/****************************************************************************
**
** Copyright (C) 2021 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt VS Tools.
**
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** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
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using Microsoft.VisualStudio.ProjectSystem;
using Microsoft.VisualStudio.ProjectSystem.Properties;
using Microsoft.Internal.VisualStudio.PlatformUI;
using System;
using System.ComponentModel.Composition;
using System.Linq;
using System.Threading.Tasks;

namespace QtVsTools.QtMsBuild
{
    using QtVsTools.Core;

    [Export(typeof(IPropertyPageUIValueEditor))]
    [ExportMetadata("Name", "QtModulesEditor")]
    [AppliesTo("IntegratedConsoleDebugging")]
    internal sealed class QtModulesEditor : IPropertyPageUIValueEditor
    {
        public async Task<object> EditValueAsync(
            IServiceProvider serviceProvider,
            IProperty ruleProperty,
            object currentValue)
        {
            await Task.Yield();

            var modules = QtModules.Instance.GetAvailableModules()
                .Where(x => !string.IsNullOrEmpty(x.proVarQT))
                .Select(x => new QtModulesPopup.Module
                {
                    Id = x.Id,
                    Name = x.Name,
                    IsReadOnly = !x.Selectable,
                    QT = x.proVarQT.Split(' ').ToHashSet(),
                })
                .ToList();

            var allQT = modules.SelectMany(x => x.QT).ToHashSet();
            var selectedQT = currentValue.ToString().Split(';').ToHashSet();
            var extraQT = selectedQT.Except(allQT);

            foreach (var module in modules)
                module.IsSelected = module.QT.Intersect(selectedQT).Count() == module.QT.Count;

            var popup = new QtModulesPopup();
            popup.SetModules(modules);

            if (popup.ShowModal().GetValueOrDefault()) {
                selectedQT = modules
                    .Where(x => x.IsSelected)
                    .SelectMany(x => x.QT)
                    .Union(extraQT)
                    .ToHashSet();
            }
            return string.Join(";", selectedQT);
        }
    }
}