//
// ProjectItemGroupElement.cs
//
// Author:
//   Leszek Ciesielski (skolima@gmail.com)
//
// (C) 2011 Leszek Ciesielski
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//

using System;
using System.Collections.Generic;
using System.Linq;
using System.Xml;
using Microsoft.Build.Internal;

namespace Microsoft.Build.Construction
{
        [System.Diagnostics.DebuggerDisplayAttribute ("#Items={Count} Condition={Condition} Label={Label}")]
        public class ProjectItemGroupElement : ProjectElementContainer
        {
                public ProjectItemElement AddItem (string itemType, string include)
                {
                        return AddItem (itemType, include, null);
                }

                public ProjectItemElement AddItem (string itemType, string include,
                                                   IEnumerable<KeyValuePair<string, string>> metadata)
                {
                        var item = ContainingProject.CreateItemElement (itemType, include);
                        if (metadata != null)
                                foreach (var data in metadata)
                                        item.AddMetadata (data.Key, data.Value);
                        var lastChild = LastChild;
                        foreach (var existingItem in Items) {
                                var compare = string.Compare (item.ItemType, existingItem.ItemType,
                                        StringComparison.OrdinalIgnoreCase);
                                
                                if (compare == 0) {
                                        if (string.Compare (item.Include, existingItem.Include,
                                                StringComparison.OrdinalIgnoreCase) >= 0)
                                                continue;
                                        lastChild = existingItem.PreviousSibling;
                                        break;
                                }
                                
                                if (compare < 0) {
                                        lastChild = existingItem.PreviousSibling;
                                        break;
                                }
                        }
                        InsertAfterChild (item, lastChild);
                        return item;
                }

                internal ProjectItemGroupElement (ProjectRootElement containingProject)
                {
                        ContainingProject = containingProject;
                }

                public ICollection<ProjectItemElement> Items {
                        get { return new CollectionFromEnumerable<ProjectItemElement> (
                                new FilteredEnumerable<ProjectItemElement> (Children)); }
                }

                internal override string XmlName {
                        get { return "ItemGroup"; }
                }

                internal override ProjectElement LoadChildElement (XmlReader reader)
                {
                        var item = ContainingProject.CreateItemElement (reader.LocalName);
                        AppendChild (item);
                        return item;
                }
        }
}