#!/usr/bin/python
# -*- coding: utf-8 -
#Imports:
import json, urllib
from graph import Graph
class DomainSelector:
	def __init__(self, nodesFile, graphFile, dataPath = './', printStatus = False, targets = None, branch = 'stable'):
		self.printStatus = printStatus
		self.targets = targets
		self.nodesData = self.__getFile__(nodesFile)
		self.graphData = self.__getFile__(graphFile)
		self.dataPath = dataPath

		self.graph = Graph(self.nodesData, self.graphData)
		if self.targets == None:
			self.writeConfigFiles(self.graph.nodes_list,"all")
			self.writeDumpFile(self.graph.nodes_list,"all")
		else:
			nodes = {}
			for k,v in self.targets.iteritems():
				nodes = self.graph.getNodeCloudsIn(v,branch)
				self.writeConfigFiles(nodes,k)
				self.writeDumpFile(nodes,k)
				nodes = {}
			self.writeConfigFiles(self.graph.nodes_no_autoupdater,"no_autoupdater")
			self.writeConfigFiles(self.graph.nodes_no_geo,"no_geo")

	def __getFile__(self, nodesFile):
		if nodesFile.startswith('https://') or nodesFile.startswith('http://'):
			if self.printStatus:
				print "Download node.json from URL: " + nodesFile
			resource = urllib.urlopen(nodesFile)
		else:
			if self.printStatus:
				print "Open node.json file: " + nodesFile
			resource = open(nodesFile)
		data = json.loads(resource.read())
		resource.close()
		return data

	def writeConfigFiles(self, nodes, name):
		maxDepth = self.maxDepth(nodes)
		for i in range(0,maxDepth):
			content = 'geo $switch {\n  default 0;'
			f = open(self.dataPath+'/'+name+'_node_level'+str(i),'w')
			for node in nodes.itervalues():
				if node.stepsToVpn == i:
					if node.ipv6 and node.hostname:
						content += '\n  '+node.ipv6+' 1; #'+node.hostname
			content += '\n}'
			f.write(content.encode('utf8'))
			f.close()

	def writeDumpFile(self, nodes, name):
		content = {}
		for node in nodes.itervalues():
			if node.ipv6 and node.hostname:
				content[node.nodeid] = {
					'nodeid' : node.nodeid,
					'ipv6' : node.ipv6,
					'hostname' : node.hostname,
					'level' : node.stepsToVpn,
				}
		with open(self.dataPath+'/'+name+'_node_statistics.json', 'w') as outfile:
			json.dump(content, outfile)

	def maxDepth(self, nodes):
		maxDepth = 0
		for v in nodes.itervalues():
			if v.stepsToVpn > maxDepth:
				maxDepth = v.stepsToVpn
		return maxDepth+1