import openpyxl
from openpyxl.utils import get_column_letter
wb=openpyxl.load_workbook('한국지역난방공사.xlsx'); ws=wb.active
ms=list(ws.merged_cells.ranges)
N=ws.max_row
errs=[]
# 1 header merges intact
hdr={'B1:R1','S1:W1','Y1:AA1'}
have=set(str(m) for m in ms)
for h in hdr:
    if h not in have: errs.append('header merge missing '+h)
# 2 merge overlaps
cells={}
for m in ms:
    for r in range(m.min_row,m.max_row+1):
        for c in range(m.min_col,m.max_col+1):
            if (r,c) in cells: errs.append(f'overlap at {get_column_letter(c)}{r}')
            cells[(r,c)]=1
# 3 child merge must not cross parent boundary: for each col c in E..J, a merge cannot span rows whose parent(c-1 effective) differ
def eff(r,c):
    v=ws.cell(r,c).value
    if v is not None: return v
    for m in ms:
        if m.min_row<=r<=m.max_row and m.min_col<=c<=m.max_col: return ws.cell(m.min_row,m.min_col).value
    return None
for m in ms:
    if m.min_row>=3 and 5<=m.min_col<=10:
        pc=m.min_col-1
        pv=set(eff(r,pc) for r in range(m.min_row,m.max_row+1))
        if len(pv)>1: errs.append(f'merge {m} crosses parent {get_column_letter(pc)} values {pv}')
# 4 every data row has D and at least leaf; D must be non-empty(eff)
holes=0
for r in range(3,N+1):
    if eff(r,4) in (None,''): holes+=1
if holes: errs.append(f'{holes} rows with empty D')
# 5 K hyperlink consistency
for r in range(3,N+1):
    k=ws.cell(r,11)
    if k.value and (not k.hyperlink or k.hyperlink.target!=k.value):
        errs.append(f'K{r} link mismatch')
# 6 blue N cells preserved (>=12) and Y/Z/AA fill region
bluecnt=sum(1 for r in range(3,N+1) for c in [14] if ws.cell(r,c).fill.patternType=='solid' and getattr(ws.cell(r,c).fill.fgColor,'rgb','')=='FFBDD7EE')
# 7 B sequential
bs=[ws.cell(r,2).value for r in range(3,N+1)]
if bs!=list(range(1,len(bs)+1)): errs.append('B not sequential')
# 8 page M=1, site MNOPQ empty, board M numeric
for r in range(3,N+1):
    L=ws.cell(r,12).value;M=ws.cell(r,13).value
    if L=='페이지' and M!=1: errs.append(f'page M!=1 r{r}')
    if L=='사이트' and any(ws.cell(r,c).value not in (None,'') for c in (13,14,15,16,17)): errs.append(f'site filled r{r}')
print('rows',N-2,'merges',len(ms),'blueN cells(any)',bluecnt)
print('ERRORS:',len(errs))
for e in errs[:30]: print('  ',e)