Solution

app/main.py

@@ -1,34 +1,127 @@
-class Deck:
-    def __init__(self, row, column, is_alive=True):
-        pass
+from __future__ import annotations
+
+
+class Cell:
+    def __init__(self, row: int, column: int, symbol: str = "~") -> None:
+        self.row = row
+        self.column = column
+        self.symbol = symbol
+
+
+class Deck(Cell):
+    def __init__(self, row: int, column: int, is_alive: bool = True) -> None:
+        super().__init__(row, column, "□")
+        self.is_alive = is_alive
 
 
 class Ship:
-    def __init__(self, start, end, is_drowned=False):
-        # Create decks and save them to a list `self.decks`
-        pass
+    def __init__(
+            self,
+            start: tuple,
+            end: tuple,
+            is_drowned: bool = False
+    ) -> None:
+        self.start = start
+        self.end = end
+        self.decks = self.create_decs(start, end)
+        self.is_drowned = is_drowned
+
+    def get_deck(self, row: int, column: int) -> Deck | None:
+        deck = [
+            deck for deck in self.decks
+            if deck.row == row and deck.column == column
+        ]
+        return deck[0] if deck else None
+
+    def fire(self, row: int, column: int) -> str:
+        if self.is_drowned:
+            return "The ship in this location already drowned"
+
+        deck = self.get_deck(row, column)
+        deck.is_alive = False
+        deck.symbol = "*"
+        return "Sunk!" if self.if_all_deck_is_damaged() else "Hit!"
+
+    def if_all_deck_is_damaged(self) -> bool:
+        if not any([deck.is_alive for deck in self.decks]):
+            self.is_drowned = True
+            for deck in self.decks:
+                deck.symbol = "x"
+            return True
+        return False
 
-    def get_deck(self, row, column):
-        # Find the corresponding deck in the list
-        pass
+    @staticmethod
+    def create_decs(start: tuple, end: tuple) -> list[Deck]:
+        list_of_decks = []
+        if start[0] == end[0]:
+            # ship located horizontally
+            ship_length = end[1] - start[1] + 1
+            for i in range(ship_length):
+                list_of_decks.append(Deck(start[0], start[1] + i))
+        else:
+            # ship located vertically
+            ship_length = end[0] - start[0] + 1
+            for i in range(ship_length):
+                list_of_decks.append(Deck(start[0] + i, start[1]))
 
-    def fire(self, row, column):
-        # Change the `is_alive` status of the deck
-        # And update the `is_drowned` value if it's needed
-        pass
+        return list_of_decks
+
+    @classmethod
+    def create_ship(cls, ship_cords: tuple) -> Ship:
+        return Ship(*ship_cords)
 
 
 class Battleship:
-    def __init__(self, ships):
-        # Create a dict `self.field`.
-        # Its keys are tuples - the coordinates of the non-empty cells,
-        # A value for each cell is a reference to the ship
-        # which is located in it
-        pass
-
-    def fire(self, location: tuple):
-        # This function should check whether the location
-        # is a key in the `self.field`
-        # If it is, then it should check if this cell is the last alive
-        # in the ship or not.
-        pass
+    def __init__(self, ships: list[tuple]) -> None:
+        self.field = self.create_empty_field()
+        self.ships = ships
+
+    @property
+    def ships(self) -> list[Ship]:
+        return self._ships
+
+    @ships.setter
+    def ships(self, ships: list[tuple]) -> None:
+        self._ships = [Ship.create_ship(cords) for cords in ships]
+        self.add_ships_to_the_field()
+
+    def fire(self, location: tuple) -> str:
+        try:
+            if not isinstance(self.field[location], Ship):
+                return "Miss!"
+            result = self.field[location].fire(*location)
+            # If you want to print field -> uncomment func() below
+            # self.print_field()
+            return result
+        except (TypeError, KeyError):
+            print(
+                f"Location {location} isn't correct. "
+                f"Must be in range (0-9, 0-9)"
+            )
+
+    def add_ships_to_the_field(self) -> None:
+        for ship in self.ships:
+            for deck in ship.decks:
+                self.field[(deck.row, deck.column)] = ship
+
+    def print_field(self) -> None:
+        for i, (cords, cell) in enumerate(self.field.items()):
+            if i % 10 == 0:
+                print()
+            print(self.get_symbol_from_cell(cords, cell), end="  ")
+        print("")
+
+    @staticmethod
+    def get_symbol_from_cell(cords: tuple[int, int], cell: Cell | Ship) -> str:
+        if isinstance(cell, Ship):
+            return cell.get_deck(cords[0], cords[1]).symbol
+        else:
+            return cell.symbol
+
+    @staticmethod
+    def create_empty_field() -> dict[tuple[int, int], Cell]:
+        return ({
+            (i, j): Cell(i, j)
+            for i in range(10)
+            for j in range(10)
+        })