import logging
from typing import Optional
from datetime import datetime, timedelta
from fastapi import APIRouter, HTTPException, Query, Depends, status, Body
from fastapi.responses import JSONResponse  
#from fastapi.security import OAuth2PasswordRequestForm, OAuth2PasswordBearer
#from jose import JWTError, jwt
from app.services.customer_services import get_otp_from_cache, validate_email_mobile, verify_otp_and_save_customer
from app.models.customer import CustomerRegister


# Initialize router and logger
router = APIRouter(prefix="/customer")
logger = logging.getLogger(__name__)



@router.post("/register")
async def register_customer(user: CustomerRegister = Body(...)):
    """
    API endpoint to register a new customer.

    Args:
        user (CustomerRegister): The details of the customer to register.

    Returns:
        dict: Confirmation message indicating email and SMS verification pending.
    """
    try:
        logger.info("Registering a new customer with email: %s and mobile: %s", user.email, user.mobile)

        # Validate email and mobile format
        validation_result = await validate_email_mobile(user.email, user.mobile)
        if validation_result["status"] == "error":
            logger.error("Validation failed: %s", validation_result["errors"])
            raise HTTPException(status_code=400, detail=validation_result["errors"])       

        return user.dict()

    except HTTPException as e:
        logger.error("Failed to register customer: %s", e.detail)
        raise e
    except Exception as e:
        logger.error("Unexpected error while registering customer: %s", e)
        raise HTTPException(status_code=500, detail="Failed to register customer") from e
    
@router.post("/otp/verify")
async def customer_otp_verification(user: CustomerRegister = Body(...)):
    """
    API endpoint to validate OTPs and save the complete customer object.

    Args:
        user (CustomerRegister): The complete customer object including email, mobile, and OTPs.

    Returns:
        dict: Confirmation message indicating success or failure.
    """
    try:
        logger.info("Verifying OTPs and registering customer with email: %s and mobile: %s", user.email, user.mobile)
         # Verify OTPs and save customer
        result = await verify_otp_and_save_customer(user)
        if result["status"] == "error":
            raise HTTPException(status_code=400, detail=result["errors"])

        return {"message": "Customer successfully registered and verified."}

    except HTTPException as e:
        logger.error("Failed to verify and register customer: %s", e.detail)
        raise e
    except Exception as e:
        logger.error("Unexpected error while verifying and registering customer: %s", e)
        raise HTTPException(status_code=500, detail="Failed to verify and register customer") from e

@router.get("/otp/get")
async def get_otps(key: str = Query(..., description="The email or mobile number to retrieve the OTP for")):
    """
    API endpoint to retrieve the email or SMS OTP from Redis cache.

    Args:
        key (str): The email or mobile number to retrieve the OTP for.

    Returns:
        dict: The OTP data if found, or an error message if not found.
    """
    try:
        logger.info("Retrieving OTP for key: %s", key)

        # Retrieve OTP from Redis
        otp_data = await get_otp_from_cache(key)
        if not otp_data:
            raise HTTPException(status_code=404, detail="OTP not found or expired")

        return {"key": key, "otp_data": otp_data}

    except HTTPException as e:
        logger.error("Failed to retrieve OTP for key %s: %s", key, e.detail)
        raise e
    except Exception as e:
        logger.error("Unexpected error while retrieving OTP for key %s: %s", key, e)
        raise HTTPException(status_code=500, detail="Failed to retrieve OTP") from e