using System;
using System.Collections.Generic;
using System.Linq;
using Avalonia.Controls;
using AvaloniaTeachersDB.Models;
using AvaloniaTeachersDB.Views;
using MsBox.Avalonia.Enums;
using MsBox.Avalonia;
using ReactiveUI;
using Tmds.DBus.Protocol;
using System.Collections.ObjectModel;

namespace AvaloniaTeachersDB.ViewModels
{
    public class AddTeacherViewModel : ReactiveObject
    {
        public static _43pToropovaContext DBConnection = new _43pToropovaContext();

        private string _name;
        private string _surname;
        private string _patronymic;
        private string _mail;
        private string _phone;

        private DateTimeOffset _birthday = new DateTimeOffset(DateTime.Now);  
        private SchoolSubject _selectSubject;
        private int _selectIndexSubject;

        private string _exp;

        private bool _genderM = true;
        private bool _enableBTN = false;

        //private List<SchoolSubject> _collSubSelect = new List<SchoolSubject>();
        private ObservableCollection<SchoolSubject> _collSubSelect = new ObservableCollection<SchoolSubject>();

        public string TName { get => _name; set => this.RaiseAndSetIfChanged(ref _name, value); }
        public string TSurname { get => _surname; set => this.RaiseAndSetIfChanged(ref _surname, value); }
        public string TPatronymic { get => _patronymic; set => this.RaiseAndSetIfChanged(ref _patronymic, value); }
        public DateTimeOffset TBirthday { get => _birthday; set => this.RaiseAndSetIfChanged(ref _birthday, value); }
        public string TMail { get => _mail; set => this.RaiseAndSetIfChanged(ref _mail, value); }
        public string TPhone { get => _phone; set => this.RaiseAndSetIfChanged(ref _phone, value); }
        public string TExp { get => _exp; set => this.RaiseAndSetIfChanged(ref _exp, value); }
        public bool TGenderM { get => _genderM; set => this.RaiseAndSetIfChanged(ref _genderM, value); }
        public bool EnableBTN { get => _enableBTN; set => this.RaiseAndSetIfChanged(ref _enableBTN, value); }

        public ObservableCollection<SchoolSubject> CollSubSelect { get => _collSubSelect; set => this.RaiseAndSetIfChanged(ref _collSubSelect, value); }
        public List<SchoolSubject> CollSub => DBConnection.SchoolSubjects.ToList();

        private bool CheckNotNull()
        {
            if (TName == null && TSurname == null && TPatronymic == null)
            {
                var box = MessageBoxManager.GetMessageBoxStandard("Error", "нет фио");
                box.ShowAsync();
                return false;
            }

            if (TMail == null)
            {
                var box = MessageBoxManager.GetMessageBoxStandard("Error", "нет почты");
                box.ShowAsync();
                return false;
            }
            if(CollSubSelect.Count<=0)
            {
                var box = MessageBoxManager.GetMessageBoxStandard("Error", "нет преподаваемых предметов");
                box.ShowAsync();
                return false;

            }               
            return true;
        }

        public SchoolSubject SelectSubject
        {
            get => _selectSubject;
            set
            {
                
                int f = 0;
                foreach (var item in CollSubSelect)
                {
                    if (item == value)
                    {
                        f = 1;
                    }
                }
                if (f == 0)
                    CollSubSelect.Add(value);
               
            }
        }
        /*
        public int SelectIndexSubject
        { 
            get => _selectIndexSubject; 
            set
            {
                var mews = MessageBoxManager.GetMessageBoxStandard("ff", value.ToString());
                mews.ShowAsync();
                SchoolSubject tmp;
                if (CollSubSelect.Count>0)
                {
                    int ind= 0;
                    foreach(var item in CollSubSelect)
                    {
                        if (value == ind)
                        {
                            tmp = item;
                            break;
                        }
                        ind++;
                    }
                    CollSubSelect.RemoveAt(ind);
                }
            } 
        }
        */
        public bool AddNewTeacher()
        {
            if (CheckNotNull())
            {               
                int indG = 1;
                int exp;
                //DateTime tmp = new DateTime(TBirthday.Year, TBirthday.Month, TBirthday.Day);
                string birtdate = TBirthday.Year +"-"+ TBirthday.Month +"-"+ TBirthday.Day;
                if (TGenderM == false)
                    indG = 2;
                if (TExp == null)
                    exp = 0;
                else
                    exp = Convert.ToInt32(TExp);
                Teacher nT = new Teacher()
                {                    
                    NameTeacher = TName,
                    SurnameTeacher = TSurname,
                    PatronymicTeacher = TPatronymic,                    
                    BirthdayTeacher = DateOnly.Parse(birtdate),
                    Mail = TMail,
                    Phone = TPhone,
                    ExperienceTeacher = exp,
                    IdGender = indG
                };
                DBConnection.Teachers.Add(nT);
                DBConnection.SaveChanges();   
                foreach(var item in CollSubSelect)
                {
                    TeachersSubject ts = new TeachersSubject()
                    {
                        IdTeacher = nT.IdTeachers,
                        IdSubjects = item.IdSubjects
                    };
                    DBConnection.TeachersSubjects.Add(ts);
                }
                DBConnection.SaveChanges();
                CollSubSelect.Clear();
                return true;
            } 
            return false;
        }
    }
}