using GalaSoft.MvvmLight;
using GalaSoft.MvvmLight.Command;
using GalaSoft.MvvmLight.Views;
using Model;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Input;

namespace ClickNTrip.ViewModel
{
    public class VisitorCreateProfileViewModel : ViewModelBase
    {
        private User _newUser;
        public User NewUser
        {
            get
            {
                return _newUser;
            }
            set
            {
                if (value != _newUser)
                {
                    _newUser = value;
                    OnNotifyPropertyChanged("NewUser");
                }
            }
        }
        private String _retypedPassword;
        public String RetypedPassword
        {
            get
            {
                return _retypedPassword;
            }
            set
            {
                if (value != _retypedPassword)
                {
                    _retypedPassword = value;
                    OnNotifyPropertyChanged("RetypedPassword");
                }
            }
        }
        private DateTime _today = DateTime.Now;
        private DateTime _birthdate;
        public DateTime Birthdate
        {
            get
            {
                return _birthdate;
            }
            set
            {
                if (_birthdate == null)
                {
                    _birthdate = value;
                    OnNotifyPropertyChanged("Birthdate");
                }
            }
        }
        public event PropertyChangedEventHandler PropertyChanged;

        public void OnNotifyPropertyChanged(string property)
        {
            if (PropertyChanged != null)
            {
                PropertyChanged(this, new PropertyChangedEventArgs(property));
            }
        }
        private INavigationService _navigationService;
        public VisitorCreateProfileViewModel(INavigationService navigationService)
        {
            NewUser = new User
            {
                Email = "",
                Password = "",
                Name = "",
                FirstName = "",
            };
            Birthdate = _today;
            _navigationService = navigationService;
        }

        private ICommand _goBackToHomeCommand;
        public ICommand GoBackToHomeCommand
        {
            get
            {
                if (_goBackToHomeCommand == null)
                {
                    _goBackToHomeCommand = new RelayCommand(() => GoBackToHome());
                }

                return _goBackToHomeCommand;
            }
        }
        private void GoBackToHome()
        {
            _navigationService.NavigateTo("HomeVisitor");
        }

        private ICommand _goNextCommand;
        public ICommand GoNextCommand
        {
            get
            {
                if (_goNextCommand == null)
                {
                    _goNextCommand = new RelayCommand(() => GoNext());
                }

                return _goNextCommand;
            }
        }
        private void GoNext()
        {
            if(NotEmptyEmail(NewUser) && NotEmptyFirstName(NewUser) && NotEmptyName(NewUser) && SamePassword(NewUser, RetypedPassword) && CorrectBirthDate(Birthdate))
            {
                _navigationService.NavigateTo("CreateProfileOptionalVisitor", NewUser);
            }
        }

        private bool SamePassword(User NewUser, String RetypedPassword)
        {
            if(NewUser.Password.Equals(RetypedPassword) && !NewUser.Password.Equals(""))
            {
                return true;
            }
            else
            {
                //Different passwords or empty fields
                return false;
            }
        }
        private bool NotEmptyName(User NewUser)
        {
            if (!NewUser.Name.Equals("")) return true;
            else return false;
        }
        private bool NotEmptyFirstName(User NewUser)
        {
            if (!NewUser.FirstName.Equals("")) return true;
            else return false;
        }
        private bool NotEmptyEmail(User NewUser)
        {
            if (!NewUser.Email.Equals("")) return true;
            else return false;
        }
        private bool CorrectBirthDate(DateTime Birthdate)
        {
            if (Birthdate < _today) return true;
            else return false;
        }
    }
}