def getGCcontent1(dict):
   li=[]
   for i in dict.keys():
      GC=(dict[i].count("g") + dict[i].count("c")) / float(len(dict[i]))
      li.append(GC)
   return li
   

def getLowestGC(inverters, GClist):          
   lowest=[]
   GClist.sort()
   for i in inverters:
      if GClist[0]==i.getGCcontent2():
         lowest.append( i.getName() )
   return lowest


class Inverter:
         
   def __init__(self, thisRBS, thisORF, thisTerminator, thisPromoter): 
      self.RBS=thisRBS
      self.ORF=thisORF
      self.terminator=thisTerminator
      self.promoter=thisPromoter

   def getName(self):   
      return self.RBS[0] + "." + self.ORF[0] + "." + self.terminator[0] + "." + self.promoter[0]

   def getSeq(self):
      return self.RBS[1] + self.ORF[1] + self.terminator[1] + self.promoter[1]

   def getGCcontent2(self):
      x=self.getSeq()
      return (x.count("g") + x.count("c")) / float(len(x))

   def getORFLength(self):
      return len(self.ORF[1])
         

#---------------- MAIN PROGRAM --------------------

   
myDict=eval(open("parts.dict").read())
map=eval(open("map.dict").read())
         
RBSKeys=myDict["RBSDict"].keys()
ORFKeys=myDict["ORFDict"].keys()
terminatorKeys=myDict["terminatorDict"].keys()
promoterKeys=myDict["promoterDict"].keys()
      
invertersDict={}

for p in promoterKeys:
   for o in ORFKeys:
      if p==map[o]:
         for t in terminatorKeys:
            for r in RBSKeys:
               x=myDict["RBSDict"][r]+myDict["ORFDict"][o]+myDict["terminatorDict"][t]+myDict["promoterDict"][p]
               y=r+"."+o+"."+t+"."+p
               invertersDict[y]=x      

GClist1=getGCcontent1(invertersDict)

inverters=[]
for p in promoterKeys:
   for o in ORFKeys:
      if p==map[o]: 
         for t in terminatorKeys:
            for r in RBSKeys:
               inv=Inverter([r,myDict["RBSDict"][r]],[o,myDict["ORFDict"][o]],[t,myDict["terminatorDict"][t]],[p,myDict["promoterDict"][p]])
               inverters.append(inv)    
      
nameList=[]
seqList=[]
for i in inverters:
   nameList.append(i.getName())
   seqList.append(i.getSeq())

GClist2=[]
for i in inverters:
   GClist2.append( i.getGCcontent2() )

lowestGC=getLowestGC(inverters, GClist2)          
print "The inverter with the lowest GC content is ", lowestGC