﻿// Lisimba
// Copyright (C) 2007-2016 Dust in the Wind
// 
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

using System;
using System.Collections.Generic;
using System.Linq;
using DustInTheWind.Lisimba.Business.AddressBookManagement;
using DustInTheWind.Lisimba.Business.WorkerModel;

namespace DustInTheWind.Lisimba.Wpf.Workers
{
    internal class AddressBookOpenWarningsWorker : IWorker
    {
        private readonly AddressBooks addressBooks;
        private readonly WindowSystem windowSystem;

        public AddressBookOpenWarningsWorker(AddressBooks addressBooks, WindowSystem windowSystem)
        {
            if (addressBooks == null) throw new ArgumentNullException("addressBooks");
            if (windowSystem == null) throw new ArgumentNullException("windowSystem");

            this.addressBooks = addressBooks;
            this.windowSystem = windowSystem;
        }

        public void Start()
        {
            addressBooks.AddressBookOpened += HandleAddressBookOpened;
        }

        public void Stop()
        {
            addressBooks.AddressBookOpened -= HandleAddressBookOpened;
        }

        private void HandleAddressBookOpened(object sender, AddressBookOpenedEventArgs e)
        {
            DisplayWarnings(e.Result.Warnings);
        }

        private void DisplayWarnings(IEnumerable<Exception> warnings)
        {
            if (warnings == null || !warnings.Any())
                return;

            windowSystem.DisplayWarning(warnings);
        }
    }
}
