using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Xml.Serialization;
using LeanderShiftPlannerV2.Util;

namespace LeanderShiftPlannerV2.Model
{
    [Serializable]
    public class Person : INotifyPropertyChanged
    {
        private string _firstFirstName = null!;
        private string _surname = null!;
        private int _hours;
        private string _timeSheetSource;
        private ObservableCollection<Shift> _shifts;
        
        [XmlIgnore]
        private List<Timesheet> _timesheets;

        public event PropertyChangedEventHandler? PropertyChanged;

        protected void OnPropertyChanged(string propertyName)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }

        public Person()
        {
            _shifts = new ObservableCollection<Shift>();
            _timesheets = new List<Timesheet>();
        }

        public Person(string firstFirstName, string surname, int hours, string timeSheetSource)
        {
            this._firstFirstName = firstFirstName;
            this._surname = surname;
            this._hours = hours;
            this._timeSheetSource = timeSheetSource;
            _shifts = new ObservableCollection<Shift>();
            _timesheets = new List<Timesheet>();
        }

        public string FirstName
        {
            get => _firstFirstName;
            set
            {
                _firstFirstName = value;
                OnPropertyChanged(nameof(FirstName));
            }
        }
        
        public string Surname
        {
            get => _surname;
            set
            {
                _surname = value;
                OnPropertyChanged(nameof(Surname));
            }
        }

        public int Hours
        {
            get => _hours;
            set
            {
                _hours = value;
                OnPropertyChanged(nameof(Hours));
            }
        }

        public string TimeSheetSource
        {
            get => _timeSheetSource;
            set
            {
                _timeSheetSource = value;
                OnPropertyChanged(nameof(TimeSheetSource));
            }
        }

        [XmlIgnore]
        public string ShiftsString
        {
            get
            {
                string result = "";

                foreach (Shift shift in _shifts)
                    result += shift.Day + " " + shift.ShiftInDay + "; ";

                return result;
            }
        }

        [XmlIgnore]
        public List<Timesheet> Timesheets
        {
            get => _timesheets;
            set => _timesheets = value;
        }

        [XmlIgnore] public ObservableCollection<Shift> Shifts => _shifts;

        public void AddShift(Shift shift)
        {
            _shifts.Add(shift);
            OnPropertyChanged(nameof(ShiftsString));
        }

        public void RemoveShift(Shift shift)
        {
            _shifts.Remove(shift);
            OnPropertyChanged(nameof(ShiftsString));
        }

        public void ClearShifts()
        {
            _shifts.Clear();
            OnPropertyChanged(nameof(ShiftsString));
        }

        override
            public string ToString()
        {
            return _firstFirstName;
        }

        public Timesheet GetTimeSheetByMonth(string month)
        {
            foreach (Timesheet timesheet in _timesheets)
            {
                if (timesheet.Month == month) return timesheet;
            }
            
            return null;
        }
    }
}