///
/// Copyright (c) 2016 Sensus Metering Systems
///
using System;
using System.Collections.Generic;
using System.IO;
using System.Text;
using System.Xml.Serialization;
using System.Windows.Forms;
using ResultsBrowser.Resources;

namespace ResultsBrowser
{
    /// <summary>
    /// Class to be serialized to an XML file...
    /// Public members are filters / parts of a query.
    /// </summary>
    [XmlRootAttribute("Query")]
    public class FiltersConfig
    {
        public string[] FilterID;
        public string[] FilterData;

        [XmlIgnore]
        public int FiltersCount { get { return Math.Min((FilterID != null) ? FilterID.Length : 0,
                                                        (FilterData != null) ? FilterData.Length : 0); } }

        public string[] ResultItems;

		public string PrinterClass;
		public string PrinterCfg;

        [XmlArrayAttribute("ResultsClmnWidths")]
        public int[] ResultsClmnWidths;
        [XmlIgnore]
        public int ResultsClmnCount { get { return (ResultsClmnWidths != null) ? ResultsClmnWidths.Length : 0; } }


        public FiltersConfig()
        {
        }

		public FiltersConfig(int count)
		{
			if (count > 0)
			{
				FilterID = new string[count];
				FilterData = new string[count];
			}
		}

        /// <summary>
        /// Load public fields of this class from the XML file.
        /// </summary>
		public static FiltersConfig Load(string fileName)
        {
            try
            {
				using (TextReader reader = new StreamReader(fileName))
				{
                    FiltersConfig ls = (new XmlSerializer(typeof(FiltersConfig))).Deserialize(reader) as FiltersConfig;
                    // Copy the settings just in case De-serialize() completes OK
                    return ls;
                }
            }
            catch (Exception e)
            {
                string msg = e.Message;
				return null;
            }
        }

        /// <summary>
        /// Updates public arrays FilterID[] and FilterData[] of this serializable class.
        /// </summary>
        /// <param name="filters"></param>
        /// <returns></returns>
        public bool UpdateFromFilters(IList<Filters.IFilter> filters)
        {
            try
            {
                int cnt = filters.Count;
                FilterID = new string[cnt];
                FilterData = new string[cnt];

                StringBuilder sb = new StringBuilder();
                for (int i = 0; i < cnt; i++)
                {
                    FilterID[i] = filters[i].GetThisFilterID();
                    filters[i].UI2Data();
                    sb.Clear();
                    filters[i].Save(sb);
                    FilterData[i] = sb.ToString();
                }

                return true;        /// All OK
            }
            catch (Exception exc)
            {
                MessageBox.Show(exc.Message, Strings.Error_serializing_filters, MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
                return false;
            }
        }

        /// <summary>
        /// Save public fields of this class to the XML file.
        /// </summary>
        public bool Save(string fileName)
        {
            try
            {
				using (TextWriter writer = new StreamWriter(fileName))
                {
                    (new XmlSerializer(typeof(FiltersConfig))).Serialize(writer, this);
                }
                return true;
            }
            catch (Exception exc)
            {
                MessageBox.Show(exc.Message, Strings.Error_saving_file, MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
                return false;
            }
        }
	}
}