import logging

import requests
from celery import shared_task
from django.conf import settings

logger = logging.getLogger(__name__)


def _send_sms(receptor, pattern_code, variables: list = None):
    """
    Send OTP SMS using SMS.ir verify API
    """
    SMS_ENDPOINT = "https://api.sms.ir/v1/send/verify"

    variables = variables or []

    headers = {
        "Content-Type": "application/json",
        "Accept": "application/json",
        "x-api-key": settings.SMS_APIKEY,
    }

    payload = {
        "mobile": receptor,
        "templateId": int(pattern_code),
        "parameters": variables,
    }

    logger.info("Sending SMS to %s with payload: %s", receptor, payload)

    try:
        response = requests.post(
            SMS_ENDPOINT,
            json=payload,
            headers=headers,
            timeout=10,
        )

        logger.info("Response status: %s", response.status_code)
        logger.info("Response text: %s", response.text)

        if response.status_code == 200:
            result = response.json()

            if str(result.get("status", "")) == "1":
                logger.info("SMS sent successfully to %s", receptor)
            else:
                logger.error("SMS.ir API error: %s", result)
        else:
            logger.error("HTTP error sending SMS: %s - %s", response.status_code, response.text)

        return response

    except requests.exceptions.RequestException:
        logger.error("Network error in send_sms", exc_info=True)
        return None


@shared_task
def send_verification_sms(mobile, code):
    logger.info(f"Starting to send SMS to {mobile} with code {code}")
    try:
        if not settings.SMS_APIKEY:
            logger.info("SMS_APIKEY is not configured. Skipping real SMS delivery for %s with code %s", mobile, code)
            return {"mobile": mobile, "code": str(code), "sent": False}

        variables = [{"name": "OTP", "value": str(code)}]
        response = _send_sms(mobile, 570574, variables=variables)
        if response and response.status_code == 200:
            logger.info(f"Verification SMS sent to {mobile}")
        else:
            raise Exception("Failed to send SMS")
    except Exception as e:
        logger.error(f"Error in send_verification_sms: {e}", exc_info=True)
        raise  # For Celery retry