using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Linq;
using System.Reflection;

namespace FlexGrid101
{
    /// <summary>
    /// Simple data class generator.
    /// </summary>
    /// <remarks>
    public class Customer : INotifyPropertyChanged, IEditableObject
    {
        #region ** fields

        int _id, _countryId, _orderCount;
        string _first, _last;
        string _address, _city, _postalCode, _email;
        bool _active;
        DateTime _lastOrderDate;
        double _orderTotal;

        static Random _rnd = new Random();
        static string[] _firstNames = "Andy|Ben|Charlie|Dan|Ed|Fred|Gil|Herb|Jack|Karl|Larry|Mark|Noah|Oprah|Paul|Quince|Rich|Steve|Ted|Ulrich|Vic|Xavier|Zeb".Split('|');
        static string[] _lastNames = "Ambers|Bishop|Cole|Danson|Evers|Frommer|Griswold|Heath|Jammers|Krause|Lehman|Myers|Neiman|Orsted|Paulson|Quaid|Richards|Stevens|Trask|Ulam".Split('|');
        static KeyValuePair<string, string[]>[] _countries = "China-Beijing,Chongqing,Shanghai,Tianjin,Hong Kong,Macau,Anqing,Bengbu,Bozhou,Chaohu|India-New Delhi,Mumbai,Delhi,Bangalore,Hyderabad,Ahmedabad,Chennai,Kolkata,Surat,Pune|United States-Washington,New York,Los Angeles,Chicago,Houston,Philadelphia,Phoenix,San Antonio,San Diego,Dallas|Indonesia-Jakarta,Surabaya,Bandung,Bekasi,Medan,Tangerang,Depok,Semarang,Palembang,South Tangerang|Brazil-Brasilia,San Pablo,Rio de Janeiro,Salvador,Fortaleza,Belo Horizonte,Manaus,Curitiba,Recife,Porto Alegre|Pakistan-Islamabad,Karachi,Lahore,Faisalabad,Rawalpindi,Gujranwala,Multan,Hyderabad,Peshawar,Quetta|Russia-Moscow,Saint Petersburg,Novosibirsk,Yekaterinburg,Nizhny Novgorod,Kazan,Chelyabinsk,Samara,Omsk,Rostov-na-Donu|Japan-Tokio,Yokohama,Ōsaka,Nagoya,Sapporo,Kōbe,Kyōto,Fukuoka,Kawasaki,Saitama|Mexico-Mexico City,Guadalajara,Monterrey,Puebla,Toluca,Tijuana,León,Juárez,Torreón,Querétaro".Split('|').Select(str => new KeyValuePair<string, string[]>(str.Split('-').First(), str.Split('-').Skip(1).First().Split(','))).ToArray();
        static string[] _emailServers = "gmail|yahoo|outlook|aol".Split('|');
        static string[] _streetNames = "Main|Broad|Grand|Panoramic|Green|Golden|Park|Fake".Split('|');
        static string[] _streetTypes = "ST|AVE|BLVD".Split('|');
        static string[] _streetOrientation = "S|N|W|E|SE|SW|NE|NW".Split('|');

        #endregion

        #region ** initialization

        public Customer()
        {
        }

        public Customer(int id)
        {
            Id = id;
            FirstName = GetRandomString(_firstNames);
            LastName = GetRandomString(_lastNames);
            Address = GetRandomAddress();
            CountryId = _rnd.Next() % _countries.Length;
            var cities = _countries[CountryId].Value;
            City = GetRandomString(cities);
            PostalCode = _rnd.Next(10000, 99999).ToString();
            Email = string.Format("{0}@{1}.com", (FirstName + LastName.Substring(0, 1)).ToLower(), GetRandomString(_emailServers));
            LastOrderDate = DateTime.Today.AddDays(-_rnd.Next(1, 365)).AddHours(_rnd.Next(0, 24)).AddMinutes(_rnd.Next(0, 60));
            OrderCount = _rnd.Next(0, 100);
            OrderTotal = Math.Round(_rnd.NextDouble() * 10000.00, 2);
            Active = _rnd.NextDouble() >= .5;
        }

        #endregion

        #region ** object model

        public int Id
        {
            get { return _id; }
            set
            {
                if (value != _id)
                {
                    _id = value;
                    OnPropertyChanged();
                }
            }
        }

        public string FirstName
        {
            get { return _first; }
            set
            {
                if (value != _first)
                {
                    _first = value;
                    OnPropertyChanged();
                    OnPropertyChanged("Name");
                }
            }
        }

        public string LastName
        {
            get { return _last; }
            set
            {
                if (value != _last)
                {
                    _last = value;
                    OnPropertyChanged();
                    OnPropertyChanged("Name");
                }
            }
        }

        public string Address
        {
            get { return _address; }
            set
            {
                if (value != _address)
                {
                    _address = value;
                    OnPropertyChanged();
                }
            }
        }

        public string City
        {
            get { return _city; }
            set
            {
                if (value != _city)
                {
                    _city = value;
                    OnPropertyChanged();
                }
            }
        }

        public int CountryId
        {
            get { return _countryId; }
            set
            {
                if (value != _countryId && value > -1 && value < _countries.Length)
                {
                    _countryId = value;
                    //_city = _countries[_countryId].Value.First();
                    OnPropertyChanged();
                    OnPropertyChanged("Country");
                    OnPropertyChanged("City");
                }
            }
        }

        public string PostalCode
        {
            get { return _postalCode; }
            set
            {
                if (value != _postalCode)
                {
                    _postalCode = value;
                    OnPropertyChanged();
                }
            }
        }

        public string Email
        {
            get { return _email; }
            set
            {
                if (value != _email)
                {
                    _email = value;
                    OnPropertyChanged();
                }
            }
        }

        public DateTime LastOrderDate
        {
            get { return _lastOrderDate; }
            set
            {
                if (value != _lastOrderDate)
                {
                    _lastOrderDate = value;
                    OnPropertyChanged();
                }
            }
        }

        public TimeSpan LastOrderTime
        {
            get
            {
                return LastOrderDate.TimeOfDay;
            }
        }

        public int OrderCount
        {
            get { return _orderCount; }
            set
            {
                if (value != _orderCount)
                {
                    _orderCount = value;
                    OnPropertyChanged();
                }
            }
        }

        public double OrderTotal
        {
            get { return _orderTotal; }
            set
            {
                if (value != _orderTotal)
                {
                    _orderTotal = value;
                    OnPropertyChanged();
                }
            }
        }

        public bool Active
        {
            get { return _active; }
            set
            {
                if (value != _active)
                {
                    _active = value;
                    OnPropertyChanged();
                }
            }
        }

        public string Name
        {
            get { return string.Format("{0} {1}", FirstName, LastName); }
        }

        public string Country
        {
            get { return _countries[_countryId].Key; }
        }

        public double OrderAverage
        {
            get { return OrderTotal / (double)OrderCount; }
        }

        #endregion

        #region ** implementation

        // ** utilities
        static string GetRandomString(string[] arr)
        {
            return arr[_rnd.Next(arr.Length)];
        }
        static string GetName()
        {
            return string.Format("{0} {1}", GetRandomString(_firstNames), GetRandomString(_lastNames));
        }

        // ** static list provider
        public static ObservableCollection<Customer> GetCustomerList(int count)
        {
            var list = new ObservableCollection<Customer>();
            for (int i = 0; i < count; i++)
            {
                list.Add(new Customer(i));
            }
            return list;
        }

        private static string GetRandomAddress()
        {
            if (_rnd.NextDouble() > 0.9)
                return string.Format("{0} {1} {2} {3}", _rnd.Next(1, 999), GetRandomString(_streetNames), GetRandomString(_streetTypes), GetRandomString(_streetOrientation));
            else
                return string.Format("{0} {1} {2}", _rnd.Next(1, 999), GetRandomString(_streetNames), GetRandomString(_streetTypes));
        }

        // ** static value providers
        public static KeyValuePair<int, string>[] GetCountries() { return _countries.Select((p, index) => new KeyValuePair<int, string>(index, p.Key)).ToArray(); }
        public static string[] GetFirstNames() { return _firstNames; }
        public static string[] GetLastNames() { return _lastNames; }

        #endregion

        #region ** INotifyPropertyChanged Members

        // this interface allows bounds controls to react to changes in the data objects.
        public event PropertyChangedEventHandler PropertyChanged;

        private void OnPropertyChanged(string propertyName = "")
        {
            OnPropertyChanged(new PropertyChangedEventArgs(propertyName));
        }

        protected void OnPropertyChanged(PropertyChangedEventArgs e)
        {
            if (PropertyChanged != null)
                PropertyChanged(this, e);
        }

        #endregion

        #region IEditableObject Members

        // this interface allows transacted edits (user can press escape to restore previous values).

        Customer _clone;
        public void BeginEdit()
        {
            _clone = (Customer)this.MemberwiseClone();
        }

        public void EndEdit()
        {
            _clone = null;
        }

        public void CancelEdit()
        {
            if (_clone != null)
            {
                foreach (var p in this.GetType().GetProperties())
                {
                    if (p.CanRead && p.CanWrite)
                    {
                        p.SetValue(this, p.GetValue(_clone, null), null);
                    }
                }
            }
        }

        #endregion
    }
}