class obj(object):
    def __init__(self,name,on,heavierThan):
        self.name = name
        self.setState(on,heavierThan)
        print("Object created with name '",self.name,"'.")
    def setState(self,on,heavierThan):
        #On = what object is on top of it
        self.on = on
        self.heavierThan = heavierThan

def getItemsFromString(string):
    arr  = []
    word = ""
    for i in range(len(string)):
        if string[i] == " ":
            arr.append(word)
            word = ""
        elif i == len(string)-1:
            word += string[i]
            finalWord = word.replace(" ","")
            #print("appending last word to list. The word is:", word)
            arr.append(finalWord)
        else:
            word += string[i]
    return arr

def getOneParameter(command):
    started = False
    finished = False
    parameter = ""
    for letter in command:
        if letter == "("  and not started:
            started = True
        elif letter == ")" and started and not finished:
            finished = True
            return parameter
        elif started and not finished:
            parameter += letter

def getTwoParameters(command):
    started1 = False
    finished1 = False
    started2 = False
    finsihed2 = False
    parameter = ""
    parameters = []
    for letter in command:
        if letter == "(":
            started1 = True
        elif letter == ",":
            finished1 = True
            started2 = True
            parameters.append(parameter)
            parameter = ""
        elif letter == ")":
            finished2 = True
            parameters.append(parameter)
            return parameters
        elif (started1 and not finished1) or (started2 and not finsihed2):
            parameter += letter

def getObjectsFromNames(arr):
    objArr = []
    for i in range(len(arr)):
        objArr.append(obj(arr[i],None,None))
    return objArr

def setInitialState(arr):
    #First iterate to find the commands and shove them in a tuple
    commands = []
    command = ""
    for i in range(len(arr)):
        wordFinished = False
        for letter in arr[i]:
            if letter == "(":
                commands.append(command)
                command = ""
                wordFinished = True
            elif not wordFinished:
                command += letter
    #print("The commands entered are:",commands)
    for i in range(len(commands)):
        if commands[i] == "ON":
            paramStrings = getTwoParameters(arr[i])
            params = []
            for i in range(len(objects)):
                if paramStrings[0] == objects[i].name:
                    params.append(objects[i])
            for i in range(len(objects)):
                if paramStrings[1] == objects[i].name:
                    params.append(objects[i])
            params[1].on = params[0].name
        elif commands[i] == "HEAVIER":
            params = []
            paramStrings = getTwoParameters(arr[i])
            for i in range(len(objects)):
                if paramStrings[0] == objects[i].name:
                    params.append(objects[i])
            for i in range(len(objects)):
                if paramStrings[1] == objects[i].name:
                    params.append(objects[i])
            params[0].heavierThan = params[1].name

           #print("The parameters are: ",params)
        elif commands[i] == "CLEAR":
            paramString = getOneParameter(arr[i])
            for i in range(len(objects)):
                if paramString == objects[i].name:
                    param = objects[i]
            param.on = None
            #print("The lone parameter is:", param)


def move(x,y,z):
    #check if preconditions are true
    if y.on == x.name and z.on == None and x.on == None and z.heavierThan == x.name:
        print("preconditions are true!")
        z.on = x.name
        y.on = None

def printState():
    for i in range(len(objects)):
        print("Name:",objects[i].name,"| Object on top of it:",objects[i].on,"| Heavier than:",objects[i].heavierThan)

#Actual Program begins here -------------------------------------------------------------------------------------------------------
#objNames = getItemsFromString(input("Enter the objects in the Toy World as words separated by a space:"))
#stateRaw = getItemsFromString(input("Enter the state the objects are in, using the format 'Command(x,y):"))
objNames = getItemsFromString("A table2 table1")
stateRaw = getItemsFromString("ON(A,table1) HEAVIER(table1,A) HEAVIER(table2,A) CLEAR(A) CLEAR(table2)")
goalStateRaw = getItemsFromString("CLEAR(table1) CLEAR(A)")

objects = getObjectsFromNames(objNames);
setInitialState(stateRaw)
print("The object names are:",objNames)
print("The initial raw state is:", stateRaw)
print("The objects are:")
printState()
print("attempting to move A from table1 to table2...")
move(objects[0],objects[2],objects[1])
printState()