//-----------------------------------------------------------------------
// -----------------------------------------------------------------------
// file="StepDataParser.cs"
// 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 Microsoft.CodeAnalysis.CSharp.Syntax;

using StgSharp.Mathematics;
using StgSharp.Script.Express;

using System;
using System.Collections.Generic;
using System.Text;
using System.Text.RegularExpressions;
using System.Xml.Linq;

namespace StgSharp.Model.Step
{
    internal static partial class StepDataParser
    {

        private static Regex _stringParser = GetStringParser();
        private static Regex _vectorParser = GetVectorParser();
        private static Type _implementorInterface = typeof(IExpConvertableFrom<>);

        public static StepRepresentationItem Implement(
                                             StepRepresentationItem left,
                                             StepRepresentationItem right)
        {
            Type tLeft = left.GetType(),
                tRight = right.GetType(),
                iLeft = _implementorInterface.MakeGenericType(tLeft),
                iRight = _implementorInterface.MakeGenericType(tRight);
            if (tLeft.IsAssignableTo(iRight))
            {
                ((dynamic)left).FromInstance((dynamic)right);
                return left;
            }
            if (tRight.IsAssignableTo(iLeft))
            {
                ((dynamic)right).FromInstance((dynamic)left);
                return right;
            }
            throw new InvalidCastException(
                $"{tLeft.Name } and { tRight.Name } has no implementation or inheritance relationship");
        }

        public static DateTime ToDateTime(string source)
        {
            Match match = _stringParser.Match(source);
            if (match.Success) {
                return DateTime.Parse(match.Groups["value"].Value);
            }
            throw new InvalidCastException();
        }

        public static string ToString(string source)
        {
            Match match = _stringParser.Match(source);
            if (match.Success) {
                return match.Groups["value"].Value;
            }
            return string.Empty;
        }

        public static Vec3 ToVector3D(ExpNodePresidentEnumerator enumerator)
        {
            enumerator.AssertEnumeratorCount(3);
            Vec3 result = new Vec3();
            ExpSyntaxNode node = enumerator.Current;
            if (node is ExpRealNumberNode x)
            {
                result.X = x.Value;
                enumerator.MoveNext();
            } else
            {
                throw new InvalidCastException();
            }
            if (node is ExpRealNumberNode y)
            {
                result.Y = y.Value;
                enumerator.MoveNext();
            } else
            {
                throw new InvalidCastException();
            }
            if (node is ExpRealNumberNode z)
            {
                result.Z = z.Value;
                enumerator.MoveNext();
            } else
            {
                throw new InvalidCastException();
            }
            return result;
        }

        public static Vec3 ToVector3D(ExpSyntaxNode node)
        {
            Vec3 result = new Vec3();
            if (node is ExpTupleNode)
            {
                ToVector3DPrivate(node.Right, ref result);
            } else
            {
                ToVector3DPrivate(node, ref result);
            }
            return result;
        }

        public static (int, int?) ToVersion(string source)
        {
            Match match = _stringParser.Match(source);
            if (match.Success)
            {
                string data = match.Groups["value"].Value;
                if (data.Contains(';'))
                {
                    string[] subData = data.Split(';');
                    return (int.Parse(subData[0]), int.Parse(subData[1]));
                }
                return (int.Parse(data), null);
            }
            return (-1,-1);
        }

        [GeneratedRegex(@"(\(\s?'|')\s*(?<value>.+)\s*('\s*\)|')", RegexOptions.Singleline)]
        private static partial Regex GetStringParser();

        [GeneratedRegex(
                @"^\(\s+(?<x>-?[0-9]+\.[0-9]+),\s+(?<y>-?[0-9]+\.[0-9]+),\s+(?<z>-?[0-9]+\.[0-9]+)\s+\)$",
                RegexOptions.Singleline)]
        private static partial Regex GetVectorParser();

        private static void ToVector3DPrivate(ExpSyntaxNode node, ref Vec3 result)
        {
            ExpSyntaxNode begin = node;
            if (node is ExpRealNumberNode x)
            {
                result.X = x.Value;
                node = node.Next;
            } else
            {
                throw new InvalidCastException();
            }
            if (node is ExpRealNumberNode y)
            {
                result.Y = y.Value;
                node = node.Next;
            } else
            {
                throw new InvalidCastException();
            }
            if (node is ExpRealNumberNode z)
            {
                result.Z = z.Value;
                node = node.Next;
            } else
            {
                throw new InvalidCastException();
            }
            if (!ReferenceEquals(node, begin)) {
                throw new InvalidCastException();
            }
        }

    }
}