//-----------------------------------------------------------------------
// -----------------------------------------------------------------------
// 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,
        Condition = 2,
        Count = 3,
        Try = 4,
        Pop = 5,

    }

    internal abstract class RegexIR
    {

        internal abstract RegexIRCommand Command { get; }

        public static RegexIR Condition(
                              int success,
                              int fail
        )
        {
            return new RegexConditionIR(success, fail);
        }

        public static RegexIR PopLevel(
                              bool isSuccess
        )
        {
            return new RegexPopIR(isSuccess);
        }

        public static RegexIR Try(
                              int count
        )
        {
            return new RegexTryIR(count);
        }

        internal abstract void Execute();

    }

    internal sealed class RegexPopIR(
                          bool isSuccess
    ) : RegexIR
    {

        public bool IsSuccess { get; } = isSuccess;

        internal override RegexIRCommand Command => RegexIRCommand.Pop;

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

    }

    /// <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 RegexSearchCharSetIR(
                          string c
    ) : RegexIR
    {

        public string 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 RegexConditionIR(
                          int success,
                          int fail
    ) : RegexIR
    {

        public int SuccessCase { get; } = success;

        public int FailCase { get; } = fail;

        internal override RegexIRCommand Command => RegexIRCommand.Condition;

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

    }

    internal sealed class RegexCountIR(
                          int min,
                          int max,
                          bool isGreedy,
                          int operation
    ) : RegexIR
    {

        public bool IsGreedy { get; } = isGreedy;

        public int Min { get; } = min;

        public int Max { get; } = max;

        public int OperationIndex { get; } = operation;

        internal override RegexIRCommand Command => throw new NotImplementedException();

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

    }

    internal sealed class RegexTryIR(
                          int count
    ) : RegexIR
    {

        public int CountOfCommand { get; } = count;

        internal override RegexIRCommand Command => RegexIRCommand.Try;

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

    }
}