oop

opp.py

class Building:
    # do not use magic words
    PLACE_OUT_OF_STOCK = 'Out of Stock'
    PLACE_REMOTE_WAREHOUSE = 'Remove Warehouse'

    # it's just an optimization
    __slots__ = ['_material', '_color', '_number', '_store_place', '_original_place']
    
    # lets make everything private
    def __init__(self, material: str, color: str, store_place: str, number: int=0):
        self._material = material or 'Undefined'
        self._color = color or "Underfined"
        self._store_place = self._original_place = store_place or "Undefined"
        self._number = number
        
        # Here is contaversial idea: quantity/number of the material should change object ste immidiatly    
        self.detect_place_to_store_materials()

    def __str__(self):
        return f"{self._store_place}:\n  material: {self._material}\n  color: {self._color}\n" \
               f"  quantity: {self._number}"

    # Adding validations.
    @property
    def number(self):
        return self._number

    # Here is contaversial idea: quantity/number of the material should change object ste immidiatly
    # Contaversial: cause we are breaking some SOLID rules, but in that "synthetic" case it looks like ok
    @number.setter
    def number(self, number: int):
        if not (isinstance(number, int) and number >= 0):
            raise ValueError("Positive numbers only")
        
        # yep, it's ok for logs in general
        if number > 100:
            print("Check warehouse capacity first")
        self._number = number
        self.detect_place_to_store_materials()

    # lets rename it a bit.
    def detect_place_to_store_materials(self):
        if self.number <= 0:
            self._store_place = Building.PLACE_OUT_OF_STOCK
        elif self.number >= 100:
            self._store_place = Building.PLACE_REMOTE_WAREHOUSE
        else:
            self._store_place = self._original_place

# Checking if everything works
building_east = Building("wood", "oak", "East Warehouse", 3)
print(building_east)

building_west = Building("plastic", "green", "West Warehouse", 200)
building_west.number += 100
building_west.number -= 250

# I prefer not allow to change some attributes directly. Yes, we can add setters for all attributes, but... dont makes sense, just use python "private" fields notation
# new_b._place = new_b.choose_place()
print(building_west)

south_building = Building("steel", "grey", "South Beach Area", 120)
print(south_building)
south_building.detect_place_to_store_materials()
print(south_building)

undef_building = south_building = Building(None, None, None, 0)
print(south_building)