#!/usr/bin/env python3

import os
import os.path
import re
import copy
import getpass


LLIUREX_DEFAULTS="/usr/share/lliurex-mime-settings/mimeapps.list"
SYSTEM_DIR="/usr/share/applications/"
SYSTEM_DEFAULTS=SYSTEM_DIR + "mimeapps.list"
ETC_DESKTOP_DIR="/etc/xdg/lliurex/desktop/"
ETC_CLASSROOM_DIR="/etc/xdg/lliurex/classroom/"
ETC_DESKTOP_FILE=ETC_DESKTOP_DIR+"mimeapps.list"
ETC_CLASSROOM_FILE=ETC_CLASSROOM_DIR+"mimeapps.list"

class DefaultListManager:
	
	def __init__(self):
		
		self.system_keys={}
		if not os.path.exists(SYSTEM_DIR):
			os.makedirs(SYSTEM_DIR)
		
	#def init
	
	def read_file(self,path):
		
		dic={}
		dic["default"]={}
		dic["added"]={}
		dic["removed"]={}

		added_found=False
		removed_found=False

		if os.path.exists(path):

			f=open(path,'r')
			lines=f.readlines()
			f.close()
			
			for line in lines:
				line=line.strip("\n")
				
				if "Added Associations" in line:
					added_found=True
				
				if "Removed Associations" in line:
					removed_found=True
				
				if "=" in line:
					tmp=line.split("=")
					if not removed_found and not added_found:
						dic["default"][tmp[0]]=tmp[1]
					elif added_found and not removed_found:
						dic["added"][tmp[0]]=tmp[1]
					else:
						dic["removed"][tmp[0]]=tmp[1]
		return dic
		
	#def readFile
	
	
	def merge_dic(self,old_dic,new_dic):
		
		
		ret=copy.copy(old_dic)
		
		for key in new_dic["default"]:
			ret[key]=new_dic["default"][key]
		
		for key in new_dic["added"]:
			ret[key]=new_dic["added"][key]
		
		for key in new_dic["removed"]:
			ret[key]=new_dic["removed"][key]
		
			
		return ret
		
	
	def print_keys(self,dic):
		
		for key in dic:
			print("%s = %s"%(key,dic[key]))
	
	
	def write_file(self,path,dic):
		
		if dic != None:
			f=open(path,'w')
			f.write("\n[Default Applications]\n\n")
			for key in dic["default"]:
				f.write(key + " = " + dic["default"][key] + "\n")
				
			f.write("\n[Added Associations]\n\n")
			for key in dic["added"]:
				f.write(key + " = " + dic["added"][key] + "\n")
				
			f.write("\n[Removed Associations]\n\n")
			
			for key in dic["removed"]:
				f.write(key + " = " + dic["removed"][key] + "\n")
				
			f.close()
		
	#def write_file
	
#class DefaultListManager

if __name__=="__main__":
	
	if getpass.getuser()!="root":
		print("[!] You need to execute this program with root priviledges")
	else:
		print("Lliurex update mime...")
		try:
			dlm=DefaultListManager()
			system=dlm.read_file(SYSTEM_DEFAULTS)
			lliurex=dlm.read_file(LLIUREX_DEFAULTS)
			
			final=dlm.merge_dic(lliurex,system)
			dlm.write_file(SYSTEM_DEFAULTS,final)
			
			if os.path.exists(ETC_DESKTOP_DIR):
				if not os.path.exists(ETC_DESKTOP_FILE):
					os.symlink(SYSTEM_DEFAULTS,ETC_DESKTOP_FILE)
					
			if os.path.exists(ETC_CLASSROOM_DIR):
				if not os.path.exists(ETC_CLASSROOM_FILE):
					os.symlink(SYSTEM_DEFAULTS,ETC_CLASSROOM_FILE)

		except Exception as e:
			print(e)