// 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.Collections.Generic;
using System.Linq;
using YamlDotNet.Core;

namespace YamlDotNet.Serialization.ObjectGraphVisitors
{
    public sealed class CustomSerializationObjectGraphVisitor : ChainedObjectGraphVisitor
    {
        private readonly IEnumerable<IYamlTypeConverter> typeConverters;
        private readonly ObjectSerializer nestedObjectSerializer;

        public CustomSerializationObjectGraphVisitor(IObjectGraphVisitor<IEmitter> nextVisitor, IEnumerable<IYamlTypeConverter> typeConverters, ObjectSerializer nestedObjectSerializer)
            : base(nextVisitor)
        {
            this.typeConverters = typeConverters != null
                ? typeConverters.ToList()
                : Enumerable.Empty<IYamlTypeConverter>();

            this.nestedObjectSerializer = nestedObjectSerializer;
        }

        public override bool Enter(IObjectDescriptor value, IEmitter context)
        {
            var typeConverter = typeConverters.FirstOrDefault(t => t.Accepts(value.Type));
            if (typeConverter != null)
            {
                typeConverter.WriteYaml(context, value.Value, value.Type);
                return false;
            }

            if (value.Value is IYamlConvertible convertible)
            {
                convertible.Write(context, nestedObjectSerializer);
                return false;
            }

#pragma warning disable 0618 // IYamlSerializable is obsolete
            if (value.Value is IYamlSerializable serializable)
            {
                serializable.WriteYaml(context);
                return false;
            }
#pragma warning restore

            return base.Enter(value, context);
        }
    }
}