Develop

app/main.py

@@ -1,34 +1,100 @@
 class Deck:
-    def __init__(self, row, column, is_alive=True):
-        pass
+    def __init__(
+            self, row: int,
+            column: int,
+            is_alive: bool = True,
+            is_hit: bool = False
+    ) -> None:
+        self.row = row
+        self.column = column
+        self.is_alive = is_alive
+        self.is_hit = is_hit
 
 
 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: int, end: int, is_drowned: bool = False) -> None:
+        self.start = start
+        self.end = end
+        self.is_drowned = is_drowned
+        self.decks = [
+            Deck(row, column)
+            for row in range(start[0], end[0] + 1)
+            for column in range(start[1], end[1] + 1)
+        ]
 
-    def get_deck(self, row, column):
-        # Find the corresponding deck in the list
-        pass
+    def get_deck(self, row: int, column: int) -> Deck:
+        for deck in self.decks:
+            if deck.row == row and deck.column == column:
+                return deck
 
-    def fire(self, row, column):
-        # Change the `is_alive` status of the deck
-        # And update the `is_drowned` value if it's needed
-        pass
+    def fire(self, row: int, column: int) -> None:
+        deck = self.get_deck(row, column)
+        if deck:
+            deck.is_alive = False
+            deck.is_hit = True
+            if all(not d.is_alive for d in self.decks):
+                self.is_drowned = True
 
 
 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.ships = ships
+        self._validate_field()
+
+        for location in ships:
+            ship = Ship(location[0], location[1])
+            for row in range(location[0][0], location[1][0] + 1):
+                for column in range(location[0][1], location[1][1] + 1):
+                    self.field[(row, column)] = ship
+
+    def fire(self, location: tuple) -> str:
+        if location not in self.field:
+            return "Miss!"
+
+        ship = self.field[location]
+        ship.fire(location[0], location[1])
+
+        if ship.is_drowned:
+            return "Sunk!"
+        return "Hit!"
+
+    def print_field(self) -> None:
+        for row in range(10):
+            for col in range(10):
+                if (row, col) not in self.field:
+                    print("~", end=" ")
+                ship = self.field.get((row, col))
+                if ship:
+                    if ship.is_drowned:
+                        print("x", end=" ")
+                    deck = ship.get_deck(row, col)
+                    if deck.is_alive:
+                        print("\u25A1", end=" ")
+                    elif deck.is_hit and not ship.is_drowned:
+                        print("*", end=" ")
+            print()
+
+    def _validate_field(self) -> None:
+        total_ships = len(self.ships)
+        single_deck = double_deck = triple_deck = quadruple_deck = 0
+
+        for start, end in self.ships:
+            rows = set(range(start[0], end[0] + 1))
+            cols = set(range(start[1], end[1] + 1))
+
+            if len(rows) == 1 and len(cols) == 1:
+                single_deck += 1
+            elif len(rows) == 2 or len(cols) == 2:
+                double_deck += 1
+            elif len(rows) == 3 or len(cols) == 3:
+                triple_deck += 1
+            elif len(rows) == 4 or len(cols) == 4:
+                quadruple_deck += 1
+
+        if (total_ships != 10
+                or single_deck != 4
+                or double_deck != 3
+                or triple_deck != 2
+                or quadruple_deck != 1):
+            raise ValueError("Invalid ship placement!")