//-----------------------------------------------------------------------
// -----------------------------------------------------------------------
// file="StepEntityInstanceNode"
// Project: StgSharp
// AuthorGroup: Nitload Space
// Copyright (c) Nitload Space. All rights reserved.
//     
// 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 StgSharp.Model.Step;
using StgSharp.Script;
using StgSharp.Script.Express;

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Http.Headers;
using System.Text;
using System.Threading.Tasks;

namespace StgSharp.Model.Step
{
    public class StepEntityInstanceNode : ExpSyntaxNode
    {

        private StepEntityInstanceNode(Token source) : base(source) { }

        public override ExpSyntaxNode Left => Empty;

        public override ExpSyntaxNode Right => Empty;

        public override IExpElementSource EqualityTypeConvert => StepEntityType.Source;

        public int Id { get; init; }

        public static StepEntityInstanceNode Register(Token t)
        {
            if (t.Value[0] != '#') {
                throw new ExpInvalidSyntaxException("Entity label in STEP should be # + number");
            }
            StepEntityInstanceNode node = new StepEntityInstanceNode(t)
            {
                Id = int.Parse(t.Value.AsSpan(1)),
            };
            return node;
        }

        public static StepEntityInstanceNode RegisterNull(Token t)
        {
            if (t.Value != "$") {
                throw new ExpInvalidSyntaxException(
                    $"Token {t.Value} does not represent a null entity");
            }
            StepEntityInstanceNode node = new StepEntityInstanceNode(t)
            {
                Id = 0,
            };
            return node;
        }

        public static StepEntityInstanceNode RegisterRuntimeInference(Token t)
        {
            if (t.Value != "*") {
                throw new ExpInvalidSyntaxException(
                    $"Token {t.Value} does not represent a runtime inferences entity");
            }
            StepEntityInstanceNode node = new StepEntityInstanceNode(t)
            {
                Id = -1,
            };
            return node;
        }

    }

    internal class StepEntityType : ExpTypeSource
    {

        private StepEntityType(string typeName) : base(typeName) { }

        public static StepEntityType Source { get; } = new StepEntityType("ENTITY");

    }
}