package timeflow.views;

import timeflow.app.ui.HtmlDisplay;
import timeflow.data.analysis.*;
import timeflow.data.db.*;
import timeflow.data.time.*;
import timeflow.format.field.FieldFormatCatalog;
import timeflow.model.*;


import java.awt.*;
import java.util.Date;

import javax.swing.*;

public class SummaryView extends AbstractView
{

        private JEditorPane analysisDisplay;
        private FieldAnalysis[] fieldAnalyzers = new FieldAnalysis[]
        {
                new MissingValueAnalysis(), new RangeDateAnalysis(),
                new RangeNumberAnalysis(), new FrequencyAnalysis()
        };
        private int numItems;
        private int numFiltered;
        private Interval range;
        private JComponent controls;

        public SummaryView(TFModel model)
        {
                super(model);
                analysisDisplay = HtmlDisplay.create();
                JScrollPane scrollPane = new JScrollPane(analysisDisplay);
                setLayout(new GridLayout(1, 1));
                add(scrollPane);

                controls = new HtmlControls("This report gives a <br> statistical breakdown<br> "
                        + "of your data. <p> Reading the summary often helps<br> you find "
                        + "data errors.");
        }

        @Override
        public JComponent _getControls()
        {
                return controls;
        }

        void makeHtml()
        {
                Display d = getModel().getDisplay();
                ActDB db = getModel().getDB();
                ActList acts = getModel().getActs();
                StringBuffer page = new StringBuffer();
                page.append("<blockquote>");
                if (getModel().getDB() == null)
                {
                        page.append("<h1><font color=#003399>No data loaded.</font></h1>");
                } else
                {
                        page.append("<BR><BR><BR>File: " + getModel().getDbFile() + "<br>");
                        page.append("Source: " + getModel().getDB().getSource() + "<br><br>");
                        page.append("Description: " + getModel().getDB().getDescription() + "<br><br>");
                        page.append("<br><br>");
                        page.append("<table border=0>");


                        page.append("<tr><td valign=top align=left width=100><b>");
                        page.append("<font size=+1>Data</font><br>");

                        page.append("</td><td align=top>");
                        append(page, "Total events", "" + numItems);

                        if (numItems > 0)
                        {
                                append(page, "Total selected", "" + numFiltered);
                                if (numFiltered > 0)
                                {
                                        append(page, "Earliest", new Date(range.start).toString());
                                        append(page, "Latest", new Date(range.end).toString());
                                }
                        }
                        page.append("<br></td></tr>");

                        page.append("<tr><td valign=top align=left width=100><b>");
                        page.append("<font size=+1>Fields</font><br>");

                        page.append("</td><td align=top>");
                        for (Field f : getModel().getDB().getFields())
                        {
                                append(page, f.getName(), FieldFormatCatalog.humanName(f.getType()) + fieldLabel(f));
                        }
                        page.append("<br></td></tr>");


                        page.append("</table>");

                        if (numFiltered > 0)
                        {
                                page.append("<h1>Statistics (for " + acts.size() + " items)</h1>");
                                for (Field field : db.getFields())
                                {
                                        page.append("<h2>" + field.getName() + "</h2>");
                                        page.append("<ul>");
                                        for (int i = 0; i < fieldAnalyzers.length; i++)
                                        {
                                                FieldAnalysis fa = fieldAnalyzers[i];
                                                if (fa.canHandleType(field.getType()))
                                                {
                                                        page.append("<li>");
                                                        page.append("<b><font color=#808080>" + fa.getName() + "</font></b><br>");
                                                        fa.perform(acts, field);
                                                        String[] s = fa.getResultDescription();
                                                        for (int j = 0; j < s.length; j++)
                                                        {
                                                                page.append(s[j]);
                                                                page.append("<br>");
                                                        }
                                                        page.append("</li>");
                                                }
                                        }
                                        page.append("</ul>");
                                }
                        }
                }
                page.append("</blockquote>");
                analysisDisplay.setText(page.toString());
                analysisDisplay.setCaretPosition(0);
        }

        static void append(StringBuffer page, String label, String value)
        {
                page.append("<b><font color=#808080>" + label + "</font></b>&nbsp;&nbsp;&nbsp;&nbsp;");
                page.append(value);
                page.append("<br>");
        }

        @Override
        protected void onscreen(boolean majorChange)
        {
                _note(null);
        }

        protected void _note(TFEvent e)
        {
                recalculate();
                makeHtml();
                repaint();
        }

        String fieldLabel(Field f)
        {
                StringBuffer b = new StringBuffer("<b>");
                ActDB db = getModel().getDB();
                for (String v : VirtualField.list())
                {
                        if (db.getField(v) != null && db.getField(v).getName().equals(f.getName()))
                        {
                                b.append(" (Shown in visualization as " + VirtualField.humanName(v) + ")");
                        }
                }
                b.append("</b>");
                return b.toString();
        }

        void recalculate()
        {
                ActList acts = getModel().getActs();
                if (acts == null)
                {
                        numItems = 0;
                        return;
                }
                numFiltered = acts.size();
                numItems = getModel().getDB().size();
                range = DBUtils.range(acts, VirtualField.START);
        }

        @Override
        public String getName()
        {
                return "Summary";
        }
}