from app.modules.user.user_repository import UserRepository
from app.modules.user.user_model import UserModel
import hashlib


class UserService:
    def __init__(self):
        self.repo = UserRepository()

    async def register_user(self, phone: str,  password: str):

        # check user already exists
        existing_user = await self.repo.find_by_phone(phone)
        if existing_user:
            return {"error": "User already exists"}

        # hash password (IMPORTANT)
        hashed_password = hashlib.sha256(password.encode()).hexdigest()

        user = UserModel(
            phone=phone,
            password=hashed_password
        )

        userData = await self.repo.create_user(user)

        return userData
    async def get_user_by_phone(self,phone:str):
        return await self.repo.find_by_phone(phone)
    
    async def login_user(self, phone: str, password: str):

        user = await self.repo.find_by_phone(phone)

        if not user:
            return {
                "success": False,
                "message": "User not found"
            }

        hashed_password = hashlib.sha256(
            password.encode()
        ).hexdigest()

        if user["password"] != hashed_password:
            return {
                "success": False,
                "message": "Invalid password"
            }

        return {
            "success": True,
            "user": user
        }