suits = ['♠', '♥', '♦', '♣']
colors = ['black', 'red', 'red', 'black']
ranks = "A23456789TJQK"

class Card:
    """A card is not an agent itself, but it manages two agents
    which are always next to each other, representing
    the card as something like '♠A'.
    """
    display = False

    def __init__(self, position, index, hidden=False, selected=False):
        """When creating a card, you pass an index, which should be a number between
        0 and 51. If you imagine a deck of playing cards in order (all the spades from A-K, 
        then all the hearts from A-K, etc.), then the index is all we need to identify which
        card this is. See the CardSuit and CardRank classes below for the math we can use
        to convert an index value to a suit or a rank.
        """
        self.index = index
        self.name = str(index)
        self.agents = [CardSuit(index, hidden, selected), CardRank(index, hidden, selected)]
        self.set_position(position)

    def __str__(self):
        return ''.join(a.character for a in self.agents)

    def __repr__(self):
        return f"<Card {self.index} {self}>"

    def value(self):
        """Returns how many points this card is worth. Currently treats aces as worth 1. 
        Later we might need a way of considering that an ace could be worth 1 or 11 in 
        blackjack.
        """
        rank_index = self.index % 13
        return rank_index + 1

    def set_position(self, position):
        """When the Card's position gets set, it updates
        the position of its suit and rank. In this way, we have one 
        agent (Card) which manages the positions of two agents on the 
        screen.
        """
        x, y = position
        suit, rank = self.agents
        self.position = position
        suit.position = position
        rank.position = (x+1, y)

    def set_z(self, z):
        suit, rank = self.agents
        suit.z = z
        rank.z = z

    def hide(self):
        for agent in self.agents:
            agent.hide()

    def show(self):
        for agent in self.agents:
            agent.show()

    def select(self):
        for agent in self.agents:
            agent.select()

    def deselect(self):
        for agent in self.agents:
            agent.deselect()

class CardSuit:
    def __init__(self, index, hidden=False, selected=False):
        self.name = f"{index}_suit"
        self.index = index
        self.suit_color = colors[index // 13]
        self.hidden = hidden
        self.selected = selected
        self.update_display()

    def select(self):
        self.selected = True
        self.update_display()

    def deselect(self):
        self.selected = False
        self.update_display()

    def show(self):
        self.hidden = False
        self.update_display()

    def hide(self):
        self.hidden = True
        self.update_display()

    def update_display(self):
        if self.hidden:
            self.character = "▒"
            fg = "blue"
        else:
            self.character = suits[self.index //13]
            fg = self.suit_color
        if self.selected:
            bg = "yellow"
        else:
            bg = "gray"
        self.color = fg + "_on_" + bg

class CardRank:
    def __init__(self, index, hidden=False, selected=False):
        self.name = f"{index}_rank"
        self.index = index
        self.suit_color = colors[index // 13]
        self.hidden = hidden
        self.selected = selected
        self.update_display()

    def select(self):
        self.selected = True
        self.update_display()

    def deselect(self):
        self.selected = False
        self.update_display()

    def show(self):
        self.hidden = False
        self.update_display()

    def hide(self):
        self.hidden = True
        self.update_display()

    def update_display(self):
        if self.hidden:
            self.character = "▒"
            fg = "blue"
        else:
            self.character = ranks[self.index % 13]
            fg = self.suit_color
        if self.selected:
            bg = "yellow"
        else:
            bg = "gray"
        self.color = fg + "_on_" + bg