from fastapi import APIRouter, Depends, HTTPException, status
from sqlalchemy.orm import Session

from app.crud.user import (
    create_user,
    delete_user,
    get_user,
    get_user_by_email,
    get_users,
    update_user,
)
from app.db.session import get_db
from app.schemas.user import User, UserCreate, UserUpdate

router = APIRouter()

@router.get("/", response_model=list[User])
def read_users(skip: int = 0, limit: int = 100, db: Session = Depends(get_db)):
    """Get all users with pagination"""
    users = get_users(db, skip=skip, limit=limit)
    return users

@router.get("/{user_id}", response_model=User)
def read_user(user_id: int, db: Session = Depends(get_db)):
    """Get a specific user by ID"""
    db_user = get_user(db, user_id=user_id)
    if db_user is None:
        raise HTTPException(status_code=404, detail="User not found")
    return db_user

@router.post("/", response_model=User, status_code=status.HTTP_201_CREATED)
def create_user_endpoint(user: UserCreate, db: Session = Depends(get_db)):
    """Create a new user"""
    db_user = get_user_by_email(db, email=user.email)
    if db_user:
        raise HTTPException(status_code=400, detail="Email already registered")
    return create_user(db=db, user=user)

@router.put("/{user_id}", response_model=User)
def update_user_endpoint(user_id: int, user_update: UserUpdate, db: Session = Depends(get_db)):
    """Update an existing user"""
    db_user = update_user(db, user_id=user_id, user_update=user_update)
    if db_user is None:
        raise HTTPException(status_code=404, detail="User not found")
    return db_user

@router.delete("/{user_id}")
def delete_user_endpoint(user_id: int, db: Session = Depends(get_db)):
    """Delete a user"""
    success = delete_user(db, user_id=user_id)
    if not success:
        raise HTTPException(status_code=404, detail="User not found")
    return {"message": "User deleted successfully"}