from .base import Drawer


def adjust_font(base, text):
	text = str(text)
	if len(text) < 2:
		return round(0.7*base)
	elif len(text) < 3:
		return round(0.55*base)
	else:
		return round(0.4*base)


class Svg(Drawer):
	extension = "svg"

	padding = 15
	high_numbers = True
	
	def __init__(self, start=0):
		super().__init__(start)
		self.boardSize = 480
		self.padding = 30

	def render(self, template_name, bgcolor=""):
		"""Render the template with the current drawer state.

		:param str template_name: a template file name in the templ directory
		:param bgcolor: a background color
		:type bgcolor: an SVG color, which is the same as a CSS color
		:return: the rendered template string"""
		points = [p for (i, p) in sorted(self._index.values(), key=lambda x: x[0])]

		stones = [p for p in points if p.color and p.label == ""]
		moves = [p for p in points if p.color and p.label]
		labels = [p for p in points if not p.color and p.label]

		params = {
			"boardSize": self.boardSize, "padding": self.padding, "stones": stones, "moves": moves,
			"labels": labels, "adjustFont": adjust_font, "bgcolor": bgcolor}

		return self._env.get_template(template_name).render(params)

	def save(self, filename, template="templ.svg", bgcolor=""):
		"""Render the template and save it with the filename.

		:param str filename: a path where to save the diagram. SVG and TXT suffixes will be appended
		:param str template: a template file name in the templ directory
		:param bgcolor: a background color
		:type bgcolor: an SVG color, which is the same as a CSS color"""
		file = open(filename+".svg", 'w')
		file.write(self.render(template, bgcolor))
		file.close()

		super().save(filename)