import pandas as pd
import random
d ={'admin':'Pj@123456'}
num = {'+919399374451':'admin'}
SQ = {'what is your hobby ?':'2d animation'}

data = {'UserName':['admin'],
        'pass':['Pj@123456'],
        'SA':['2D animation'],
       'num':['+919399374451']
       }
df = pd.DataFrame(data)

try:
    k = pd.read_csv(r'userData.csv')
except:
    df.to_csv('userData.csv',index = False)
    k = pd.read_csv(r'userData.csv')

t = pd.read_csv(r'userData.csv',index_col = 'UserName')

def checkPasswordStrength():
    while True:
        password = input("Enter a strong password: ")

        # Check if the password meets minimum length requirements (e.g., at least 8 characters)
        if len(password) < 8:
            print("Password should be at least 8 characters long.")
            continue

        # Check if the password contains at least one uppercase letter
        if not any(char.isupper() for char in password):
            print("Password should contain at least one uppercase letter.")
            continue

        # Check if the password contains at least one lowercase letter
        if not any(char.islower() for char in password):
            print("Password should contain at least one lowercase letter.")
            continue

        # Check if the password contains at least one digit
        if not any(char.isdigit() for char in password):
            print("Password should contain at least one digit.")
            continue

        # Check if the password contains at least one special character
        if not any(not char.isalnum() for char in password):
            print("Password should contain at least one special character (e.g., !@#$%^&*(),.?\":{}|<>).")
            continue

        # If all conditions are met, the password is considered strong
        return password
    
def forgotPass(userIn,t):
    flag2 = 3
    while flag2:
        q = input("what is your hobby ?").lower()
        if(q==t.loc[userIn]['SA']):
            while 1:
                s = checkPasswordStrength()
                k.loc[k['UserName'] == userIn, 'pass'] = s
                k.to_csv('userData.csv',index = False)
                print('yes')
                return s
        else:
            flag2 = flag2 - 1 
            print("incorrect , please try again")
    return 'Failed'

def VerifyOTP(abcd,userIn):       #abcd is the return value of numSignIn
    x = int(input("enter the OTP you get on your phone"))
    if(x == abcd):
        while 1:
            k.loc[k['UserName'] == userIn, 'pass'] = s
            k.to_csv('userData.csv',index = False)
            print('yes')
            return True
    return False
    
def ResetPass(userIn,t):
    x = input('''seems like you forgot your password to reset you password
            press 1 for OTP method
            press 2 for Security Question Method''')
    if(x=='2'):
        forgotPass(userIn,t)
        NsignIN()
    if(x=='1'):
        abcd = numSignIn(userIn,t)
        if VerifyOTP(abcd,userIn):
            signIn()
            return 'Successfull'
        else:
            return 'Failed'
        
def OTPgenerator():
    otp = random.randint(1000,9999)
    return otp

def numSignIn(userIn,t):
    flag = True
    while(flag):
        inputMobNo = input('Enter your registered mobile number: ')
        if((inputMobNo in t['num']) and t.loc[userIn]['num']==inputMobNo):       
            OTP = OTPgenerator()
            print(OTP)
            
            
#             This is Twilio API, we are using twilio to send OTP
            import os
            from twilio.rest import Client
            # Set environment variables for your credentials
            # Read more at http://twil.io/secure
            account_sid = "Different_for_different_user"
            auth_token = "Different_for_different_users"
            client = Client(account_sid, auth_token)
            message = client.messages.create(
              body=OTP,
              from_="Differetn_for_every_user",
              to=inputMobNo           #This is the mobile number of user , given at the time of SignUp
            )
            print(message.sid)
            flag=False
            print("this is from return OTP")
            return OTP;

def NsignUp():
    nums = list(k['num'])
    nums
    l = []
    j = 0
    flag = True
    flag2 = True
    while flag:
        x = input('Enter your user Name')
        if(x in k['UserName'].values):
            print('UserName taken , try another one')
            continue
        else:
            l.append(x)
            y = checkPasswordStrength()
            l.append(y)
            z = input('Enter security question')
            l.append(z)
            if(j>0):
                break
            while flag2:
                num = input('Enter the mobile number')
                if(num in nums):
                    print('number already used , use another number')
                    continue
                else:
                    l.append(num)
                    j = j+1
                    k.loc[k.index[-1]+1] = l
                    flag = False
                    k.to_csv('userData.csv',index = False)
                    return k
                    
def NsignIN():
    flag2 = 3
    while flag2:
        t = pd.read_csv(r'userData.csv',index_col = 'UserName')
        x = input('Enter you user name')
        if(x in list(t.index)):
            flag2 = 3
            while flag2:
                y = input('enter you password')
                if(y in list(t.loc[x])):
                    print("logged in successfully")
                    return 'Successful'
                else:
                    print('Incorrect password plz try again')
                    flag2 = flag2-1
            ResetPass(x,t)
        else:
            flag = flag-1
            print('Username not found , enter a valid user name')
    return False

def main():
    while 1:
        mode = input('''choose mode:
        Press 1 to SignUp
        Press 2 to SignIn
        Press 0 to exit
        : ''')
        if(mode=='1'):
            NsignUp()
            return 'Done'
        elif(mode=='2'):
            NsignIN()
            return True
        elif(mode=='0'):
            print("Thankyou for using our service")
            break
        else:
            print("enter valid input")
main()