// Copyright (C) Stichting Deltares 2019. All rights reserved.
//
// This file is part of the Dam Engine.
//
// The Dam Engine is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
// All names, logos, and references to "Deltares" are registered trademarks of
// Stichting Deltares and remain full property of Stichting Deltares at all times.
// All rights reserved.

using System.Collections.Generic;
using System.IO;
using Deltares.LayerOnSlopeTool.Data;
using Deltares.LayerOnSlopeTool.Importer;

namespace Deltares.LayerOnSlopeTool.LayerCreator
{
    /// <summary></summary>
    public class LayerCreator
    {
        /// <summary>Initializes a new instance of the <see cref="LayerCreator"/> class.</summary>
        /// <param name="inputFolderName">Name of the input folder.</param>
        /// <param name="geometriesFolderName">Name of the geometries folder.</param>
        /// <param name="outputFolderName">Name of the output folder.</param>
        public LayerCreator(string inputFolderName, string geometriesFolderName, string outputFolderName)
        {
            InputFolderName = inputFolderName;
            GeometriesFolderName = geometriesFolderName;
            OutputFolderName = outputFolderName;

        }

        /// <summary>Gets the name of the output folder.</summary>
        /// <value>The name of the output folder.</value>
        public string OutputFolderName { get; }

        /// <summary>Gets the name of the geometries folder.</summary>
        /// <value>The name of the geometries folder.</value>
        public string GeometriesFolderName { get;}

        /// <summary>Gets the name of the input folder.</summary>
        /// <value>The name of the input folder.</value>
        public string InputFolderName { get; }

        private List<Location> locations = new List<Location>();
        private List<SurfaceLine> surfaceLines = new List<SurfaceLine>();
        private List<string> errors;

        public void Execute()
        {
            locations = ReadLocations(InputFolderName);
            surfaceLines = ReadSurfaceLines(InputFolderName);
            ProcessLocations();
        }

        private void ProcessLocations()
        {
            var loggedLocations = new List<string>();
            foreach (var location in locations)
            {
                loggedLocations.Add(string.Format("Handling location {0} with surface line {1}", location.LocationId, location.SurfacelineId));
                SurfaceLine surfaceLine = FindSurfaceLine(location.SurfacelineId);
                var geometryCreator = new GeometryCreator(location, surfaceLine, OutputFolderName);
                geometryCreator.Execute();
            }
            WriteToLog(loggedLocations);
            throw new System.NotImplementedException();
        }

        private SurfaceLine FindSurfaceLine(string surfaceLineId)
        {
            // TODO find surfaceline with surfaceLineId
            throw new System.NotImplementedException();
        }

        private List<SurfaceLine> ReadSurfaceLines(string inputFolderName)
        {
            errors.Clear();
            if (CsvImporter.ReadSurfaceLines(inputFolderName, out surfaceLines, out errors))
            {
                return surfaceLines;
            }
            else
            {
                WriteToLog(errors);
            }
            return null;
        }

        private List<Location> ReadLocations(string inputFolderName)
        {
            errors.Clear();
            if (CsvImporter.ReadLocations(inputFolderName, out locations, out errors))
            {
                return locations;
            }
            else
            {
                WriteToLog(errors);
            }
            return null;
        }

        private void WriteToLog(List<string> linesToAdd)
        {
            const string logFile = "LayerOnSlopeTool.log";
            string fullFilePath = Path.Combine(OutputFolderName, logFile);
            File.AppendAllLines(fullFilePath, linesToAdd);
        }
    }

}