"""HTTP chat proxy helpers for opt-in Telegram agent routing."""

from __future__ import annotations

from typing import Any


def build_chat_proxy_payload(
    *,
    message: str,
    source: str,
    agent: str,
    chat_id: int | None = None,
    message_id: int | None = None,
    username: str | None = None,
) -> dict[str, Any]:
    """Build the no-secret payload sent from Telegram to an agent HTTP chat route."""
    metadata = {
        "source": source,
        "agent": agent,
        "chat_id": chat_id,
        "message_id": message_id,
        "username": username,
    }
    return {
        "message": message,
        "metadata": {k: v for k, v in metadata.items() if v is not None},
    }


def extract_chat_proxy_reply(payload: dict[str, Any]) -> str | None:
    """Extract a reply from supported Living IP Leo chat response shapes."""
    if not isinstance(payload, dict):
        return None

    direct_reply = payload.get("reply")
    if isinstance(direct_reply, str) and direct_reply.strip():
        return direct_reply.strip()

    decision = payload.get("decision")
    if isinstance(decision, dict):
        decision_reply = decision.get("reply")
        if isinstance(decision_reply, str) and decision_reply.strip():
            return decision_reply.strip()

    llm = payload.get("llm")
    if isinstance(llm, dict):
        llm_reply = llm.get("reply")
        if isinstance(llm_reply, str) and llm_reply.strip():
            return llm_reply.strip()
        llm_decision = llm.get("decision")
        if isinstance(llm_decision, dict):
            llm_decision_reply = llm_decision.get("reply")
            if isinstance(llm_decision_reply, str) and llm_decision_reply.strip():
                return llm_decision_reply.strip()

    return None


async def post_chat_proxy(
    *,
    url: str,
    payload: dict[str, Any],
    timeout_seconds: int = 30,
) -> tuple[int, dict[str, Any], str | None]:
    """POST to an agent HTTP chat route and return status, JSON body, and reply."""
    import aiohttp

    async with aiohttp.ClientSession(timeout=aiohttp.ClientTimeout(total=timeout_seconds)) as session:
        async with session.post(
            url,
            json=payload,
            headers={
                "Accept": "application/json",
                "Content-Type": "application/json",
                "X-LivingIP-Source": "telegram-agent-proxy",
            },
        ) as resp:
            data = await resp.json(content_type=None)
            return resp.status, data, extract_chat_proxy_reply(data)