import re

src = open('App/sims/klima/game-2d.html', 'r', encoding='utf-8').read()
scripts = list(re.finditer(r'<script(?![^>]*src=)[^>]*>(.+?)</script>', src, re.DOTALL))
print('scripts:', len(scripts))
# Only 1 script
m = scripts[0]
start_char = m.start(1)
js = m.group(1)

# Determine line offset in source
prefix = src[:start_char]
base_line = prefix.count('\n') + 1
print('base line:', base_line)

js = re.sub(r'/\*.*?\*/', '', js, flags=re.DOTALL)

BACKSLASH = chr(92)
out = []
line_map = []  # map cleaned-index -> line
i = 0
n = len(js)
lineno = 0
while i < n:
    c = js[i]
    if c == '/' and i + 1 < n and js[i+1] == '/':
        while i < n and js[i] != '\n':
            i += 1
        continue
    if c in ('"', "'", '`'):
        quote = c
        i += 1
        while i < n:
            if js[i] == BACKSLASH:
                i += 2
                continue
            if js[i] == '\n':
                lineno += 1
            if js[i] == quote:
                i += 1
                break
            i += 1
        continue
    if c == '\n':
        lineno += 1
    out.append(c)
    line_map.append(lineno)
    i += 1

code = ''.join(out)

# Track brace pairs; identify orphan `{` at the end (scope gain > loss by 1)
stack = []  # each entry: (line_in_script, idx)
for idx, ch in enumerate(code):
    ln = line_map[idx]
    if ch == '{':
        stack.append((ln, idx))
    elif ch == '}':
        if stack:
            stack.pop()
        else:
            print('Unmatched } at script line', ln, '= file line', base_line + ln)
if stack:
    # orphan open braces
    for (ln, idx) in stack[-5:]:
        file_line = base_line + ln
        ctx = code[max(0,idx-60):idx+60]
        print('Orphan {{ at script line', ln, '= file line', file_line)
        print('  ctx:', repr(ctx))