//-----------------------------------------------------------------------
// -----------------------------------------------------------------------
// file="RegexIR"
// Project: StgSharp
// AuthorGroup: Nitload
// Copyright (c) Nitload. 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.Linq;
using System.Text;
using System.Threading.Tasks;

namespace StgSharp.RegularAnalysis.TextRegex
{
    internal enum RegexIRCommand
    {

        Search = 0,
        Jump = 1,
        Compare = 2,
        Check = 3,
        Uncheck = 4,
        Span = 5,
        Define = 6,
        Assign = 7,
        Back = 8,

    }

    internal abstract class RegexIR
    {

        internal abstract RegexIRCommand Command { get; }

        internal abstract void Execute();

    }

    /// <summary>
    ///   Searches for a certain string pattern or charset from current position.
    /// </summary>
    internal sealed class RegexSearchStringIR(
                          string pattern
    ) : RegexIR
    {

        public string Pattern { get; } = pattern;

        internal override RegexIRCommand Command => RegexIRCommand.Search;

        internal override void Execute()
        {
            throw new NotImplementedException();
        }

    }

    internal sealed class RegexSearchCharsetIR(
                          string charset
    ) : RegexIR
    {

        public string Charset { get; } = charset;

        internal override RegexIRCommand Command => RegexIRCommand.Search;

        internal override void Execute()
        {
            throw new NotImplementedException();
        }

    }

    internal sealed class RegexSearchCharIR(
                          char c
    ) : RegexIR
    {

        public char target { get; } = c;

        internal override RegexIRCommand Command => RegexIRCommand.Search;

        internal override void Execute()
        {
            throw new NotImplementedException();
        }

    }

    /// <summary>
    ///   JUMP to a certain instruction index.
    /// </summary>
    /// <param name="target">
    ///
    /// </param>
    internal sealed class RegexJumpIR(
                          int target
    ) : RegexIR
    {

        public int TargetIndex { get; } = target;

        internal override RegexIRCommand Command => RegexIRCommand.Jump;

        internal override void Execute()
        {
            throw new NotImplementedException();
        }

    }

    internal sealed class RegexBackIR(
                          int index
    ) : RegexIR
    {

        public int Target { get; } = index;

        internal override RegexIRCommand Command => RegexIRCommand.Back;

        internal override void Execute()
        {
            throw new NotImplementedException();
        }

    }

    internal sealed class RegexCompareIR(
                          int success,
                          int fail
    ) : RegexIR
    {

        public int SuccessCase { get; } = success;

        public int FailCase { get; } = fail;

        internal override RegexIRCommand Command => RegexIRCommand.Compare;

        internal override void Execute()
        {
            throw new NotImplementedException();
        }

    }

    internal sealed class RegexCheckIR : RegexIR
    {

        internal override RegexIRCommand Command => RegexIRCommand.Check;

        internal override void Execute()
        {
            throw new NotImplementedException();
        }

    }

    internal sealed class RegexUncheckIR : RegexIR
    {

        internal override RegexIRCommand Command => RegexIRCommand.Check;

        internal override void Execute()
        {
            throw new NotImplementedException();
        }

    }

    internal sealed class RegexSpanIR(
                          string name
    ) : RegexIR
    {

        public string Name { get; } = name;

        internal override RegexIRCommand Command => RegexIRCommand.Span;

        internal override void Execute()
        {
            throw new NotImplementedException();
        }

    }

    internal sealed class RegexDefineCommand(
                          string name
    ) : RegexIR
    {

        public string Name { get; } = name;

        internal override RegexIRCommand Command => RegexIRCommand.Define;

        internal override void Execute()
        {
            throw new NotImplementedException();
        }

    }

    internal sealed class RegexAssignCommand<T>(
                          string name,
                          T value
    ) : RegexIR
    {

        public string Name { get; } = name;

        public T Value { get; } = value;

        internal override RegexIRCommand Command => RegexIRCommand.Assign;

        internal override void Execute()
        {
            throw new NotImplementedException();
        }

    }
}