"""Server tunnel — exposes a local service through I2P.

Ported from net.i2p.i2ptunnel.I2PTunnelServer.
"""

from __future__ import annotations

from dataclasses import dataclass, field


@dataclass
class ServerTunnel:
    """Exposes a local service as an I2P destination.

    Incoming I2P connections are forwarded to local_host:local_port.
    """

    name: str
    local_host: str
    local_port: int
    i2p_port: int = 0  # 0 = auto-assign
    running: bool = False
    bytes_forwarded: int = field(default=0, repr=False)

    def record_forwarded(self, nbytes: int) -> None:
        """Record bytes forwarded through the tunnel."""
        self.bytes_forwarded += nbytes