"""알림톡 대행사 계약은 여기 한 곳에만 둔다. 승인 URL·전화번호·응답 원문을 로깅하지 않는다."""

import hashlib
import hmac
from config import social_config as config
import secrets
from datetime import datetime, timezone


def is_configured():
    return all(
        config.get(k)
        for k in (
            "ALIMTALK_API_KEY",
            "ALIMTALK_API_SECRET",
            "ALIMTALK_PROFILE_ID",
            "ALIMTALK_SENDER",
            "ALIMTALK_TEMPLATE_CODE",
        )
    )


async def send(to, template_code, variables, *, client):
    date = datetime.now(timezone.utc).isoformat()
    salt = secrets.token_hex(16)
    signature = hmac.new(
        config.required("ALIMTALK_API_SECRET").encode(),
        (date + salt).encode(),
        hashlib.sha256,
    ).hexdigest()
    res = await client.post(
        "https://api.solapi.com/messages/v4/send-many/detail",
        headers={
            "Authorization": f"HMAC-SHA256 apiKey={config.required('ALIMTALK_API_KEY')}, date={date}, salt={salt}, signature={signature}"
        },
        json={
            "messages": [
                {
                    "to": to,
                    "from": config.required("ALIMTALK_SENDER"),
                    "type": "ATA",
                    "kakaoOptions": {
                        "pfId": config.required("ALIMTALK_PROFILE_ID"),
                        "templateId": template_code,
                        "variables": variables,
                        "disableSms": True,
                    },
                }
            ],
            "allowDuplicates": False,
        },
    )
    if res.status_code not in (200, 201):
        raise RuntimeError("ALIMTALK_SEND_FAILED")
    data = res.json()
    if data.get("failedMessageList") or not data.get("groupInfo"):
        raise RuntimeError("ALIMTALK_SEND_FAILED")