#!/usr/bin/python
# -*- coding: ascii -*-
# $Id$


from __future__ import absolute_import
from __future__ import print_function
__author__ = "JCF"
__email__  = "jean-claude.feltes@education.lu"



from math import sin, cos, pi
from CNC import CW,CNC,Block
from ToolsPage import Plugin


#==============================================================================
# 
#==============================================================================


def calculate_coordinates(wrenchsize):
	'''return array of (x,y) tuples for hexagon'''
	a = wrenchsize/2
	r = a / (cos(pi/6))
	
	points = []

	for i in range(0,7):
		phi = i * pi /3
		
		x = r * cos(phi)
		y = r * sin(phi)
		x= round(x, 3)
		y= round(y, 3)
		points.append((x, y))
		
	return points    


#==============================================================================
# Create a simple nut
#==============================================================================
class Tool(Plugin):
	__doc__ = _("Generate a simple nut with given wrench size")

	def __init__(self, master):
		Plugin.__init__(self, master, "simpleNut")
		self.icon  = "lamp"
		self.group = "Generator"
		self.variables = [  ("name", "db", "Nut", _("Name")),
					("wrench_size", "float",  10, _("wrench size in mm")),]
	
		self.buttons.append("exe")

	# ----------------------------------------------------------------------
	def execute(self, app):
		
		# get user input and calculate points for hexagon:	
		name = self["name"]
		if not name or name =="default":
			name = "Nut"
		wrenchsize = self["wrench_size"]
		points = calculate_coordinates(wrenchsize)
				
		# init blocks of gcode:
		blocks = []
		block = Block(name)
		
		# go G0 to first point at safe height:
		block.append(CNC.zsafe())
		x1, y1 = points[0]
		block.append(CNC.grapid(x1, y1))
		block.append("(entered)")
		
		# go G1 for the other points
		for p in points[1:]:
			x, y = p
			block.append(CNC.gline(x, y))
		
		block.append("(exiting)")
		
		# append this block of gcode 
		blocks.append(block)
		active = app.activeBlock()
		if active==0:
			active=1
		app.gcode.insBlocks(active, blocks, "SimpleNut")
		app.refresh()
		app.setStatus(_("Generated: Nut"))