from __future__ import annotations

import logging

logger = logging.getLogger(__name__)


class LineSecurityAdapter:
    DM_POLICY_OPTIONS = ["pairing", "allowlist", "open", "disabled"]
    GROUP_POLICY_OPTIONS = ["open", "allowlist", "disabled"]

    def resolve_dm_policy(self) -> dict:
        return {"mode": "pairing", "allow_from": []}

    def resolve_dm_policy_for_account(self, account: dict) -> dict:
        mode = account.get("dm_policy", "pairing")
        return {"mode": mode, "allow_from": account.get("allow_from", [])}

    async def check_allowlist(self, peer_id: str, channel_type: str) -> bool:
        return True

    def resolve_group_policy(self) -> dict:
        return {"mode": "allowlist", "group_allow_from": []}

    def is_allowed_dm(self, peer_id: str, allow_from: list[str], policy: str) -> bool:
        if "*" in allow_from:
            return True
        if policy == "open":
            return "*" in allow_from
        if policy == "disabled":
            return False
        if policy == "allowlist":
            return self._match_peer(peer_id, allow_from)
        if policy == "pairing":
            return self._match_peer(peer_id, allow_from)
        return False

    def is_allowed_group(self, group_id: str, group_allow_from: list[str], policy: str) -> bool:
        if policy == "open":
            return True
        if policy == "disabled":
            return False
        if policy == "allowlist":
            return self._match_group(group_id, group_allow_from)
        return False

    def resolve_require_mention(self, ctx) -> bool | None:
        config = getattr(ctx, "config", {}) if ctx else {}
        group_id = getattr(ctx, "group_id", None) if ctx else None

        if group_id:
            groups = config.get("channels", {}).get("line", {}).get("groups", {})
            group_cfg = groups.get(group_id, {})
            if "require_mention" in group_cfg:
                return group_cfg["require_mention"]

        return True

    def resolve_group_intro_hint(self, ctx) -> str | None:
        return None

    def resolve_tool_policy(self, ctx) -> dict | None:
        return None

    @staticmethod
    def _match_peer(peer_id: str, allow_from: list[str]) -> bool:
        for entry in allow_from:
            entry = entry.strip()
            if entry == "*":
                return True
            if entry.startswith("line:user:"):
                target = entry[10:]
            elif entry.startswith("line:"):
                target = entry[5:]
            else:
                target = entry
            if target == peer_id:
                return True
        return False

    @staticmethod
    def _match_group(group_id: str, group_allow_from: list[str]) -> bool:
        for entry in group_allow_from:
            entry = entry.strip()
            if entry == "*":
                return True
            if entry.startswith("group:"):
                target = entry[6:]
            elif entry.startswith("room:"):
                target = entry[5:]
            else:
                target = entry
            if target == group_id:
                return True
        return False