from fastapi import APIRouter, Depends, HTTPException
from sqlalchemy.orm import Session
from typing import List
from app.db.session import get_db
from app.models.user import User
from app.schemas.user import User as UserSchema, UserCreate, UserUpdate

router = APIRouter()


def get_password_hash(password: str) -> str:
    return f"hashed_{password}"


@router.get("/", response_model=List[UserSchema])
def get_users(skip: int = 0, limit: int = 100, db: Session = Depends(get_db)):
    users = db.query(User).offset(skip).limit(limit).all()
    return users


@router.get("/{user_id}", response_model=UserSchema)
def get_user(user_id: int, db: Session = Depends(get_db)):
    user = db.query(User).filter(User.id == user_id).first()
    if user is None:
        raise HTTPException(status_code=404, detail="User not found")
    return user


@router.post("/", response_model=UserSchema)
def create_user(user: UserCreate, db: Session = Depends(get_db)):
    db_user = db.query(User).filter(User.email == user.email).first()
    if db_user:
        raise HTTPException(status_code=400, detail="Email already registered")

    hashed_password = get_password_hash(user.password)
    db_user = User(
        email=user.email, full_name=user.full_name, hashed_password=hashed_password
    )
    db.add(db_user)
    db.commit()
    db.refresh(db_user)
    return db_user


@router.put("/{user_id}", response_model=UserSchema)
def update_user(user_id: int, user: UserUpdate, db: Session = Depends(get_db)):
    db_user = db.query(User).filter(User.id == user_id).first()
    if db_user is None:
        raise HTTPException(status_code=404, detail="User not found")

    update_data = user.dict(exclude_unset=True)
    if "password" in update_data:
        update_data["hashed_password"] = get_password_hash(update_data.pop("password"))

    for field, value in update_data.items():
        setattr(db_user, field, value)

    db.commit()
    db.refresh(db_user)
    return db_user