class label:
    def __init__(self, queue, name, id):
        self.name = name
        self.id = id
        queue += [ self, ]

    def getString(self, queue, labels):
        return ""

    def getPart(self):
        print("ERROR: LABEL cannot be part of a statement")
        return ""

class c_call:
    def __init__(self, queue, params, id):
        func = params[1]
        for p in params[2:]: func += p.capitalize()
        self.string = params[0].lower() + "." + func

        queue += [ self, ]

    def getString(self, queue, labels):
        return self.string + "()"

    def getPart(self):
        return self.string

class c_drop:
    def __init__(self, queue, params, id):
        f_call = queue.pop()
        if f_call.__class__ != c_call:
            print("ERROR: DROP not after CALL")
            return

        par = []
        for i in range(int(params[0])):
            par += [ queue.pop().getPart(), ]
        par = ", ".join(par)

        self.string = f_call.string + "(" + par + ")"

        queue += [ self, ]

    def getString(self, queue, labels):
        return self.string

    def getPart(self):
        return self.string

class c_push:
    def __init__(self, queue, params, id):
        if params[0] == "variable":
            self.string = "var" + params[1]
        elif params[0] == "returnvalue":
            # We silently assume this always happens at the right moment
            return
        elif str(int(params[0])) != params[0]:
            print("ERROR: PUSH " + params[0] + " not supported")
            return
        else:
            self.string = params[0]

        queue += [ self, ]

    def getString(self, queue, labels):
        print("ERROR: PUSH must be part of a statement")
        return ""

    def getPart(self):
        return self.string

class c_jne:
    def __init__(self, queue, params, id):
        self.id = id
        self.string = queue.pop().getPart()
        self.label = params[0]
        queue += [ self, ]

    def getString(self, queue, labels):
        if not self.label in labels:
            print("ERROR: invalid label")
            return ""

        if self.id < labels[self.label].id:
            ret = "if (" + self.string + "):\n"

            lq = None
            q = queue.pop()
            if q == None: return ret + "  pass"
            while q != None:
                if q.__class__ == label:
                    if q.name == self.label: break
                for l in q.getString(queue, labels).split("\n"):
                    if l == "": continue
                    ret += "  " + l + "\n"
                lq = q
                q = queue.pop()

            if lq.__class__ == c_jmp:
                if self.id >= labels[lq.label].id:
                    # The only thing that is allowed to jump back, are whiles
                    ret = ret.split("\n")
                    ret[0] = ret[0].replace("if ", "while ")
                    ret = "\n".join(ret[:-2])
                else:
                    # The only thing that is allowed to jump forward, are else
                    ret = ret.split("\n")
                    ret = "\n".join(ret[:-2]) + "\n"
                    ret += "else:\n"

                    q = queue.pop()
                    if q == None: return ret + "  pass"
                    while q != None:
                        if q.__class__ == label:
                            if q.name == lq.label: break
                        for l in q.getString(queue, labels).split("\n"):
                            if l == "": continue
                            ret += "  " + l + "\n"
                        q = queue.pop()


            return ret.strip()

        return "if not (" + self.string + "): goto " + self.label

    def getPart(self):
        print("ERROR: JNE cannot be part of a statement")
        return ""

class c_pop:
    def __init__(self, queue, params, id):
        if params[0] == "variable":
            self.string = "var" + params[1] + " = " + queue.pop().getPart()
        else:
            print("ERROR: POP " + params[0] + " not support")
            return

        queue += [ self, ]

    def getString(self, queue, labels):
        return self.string

    def getPart(self):
        print("ERROR: POP cannot be part of a statement")
        return ""

class c_and:
    def __init__(self, queue, params, id):
        self.string = queue.pop().getPart() + " and " + queue.pop().getPart()
        queue += [ self, ]

    def getString(self, queue, labels):
        print("ERROR: AND must be part of a statement")
        return ""

    def getPart(self):
        return self.string

class c_jmp:
    def __init__(self, queue, params, id):
        self.id = id
        self.label = params[0]
        queue += [ self, ]

    def getString(self, queue, labels):
        return "goto " + self.label

    def getPart(self):
        print("ERROR: JMP cannot be part of a statement")
        return ""

class c_return:
    def __init__(self, queue, params, id):
        self.string = "return"
        queue += [ self, ]

    def getString(self, queue, labels):
        return self.string

    def getPart(self):
        print("ERROR: RETURN cannot be part of a statement")
        return ""


f = open("script.emc", "r")

lines = f.readlines()

labels = {}
queue = []
i = 0
for line in lines:
    i += 1
    line = line.strip().lower()
    if line == "": continue;

    if line.find(':') != -1:
        pos = line.find(':')
        labels[line[:pos]] = label(queue, line[:pos], i)
        continue

    command = line.split(' ')[0]
    params = line.split(' ')[1:]

    globals()["c_" + command](queue, params, i)

queue += [ None, ]
queue.reverse()

q = queue.pop()
while q != None:
    ret = q.getString(queue, labels)
    if ret != "": print(ret)
    q = queue.pop()