# Creating a new user in the database
from math import ceil
from sqlalchemy.orm import Session

from schemas.user import OutputUser, UserCreate, DriverCreate
from db.models.user import User
from core.hashing import Hasher
from db.models.drivetask import DriveTask


def create_new_user(user: UserCreate, db: Session):
    if get_user_by_email(user.Email, db):
        return "userExists"
    user_object = User(
        Email=user.Email,
        Name=user.Name,
        MiddleName=user.MiddleName,
        LastName=user.LastName,
        GovernmentId=user.GovernmentId,
        Address=user.Address,
        ContactNumber=user.ContactNumber,
        Role=user.Role,
        HashedPassword=Hasher.get_password_hash(user.Password),
    )
    db.add(user_object)
    db.commit()
    db.refresh(user_object)
    return user_object


def create_new_driver(driver: DriverCreate, db: Session):
    if get_user_by_email(driver.Email, db):
        return "userExists"
    driver_object = User(
        Email=driver.Email,
        Name=driver.Name,
        MiddleName=driver.MiddleName,
        LastName=driver.LastName,
        GovernmentId=driver.GovernmentId,
        Address=driver.Address,
        ContactNumber=driver.ContactNumber,
        Role="Driver",
        HashedPassword=Hasher.get_password_hash(driver.Password),
        DrivingLicenseNumber=driver.DrivingLicenseNumber,
    )
    db.add(driver_object)
    db.commit()
    db.refresh(driver_object)
    return driver_object


def get_user_by_id(user_id: int, role: str, db: Session):
    user = db.query(User).filter(User.Id == user_id).first()
    if not user:
        return False
    if user.Role != role and role != "Any":
        return False
    return user


def get_user_by_email(email: str, db: Session):
    user = db.query(User).filter(User.Email == email).first()
    return user


def get_user_by_phone(phone: str, db: Session):
    user = db.query(User).filter(User.ContactNumber == phone).first()
    return user


def verify_driver_exists(driver_id: int, db: Session):
    driver = db.query(User).filter(User.Id == driver_id).first()
    if not driver:
        return False
    if driver.Role != "Driver":
        return False
    return True


def get_car_driver(vehicle_id: int, db: Session):
    driver = db.query(User).filter(User.AssignedVehicle == vehicle_id).first()
    if not driver:
        return False
    return driver


def list_users(db: Session, role: str = "Any"):
    users = db.query(User).filter((User.Role == role) | (role == "Any")).all()
    return users


def get_users_by_name(
    db: Session, name: str = "", role: str = None, page: int = 1, per_page: int = 20
):
    if role == "Admin":
        return None
    if role is None:
        users = db.query(User).filter(User.Name.like(f"{name}%"), User.Role != "Admin")
    else:
        users = db.query(User).filter(User.Name.like(f"{name}%"), User.Role == role)
    users = users.offset((page - 1) * per_page).limit(per_page).all()
    return users


def replace_user_data(user_id: int, user_data: UserCreate, db: Session):
    user = db.query(User).filter(User.Id == user_id).first()
    if not user:
        return "userNotFound"
    user.Email = user_data.Email
    user.Name = user_data.Name
    user.MiddleName = user_data.MiddleName
    user.LastName = user_data.LastName
    user.GovernmentId = user_data.GovernmentId
    user.Address = user_data.Address
    user.ContactNumber = user_data.ContactNumber
    user.Role = user_data.Role
    user.HashedPassword = Hasher.get_password_hash(user_data.Password)
    db.commit()
    db.refresh(user)
    return user


def delete_user_data(id: int, db: Session):
    user = db.query(User).filter(User.Id == id).first()
    if not user:
        return "userNotFound"
    drivetasks = db.query(DriveTask).filter(DriveTask.DriverId == id).all()
    for task in drivetasks:  # delete all tasks assigned to this user
        db.delete(task)
    db.delete(user)
    db.commit()
    return "userDeleted"


def user_search_query(
    db: Session, name: str = "", role: str = None, page: int = 1, per_page: int = 20
):
    if name == "" or name is None:
        query = db.query(User)
    else:
        query = db.query(User).filter(User.Name.like(f"{name}%"))
    if role is not None and role != "Admin":
        query = query.filter(User.Role == role)
    total_users = query.count()
    total_pages = ceil(total_users / per_page)
    users = query.offset((page - 1) * per_page).limit(per_page).all()

    output_users = [
        OutputUser(
            id=user.Id,
            Name=user.Name,
            MiddleName=user.MiddleName,
            LastName=user.LastName,
            ContactNumber=user.ContactNumber,
            Address=user.Address,
            Email=user.Email,
            Role=user.Role,
            AssignedVehicle=None,
        )
        for user in users
    ]

    return {"users": output_users, "total_pages": total_pages}