import vecmath
from operator import truediv

class ObjectLocation(vecmath.Vector):
    def __init__(self, token):
        self.token = token


class OutputBuilder(vecmath.Vector):
    def __init__(self):
        self.pos_height = 7
        self.neg_height = 7

        self.pos_width = 7
        self.neg_width = 7

        self.locations = []

        self.center_char = 'O'
        self.draw_center = True

        self.draw_x_center_line = True

        self.x_center_line_char = '-'

        self.draw_y_center_line = True
        self.y_center_line_char = '|'

        self.fill_char = '#'

        self.resolution = 100



    def addLocation(self, group):
        if not isinstance(group, Group):
            raise ValueError, 'You can only add Group Objects'

        self.locations.append(group)

    def generate(self):
        half_res = truediv(self.resolution, 2)
        s = ''

        for x in xrange(-abs(self.neg_width), abs(self.pos_width) + 1):
            for y in xrange(-abs(self.neg_height), abs(self.pos_height) + 1):

                if x == 0 and y == 0:
                    if self.draw_center:
                        # CENTER POINT!!
                        s += self.center_char
                        continue

                xres = x * self.resolution
                yres = y * self.resolution
                for l in self.locations:
                    if vecmath.isbetweenRect((l.x, l.y, 0), (xres - half_res, yres - half_res, 0), (xres + half_res, yres + half_res, 0)):
                        s += l.token

                        break

                if x == 0 and y != 0:
                    if self.draw_x_center_line:
                        s += self.x_center_line_char
                        continue

                elif x != 0 and y == 0:
                    if self.draw_y_center_line:
                        s += self.y_center_line_char
                        continue

                s += self.fill_char

            s += '\n'

        return s