using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Päevaküsimus.Models;

namespace Päevaküsimus
{
    public class MainWindowVM : NotificationBase
    {
        public ObservableCollection<Question> questions { get; set; }
        private Question _seleceQuestion;
        public Question selectedQuestion {
            get { return _seleceQuestion;}
            set
            {
                _seleceQuestion = value;
                NotifyPropertyChanged();
            }
        }

        private Question _dayQuestion;
        public Question dayQuestion
        {
            get { return _dayQuestion; }
            set
            {
                _dayQuestion = value;
                NotifyPropertyChanged();
            }
        }

        private Random _rnd;

        public MainWindowVM()
        {
            this._rnd = new Random();
            this.questions = SerializationService.DeSerialize();
            if (this.questions == null)
            {
                this.questions = new ObservableCollection<Question>();
                var question = new Question("Lisa uus küsimus");
                this.questions.Add(question);
            }
            App.mwvm = this;
        }

        public Question CreateNewQuestion()
        {
            var question = new Question("Ja minu uueks küsimuseks on?");
            question.AddAnswer(new Answer("Õige vastus 1", true));
            foreach (var answer in new[] { "Vale vastus 1", "Vale vastus 2", "Vale vastus 3", "Vale vastus 4" })
            {
                question.AddAnswer(new Answer(answer));
            }
            this.questions.Insert(1, question);
            this.selectedQuestion = question;
            return question;
        }

        public Question GetQuestionOfTheDay()
        {
            try
            {
                return this.questions.ElementAt(this._rnd.Next(1, this.questions.Count));
            }
            catch (ArgumentOutOfRangeException e)
            {
                return new Question("Palun lisa süsteemi mõni küsimus!");
            }
        }


    }
}