"""SMTP2GO SMS REST API."""

import logging

import requests
from django.conf import settings

from messaging.services import render_merge_tags

logger = logging.getLogger(__name__)


def send_sms(message) -> str:
    contact = message.contact
    if not contact.phone:
        raise ValueError("Contact has no phone number")

    api_key = settings.SMTP2GO_SMS_API_KEY
    if not api_key:
        raise RuntimeError("SMTP2GO_SMS_API_KEY is not configured")

    campaign = message.campaign
    body = message.body_snapshot or campaign.body_override or (
        campaign.template.body if campaign.template else ""
    )
    body = render_merge_tags(body, contact)

    payload = {
        "api_key": api_key,
        "to": contact.phone,
        "text": body[:1600],
    }
    response = requests.post(
        settings.SMTP2GO_SMS_API_URL,
        json=payload,
        timeout=30,
    )
    response.raise_for_status()
    data = response.json() if response.content else {}
    # SMTP2GO returns varying shapes; store a useful id when present.
    return str(
        data.get("data", {}).get("sms_id")
        or data.get("request_id")
        or f"sms-{message.pk}"
    )