///
/// Copyright (c) 2013-2015 Sensus Metering Systems
///
using System;
using System.IO;
using System.Text;
using System.Xml.Serialization;

namespace TBF
{
    /// <summary>
    /// Class to be serialized to an XML file...
    /// Public members are local settings.
    /// These settings are modified by dialogs invoked by menu items
    ///   Edit->Preferences ... PreferencesDlg ... S1.1(language, etc. local settings), and
    ///   Edit->Advanced settings ... AdvancedSettingsDlg ... S1.2(spec. where bench settings are stored)
    /// </summary>
    [XmlRootAttribute("TestBenchFramework")]
    public class LocalSettings
    {
		static XmlSerializer serializer = XmlSerializer.FromTypes(new[] { typeof(LocalSettings) })[0];
		
		/// <summary>
        /// User interface language (used as CultureInfo(..) constructor argument).
        /// </summary>
        public string Language = "en";

        /// <summary>
        /// Names and database settings of test benches.
        /// </summary>
        [XmlArrayAttribute("TestBenches")]
        public Config.DatabaseSettings[] TestBenches;

        [XmlIgnore]
        public int BenchesCount { get { return (TestBenches != null) ? TestBenches.GetLength(0) : 0; } }

		/// <summary>
		/// Login method: UserName, FullName or Number
		/// </summary>
		public Users.Entities.LoginMethod LoginMethod;

        /// <summary>
        /// Currently selected bench name (local or remote) or null (= no selection done).
        /// </summary>
        [XmlElementAttribute("LastBench")]
        public string LastBenchName;

        /// <summary>
        /// Currently selected procedure name or null (= no selection done yet).
        /// </summary>
        [XmlElementAttribute("LastProcedure")]
        public string LastProcedureName;
		public int BatchNr;

		public double RealDensity;       /// water density [kg/m3]
		public double AtTemperature;     /// measured at temperature [degree C]

		public int RightPaneHorizSplitterDistance;
		public int TopPaneVerticalSplitterDistance;

        /// MainWnd
        public int MainWndLeft;
        public int MainWndTop;
        public int MainWndWidth;
        public int MainWndHeight;
        public bool ManiWndMaximized;

        /// Components
        public int ComponentsDlgLeft;
        public int ComponentsDlgTop;
        public int ComponentsDlgWidth;
        public int ComponentsDlgHeight;

        ///  Pop-up results
        public int PopupResultsLeft;
        public int PopupResultsTop;
        public int PopupResultsWidth;
        public int PopupResultsHeight;
        

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

        /// Paths
        public int PathsDlgLeft;
        public int PathsDlgTop;
        public int PathsDlgWidth;
        public int PathsDlgHeight;

        /// iPerlCommunicationsForm
        public int iPerlCommunicationsFormLeft;
        public int iPerlCommunicationsFormTop;

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

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

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

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

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

        /// Transitions
        public int TransitionsDlgLeft;
        public int TransitionsDlgTop;
        public int TransitionsDlgWidth;
        public int TransitionsDlgHeight;

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

        /// Metrology
        public int MetrologyDlgLeft;
        public int MetrologyDlgTop;
        public int MetrologyDlgWidth;
        public int MetrologyDlgHeight;


        /// Procedures
        public int ProceduresDlgLeft;
        public int ProceduresDlgTop;
        public int ProceduresDlgWidth;
        public int ProceduresDlgHeight;

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

        /// OneProcedure
        public int OneProcedureDlgLeft;
        public int OneProcedureDlgTop;
        public int OneProcedureDlgWidth;
        public int OneProcedureDlgHeight;

		public int PrintOrderLeft;
		public int PrintOrderTop;

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

		/// Endurance test cycle steps
		public int EnduranceDlgLeft;
		public int EnduranceDlgTop;
		public int EnduranceDlgWidth;
		public int EnduranceDlgHeight;

		/// Serial numbers
		public string[] LastSNTexts;
		[XmlIgnore]
		public int LastSNTextsCount { get { return (LastSNTexts != null) ? LastSNTexts.Length : 0; } }

		public string[] LastMainSNTexts;
		[XmlIgnore]
		public int LastMainSNTextsCount { get { return (LastMainSNTexts != null) ? LastMainSNTexts.Length : 0; } }

		public string[] LastAuxSNTexts;
		[XmlIgnore]
		public int LastAuxSNTextsCount { get { return (LastAuxSNTexts != null) ? LastAuxSNTexts.Length : 0; } }

        public string LastText1;
        public string LastText2;
        public string LastText3;
        public string LastRemark;

		/// Purchase order history
		public string[] PurchaseOrderHistory;
		[XmlIgnore]
		public int PurchaseOrderHistoryCount { get { return (PurchaseOrderHistory != null) ? PurchaseOrderHistory.Length : 0; } }

		/// Tester history
		public string[] TesterHistory;
		[XmlIgnore]
		public int TesterHistoryCount { get { return (TesterHistory != null) ? TesterHistory.Length : 0; } }

		public bool PrintOrderOnlyGoodResult;
		public bool PrintOrderOnlyLastResult;

		/// Configuration of results
		public Config.Entities.MetersArrangement ResultsConfigMeters;
		public Config.Entities.TestsArrangement ResultsConfigTests;
		public int ResultsConfigMetersInOneGroup;
		public string[] RsltItems_Screen_SingleWM;
		public string[] RsltItems_Screen_CombinedWM;
		public string[] RsltItems_Screen_HeatM;

		public string[] RsltItems_Printer_SingleWM;		/// obsolete
		public string[] RsltItems_Printer_CombinedWM;	/// obsolete
		public string[] RsltItems_Printer_HeatM;		/// obsolete

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

        [XmlIgnore]
        public readonly bool AlwaysAskPasswdWhenUnlocking;

        [XmlIgnore]
        public readonly bool RestoreUserWhenLeavingDialog;
            

        public LocalSettings()
        {
            AlwaysAskPasswdWhenUnlocking = false;
            RestoreUserWhenLeavingDialog = true;
        }

        /// <summary>
        /// Load public fields of this class from the XML file.
        /// </summary>
		/// <returns>LocalSettings object or null when Load() fails</returns>
		public static LocalSettings Load(string fileName)
        {
            try
            {
				using (TextReader reader = new StreamReader(fileName))
                {
					LocalSettings ls = serializer.Deserialize(reader) as LocalSettings;

					if (ls.RealDensity < 500 || ls.RealDensity > 1500)
					{
						/// Use default value if density was not set yet
						ls.RealDensity = 998.2008;	/// kg/m3
						ls.AtTemperature = 20.0;	/// deg.C
					}

					return ls;
                }
            }
            catch (Exception e)
            {
                string msg = e.Message;
				return null;
            }
        }

        /// <summary>
        /// Save public fields of this class to the XML file.
        /// </summary>
        public void Save()
        {
            try
            {
				using (TextWriter writer = new StreamWriter(Program.LocalSettingsFileName))
                {
					serializer.Serialize(writer, this);
                }
            }
            catch (Exception e)
            {
                string msg = e.Message;
            }
        }

		/// <summary>
		/// Updates history stored in a string array by a new latest string.
		/// </summary>
		/// <param name="lastStrValue">Lste entered string</param>
		/// <returns>true = updated and saved</returns>
		public bool UpdateHistory(string lastStrValue, ref string[] history, int maxHistoryLen = 10)
		{
			if (string.IsNullOrEmpty(lastStrValue)) return false;

			int currentHistoryCount = (history != null) ? history.Length : 0;

			int match = -1;
			for (int i = 0; i < currentHistoryCount; i++)
			{
				if (history[i] == lastStrValue)
				{
					match = i;
					break;
				}
			}

			if (match >= 0 || currentHistoryCount >= maxHistoryLen)
			{
				/// History does not have to be (because of a match) or should not be extended (because of the lenght)
				if (match < 0) match = currentHistoryCount - 1;

				for (int j = match; j > 0; j--)
				{
					history[j] = history[j - 1];
				}
				history[0] = lastStrValue;
			}
			else
			{
				/// History wiil be extended, new item inserted at the beginning
				string[] newHistory = new string[currentHistoryCount + 1];
				newHistory[0] = lastStrValue;
				for (int j = 1; j <= currentHistoryCount; j++)
				{
					newHistory[j] = history[j - 1];
				}
				history = newHistory;
			}
			Save();
			return true;
		}

    }
}