//-----------------------------------------------------------------------
// -----------------------------------------------------------------------
// file="ExpElementInstance"
// 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 System;
using System.Collections.Generic;
using System.IO;
using System.Runtime.CompilerServices;
using System.Text;

namespace StgSharp.Script.Express
{
    [Flags]
    public enum ExpElementType : int
    {

        Void = 0,
        Const = 1,
        Entity = 2,
        Type = 4,
        Function = 8,
        Section = 16,
        Expression = 32,
        Rule = 64,
        Procedure = 128,
        Collection = 256,

    }

    public abstract class ExpElementInstance : ExpSyntaxNode
    {

        protected ExpElementInstance(Token source)
            : base(source)
        {
            CodeConvertTemplate = source.Value;
        }

        public bool IsLiteral { get; init; }

        public ExpElementType ElementType { get; }

        public override ExpSyntaxNode Left => Empty;

        public override ExpSyntaxNode Right => Empty;

        public abstract string TypeName { get; }

        public static ExpElementInstance CreateLiteral(Token t)
        {
            if (int.TryParse(t.Value, out int _int))
            {
                return new ExpIntNode(t, _int, true);
            } else if (float.TryParse(t.Value, out float _float))
            {
                return new ExpRealNumberNode(t, _float, true);
            } else if (bool.TryParse(t.Value, out bool _bool))
            {
                return new ExpBoolNode(t, _bool, true);
            } else if (ExpLogic.TryParse(t.Value, out ExpLogic _logic))
            {
                return new ExpLogicValueNode(t, _logic, true);
            } else
            {
                return new ExpStringNode(t, t.Value, true);
            }
        }

        public ExpInstanceReferenceNode MakeReference(Token t)
        {
            return new ExpInstanceReferenceNode(t, this);
        }

        public static bool TryCreateLiteral(Token t, out ExpElementInstance instance)
        {
            if (int.TryParse(t.Value, out int _int))
            {
                instance = new ExpIntNode(t, _int, true);
                return true;
            } else if (float.TryParse(t.Value, out float _float))
            {
                instance = new ExpRealNumberNode(t, _float, true);
                return true;
            } else if (bool.TryParse(t.Value, out bool _bool))
            {
                instance = new ExpBoolNode(t, _bool, true);
                return true;
            } else if (ExpLogic.TryParse(t.Value, out ExpLogic _logic))
            {
                instance = new ExpLogicValueNode(t, _logic, true);
                return true;
            } else if (t.Flag == TokenFlag.String)
            {
                instance = new ExpStringNode(t, t.Value, true);
                return true;
            }
            instance = null!;
            return false;
        }

        public bool TryGetMember(string name, out ExpSyntaxNode node)
        {
            return EqualityTypeConvert.TryGetMember(name, out node);
        }

    }
}