##################################################
##
## Code to submit task to server.  Do not change.
##
##################################################

import Tkinter
class Dialog(Tkinter.Toplevel):
    def __init__(self, parent, title = None):
        Tkinter.Toplevel.__init__(self, parent)
        self.transient(parent)
        if title: self.title(title)
        self.parent = parent

        body = Tkinter.Frame(self)
        self.initial_focus = self.body(body)
        body.pack(padx=5, pady=5)

        self.buttonbox()
        self.grab_set()

        if not self.initial_focus:
            self.initial_focus = self

        self.protocol("WM_DELETE_WINDOW", self.cancel)
        self.geometry("+%d+%d" % (parent.winfo_rootx()+50,parent.winfo_rooty()+50))
        
        self.initial_focus.focus_set()
        self.wait_window(self)

    def body(self, master):
        return None

    # add standard button box
    def buttonbox(self):
        box = Tkinter.Frame(self)
        w = Tkinter.Button(box, text="Ok", width=10, command=self.ok, default=Tkinter.ACTIVE)
        w.pack(side=Tkinter.LEFT, padx=5, pady=5)
        box.pack()
        
    # standard button semantics
    def ok(self, event=None):
        if not self.validate():
            self.initial_focus.focus_set() # put focus back
            return
        self.withdraw()
        self.update_idletasks()
        self.apply()
        self.cancel()
        
    def cancel(self, event=None):
        # put focus back to the parent window
        self.parent.focus_set()
        self.destroy()
        
    # command hooks
    def validate(self):
        return 1 # override

    def apply(self):
        pass   # override

# ask user for Athena username and MIT ID
class SubmitDialog(Dialog):
    def __init__(self,parent,error=None,title = None):
        self.error = error
        self.athena_name = None
        self.mit_id = None
        Dialog.__init__(self,parent,title=title)

    def body(self, master):
        row = 0
        if self.error:
            l = Tkinter.Label(master,text=self.error,
                              anchor=Tkinter.W,justify=Tkinter.LEFT,fg="red")
            l.grid(row=row,sticky=Tkinter.W,columnspan=2)
            row += 1
        Tkinter.Label(master, text="Athena username:").grid(row=row,sticky=Tkinter.E)
        self.e1 = Tkinter.Entry(master)
        self.e1.grid(row=row, column=1)

        row += 1
        Tkinter.Label(master, text="MIT ID:").grid(row=row,sticky=Tkinter.E)
        self.e2 = Tkinter.Entry(master)
        self.e2.grid(row=row, column=1)

        return self.e1 # initial focus

    # add standard button box
    def buttonbox(self):
        box = Tkinter.Frame(self)
        w = Tkinter.Button(box, text="Submit", width=10, command=self.ok,
                           default=Tkinter.ACTIVE)
        w.pack(side=Tkinter.LEFT, padx=5, pady=5)
        w = Tkinter.Button(box, text="Cancel", width=10, command=self.cancel)
        w.pack(side=Tkinter.LEFT, padx=5, pady=5)
        box.pack()
        
    def apply(self):
        self.athena_name = self.e1.get()
        self.mit_id = self.e2.get()

# Let user know what server said
class MessageDialog(Dialog):
    def __init__(self, parent,message = '',title = None):
        self.message = message
        Dialog.__init__(self,parent,title=title)

    def body(self, master):
        l = Tkinter.Label(master, text=self.message,anchor=Tkinter.W,justify=Tkinter.LEFT)
        l.grid(row=0)

# return contents of file as a string
def file_contents(fname):
    # use universal mode to ensure cross-platform consistency in hash
    f = open(fname,'U')
    result = f.read()
    f.close()
    return result

import hashlib
def digest(s):
    m = hashlib.md5()
    m.update(s)
    return m.hexdigest()

# if verify(f) indicates points have been earned, submit results
# to server if requested to do so
import inspect,os,urllib,urllib2
def checkoff(f,task='???',submit=True):
    tasks = ('L5_1','L5_2','L5_3','L5_4','L5_5')
    if task in tasks:
        points = 'tba'
    else:
        raise ValueError,"task must be one of %s" % ", ".join(tasks)

    if submit and points:
        root = Tkinter.Tk(); #root.withdraw()
        error = None
        while submit:
            sd = SubmitDialog(root,error=error,title="Submit Task %s?"%task)
            if sd.athena_name:
                if isinstance(f,str): fname = os.path.abspath(f)
                else: fname = os.path.abspath(inspect.getsourcefile(f))
                post = {
                    'user': sd.athena_name,
                    'id': sd.mit_id,
                    'task': task,
                    'digest': digest(file_contents(os.path.abspath(inspect.getsourcefile(checkoff)))),
                    'points': points,
                    'filename': fname,
                    'file': file_contents(fname)
                    }
                try:
                    response = urllib2.urlopen('http://scripts.mit.edu/~6.02/currentsemester/submit_task.cgi',
                                               urllib.urlencode(post)).read()
                except Exception,e:
                    response = 'Error\n'+str(e)
                if response.startswith('Error\n'):
                    error = response[6:]
                else:
                    MessageDialog(root,message=response,title='Submission response')
                    break
            else: break

        root.destroy()