#! /usr/bin/env python
# Rayito objects
# Copyright (C) 2011 Gabriel Eirea
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# Contact information:
# Gabriel Eirea geirea@gmail.com
# Ceibal Jam http://ceibaljam.org

import pygame

class RtoObject():
    """ Class for rayito objects.

    position: (x, y) of upper-left corner in pixels
    layer: layer number, high is up, low is down
    """

    def __init__(self, position, layer = 0):
        self._position = [position[0], position[1]]
        self._layer = layer
        self._visible = False
        self._moving = False
        self._velocity = (0, 0)
        self._last_update = 0

    def hide(self):
        self._visible = False

    def show(self):
        self._visible = True

    def move_to(self, newpos):
        self._position = [newpos[0], newpos[1]]

    def move_by(self, relpos):
        self._position[0] += relpos[0]
        self._position[1] += relpos[1]

    def change_layer(self, new_layer):
        self._layer = new_layer

    def get_layer(self):
        return self._layer

    def move_start(self, vel):
        # vel should be in pixels per millisecond
        self._moving = True
        self._velocity = vel

    def move_stop(self):
        self._moving = False

    def update(self, time):
        pixels_x =  int(self._velocity[0]*(time - self._last_update))
        pixels_y =  int(self._velocity[1]*(time - self._last_update))
        if self._moving:
            self._position[0] += pixels_x
            self._position[1] += pixels_y
        self._last_update = time
        self.update_specific(time)

    def update_specific(self, time):
        pass

    def render(self, screen):
        pass

    def is_pressed(self, pos):
        return False


class RtoImage(RtoObject):
    """ Class for rayito images.

    image: pygame surface with the image
    position: (x, y) of upper-left corner in pixels
    layer: layer number, high is up, low is down
    """

    def __init__(self, image, position, layer = 0):
        RtoObject.__init__(self, position, layer)
        self._image = image

    def scale_to(self, target_size):
        w = self._image.get_width()
        h = self._image.get_height()
        center = (self._position[0]+int(w/2), self._position[1]+int(h/2))
        tmp = pygame.transform.scale(self._image, target_size)
        wtmp = tmp.get_width()
        htmp = tmp.get_height()
        self._position = [center[0]-int(wtmp/2), center[1]-int(htmp/2)]
        self._image = tmp
        del tmp

    def scale_by(self, ratio):
        w = self._image.get_width()
        h = self._image.get_height()
        center = (self._position[0]+int(w/2), self._position[1]+int(h/2))
        tmp = pygame.transform.scale(self._image,
                          (int(self._image.get_width()*ratio),
                           int(self._image.get_height()*ratio)))
        wtmp = tmp.get_width()
        htmp = tmp.get_height()
        self._position = [center[0]-int(wtmp/2), center[1]-int(htmp/2)]
        self._image = tmp
        del tmp

    def flip_hor(self):
        tmp = pygame.transform.flip(self._image, True, False)
        self._image = tmp
        del tmp

    def flip_ver(self):
        tmp = pygame.transform.scale(self._image, False, True)
        self._image = tmp
        del tmp

    def rotate(self, angle):
        w = self._image.get_width()
        h = self._image.get_height()
        center = (self._position[0]+int(w/2), self._position[1]+int(h/2))
        tmp = pygame.transform.rotate(self._image, angle)
        wtmp = tmp.get_width()
        htmp = tmp.get_height()
        self._position = [center[0]-int(wtmp/2), center[1]-int(htmp/2)]
        self._image = tmp
        del tmp

    def render(self, screen):
        if self._visible:
            screen.blit(self._image,self._position)


class RtoDialog(RtoObject):
    """Class for rayito dialogs 

    text: list with text to display; 
          each element can have \n to separate lines
    font: pygame font to use
    bg_color: background color (R, G, B)
    fg_color: text color (R, G, B)
    position: (x, y) of upper-left corner in pixels
    layer: layer number, high is up, low is down
    """

    def __init__(self, text, font, bg_color, fg_color, position, layer = 0):
        RtoObject.__init__(self, position, layer)
        self._font = font
        self._text = text
        self._ntexts = len(text)
        self._current_text = 0
        self._bg_color = bg_color
        self._fg_color = fg_color
        # compute size
        self._width = 0
        self._height = 0
        for t in self._text:
            lines = t.split("\n")
            lh = 0
            for l in lines:
                (w, h) = self._font.size(l)
                if w > self._width:
                    self._width = w
                lh += h
            if lh > self._height:
                self._height = lh
        self._width += 10
        self._height += 10
        # create empty background
        self._bg = pygame.Surface((self._width, self._height))
        self._bg.fill(self._bg_color)
        # render first line of text
        self.next_text()

    def next_text(self):
        if self._current_text == self._ntexts:
            self.hide()
            return False
        self._image = self._bg.copy()
        yline = 5
        for l in self._text[self._current_text].split("\n"):
            text_img = self._font.render(l, 1, self._fg_color)
            textrect = text_img.get_rect()
            textrect.left = 5
            textrect.top = yline
            self._image.blit(text_img, textrect)
            yline += self._font.get_height()
        self._current_text += 1
        return True

    def render(self, screen):
        if self._visible:
            screen.blit(self._image, self._position)

    def restart(self):
        self._current_text = 0
        self.next_text()


class RtoButton(RtoObject):
    """Class for rayito buttons 

    text: text to display; can have \n to separate lines
    font: pygame font to use
    bg_color: background color (R, G, B)
    fg_color: text color (R, G, B)
    position: (x, y) of upper-left corner in pixels
    layer: layer number, high is up, low is down
    """

    def __init__(self, text, font, bg_color, fg_color, position, layer = 0):
        RtoObject.__init__(self, position, layer)
        self._font = font
        self._text = text
        self._bg_color = bg_color
        self._fg_color = fg_color
        # compute size
        self._width = 0
        self._height = 0
        lines = self._text.split("\n")
        for l in lines:
            (w, h) = self._font.size(l)
            if w > self._width:
                self._width = w
            self._height += h
        self._width += 10
        self._height += 10
        # create empty background
        self._image = pygame.Surface((self._width, self._height))
        self._image.fill(self._bg_color)
        yline = 5
        for l in self._text.split("\n"):
            text_img = self._font.render(l, 1, self._fg_color)
            textrect = text_img.get_rect()
            textrect.left = 5
            textrect.top = yline
            self._image.blit(text_img, textrect)
            yline += h

    def render(self, screen):
        if self._visible:
            screen.blit(self._image, self._position)

    def is_pressed(self, pos):
        if pos[0] > self._position[0] \
                and pos[0] < self._position[0] + self._width \
                and pos[1] > self._position[1] \
                and pos[1] < self._position[1] + self._height:
            return True
        else:
            return False


class RtoSprite(RtoObject):
    """Class for rayito sprites.

    images: list with sprite images (each one a pygame surface)
    frames: list with image# for every frame
    next_frames: list with next frame from current one
    dxs: list with dx for current frame (in pixels)
    dys: list with dy for current frame (in pixels)
    position: (x, y) of upper-left corner in pixels
    layer: layer number, high is up, low is down
    """

    def __init__(self, images, frames, next_frames, dxs, dys,
                 position, layer = 0):
        RtoObject.__init__(self, position, layer)
        self._images = images
        self._frames = frames
        self._next_frames = next_frames
        self._dxs = dxs
        self._dys = dys
        self._frame = 0
        self._image = self._images[self._frames[self._frame]]

    def update_specific(self, time):
        self._position[0] += self._dxs[self._frame]
        self._position[1] += self._dys[self._frame]
        self._frame = self._next_frames[self._frame]
        self._image = self._images[self._frames[self._frame]]
        self._last_update = time

    def render(self, screen):
        screen.blit(self._image, self._position)

    def update_frame(self, fr):
        self._frame = fr


class RtoSound():
    """Class for rayito sounds.

    sound: pygame.mixer.Sound object
    volume: volume (between 0 and 1)
    """

    def __init__(self, sound, volume = 1):
        self._sound = sound
        self._volume = volume

    def play(self):
        self._sound.play()
        
    def set_volume(self, vol):
        if vol >= 0 and vol <= 1:
            self._sound.set_volume(vol)

    def update(self, time):
        pass