#region License
// Copyright (c) 2007 James Newton-King
//
// 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.
#endregion

using System;
using System.Collections.Generic;
#if !HAVE_LINQ
using LC.Newtonsoft.Json.Utilities.LinqBridge;
#else
using System.Linq;
#endif
using System.Reflection;
using System.Text;
using LC.Newtonsoft.Json.Serialization;

namespace LC.Newtonsoft.Json.Utilities
{
    /// <summary>
    /// Helper class for serializing immutable collections.
    /// Note that this is used by all builds, even those that don't support immutable collections, in case the DLL is GACed
    /// https://github.com/JamesNK/Newtonsoft.Json/issues/652
    /// </summary>
    internal static class ImmutableCollectionsUtils
    {
        internal class ImmutableCollectionTypeInfo
        {
            public ImmutableCollectionTypeInfo(string contractTypeName, string createdTypeName, string builderTypeName)
            {
                ContractTypeName = contractTypeName;
                CreatedTypeName = createdTypeName;
                BuilderTypeName = builderTypeName;
            }

            public string ContractTypeName { get; set; }
            public string CreatedTypeName { get; set; }
            public string BuilderTypeName { get; set; }
        }

        private const string ImmutableListGenericInterfaceTypeName = "System.Collections.Immutable.IImmutableList`1";
        private const string ImmutableQueueGenericInterfaceTypeName = "System.Collections.Immutable.IImmutableQueue`1";
        private const string ImmutableStackGenericInterfaceTypeName = "System.Collections.Immutable.IImmutableStack`1";
        private const string ImmutableSetGenericInterfaceTypeName = "System.Collections.Immutable.IImmutableSet`1";

        private const string ImmutableArrayTypeName = "System.Collections.Immutable.ImmutableArray";
        private const string ImmutableArrayGenericTypeName = "System.Collections.Immutable.ImmutableArray`1";

        private const string ImmutableListTypeName = "System.Collections.Immutable.ImmutableList";
        private const string ImmutableListGenericTypeName = "System.Collections.Immutable.ImmutableList`1";

        private const string ImmutableQueueTypeName = "System.Collections.Immutable.ImmutableQueue";
        private const string ImmutableQueueGenericTypeName = "System.Collections.Immutable.ImmutableQueue`1";

        private const string ImmutableStackTypeName = "System.Collections.Immutable.ImmutableStack";
        private const string ImmutableStackGenericTypeName = "System.Collections.Immutable.ImmutableStack`1";

        private const string ImmutableSortedSetTypeName = "System.Collections.Immutable.ImmutableSortedSet";
        private const string ImmutableSortedSetGenericTypeName = "System.Collections.Immutable.ImmutableSortedSet`1";

        private const string ImmutableHashSetTypeName = "System.Collections.Immutable.ImmutableHashSet";
        private const string ImmutableHashSetGenericTypeName = "System.Collections.Immutable.ImmutableHashSet`1";

        private static readonly IList<ImmutableCollectionTypeInfo> ArrayContractImmutableCollectionDefinitions = new List<ImmutableCollectionTypeInfo>
        {
            new ImmutableCollectionTypeInfo(ImmutableListGenericInterfaceTypeName, ImmutableListGenericTypeName, ImmutableListTypeName),
            new ImmutableCollectionTypeInfo(ImmutableListGenericTypeName, ImmutableListGenericTypeName, ImmutableListTypeName),
            new ImmutableCollectionTypeInfo(ImmutableQueueGenericInterfaceTypeName, ImmutableQueueGenericTypeName, ImmutableQueueTypeName),
            new ImmutableCollectionTypeInfo(ImmutableQueueGenericTypeName, ImmutableQueueGenericTypeName, ImmutableQueueTypeName),
            new ImmutableCollectionTypeInfo(ImmutableStackGenericInterfaceTypeName, ImmutableStackGenericTypeName, ImmutableStackTypeName),
            new ImmutableCollectionTypeInfo(ImmutableStackGenericTypeName, ImmutableStackGenericTypeName, ImmutableStackTypeName),
            new ImmutableCollectionTypeInfo(ImmutableSetGenericInterfaceTypeName, ImmutableSortedSetGenericTypeName, ImmutableSortedSetTypeName),
            new ImmutableCollectionTypeInfo(ImmutableSortedSetGenericTypeName, ImmutableSortedSetGenericTypeName, ImmutableSortedSetTypeName),
            new ImmutableCollectionTypeInfo(ImmutableHashSetGenericTypeName, ImmutableHashSetGenericTypeName, ImmutableHashSetTypeName),
            new ImmutableCollectionTypeInfo(ImmutableArrayGenericTypeName, ImmutableArrayGenericTypeName, ImmutableArrayTypeName)
        };

        private const string ImmutableDictionaryGenericInterfaceTypeName = "System.Collections.Immutable.IImmutableDictionary`2";

        private const string ImmutableDictionaryTypeName = "System.Collections.Immutable.ImmutableDictionary";
        private const string ImmutableDictionaryGenericTypeName = "System.Collections.Immutable.ImmutableDictionary`2";

        private const string ImmutableSortedDictionaryTypeName = "System.Collections.Immutable.ImmutableSortedDictionary";
        private const string ImmutableSortedDictionaryGenericTypeName = "System.Collections.Immutable.ImmutableSortedDictionary`2";

        private static readonly IList<ImmutableCollectionTypeInfo> DictionaryContractImmutableCollectionDefinitions = new List<ImmutableCollectionTypeInfo>
        {
            new ImmutableCollectionTypeInfo(ImmutableDictionaryGenericInterfaceTypeName, ImmutableSortedDictionaryGenericTypeName, ImmutableSortedDictionaryTypeName),
            new ImmutableCollectionTypeInfo(ImmutableSortedDictionaryGenericTypeName, ImmutableSortedDictionaryGenericTypeName, ImmutableSortedDictionaryTypeName),
            new ImmutableCollectionTypeInfo(ImmutableDictionaryGenericTypeName, ImmutableDictionaryGenericTypeName, ImmutableDictionaryTypeName)
        };

        internal static bool TryBuildImmutableForArrayContract(Type underlyingType, Type collectionItemType, out Type createdType, out ObjectConstructor<object> parameterizedCreator)
        {
            if (underlyingType.IsGenericType())
            {
                Type underlyingTypeDefinition = underlyingType.GetGenericTypeDefinition();
                string name = underlyingTypeDefinition.FullName;

                ImmutableCollectionTypeInfo definition = ArrayContractImmutableCollectionDefinitions.FirstOrDefault(d => d.ContractTypeName == name);
                if (definition != null)
                {
                    Type createdTypeDefinition = underlyingTypeDefinition.Assembly().GetType(definition.CreatedTypeName);
                    Type builderTypeDefinition = underlyingTypeDefinition.Assembly().GetType(definition.BuilderTypeName);

                    if (createdTypeDefinition != null && builderTypeDefinition != null)
                    {
                        MethodInfo mb = builderTypeDefinition.GetMethods().FirstOrDefault(m => m.Name == "CreateRange" && m.GetParameters().Length == 1);
                        if (mb != null)
                        {
                            createdType = createdTypeDefinition.MakeGenericType(collectionItemType);
                            MethodInfo method = mb.MakeGenericMethod(collectionItemType);
                            parameterizedCreator = JsonTypeReflector.ReflectionDelegateFactory.CreateParameterizedConstructor(method);
                            return true;
                        }
                    }
                }
            }

            createdType = null;
            parameterizedCreator = null;
            return false;
        }

        internal static bool TryBuildImmutableForDictionaryContract(Type underlyingType, Type keyItemType, Type valueItemType, out Type createdType, out ObjectConstructor<object> parameterizedCreator)
        {
            if (underlyingType.IsGenericType())
            {
                Type underlyingTypeDefinition = underlyingType.GetGenericTypeDefinition();
                string name = underlyingTypeDefinition.FullName;

                ImmutableCollectionTypeInfo definition = DictionaryContractImmutableCollectionDefinitions.FirstOrDefault(d => d.ContractTypeName == name);
                if (definition != null)
                {
                    Type createdTypeDefinition = underlyingTypeDefinition.Assembly().GetType(definition.CreatedTypeName);
                    Type builderTypeDefinition = underlyingTypeDefinition.Assembly().GetType(definition.BuilderTypeName);

                    if (createdTypeDefinition != null && builderTypeDefinition != null)
                    {
                        MethodInfo mb = builderTypeDefinition.GetMethods().FirstOrDefault(m =>
                        {
                            ParameterInfo[] parameters = m.GetParameters();

                            return m.Name == "CreateRange" && parameters.Length == 1 && parameters[0].ParameterType.IsGenericType() && parameters[0].ParameterType.GetGenericTypeDefinition() == typeof(IEnumerable<>);
                        });
                        if (mb != null)
                        {
                            createdType = createdTypeDefinition.MakeGenericType(keyItemType, valueItemType);
                            MethodInfo method = mb.MakeGenericMethod(keyItemType, valueItemType);
                            parameterizedCreator = JsonTypeReflector.ReflectionDelegateFactory.CreateParameterizedConstructor(method);
                            return true;
                        }
                    }
                }
            }

            createdType = null;
            parameterizedCreator = null;
            return false;
        }
    }
}