from fastapi import APIRouter, Depends, HTTPException, status
from pydantic import BaseModel
import logging

from database_layer.base_db_handler import BaseDBHandler

# Set up logger
logger = logging.getLogger(__name__)

# Pydantic models for request/response validation
class UserSignup(BaseModel):
    username: str
    email: str
    password: str

class UserLogin(BaseModel):
    username: str
    password: str

class AuthResponse(BaseModel):
    success: bool
    message: str
    token: str = None

# Create router
router = APIRouter(
    prefix="/auth",
    tags=["authentication"],
)

# Dependency to get the database handler
async def get_db_handler() -> BaseDBHandler:
    # This will be implemented in main.py and passed to the router
    raise NotImplementedError("Database handler dependency not implemented")

@router.post("/signup", response_model=AuthResponse)
async def signup(user_data: UserSignup, db_handler: BaseDBHandler = Depends(get_db_handler)):
    """
    Register a new user in the system.
    """
    logger.info(f"Signup request for user: {user_data.username}")
    
    # For now, just return a dummy response
    return AuthResponse(
        success=True,
        message=f"User {user_data.username} created successfully",
        token="dummy_token"
    )

@router.post("/login", response_model=AuthResponse)
async def login(credentials: UserLogin, db_handler: BaseDBHandler = Depends(get_db_handler)):
    """
    Authenticate a user and return a token.
    """
    logger.info(f"Login attempt for user: {credentials.username}")
    
    # For now, just return a dummy response
    return AuthResponse(
        success=True,
        message=f"User {credentials.username} logged in successfully",
        token="dummy_token"
    ) 