from flask import Flask, render_template,request,redirect
app = Flask(__name__)

users = {} # this holds all the users


@app.route('/create/', methods = ['post', 'get'])
def create():
	global users
	if request.method == 'POST':
		#now get the name/username & password to create the account
		name = request.form['name'] # get the name
		userName = request.form['user_name'] # get User name
		password = request.form['password'] # get pass
		# check to see if this user_name exists because they must be unique!
		if users.has_key(userName):
			print "error key already exists"
			return render_template("create.html", responsetext = "User Name already taken :(")
		else:
			print "Key successfully created! "
			writeKey(users,name,userName,password) # write the key to the dictionary and to the file
			return "Account created!"

	return render_template("create.html")


@app.route('/', methods = ['post','get'])
def login_page():
	global users
	#check to see if the users dictionary is empty, if it is read it in from the file
	if not bool(users): # if its empty, read it in from the file
		print "Reading in from the file"
		readUsers(users)
	# If the user sends back a request( either log in or create a new account)
	if request.method == 'POST':
		# ck which type of response it was
		if request.form["submit"] == "log_in": # user is trying to log into his/her account
			print request.form["user_name"] #print to the console for debugging purposes
			userName = request.form["user_name"]
			password = request.form["password"]
			# ck the credentials
			if checkCredentials(userName,password): #verification was a success
				return 'Logged in successfully :D'
			else:
				print "failed"
				return render_template("login.html", responsetext="You entered a invalid username/password")


		elif request.form["submit"] == "create_account":
			return redirect("create/")  # redirect to the users page
	return render_template("login.html")



def readUsers(users):
	# so read the file and store all the users in the dictionary
	file = open("users.txt","r") #open file for only reading
	for line in file:
		string  = line.split(':') # split the line based on colon (:). (name userId )
		i = 0
		while i < len(string): #loop through the file and read in the users
			name = string[i]
			i+=1
			user_name = string[i]
			i+= 1
			password = string[i]
			i+=1
			users[user_name] = (name,password)

	print (users)
	file.close()


def writeKey(users,name,userName,password):
	users[userName] = (name,password) #insert into the dictionary
	file = open("users.txt","a") #write to the file
	line = name + ":"+userName+":"+password+"\n"
	file.write(line)
	file.close()


def checkCredentials(userName,typedPass):
	global users
	if users.has_key(userName):

		(name,userPass) = users[userName]
		print "typedPass " + typedPass
		print "savedPass " + userPass
		print typedPass is typedPass
		return (typedPass == userPass)
	else:
		return False









if __name__ == '__main__':
    app.run("127.0.0.1",1300,debug = True);

# with app.test_request_context():
# 	print url_for('login')