//-----------------------------------------------------------------------
// <copyright file="FilterFileAccess.cs" company="bedug.com">
//     Copyright © 2012 Nils Hammar. All rights reserved.
// </copyright>
//-----------------------------------------------------------------------
/*
 * Software to access vehicle information via the OBD-II connector.
 * 
 * Copyright © 2012 Nils Hammar
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU 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 General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 * 
 * Alternative licensing is possible, see the licensing document.
 * 
 * The above text may not be removed or modified.
 */

namespace DataSource.FileAccess
{
    using System;
    using System.Collections.Generic;
    using System.IO;
    using System.Windows.Forms;
    using System.Xml.Serialization;
    using global::SharedObjects;
    using global::SharedObjects.Misc;

    /// <summary>
    /// Access class for filters file.
    /// </summary>
    public class FilterFileAccess : XmlParserHelper
    {
        /// <summary>
        /// Name of file with data.
        /// </summary>
        private string fileName;

        /// <summary>
        /// Gets List of filters.
        /// </summary>
        private List<XmlClass.filter> filtersInt = null;

        /// <summary>
        /// Gets List of filters.
        /// </summary>
        public IList<XmlClass.filter> filters
        {
            get { return this.filtersInt; }
        }

        /// <summary>
        /// Initializes a new instance of the <see cref="FilterFileAccess" /> class.
        /// </summary>
        /// <param name="iLogging">Logging instance.</param>
        /// <param name="fileName">File name to use.</param>
        /// <param name="dataFileDir">Data file directory path.</param>
        public FilterFileAccess(ILogging iLogging, string fileName, string dataFileDir)
            : base(iLogging, dataFileDir)
        {
            this.fileName = fileName;
            this.filtersInt = new List<XmlClass.filter>();
        }

        /// <summary>
        /// Save data to file.
        /// </summary>
        /// <returns>'true' at success.</returns>
        public bool save()
        {
            bool success = false;
            XmlSerializer xms = new XmlSerializer(this.filtersInt.GetType());

            xms.UnknownNode += new XmlNodeEventHandler(xms_UnknownNode);
            xms.UnknownAttribute += new XmlAttributeEventHandler(xms_UnknownAttribute);
            xms.UnknownElement += new XmlElementEventHandler(xms_UnknownElement);
            xms.UnreferencedObject += new UnreferencedObjectEventHandler(xms_UnreferencedObject);

            TextWriter writer = null;
            try
            {
                writer = new StreamWriter(this.dataFileDir + this.fileName);
                xms.Serialize(writer, this.filtersInt);
                success = true;
            }
            catch (Exception ex)
            {
                MessageBox.Show(
                    ex.Message,
                    "Save failed",
                    MessageBoxButtons.OK,
                    MessageBoxIcon.Hand);
            }
            finally
            {
                if (writer != null)
                {
                    writer.Close();
                }
            }

            return success;
        }

        /// <summary>
        /// Load data from file.
        /// </summary>
        public void load()
        {
            this.iLogging.appendText("Filters Modes." + "\r\n");

            this.filtersInt = new List<XmlClass.filter>();
            XmlSerializer xms = new XmlSerializer(this.filtersInt.GetType());

            xms.UnknownNode += new XmlNodeEventHandler(xms_UnknownNode);
            xms.UnknownAttribute += new XmlAttributeEventHandler(xms_UnknownAttribute);
            xms.UnknownElement += new XmlElementEventHandler(xms_UnknownElement);
            xms.UnreferencedObject += new UnreferencedObjectEventHandler(xms_UnreferencedObject);

            StreamReader sr = null;
            try
            {
                sr = new StreamReader(this.dataFileDir + this.fileName);
                this.filtersInt = (List<XmlClass.filter>)xms.Deserialize(sr);
            }
            catch (Exception ex)
            {
                MessageBox.Show(
                    ex.Message,
                    "Load failed",
                    MessageBoxButtons.OK,
                    MessageBoxIcon.Hand);
            }
            finally
            {
                if (sr != null)
                {
                    sr.Close();
                }
            }

            this.filtersInt.Sort(Utils.filter_sorter);
            this.iLogging.appendText(this.filtersInt.Count + " Filters Loaded from XML file." + "\r\n");
        }
    }
}