__author__="bjschuma"
__date__ ="$Dec 8, 2009 8:40:36 AM$"

import sys
from bt.message import write

class Manager:
	def __init__(self):
		write("Creating plugin manager", True)
		self.enabled = []
		# Map plugin name to dictionary
		self.disabled = []


	def addPlugins(self, plugins):
		# Add each plugin to the disabled list
		for plugin in plugins:
			write("Adding plugin: " + str(plugin), True)
			self.disabled += [plugin]
			# If we are adding a core plugin, activate it right away
			if(plugin.__type__=="core"):
				self.enablePlugin(plugin.__name__)


	# Move plugin from old[index] to new
	# Return the plugin
	def movePlugin(self, index, old, new):
		plugin = old.pop(index)
		index = len(new)
		new += [plugin]
		return plugin,index


	# Disable a plugin, return index of disabled plugin
	def disablePlugin(self,name):
		index = self.findPlugin(name, self.enabled)
		if index > -1:
			write("Disabling plugin: "+name)
			plugin,index = self.movePlugin(index, self.enabled, self.disabled)
			plugin.close()
		return index


	# Move a plugin to the enabled list, return number of plugins enabled
	def enablePlugin(self,name):
		index = self.findPlugin(name, self.disabled)
		if index > -1:
			write("Enabling plugin: "+name,True)
			plugin,index = self.movePlugin(index, self.disabled, self.enabled)
			plugin.open()
		return True


	# Return first location where plugin.__name__ == name
	def findPlugin(self,name,array):
		write("Finding plugin: "+name,True)
		for i in range(len(array)):
			if array[i].__name__ == name:
				return i
		return -1


	# Disable the plugin, reload it, reenable it
	def reloadPlugin(self,name):
		# Check if plugin has been loaded
		if (name in sys.modules) == False:
			write("Plugin not loaded: "+name, True)
			return
		reenable = self.disablePlugin(name)

		#import sys
		#write(sys.modules["example"])
		#return
		#reenable = self.disablePlugin(name)
		#index = self.findPlugin(name, self.disabled)
		#write("Reloading plugin: "+name)
		#plugin = self.disabled[index]
		#print plugin
		#reload(plugin)
		# Only reenable if a plugin was disabled
		#if reenable == True:
		#	self.enablePlugin(name)




global manager
manager = Manager()