// This file is part of YamlDotNet - A .NET library for YAML.
// Copyright (c) Antoine Aubry and contributors
//
// 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.Runtime.Serialization;
using YamlDotNet.Core;
using YamlDotNet.Core.Events;
using YamlDotNet.Serialization.Utilities;

namespace YamlDotNet.Serialization.NodeDeserializers
{
    public sealed class ObjectNodeDeserializer : INodeDeserializer
    {
        private readonly IObjectFactory objectFactory;
        private readonly ITypeInspector typeDescriptor;
        private readonly bool ignoreUnmatched;

        public ObjectNodeDeserializer(IObjectFactory objectFactory, ITypeInspector typeDescriptor, bool ignoreUnmatched)
        {
            this.objectFactory = objectFactory ?? throw new ArgumentNullException(nameof(objectFactory));
            this.typeDescriptor = typeDescriptor ?? throw new ArgumentNullException(nameof(typeDescriptor));
            this.ignoreUnmatched = ignoreUnmatched;
        }

        bool INodeDeserializer.Deserialize(IParser parser, Type expectedType, Func<IParser, Type, object?> nestedObjectDeserializer, out object? value)
        {
            if (!parser.TryConsume<MappingStart>(out var mapping))
            {
                value = null;
                return false;
            }

            // Strip off the nullable type, if present. This is needed for nullable structs.
            var implementationType = Nullable.GetUnderlyingType(expectedType) ?? expectedType;

            value = objectFactory.Create(implementationType);
            while (!parser.TryConsume<MappingEnd>(out var _))
            {
                var propertyName = parser.Consume<Scalar>();
                try
                {
                    var property = typeDescriptor.GetProperty(implementationType, null, propertyName.Value, ignoreUnmatched);
                    if (property == null)
                    {
                        parser.SkipThisAndNestedEvents();
                        continue;
                    }

                    var propertyValue = nestedObjectDeserializer(parser, property.Type);
                    if (propertyValue is IValuePromise propertyValuePromise)
                    {
                        var valueRef = value;
                        propertyValuePromise.ValueAvailable += v =>
                        {
                            var convertedValue = TypeConverter.ChangeType(v, property.Type);
                            property.Write(valueRef, convertedValue);
                        };
                    }
                    else
                    {
                        var convertedValue = TypeConverter.ChangeType(propertyValue, property.Type);
                        property.Write(value, convertedValue);
                    }
                }
                catch (SerializationException ex)
                {
                    throw new YamlException(propertyName.Start, propertyName.End, ex.Message);
                }
                catch (YamlException)
                {
                    throw;
                }
                catch (Exception ex)
                {
                    throw new YamlException(propertyName.Start, propertyName.End, "Exception during deserialization", ex);
                }
            }

            return true;
        }
    }
}
