// 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 YamlDotNet.Core;

namespace YamlDotNet.Serialization.ObjectGraphVisitors
{
    public sealed class EmittingObjectGraphVisitor : IObjectGraphVisitor<IEmitter>
    {
        private readonly IEventEmitter eventEmitter;

        public EmittingObjectGraphVisitor(IEventEmitter eventEmitter)
        {
            this.eventEmitter = eventEmitter;
        }

        bool IObjectGraphVisitor<IEmitter>.Enter(IObjectDescriptor value, IEmitter context)
        {
            return true;
        }

        bool IObjectGraphVisitor<IEmitter>.EnterMapping(IObjectDescriptor key, IObjectDescriptor value, IEmitter context)
        {
            return true;
        }

        bool IObjectGraphVisitor<IEmitter>.EnterMapping(IPropertyDescriptor key, IObjectDescriptor value, IEmitter context)
        {
            return true;
        }

        void IObjectGraphVisitor<IEmitter>.VisitScalar(IObjectDescriptor scalar, IEmitter context)
        {
            eventEmitter.Emit(new ScalarEventInfo(scalar), context);
        }

        void IObjectGraphVisitor<IEmitter>.VisitMappingStart(IObjectDescriptor mapping, Type keyType, Type valueType, IEmitter context)
        {
            eventEmitter.Emit(new MappingStartEventInfo(mapping), context);
        }

        void IObjectGraphVisitor<IEmitter>.VisitMappingEnd(IObjectDescriptor mapping, IEmitter context)
        {
            eventEmitter.Emit(new MappingEndEventInfo(mapping), context);
        }

        void IObjectGraphVisitor<IEmitter>.VisitSequenceStart(IObjectDescriptor sequence, Type elementType, IEmitter context)
        {
            eventEmitter.Emit(new SequenceStartEventInfo(sequence), context);
        }

        void IObjectGraphVisitor<IEmitter>.VisitSequenceEnd(IObjectDescriptor sequence, IEmitter context)
        {
            eventEmitter.Emit(new SequenceEndEventInfo(sequence), context);
        }
    }
}