// Copyright (C) Stichting Deltares 2016. All rights reserved.
//
// This file is part of Ringtoets.
//
// Ringtoets 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/>.
//
// All names, logos, and references to "Deltares" are registered trademarks of
// Stichting Deltares and remain full property of Stichting Deltares at all times.
// All rights reserved.

using System;
using System.Collections.Generic;
using System.Windows.Forms;
using Core.Common.Base;
using Core.Common.Gui.Commands;
using Ringtoets.Common.Data.AssessmentSection;
using Ringtoets.Common.IO.ReferenceLines;
using Ringtoets.Common.Service;
using Ringtoets.Integration.Plugin.Properties;
using Ringtoets.Integration.Service;
using CoreCommonBaseResources = Core.Common.Base.Properties.Resources;

namespace Ringtoets.Integration.Plugin.Handlers
{
    /// <summary>
    /// Class responsible for replacing a <see cref="ReferenceLine"/> on a <see cref="IAssessmentSection"/>.
    /// </summary>
    public class ReferenceLineReplacementHandler : IReferenceLineReplaceHandler
    {
        private readonly IViewCommands viewCommands;
        private readonly Queue<object> removedObjects = new Queue<object>();

        /// <summary>
        /// Creates a new instance of <see cref="ReferenceLineReplacementHandler"/>.
        /// </summary>
        /// <param name="viewCommands">The view commands used to close views for removed data.</param>
        /// <exception cref="ArgumentNullException">Thrown when <paramref name="viewCommands"/>
        /// is <c>null</c>.</exception>
        public ReferenceLineReplacementHandler(IViewCommands viewCommands)
        {
            if (viewCommands == null)
            {
                throw new ArgumentNullException(nameof(viewCommands));
            }
            this.viewCommands = viewCommands;
        }

        public bool ConfirmReplace()
        {
            DialogResult result = MessageBox.Show(Resources.ReferenceLineReplacementHandler_Confirm_clear_referenceLine_dependent_data,
                                                  CoreCommonBaseResources.Confirm,
                                                  MessageBoxButtons.OKCancel);
            return result == DialogResult.OK;
        }

        public IEnumerable<IObservable> Replace(IAssessmentSection section, ReferenceLine newReferenceLine)
        {
            removedObjects.Clear();

            ClearResults results = RingtoetsDataSynchronizationService.ClearReferenceLine(section);
            foreach (object removedObject in results.RemovedObjects)
            {
                removedObjects.Enqueue(removedObject);
            }
            
            section.ReferenceLine = newReferenceLine;
            return results.ChangedObjects;
        }

        public void DoPostReplacementUpdates()
        {
            while (removedObjects.Count > 0)
            {
                viewCommands.RemoveAllViewsForItem(removedObjects.Dequeue());
            }
        }
    }
}