from __future__ import annotations

import logging

logger = logging.getLogger(__name__)


class MattermostThreadingAdapter:
    def __init__(self, account: dict):
        self.reply_to_mode = account.get("reply_to_mode", "off")

    def extract_thread_id(self, root_id: str) -> str | None:
        if root_id:
            return root_id
        return None

    def resolve_reply_target(
        self,
        post_id: str,
        root_id: str,
        chat_type: str,
    ) -> tuple[str | None, str | None]:
        if self.reply_to_mode == "off":
            return None, None

        if chat_type == "direct":
            return None, None if self.reply_to_mode != "all" else root_id

        if self.reply_to_mode == "first":
            return root_id or None, root_id or None

        if self.reply_to_mode == "all":
            return root_id or post_id, root_id or None

        if self.reply_to_mode == "batched":
            return root_id or post_id, root_id or None

        return None, None

    def build_thread_context(
        self,
        root_id: str,
        post_id: str,
        channel_id: str,
        chat_type: str,
    ) -> dict:
        reply_to_id, thread_id = self.resolve_reply_target(post_id, root_id, chat_type)
        return {
            "channel_id": channel_id,
            "root_id": root_id,
            "post_id": post_id,
            "reply_to_id": reply_to_id,
            "thread_id": thread_id,
            "reply_to_mode": self.reply_to_mode,
        }