active
out=io.open("_mergeplan_out.txt","w",encoding="utf-8")
def w(*a): out.write(" ".join(str(x) for x in a)+"\n")
COLS={4:'D',5:'E',6:'F',7:'G',8:'H',9:'I',10:'J'}
mx=ws.max_row
# effective values
eff={}
for r in range(3,mx+1):
    for c in range(4,11): eff[(r,c)]=ws.cell(r,c).value
for mr in ws.merged_cells.ranges:
    if mr.min_col>=4 and mr.max_col<=10:
        v=ws.cell(mr.min_row,mr.min_col).value
        for r in range(mr.min_row,mr.max_row+1):
            for c in range(mr.min_col,mr.max_col+1): eff[(r,c)]=v
def ev(r,c):
    v=eff[(r,c)]; return str(v).strip() if v not in(None,"") else ""
def ppath(r,c): return tuple(ev(r,cc) for cc in range(4,c))
# target merges: per col, runs of equal effective value (non-empty) with identical parent path
target=set()  # (col,r1,r2) only when r2>r1
for c in range(4,11):
    r=3
    while r<=mx:
        v=ev(r,c)
        if not v: r+=1; continue
        r2=r
        while r2+1<=mx and ev(r2+1,c)==v and ppath(r2+1,c)==ppath(r,c): r2+=1
        if r2>r: target.add((c,r,r2))
        r=r2+1
# existing single-col merges
existing=set()
for mr in ws.merged_cells.ranges:
    if mr.min_col==mr.max_col and 4<=mr.min_col<=10:
        existing.add((mr.min_col,mr.min_row,mr.max_row))
new=sorted(target-existing)
removed=sorted(existing-target)  # existing merges not in target (will be replaced)
w("=== TARGET vs EXISTING (full re-merge plan) ===")
w("target merges:",len(target),"existing single-col merges:",len(existing))
w(f"\n--- merges to CHANGE/ADD ({len(new)}) ---")
for c,r1,r2 in new:
    # find overlapping existing for context
    ovl=[e for e in existing if e[0]==c and not(e[2]<r1 or e[1]>r2)]
    w(f"  {COLS[c]}{r1}:{COLS[c]}{r2}  '{ev(r1,c)}'   기존:{['%s%d:%d'%(COLS[c],a,b) for (cc,a,b) in ovl] if ovl else '없음(신규)'}")
w(f"\n--- existing merges NOT in target ({len(removed)}) [재병합시 사라짐, 확인용] ---")
for c,r1,r2 in removed:
    w(f"  {COLS[c]}{r1}:{COLS[c]}{r2}  top='{ws.cell(r1,c).value}'")
out.close(); print("new",len(new),"removed-not-in-target",len(removed))
