from __future__ import annotations

from yuxi.channel.protocols import SessionResolution


class GitHubSessionAdapter:

    def resolve_session(self, msg: object) -> SessionResolution:
        group = getattr(msg, "group", None)
        if not group or not hasattr(group, "id"):
            sender = getattr(msg, "sender", None)
            if sender and hasattr(sender, "id"):
                return SessionResolution(kind="direct", conversation_id=f"github:dm:{sender.id}")
            return SessionResolution(kind="direct", conversation_id="github:unknown")

        return SessionResolution(
            kind="group",
            conversation_id=group.id,
            label=getattr(group, "name", ""),
        )

    @staticmethod
    def build_session_key(repo_full_name: str, kind: str, number: int) -> str:
        return f"github:{repo_full_name}:{kind}:{number}"

    @staticmethod
    def parse_session_key(session_key: str) -> tuple[str, str, int] | None:
        parts = session_key.split(":")
        if len(parts) < 5 or parts[0] != "github":
            return None
        return parts[1], parts[3], int(parts[4])