import socket, time, hashlib

class RouterOSApi:
    def __init__(self, host, port=8728):
        self.host = host; self.port = port; self.sock = None
    def connect(self, username, password):
        self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        self.sock.settimeout(10)
        self.sock.connect((self.host, self.port))
        self._write_sentence('/login', f'=name={username}', f'=password={password}')
        resp = self._read_response()
        if any(isinstance(r, tuple) and r[0] == '!trap' for r in resp):
            chal = None
            for item in resp:
                if isinstance(item, dict) and 'ret' in item: chal = item['ret']
            if chal and len(chal) == 32:
                response = '00' + hashlib.md5(b'\x00' + password.encode() + bytes.fromhex(chal)).hexdigest()
                self._write_sentence('/login', f'=name={username}', f'=response={response}')
                resp = self._read_response()
        return self
    def _encode_length(self, length):
        if length < 0x80: return bytes([length])
        elif length < 0x4000: length |= 0x8000; return bytes([(length>>8)&0xFF, length&0xFF])
        elif length < 0x200000: length |= 0xC00000; return bytes([(length>>16)&0xFF, (length>>8)&0xFF, length&0xFF])
        elif length < 0x10000000: length |= 0xE0000000; return bytes([(length>>24)&0xFF, (length>>16)&0xFF, (length>>8)&0xFF, length&0xFF])
        else: return bytes([0xF0, (length>>24)&0xFF, (length>>16)&0xFF, (length>>8)&0xFF, length&0xFF])
    def _write_word(self, word): self.sock.sendall(self._encode_length(len(word)) + word.encode('utf-8'))
    def _write_sentence(self, cmd, *words):
        self._write_word(cmd)
        for w in words: self._write_word(w)
        self.sock.sendall(b'\x00')
    def _read_byte(self): return self.sock.recv(1)
    def _read_word(self):
        first = self._read_byte();
        if first == b'\x00': return None
        lb = first[0]
        if lb & 0x80:
            if (lb & 0xC0) == 0x80: length = ((lb & 0x3F) << 8) + self._read_byte()[0]
            elif (lb & 0xE0) == 0xC0: length = ((lb & 0x1F) << 16) + (self._read_byte()[0] << 8) + self._read_byte()[0]
            elif (lb & 0xF0) == 0xE0: length = ((lb & 0x0F) << 24) + (self._read_byte()[0] << 16) + (self._read_byte()[0] << 8) + self._read_byte()[0]
            else: length = (self._read_byte()[0] << 24) + (self._read_byte()[0] << 16) + (self._read_byte()[0] << 8) + self._read_byte()[0]
        else: length = lb
        data = b''
        while len(data) < length:
            chunk = self.sock.recv(length - len(data))
            if not chunk: break
            data += chunk
        return data.decode('utf-8', errors='replace')
    def _read_sentence(self):
        words = []
        while True:
            w = self._read_word()
            if w is None: break
            words.append(w)
        return words
    def _read_response(self):
        responses = []
        while True:
            sentence = self._read_sentence()
            if not sentence: break
            reply = sentence[0]; rest = sentence[1:]
            if reply == '!done': break
            elif reply == '!re':
                d = {}
                for w in rest:
                    if '=' in w:
                        parts = w.split('=', 2)
                        d[parts[1]] = parts[2] if len(parts) >= 3 else ''
                    else: d[w] = ''
                responses.append(d)
            elif reply == '!trap': responses.append(('!trap', rest))
            elif reply == '!fatal': raise Exception(f"Fatal: {rest}")
            else: responses.append((reply, rest))
        return responses
    def cmd(self, command, **attrs):
        words = [command]
        for k, v in attrs.items():
            if k.startswith('?'): words.append(f'{k}={v}')
            else: words.append(f'={k}={v}')
        self._write_sentence(*words)
        return self._read_response()
    def close(self):
        if self.sock: self.sock.close(); self.sock = None

# ===== TEST =====
api = RouterOSApi('192.168.100.2')
api.connect('mi4', 'm14')

# Get Bulanan2
resp = api.cmd('/system/scheduler/print', **{'?name': 'Bulanan2'})
item = resp[0]
oid = item['.id']
current_oe = item.get('on-event', '')
print(f"Current on-event length: {len(current_oe)}")
print(f"Current .id: {oid}")

# Test: set to very short script
short_script = ':put "test123"'
print(f"\nSetting on-event to: '{short_script}' (len={len(short_script)})")
set_resp = api.cmd('/system/scheduler/set', **{'.id': oid, 'on-event': short_script})
for r in set_resp:
    print(f"  Response: {r}")

# Verify via fresh API call
resp2 = api.cmd('/system/scheduler/print', **{'?name': 'Bulanan2'})
oe2 = resp2[0].get('on-event', '')
print(f"\nVerification:")
print(f"  After set: '{oe2[:80]}'")
print(f"  Match: {oe2 == short_script}")
print(f"  len: {len(oe2)}")

# Now set it BACK to original
print(f"\nRestoring original on-event...")
api.cmd('/system/scheduler/set', **{'.id': oid, 'on-event': current_oe})
resp3 = api.cmd('/system/scheduler/print', **{'?name': 'Bulanan2'})
oe3 = resp3[0].get('on-event', '')
print(f"  Restored len: {len(oe3)}")
print(f"  Match original: {oe3 == current_oe}")

api.close()