import pandas as pd

from datetime import datetime
from fastapi.responses import JSONResponse
from fastapi import APIRouter, HTTPException, status
from typing import Literal
from src.users.users import get_user, hash_password, verify_password
from src.middlewares.logging import get_logger
from pydantic import BaseModel


class ILogin(BaseModel):
    """Login request model."""
    email: str
    password: str


logger = get_logger("users service")

router = APIRouter(
    prefix="/api",
    tags=["Users"],
)

from typing import Optional, Literal

@router.post(
    "/login",
    # response_model=IUserProfile,
    summary="Login by email and password",
    description="💡Authenticates a user with email and password (non hashed) from frontend and returns user data if successful."
)
async def login(payload: ILogin):
    """
    Authenticates a user and returns their data if credentials are valid.
    """
    try:
        user_profile:dict | None= await get_user(payload.email)
    except Exception as E:
        print(f"❌ login error while fetching user: {E}")
        # Return generic 500 to client
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail="Internal server error"
        )
    
    if not user_profile:
        # 404 or 401 – choose based on your security policy
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="Email not found"
        )

    if user_profile.get("status") == "inactive":
        raise HTTPException(
            status_code=status.HTTP_403_FORBIDDEN,
            detail="Account is inactive"
        )

    is_verified = verify_password(
        password=payload.password,
        hashed_password=user_profile.get("password")
    )

    if not is_verified:
        raise HTTPException(
            status_code=status.HTTP_401_UNAUTHORIZED,
            detail="Email or password invalid"
        )

    user_profile.pop("password", None)

    return {
        "status": "success",
        "message": "success",
        "data": user_profile,
    }