/// Copyright (c) 2021 Iiro Iivanainen, Harri Linna, Jere Pakkanen, Riikka Vilavaara
/// 
/// 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.Text.Json.Serialization;

namespace CoreLibrary
{
    public class RelativeFilepath
    {
        private string FilepathAbsolute;
        public string FilepathRelative;
        public string FilepathRelativeTo;

        /// <summary>
        /// Contructor for relative filepath.
        /// </summary>
        /// <param name="path">Absolute filepath.</param>
        public RelativeFilepath(string path)
        {
            FilepathAbsolute = path;
        }

        /// <summary>
        /// JSON constructor for serializing/deserializing.
        /// </summary>
        /// <param name="filepathrelative">Relative filepath.</param>
        /// <param name="filepathrelativeto">Path that the relation is to.</param>
        [JsonConstructor]
        public RelativeFilepath(string filepathrelative, string filepathrelativeto)
        {
            FilepathRelative = filepathrelative;
            FilepathRelativeTo = filepathrelativeto;
            FilepathAbsolute = System.IO.Path.Combine(FilepathRelativeTo, FilepathRelative);
        }

        /// <summary>
        /// Set filepath to be related to a filepath.
        /// </summary>
        /// <param name="relativeTo">Path that the relation is to.</param>
        public void SetRelation(string relativeTo)
        {
            if(FilepathRelativeTo == null) FilepathRelative = System.IO.Path.GetRelativePath(relativeTo, FilepathAbsolute);
            FilepathRelativeTo = relativeTo;
            FilepathAbsolute = System.IO.Path.Combine(FilepathRelativeTo, FilepathRelative);
        }

        /// <summary>
        /// Returns the absolute filepath of the relative path file.
        /// </summary>
        /// <returns>Absolute filepath.</returns>
        public string GetPath()
        {
            return FilepathAbsolute;
        }
    }
}