from typing import List, Optional, Dict, Any
from uuid import UUID
from sqlalchemy.orm import Session

from models.fruit import Fruit
from schemas.fruit import FruitCreate, FruitUpdate

def get_all_fruits(db: Session, include_inactive: bool = False) -> List[Fruit]:
    """
    Retrieves all fruits from the database.

    Args:
        db (Session): The database session.
        include_inactive (bool): Whether to include inactive fruits.

    Returns:
        List[Fruit]: A list of all fruit objects.
    """
    query = db.query(Fruit)
    if not include_inactive:
        query = query.filter(Fruit.is_active.is_(True))
    return query.all()

def get_fruit_by_id(db: Session, fruit_id: UUID) -> Optional[Fruit]:
    """
    Retrieves a single fruit by its ID.

    Args:
        db (Session): The database session.
        fruit_id (UUID): The ID of the fruit to retrieve.

    Returns:
        Optional[Fruit]: The fruit object if found, otherwise None.
    """
    return db.query(Fruit).filter(Fruit.id == fruit_id).first()

def get_fruit_by_name(db: Session, name: str) -> Optional[Fruit]:
    """
    Retrieves a single fruit by its name.

    Args:
        db (Session): The database session.
        name (str): The name of the fruit to retrieve.

    Returns:
        Optional[Fruit]: The fruit object if found, otherwise None.
    """
    return db.query(Fruit).filter(Fruit.name == name).first()

def create_fruit(db: Session, fruit_data: FruitCreate) -> Fruit:
    """
    Creates a new fruit in the database.

    Args:
        db (Session): The database session.
        fruit_data (FruitCreate): The data for the fruit to create.

    Returns:
        Fruit: The newly created fruit object.
    """
    db_fruit = Fruit(**fruit_data.dict())
    db.add(db_fruit)
    db.commit()
    db.refresh(db_fruit)
    return db_fruit

def update_fruit(db: Session, fruit_id: UUID, fruit_data: FruitUpdate) -> Optional[Fruit]:
    """
    Updates an existing fruit in the database.

    Args:
        db (Session): The database session.
        fruit_id (UUID): The ID of the fruit to update.
        fruit_data (FruitUpdate): The data to update the fruit with.

    Returns:
        Optional[Fruit]: The updated fruit object if found, otherwise None.
    """
    db_fruit = get_fruit_by_id(db, fruit_id)
    if not db_fruit:
        return None
    
    update_data = fruit_data.dict(exclude_unset=True)
    for field, value in update_data.items():
        setattr(db_fruit, field, value)
    
    db.commit()
    db.refresh(db_fruit)
    return db_fruit

def delete_fruit(db: Session, fruit_id: UUID) -> bool:
    """
    Deletes a fruit from the database.

    Args:
        db (Session): The database session.
        fruit_id (UUID): The ID of the fruit to delete.

    Returns:
        bool: True if the fruit was deleted, False if not found.
    """
    db_fruit = get_fruit_by_id(db, fruit_id)
    if not db_fruit:
        return False
    
    db.delete(db_fruit)
    db.commit()
    return True

def soft_delete_fruit(db: Session, fruit_id: UUID) -> bool:
    """
    Soft deletes a fruit by setting is_active to False.

    Args:
        db (Session): The database session.
        fruit_id (UUID): The ID of the fruit to soft delete.

    Returns:
        bool: True if the fruit was soft deleted, False if not found.
    """
    db_fruit = get_fruit_by_id(db, fruit_id)
    if not db_fruit:
        return False
    
    db_fruit.is_active = False
    db.commit()
    return True

def validate_fruit_data(data: Dict[str, Any]) -> bool:
    """
    Validates fruit input data dictionary.

    Args:
        data (Dict[str, Any]): The input data to validate.

    Returns:
        bool: True if the data is valid, False otherwise.
    """
    if not data:
        return False
    if "name" not in data or not isinstance(data["name"], str) or len(data["name"]) < 1:
        return False
    if "description" in data and not isinstance(data["description"], (str, type(None))):
        return False
    if "is_active" in data and not isinstance(data["is_active"], bool):
        return False
    return True