from fastapi import APIRouter, Depends, HTTPException
from core.auth import get_current_user_dummy
from core.database import fake_users_db

router = APIRouter()

@router.post("/users/update")
async def update_profile(
    current_user: dict = Depends(get_current_user_dummy),
    username: str = None,
    email: str = None,
    bio: str = None
):
    """Update user profile information"""
    if current_user["username"] not in fake_users_db:
        raise HTTPException(status_code=404, detail="User not found")
    
    user_data = fake_users_db[current_user["username"]]
    
    if username and username != current_user["username"]:
        if username in fake_users_db:
            raise HTTPException(status_code=400, detail="Username already taken")
        fake_users_db[username] = user_data
        del fake_users_db[current_user["username"]]
        current_user["username"] = username
    
    if email:
        user_data["email"] = email
    
    if bio:
        user_data["bio"] = bio
    
    return {
        "message": "Profile updated successfully",
        "user": {
            "username": current_user["username"],
            "email": user_data["email"],
            "bio": user_data.get("bio", ""),
        },
        "metadata": {
            "updated_fields": [
                field for field in ["username", "email", "bio"]
                if locals()[field] is not None
            ]
        }
    }