# -*- coding: utf-8 -*-

import pygame
font_path = 'assets/fonts/'

class CLabel(pygame.sprite.Sprite):
    """ a basic label 
        properties: 
            font: font to use
            text: text to display
            fgColor: foreground color
            bgColor: background color
            center: position of label's center
            size: (width, height) of label
    """
    
    def __init__(self, fontName = "DejaVuSans.ttf", transparent=False):
        pygame.sprite.Sprite.__init__(self)
        self.font = pygame.font.Font(font_path + fontName, 20)
        self.text = ""
        self.fgColor = (0x00, 0x00, 0x00)
        self.bgColor = (0xFF, 0xFF, 0xFF)
        self.transparent = transparent
        self.center = (0, 0)
        self.size = (0, 0)
    
    def set_font(self, fontName = "DejaVuSans.ttf", fontSize= 20):
        self.font = pygame.font.Font(font_path + fontName, fontSize)
        self._update_image()
        
    def set_center(self, aCenter):
        self.center = aCenter
        
    def set_size(self, aSize):
        self.size = aSize
        self._update_image()
        
    def set_fgColor(self, afgColor):
        if not(self.fgColor == afgColor):
            self.fgColor = afgColor
            self._update_image()
        
    def set_bgColor(self, abgColor):
        if not(self.bgColor == abgColor):
            self.bgColor = abgColor
            self._update_image()
        
    def set_text(self, aText):
        self.text = aText
        self._update_image()
        
    def _update_image(self):
        self.image = pygame.Surface(self.size)
        self.image.fill(self.bgColor)
        if self.transparent:
            self.image.set_colorkey(self.bgColor)
            fontSurface = self.font.render(self.text, True, self.fgColor)
        else:
            fontSurface = self.font.render(self.text, True, self.fgColor, self.bgColor)
        #center the text
        xPos = (self.image.get_width() - fontSurface.get_width())/2
        self.image.blit(fontSurface, (xPos, 0))
        self.update()

    def update(self):        
        self.rect = self.image.get_rect()
        self.rect.center = self.center
        
    def destroy(self):
        self.font = None
        self.image = None