import logging

import httpx

logger = logging.getLogger(__name__)

MESSENGER_API_BASE = "https://graph.facebook.com/v22.0"


class MessengerOneTimeNotification:
    def __init__(self, page_id: str, access_token: str):
        self._page_id = page_id
        self._access_token = access_token

    async def request_otn(self, psid: str, title: str, payload: str) -> dict | None:
        url = f"{MESSENGER_API_BASE}/{self._page_id}/messages"
        body = {
            "recipient": {"id": psid},
            "message": {
                "attachment": {
                    "type": "template",
                    "payload": {
                        "template_type": "one_time_notif_req",
                        "title": title,
                        "payload": payload,
                    },
                }
            },
        }
        try:
            async with httpx.AsyncClient(timeout=httpx.Timeout(30.0)) as client:
                resp = await client.post(
                    url,
                    params={"access_token": self._access_token},
                    json=body,
                )
                if resp.status_code == 200:
                    return resp.json()
                logger.error(f"messenger OTN request failed: {resp.status_code} {resp.text}")
                return None
        except Exception:
            logger.exception("messenger OTN request error")
            return None

    async def send_otn_message(
        self,
        psid: str,
        text: str,
        one_time_notif_token: str,
    ) -> dict | None:
        url = f"{MESSENGER_API_BASE}/{self._page_id}/messages"
        body = {
            "recipient": {"one_time_notif_token": one_time_notif_token},
            "message": {"text": text},
        }
        try:
            async with httpx.AsyncClient(timeout=httpx.Timeout(30.0)) as client:
                resp = await client.post(
                    url,
                    params={"access_token": self._access_token},
                    json=body,
                )
                if resp.status_code == 200:
                    return resp.json()
                logger.error(f"messenger OTN send failed: {resp.status_code} {resp.text}")
                return None
        except Exception:
            logger.exception("messenger OTN send error")
            return None