import os
from tempfile import NamedTemporaryFile

from PIL import Image, ImageDraw

class Config:

    def __init__(self):
        if os.path.exists('/usr/share/fonts/source-pro/'):
            self.fnt_R_path = "/usr/share/fonts/source-pro/SourceSansPro-Regular.otf"
            self.fnt_RI_path = "/usr/share/fonts/source-pro/SourceSansPro-It.otf"
            self.fnt_RB_path = "/usr/share/fonts/source-pro/SourceSansPro-Bold.otf"
        elif os.path.exists('/usr/share/fonts/libertine'):
            self.fnt_R_path = "/usr/share/fonts/libertine/LinBiolinum_Rah.ttf"
            self.fnt_RI_path = "/usr/share/fonts/libertine/LinBiolinum_RIah.ttf"
            self.fnt_RB_path = "/usr/share/fonts/libertine/LinBiolinum_RBah.ttf"
        else:
            self.fnt_R_path = "/usr/share/fonts/TTF/LinBiolinum_Rah.ttf"
            self.fnt_RI_path = "/usr/share/fonts/TTF/LinBiolinum_RIah.ttf"
            self.fnt_RB_path = "/usr/share/fonts/TTF/LinBiolinum_RBah.ttf"

        self.css_overlay = NamedTemporaryFile()
        with open(self.css_overlay.name, 'w') as f:
            f.write('''
{{ id }} .bound {
    font-size: 0.9em;
}
{{ id }} .gauge path {
    fill-opacity: 1 !important;
}
{{ id }} .series .line {
    stroke-width: 2 !important;
}
{{ id }} .x .guides .line {
    stroke-width: 0 !important;
}
{{ id }} .y .guides .line {
    stroke: #555;
    stroke-width: 0.7;
}
{{ id }} .y .guides .line.axis {
    stroke: #000;
    stroke-width: 1;
}
            ''')

        import pygal
        self.pygal_config = pygal.Config()
        self.pygal_config.css.append('file://' + self.css_overlay.name)

        from pygal.style import Style
        self.pygal_custom_style = Style(
            background='white',
            foreground='black',
            font_family='Source Code Pro',
            gauge_background="red",
            colors=('#000', '#777'))

        self.charts_opts = {'style': self.pygal_custom_style, 'show_legend': False, 'margin_right': 7, 'margin_left': 2, 'margin_bottom': 4, 'margin_top': 1}

class RuleModule:

    def __init__(self):
        self.coeff = 0.92

    def draw_module(self, config, width, height):
        image = Image.new('RGB', (width, height), 'white')
        draw = ImageDraw.Draw(image)

        draw.rectangle((int((1-self.coeff) * width), 0, int(self.coeff * width), height), fill="black")

        return image