# apt install libcairo2-dev pkg-config python3-dev
# pip install pycairo

import cairo
import math
import sys

from enum import IntEnum

from ttf import create_cairo_font_face_for_file


WIDTH = 350
HEIGHT = 430


def deg2rad(degrees):
    return degrees * (math.pi / 180)


class TextAlignment(IntEnum):
    LEFT = 1
    CENTER = 2
    RIGHT = 3


def draw_text(ctx, text, pos, fsize, noise, theta = 0.0, align = TextAlignment.CENTER):
    """Dessine un texte en respectant des propriétées."""

    ctx.save()

    ctx.set_font_size(fsize)

    fascent, fdescent, fheight, fxadvance, fyadvance = ctx.font_extents()
    x_off, y_off, tw, th = ctx.text_extents(text)[:4]

    if align == TextAlignment.LEFT:
        nx = 0
    elif align == TextAlignment.RIGHT:
        nx = -tw
    else:
        nx = -tw / 2.0

    ny = fheight / 2

    ctx.translate(pos[0], pos[1])
    ctx.rotate(theta)
    ctx.translate(nx, ny)
    ctx.move_to(0,0)

    ctx.text_path(text)
    ctx.set_source_surface(noise, 0, -fheight)
    ctx.fill_preserve()
    ctx.set_source_rgb(1.0, 1.0, 1.0)
    ctx.set_line_width(1)
    ctx.stroke()

    ctx.restore()


if __name__ == '__main__':
    """Point d'entrée du script."""

    surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, WIDTH, HEIGHT)

    cr = cairo.Context(surface)

    face = create_cairo_font_face_for_file('cour10p_b.ttf')
    cr.set_font_face(face)

    noise = cairo.ImageSurface.create_from_png('noise.png')

    # Type d'édition

    if len(sys.argv) > 2:

        draw_text(cr, sys.argv[2], [ 300, 25 ], 32, noise,
                  theta = deg2rad(270), align = TextAlignment.RIGHT)

        cr.set_source_rgb(0, 0, 0)
        cr.paint_with_alpha(0.4)

    # Numéro de version

    draw_text(cr, sys.argv[1], [ 149, 10 + 259 + 14 + 42 + 2 ], 23, noise, align=TextAlignment.LEFT)

    cr.set_source_rgb(0, 0, 0)
    cr.paint_with_alpha(0.5)

    # Logo

    logo = cairo.ImageSurface.create_from_png('logo.png')

    scale_y = 259 / logo.get_height()

    cr.save()

    cr.translate((WIDTH - (logo.get_width() * scale_y)) / 2, 12)

    cr.scale(scale_y, scale_y)

    cr.set_source_surface(logo, 0, 0)
    cr.paint()

    cr.restore()

    # Titre

    draw_text(cr, 'Chrysalide', [ WIDTH / 2, 10 + 259 + 14 + 4 ], 42, noise)

    # cr.rectangle(265, 30, 10, 10)
    # cr.set_source_rgb(1, 0, 0)
    # cr.fill()

    # cr.rectangle(265, 255, 10, 10)
    # cr.set_source_rgb(1, 0, 0)
    # cr.fill()

    surface.write_to_png('bg.png')