from pathlib import Path

exported = Path(r'F:\Apps\Crusader No Regret\REGRET.EXE')
hand = Path(r'F:\Apps\Crusader No Regret\REGRET-DEBUGGER.EXE')
original = Path(r'F:\Apps\Crusader No Regret\REGRET - Copy.EXE')

files = {
    'exported': exported.read_bytes(),
    'hand': hand.read_bytes(),
    'original': original.read_bytes(),
}

for name, data in files.items():
    print(f'{name}: size={len(data)}')

print('')

pairs = [('exported', 'hand'), ('exported', 'original'), ('hand', 'original')]
for left, right in pairs:
    a = files[left]
    b = files[right]
    diff_offsets = [index for index, (ba, bb) in enumerate(zip(a, b)) if ba != bb]
    if len(a) != len(b):
        print(f'{left} vs {right}: different sizes')
    print(f'{left} vs {right}: differing byte positions={len(diff_offsets)}')
    if diff_offsets:
        preview = diff_offsets[:20]
        print(f'  first offsets: {preview}')
    print('')

patterns = {
    'call_bootstrap': bytes.fromhex('9a00009813'),
    'call_open_modal': bytes.fromhex('9a0d029813'),
    'call_old_dialog': bytes.fromhex('9a46005013'),
}

for name, data in files.items():
    print(f'Pattern scan in {name}:')
    for pattern_name, pattern in patterns.items():
        hits = []
        start = 0
        while True:
            offset = data.find(pattern, start)
            if offset == -1:
                break
            hits.append(offset)
            start = offset + 1
        print(f'  {pattern_name}: {len(hits)} hits; first 20={hits[:20]}')
    print('')

active_branch_context_original = bytes.fromhex(
    '6aff6affc41e985c268a4705501e68d5306a006a0083ec06c746e800008b46e8f7d08946eac646ec006a006a009a4600501383c414'
)
active_branch_context_patched = bytes.fromhex(
    '6aff6affc41e985c268a4705501e68d5306a006a0083ec06c746e800008b46e8f7d08946eac646ec006a006a009a0d02981383c414'
)

for name, data in files.items():
    orig_hit = data.find(active_branch_context_original)
    patch_hit = data.find(active_branch_context_patched)
    print(f'{name}: active-branch old-context offset={orig_hit}, patched-context offset={patch_hit}')

print('')

diff_offsets = [506633, 506649, 506665]
for offset in diff_offsets:
    print(f'Context around offset {offset}:')
    start = max(0, offset - 6)
    end = offset + 10
    for name, data in files.items():
        print(f'  {name}: {data[start:end].hex()}')
    print('')