main.py

from kivy.app import App
from kivy.core.window import Window
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy.lang import Builder
from random import choice

__author__ = "Dhya El Bahri"


class Player:
    choices: tuple = ('Rock', 'Paper', 'Scissors')
    beats: dict = {'Rock': 'Scissors', 'Scissors': 'Paper', 'Paper': 'Rock'}

    def __init__(self, name: str):
        self.name: str = name  # Either "user" or "computer"
        self.move: str = ''
        self.score: int = 0


class Game:
    def __init__(self):
        self.user = Player("user")
        self.computer = Player("computer")

    def is_winner(self):
        """Returns the winning Player, None if there's a tie"""
        if Player.beats[self.user.move] == self.computer.move:
            return self.user
        if Player.beats[self.computer.move] == self.user.move:
            return self.computer
        return None
    
    def play(self, selected_move: str, *args, **kwargs):
        """How we go about playing the game
           Oh, and this function returns a 3-tuple:
           (self.user.score, self.computer.score, message)
           'message' can be "You win!", "You lose!" or "Tie"
        """
        self.user.move = selected_move
        self.computer.move = choice(Player.choices)
        if self.is_winner() == self.user:
            self.user.score += 1
            return (self.user.score, self.computer.score, "You win!")
        elif self.is_winner() == self.computer:
            self.computer.score += 1
            return (self.user.score, self.computer.score, "You lose")
        else:
            return (self.user.score, self.computer.score, "Tie")


game = Game()


Builder.load_string("""
<StartWindow>:
    BoxLayout:
        orientation: "vertical"
        size: root.width, root.height
        Label:
            text: "Rock Paper Scissors"
            font_size: 22
            size_hint: .1, .1
            pos_hint: {"center_x": .5}
            color: "#03C04A"
            bold: True
        Image:
            source: "img/logo.png"
            pos_hint: {"center_x": .5, "center_y": .5}
        Button:
            text: "Start"
            size_hint: None, None
            width: 200
            height: 100
            pos_hint: {"center_x": .5}
            background_color: "#03C04A"
            bold: True
            background_normal: ""
            font_size: 18
            on_release: app.root.current = "game"
<GameWindow>:
    BoxLayout:
        orientation: "vertical"
        size: root.width, root.height
        Button:
            background_normal: ""
            background_down: ""
            pos_hint: {"x": 0, "y": 0}
            size_hint: None, None
            height: 50
            width: 50
            on_release: app.root.current = "start"
            Image:
                source: "img/back.png"
                center_x: self.parent.center_x
                center_y: self.parent.center_y
        BoxLayout:
            orientation: "horizontal"
            size_hint: 1, .25
            Label:
                id: "score_user"
                text: "You: 0"
                color: "#000000"
                font_size: 20
            Label:
                id: "score_computer"
                text: "Computer: 0"
                color: "#000000"
                font_size: 20
        Label:
            id: "console"
            text: "Make a move"
            color: "#000000"
            font_size: 20
            pos_hint: {"center_x": .5, "center_y": .5}
        AnchorLayout:
            anchor_x: "center"
            anchor_y: "bottom"
            padding: 20
            BoxLayout:
                orientation: "horizontal"
                size_hint: None, None
                width: 300
                height: 100
                Button:
                    size_hint: None, None
                    width: 100
                    height: 100
                    background_color: 1, 1, 1, 1
                    background_normal: ""
                    background_down: ""
                    on_press: root.rock_on()
                    on_release: root.rock_off()
                    Image:
                        id: "rock"
                        source: "img/rock.png"
                        center_x: self.parent.center_x
                        center_y: self.parent.center_y
                Button:
                    size_hint: None, None
                    width: 100
                    height: 100
                    background_color: 1, 1, 1, 1
                    background_normal: ""
                    background_down: ""
                    on_press: root.paper_on()
                    on_release: root.paper_off()
                    allow_stretch: False
                    Image:
                        id: "paper"
                        source: "img/paper.png"
                        center_x: self.parent.center_x
                        center_y: self.parent.center_y
                Button:
                    size_hint: None, None
                    width: 100
                    height: 100
                    background_color: 1, 1, 1, 1
                    background_normal: ""
                    background_down: ""
                    on_press: root.scissors_on()
                    on_release: root.scissors_off()
                    Image:
                        id: "scissors"
                        source: "img/scissors.png"
                        center_x: self.parent.center_x
                        center_y: self.parent.center_y
""")


class StartWindow(Screen):
    """The start screen"""
    pass


class GameWindow(Screen):
    """The actual game screen"""
    global game

    def rock_on(self):
        self.ids['"rock"'].source = "img/rock_pressed.png"

    def rock_off(self, *args, **kwargs):
        self.ids['"rock"'].source = "img/rock.png"
        temp = game.play('Rock')
        self.ids['"score_user"'].text = "You: " + str(temp[0])
        self.ids['"score_computer"'].text = "Computer: " + str(temp[1])
        self.ids['"console"'].text = f"You played 'Rock'\nComputer played '{game.computer.move}'\n{temp[2]}"
    
    def paper_on(self):
        self.ids['"paper"'].source = "img/paper_pressed.png"

    def paper_off(self, *args, **kwargs):
        self.ids['"paper"'].source = "img/paper.png"
        temp = game.play('Paper')
        self.ids['"score_user"'].text = "You: " + str(temp[0])
        self.ids['"score_computer"'].text = "Computer: " + str(temp[1])
        self.ids['"console"'].text = f"You played 'Paper'\nComputer played '{game.computer.move}'\n{temp[2]}"
    
    def scissors_on(self):
        self.ids['"scissors"'].source = "img/scissors_pressed.png"
   
    def scissors_off(self, *args, **kwargs):
        self.ids['"scissors"'].source = "img/scissors.png"
        temp = game.play('Scissors')
        self.ids['"score_user"'].text = "You: " + str(temp[0])
        self.ids['"score_computer"'].text = "Computer: " + str(temp[1])
        self.ids['"console"'].text = f"You played 'Scissors'\nComputer played '{game.computer.move}'\n{temp[2]}"


class PlayGame(App):   
    def build(self):
        """The application we're running"""
        Window.clearcolor = (1, 1, 1, 1)
        screen_manager = ScreenManager()
        screen = Screen(name="start")
        self.start_screen = StartWindow()
        screen.add_widget(self.start_screen)
        screen_manager.add_widget(screen)
        self.start_screen.size_hint = (.6, .9)
        self.start_screen.pos_hint = {"center_x": .5, "center_y": .5}
        screen = Screen(name="game")
        self.game_screen = GameWindow()
        screen.add_widget(self.game_screen)
        screen_manager.add_widget(screen)
        return screen_manager


if __name__ == "__main__":
    PlayGame().run()