using System;
using System.Collections.Generic;
using System.Windows.Forms;
using log4net;
using Common;
using Results.Resources;
using NHibernate;
using SharedDatabase.Entities;

namespace Results.Forms
{
    public partial class BatchResultsDlg : Form
    {
        static readonly ILog log = LogManager.GetLogger(typeof(BatchResultsDlg));

        ///
        /// Public members
        ///
        public Results.BatchResults Results;
        public IList<Results.WMeterRsltItemSpec> Items;
        public MetersArrangement MetersArrangement;
        public TestsArrangement TestsArrangement;
        public int NrMetersInOneGroup;
        public bool ShowDisabledPositions;
        public int MinWidth;
        public int MinHeight;
        public int PopupResultsLeft;
        public int PopupResultsTop;
        public int PopupResultsWidth;
        public int PopupResultsHeight;
        public int[] RsltsClmnWidths;
        public IList<string> SerialNrs;


        ///
        /// Private members
        ///
        IOneWMResultsCtrl[] wmRsltsCtrl;        /// An array of controls with water meter results.
        IOneWMResultsCtrl firstEnabledControl;
        DateTime lastRedraw;
        DateTime lastSizeChange;
        int metersInOneGroup;
        int nrGroups;

        Timer timer;


        public BatchResultsDlg()
        {
            InitializeComponent();

            firstEnabledControl = null;
            lastSizeChange = DateTime.Now;
            nrGroups = 1;
            metersInOneGroup = 1;

            /// Create a timer with one second interval.
            timer = new Timer();
            timer.Interval = 1000;   /// ms
            timer.Tick += new EventHandler(OnTimer);
            timer.Start();
        }

        private void BatchResultsDlg_Load(object sender, EventArgs e)
        {
            if (PopupResultsLeft != 0) Left = PopupResultsLeft;
            if (PopupResultsTop != 0) Top = PopupResultsTop;
            if (PopupResultsWidth != 0)  Width = PopupResultsWidth;
            if (PopupResultsHeight != 0) Height = PopupResultsHeight;

            CreateControlsAndFillPanel(Results);
            UpdateColumnWidths(RsltsClmnWidths);
            UpdateResults(Results);
        }


        ///
        /// Handle double-click inside a water meter results control
        ///
        void OnDoubleClick(object sender, Results.Forms.WaterMeterEventArgs args)
        {
            if (args.WMPosition > 0)
            {
                foreach (var wm in Results.Batch.WaterMeters)
                {
                    if (!wm.Disabled && (wm.WMPosition == args.WMPosition))
                    {
                        ShowMoreWMResults(wm);
                        return;
                    }
                }
            }

            MessageBox.Show(Strings.No_water_meter);
            return;
        }


        void UpdateColumnWidths(int[] columnWidths)
        {
            foreach (var ctrl in wmRsltsCtrl) ctrl.Update(columnWidths);
        }

        void UpdateScrollpositions(int scrollStart)
        {
            /// TODO
        }


        /// <summary>
        /// Re-draw the results. Apply new settings if they changed.
        /// </summary>
        void CreateControlsAndFillPanel(Results.BatchResults results)
        {
            if ((results == null) || (results.WMPositionsCount == 0))
            {
                /// There are no water meters at all
                flowLayoutPanel.Controls.Clear();
                wmRsltsCtrl = new OneWMResultsRowsCtrl[0];
                firstEnabledControl = null;
                return;
            }

            ///
            /// Determine water meter positions count
            ///
            int displayedControlsCount = 0;
            for (int i = 0; i < results.Batch.WaterMeters.Count; i++)
            {
                if ((ShowDisabledPositions || !results.Batch.WaterMeters[i].Disabled) &&
                    (SerialNrs == null || SerialNrs.Contains(results.Batch.WaterMeters[i].SerialNr)))
                {
                    displayedControlsCount++;
                }
            }

            ///
            /// Calculate geometry
            ///
            metersInOneGroup = Math.Max(1, Math.Min(displayedControlsCount, NrMetersInOneGroup));
            nrGroups = Math.Max(1, (displayedControlsCount + metersInOneGroup - 1) / metersInOneGroup);

            int oneWidth;
            int oneHeight;
            ///
            if (MetersArrangement == MetersArrangement.Horizontally)
            {
                flowLayoutPanel.FlowDirection = FlowDirection.LeftToRight;
                oneWidth = Math.Max(MinWidth, flowLayoutPanel.Width / metersInOneGroup - 6);
                oneHeight = Math.Max(MinHeight, flowLayoutPanel.Height / nrGroups - 6);
            }
            else
            {
                flowLayoutPanel.FlowDirection = FlowDirection.TopDown;
                oneWidth = Math.Max(MinWidth, flowLayoutPanel.Width / nrGroups - 6);
                oneHeight = Math.Max(MinHeight, flowLayoutPanel.Height / metersInOneGroup - 6);
            }

            ///
            /// Create controls and fill the FlowLayoutPanel
            ///
            flowLayoutPanel.SuspendLayout();
            flowLayoutPanel.Controls.Clear();
            flowLayoutPanel.WrapContents = true;
            flowLayoutPanel.AutoScroll = true;

            wmRsltsCtrl = new IOneWMResultsCtrl[displayedControlsCount];
            int ix = 0;
            firstEnabledControl = null;
            for (int i = 0; i < results.Batch.WaterMeters.Count; i++)
            {
                if ((ShowDisabledPositions || !results.Batch.WaterMeters[i].Disabled) &&
                    (SerialNrs == null || SerialNrs.Contains(results.Batch.WaterMeters[i].SerialNr)))
                {
                    /// Create one water meter position / control
                    wmRsltsCtrl[ix] = (TestsArrangement == TestsArrangement.Rows)
                                    ? new OneWMResultsRowsCtrl() as IOneWMResultsCtrl
                                    : new OneWMResultsColumnsCtrl() as IOneWMResultsCtrl;
                    wmRsltsCtrl[ix].Width = oneWidth;
                    wmRsltsCtrl[ix].Height = oneHeight;

                    if (!results.Batch.WaterMeters[i].Disabled)
                    {
                        if ((firstEnabledControl == null) && !results.Batch.WaterMeters[i].Disabled)
                        {
                            firstEnabledControl = wmRsltsCtrl[ix];
                        }

                        //wmRsltsCtrl[ix].Update(results.WaterMeters[i].WMPosition);
                        wmRsltsCtrl[ix].Update(Items);
                        wmRsltsCtrl[ix].WMResultsClickedHandler += delegate(object s, Results.Forms.WaterMeterEventArgs args)
                        {
                            if (InvokeRequired)
                            {
                                Invoke(new EventHandler<Results.Forms.WaterMeterEventArgs>(OnDoubleClick), s, args);
                            }
                            else
                            {
                                OnDoubleClick(s, args);
                            }
                        };
                    }

                    flowLayoutPanel.Controls.Add(wmRsltsCtrl[ix] as UserControl);
                    ix++;
                }
            }

            flowLayoutPanel.ResumeLayout();

            lastRedraw = DateTime.Now;
        }


        void UpdateResults(Results.BatchResults results)
        {
            if (results != null && results.Batch != null && results.Batch.WaterMeters != null)
            {
                int ctrlIx = 0;
                for (int wmNr0 = 0; wmNr0 < results.Batch.WaterMeters.Count; wmNr0++)
                {
                    if ((ShowDisabledPositions || !results.Batch.WaterMeters[wmNr0].Disabled) &&
                        (SerialNrs == null || SerialNrs.Contains(results.Batch.WaterMeters[wmNr0].SerialNr)))
                    {
                        if (ctrlIx < wmRsltsCtrl.Length) wmRsltsCtrl[ctrlIx++].Update(results.Batch.WaterMeters[wmNr0]);
                    }
                }
            }
        }


        void ShowMoreWMResults(Results.Entities.WaterMeter wm)
        {
            if ((SharedDatabase.TracingDB.SessionFactory == null) || string.IsNullOrEmpty(wm.SerialNr))
            {
                new Results.Forms.MoreWMResultsDlg(wm, null).ShowDialog();
            }
            else
            {
                using (ISession session = SharedDatabase.TracingDB.SessionFactory.OpenSession())
                {
                    IList<ReferenceRecord> refRecords = session.QueryOver<ReferenceRecord>()
                                                               .Where(x => (x.Code1 == wm.SerialNr))
                                                               .OrderBy(x => x.Timestamp).Desc
                                                               .List();

                    new Results.Forms.MoreWMResultsDlg(wm, refRecords).ShowDialog();
                }
            }
        }


        private void BatchResultsDlg_FormClosing(object sender, FormClosingEventArgs e)
        {
            PopupResultsLeft = Left;
            PopupResultsTop = Top;
            PopupResultsWidth = Width;
            PopupResultsHeight = Height;
        }


        private void flowLayoutPanel_SizeChanged(object sender, EventArgs e)
        {
            lastSizeChange = DateTime.Now;
        }

        private void OnTimer(object source, EventArgs e)
        {
            if (DateTime.Compare(lastSizeChange, lastRedraw) > 0 && !flowLayoutPanel.IsDisposed)
            {
                /// The last size change was more recent then the last redraw

                DateTime now = DateTime.Now;
                if (DateTime.Compare(lastSizeChange + new TimeSpan(0, 0, 1), now) < 0)
                {
                    /// More then 1 second since the last panel size change

                    /// Calculate geometry
                    int oneWidth;
                    int oneHeight;
                    ///
                    if (MetersArrangement == MetersArrangement.Horizontally)
                    {
                        flowLayoutPanel.FlowDirection = FlowDirection.LeftToRight;
                        oneWidth = Math.Max(MinWidth, flowLayoutPanel.Width / metersInOneGroup - 6);
                        oneHeight = Math.Max(MinHeight, flowLayoutPanel.Height / nrGroups - 6);
                    }
                    else
                    {
                        flowLayoutPanel.FlowDirection = FlowDirection.TopDown;
                        oneWidth = Math.Max(MinWidth, flowLayoutPanel.Width / nrGroups - 6);
                        oneHeight = Math.Max(MinHeight, flowLayoutPanel.Height / metersInOneGroup - 6);
                    }

                    if (wmRsltsCtrl != null)
                    {
                        /// Update size of controls
                        flowLayoutPanel.SuspendLayout();
                        ///
                        foreach (var oneCtrl in wmRsltsCtrl)
                        {
                            oneCtrl.Width = oneWidth;
                            oneCtrl.Height = oneHeight;
                        }
                        ///
                        flowLayoutPanel.ResumeLayout();
                    }
                }
            }
        }
    }
}