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
    {
        /// <summary>
        /// Available languages.
        /// Method ToString should give a supported culture info string:
        /// ("en","de","fr","es","it","cn", etc.).
        /// </summary>
        public enum Languages
        {
            en,
            de,
            sk,
            Count,
        }

        /// <summary>
        /// User interface language ("en","de","fr","es","it","cn", etc.).
        /// </summary>
        public string Language = "en";

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

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

        /// <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 int RightPaneHorizSplitterDistance;

        /// 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;

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

        [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; } }

        /// 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;

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

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

		/// Configuration of results
        public Forms.ResultsConfig.Meters ResultsConfigMeters;
		public Forms.ResultsConfig.TestsAre ResultsConfigTests;
		public string[] RsltItems_Screen_SingleWM;
		public string[] RsltItems_Screen_CombinedWM;
		public string[] RsltItems_Printer_SingleWM;
		public string[] RsltItems_Printer_CombinedWM;
		public string[] RsltItems_Disk_SingleWM;
		public string[] RsltItems_Disk_CombinedWM;

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

		[XmlArrayAttribute("RsltsCombinedClmnWdths")]
		public int[] RsltsCombinedClmnWdths;
		[XmlIgnore]
		public int RsltsCombinedClmnCount { get { return (RsltsCombinedClmnWdths != null) ? RsltsCombinedClmnWdths.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 = (new XmlSerializer(typeof(LocalSettings))).Deserialize(reader) as LocalSettings;
                    // Copy the settings just in case De-serialize() completes OK
					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))
                {
                    (new XmlSerializer(typeof(LocalSettings))).Serialize(writer, this);
                }
            }
            catch (Exception e)
            {
                string msg = e.Message;
            }
        }

		/// <summary>
		/// Updates purchase order history
		/// </summary>
		/// <param name="lastPurchaseOrder"></param>
		public void UpdatePurchaseOrderHistory(string lastPurchaseOrder)
		{
			if (string.IsNullOrEmpty(lastPurchaseOrder)) return;

			int match = -1;
			for (int i = 0; i < PurchaseOrderHistoryCount; i++)
			{
				if (PurchaseOrderHistory[i] == lastPurchaseOrder)
				{
					match = i;
					break;
				}
			}

			if (match >= 0 || PurchaseOrderHistoryCount >= 10)
			{
				/// History does not have to be or should not be extended
				if (match < 0) match = PurchaseOrderHistoryCount - 1;

				for (int j = match; j > 0; j--)
				{
					PurchaseOrderHistory[j] = PurchaseOrderHistory[j - 1];
				}
				Program.LocalSettings.PurchaseOrderHistory[0] = lastPurchaseOrder;
			}
			else
			{
				/// History wiil be extended, new item inserted at the beginning
				string[] newHistory = new string[Program.LocalSettings.PurchaseOrderHistoryCount + 1];
				newHistory[0] = lastPurchaseOrder;
				for (int j = 1; j <= PurchaseOrderHistoryCount; j++)
				{
					newHistory[j] = PurchaseOrderHistory[j - 1];
				}
				PurchaseOrderHistory = newHistory;
			}
			Save();
		}

    }
}