# -*- coding: utf-8 -*-
"""
bande qui compose le clavier minwii

$Id$
$URL$
"""
import pygame
from math import floor
import minwii.gradients as gradients
from minwii.globals import BACKGROUND_LAYER
from minwii.globals import FOREGROUND_LAYER
from minwii.globals import hls_to_rgba_8bits
from minwii.config import OFF_LUMINANCE
from minwii.config import OFF_SATURATION
from minwii.config import ON_TOP_LUMINANCE
from minwii.config import ON_BOTTOM_LUMINANCE
from minwii.config import ON_SATURATION
from minwii.config import ON_COLUMN_OVERSIZING
from minwii.config import ON_COLUMN_ALPHA
from minwii.config import LYRICS_FONT, NOTES_FONT
from minwii.config import FONT_COLOR
import minwii.events as events


class Column(pygame.sprite.DirtySprite) :
    ''' colonne utilisée pour l'affichage d'une touche du clavier de jeu.
    '''
    
    def __init__(self, group, index, hue, rect, tone, displayNote=True) :
        pygame.sprite.DirtySprite.__init__(self, group)
        self.index = index
        self.state = False
        
        # nom de l'intonation
        self.tone = tone
        toneName = NOTES_FONT.render(tone.nom, True, FONT_COLOR)
        
        # état off : surface unie et nom de l'intonation
        sur = pygame.surface.Surface(rect.size)
        rgba = hls_to_rgba_8bits(hue, OFF_LUMINANCE, OFF_SATURATION)
        sur.fill(rgba)
        w, h = rect.w, rect.h
        tw, th, = toneName.get_size()
        toneRect = pygame.Rect(((w - tw) / 2, h - th), (tw, th))
        if displayNote :
            sur.blit(toneName, toneRect)
        self.surOff = sur
        self.rectOff = rect
        
        
        # état on : surface dégradée avec nom de la note avec largeur agrandie
        topRgba = hls_to_rgba_8bits(hue, ON_TOP_LUMINANCE, ON_SATURATION, ON_COLUMN_ALPHA)
        bottomRgba = hls_to_rgba_8bits(hue, ON_BOTTOM_LUMINANCE, ON_SATURATION, ON_COLUMN_ALPHA)
        onWidth = rect.width * ON_COLUMN_OVERSIZING
        onLeft = rect.centerx - onWidth / 2
        rectOn = pygame.Rect((onLeft, 0),
                             (onWidth, rect.height))
        self.surOn = gradients.vertical(rectOn.size, topRgba, bottomRgba)
        w, h = rectOn.w, rectOn.h
        toneRect = pygame.Rect(((w - tw) / 2, h - th), (tw, th))
        if displayNote :
            self.surOn.blit(toneName, toneRect)
        self.rectOn = rectOn
        
        self.image = self.surOff
        self.rect = rect
    
    def update(self, state, syllabus='') :
        group = self.groups()[0]
        if state == self.state :
            # no changes
            return
        if state :
            group.change_layer(self, FOREGROUND_LAYER)
            sur = self.surOn
            rect = self.rectOn
            if syllabus :
                sur = sur.copy()
                renderedSyl = LYRICS_FONT.render(syllabus, True, FONT_COLOR)
                sw, sh, = renderedSyl.get_size()
                w, h = self.rectOn.w, self.rectOn.h

                if sw > self.rectOn.w :
                    sur = pygame.transform.scale(sur, (sw, h))
                    rect = rect.inflate(sw - w, 0)
                    w = sw
                
                screenWidth = group.dispWidth
                if rect.left < 0 :
                    rect.left = 0
                elif rect.right > screenWidth :
                    rect.right = screenWidth

                sylRect = pygame.Rect(((w - sw) / 2, (h - sh) / 2), (sw, sh))
                sur.blit(renderedSyl, sylRect)
                
            self.image = sur
            self.rect = rect
        else :
            group.change_layer(self, BACKGROUND_LAYER)
            self.image = self.surOff
            self.rect = self.rectOff

        self.state = state
        self.dirty = 1

        evt = pygame.event.Event(events.COLSTATECHANGE, column=self, state=state, syllabus=syllabus)
        pygame.event.post(evt)