using System;
using System.Collections.Generic;
using System.Text;
using FastReport.Data;
using FastReport.Table;
using FastReport.Utils;
using System.Drawing;
using System.Collections;

namespace FastReport.Matrix
{
    internal class MatrixHelper
    {
        private MatrixObject matrix;
        private int headerWidth;
        private int headerHeight;
        private int bodyWidth;
        private int bodyHeight;
        private bool designTime;
        private TableResult resultTable;
        private MatrixDescriptor titleDescriptor;
        private MatrixDescriptor cellHeaderDescriptor;
        private MatrixHeaderDescriptor noColumnsDescriptor;
        private MatrixHeaderDescriptor noRowsDescriptor;
        private MatrixCellDescriptor noCellsDescriptor;
        private object[] cellValues;
        private int[] evenStyleIndices;
        private bool noColumns;
        private bool noRows;

        #region Properties
        public MatrixObject Matrix
        {
            get { return matrix; }
        }

        public Report Report
        {
            get { return Matrix.Report; }
        }

        public TableResult ResultTable
        {
            get { return designTime ? resultTable : Matrix.ResultTable; }
        }

        public int HeaderHeight
        {
            get { return headerHeight; }
        }

        public int HeaderWidth
        {
            get { return headerWidth; }
        }

        public int BodyWidth
        {
            get { return bodyWidth; }
        }

        public int BodyHeight
        {
            get { return bodyHeight; }
        }

        public object[] CellValues
        {
            get { return cellValues; }
        }
        #endregion

        #region Private Methods
        private string ExtractColumnName(string complexName)
        {
            if (complexName.StartsWith("[") && complexName.EndsWith("]"))
                complexName = complexName.Substring(1, complexName.Length - 2);

            if (Report == null)
                return complexName;
            Column column = DataHelper.GetColumn(Report.Dictionary, complexName);
            if (column == null)
                return complexName;
            return column.Alias;
        }

        /// <summary>
        /// Updates HeaderWidth, HeaderHeight, BodyWidth, BodyHeight properties.
        /// </summary>
        private void UpdateTemplateSizes()
        {
            headerWidth = Matrix.Data.Rows.Count;
            if (headerWidth == 0)
                headerWidth = 1;
            if (Matrix.Data.Cells.Count > 1 && !Matrix.CellsSideBySide)
                headerWidth++;

            headerHeight = Matrix.Data.Columns.Count;
            if (headerHeight == 0)
                headerHeight = 1;
            if (Matrix.Data.Cells.Count > 1 && Matrix.CellsSideBySide)
                headerHeight++;
            if (Matrix.ShowTitle)
                headerHeight++;

            bodyWidth = 1;
            foreach (MatrixHeaderDescriptor descr in Matrix.Data.Columns)
            {
                if (descr.Totals)
                    bodyWidth++;
            }
            if (Matrix.CellsSideBySide && Matrix.Data.Cells.Count > 1)
                bodyWidth *= Matrix.Data.Cells.Count;

            bodyHeight = 1;
            foreach (MatrixHeaderDescriptor descr in Matrix.Data.Rows)
            {
                if (descr.Totals)
                    bodyHeight++;
            }
            if (!Matrix.CellsSideBySide && Matrix.Data.Cells.Count > 1)
                bodyHeight *= Matrix.Data.Cells.Count;
        }

        private void UpdateColumnDescriptors()
        {
            int left = HeaderWidth;
            int top = 0;
            int width = BodyWidth;
            int dataWidth = 1;

            if (Matrix.Data.Cells.Count > 1 && Matrix.CellsSideBySide)
                dataWidth = Matrix.Data.Cells.Count;

            if (Matrix.ShowTitle)
                top++;

            foreach (MatrixHeaderDescriptor descr in Matrix.Data.Columns)
            {
                if (descr.Totals)
                {
                    descr.TemplateTotalColumn = Matrix.Columns[left + width - dataWidth];
                    descr.TemplateTotalRow = Matrix.Rows[top];
                    descr.TemplateTotalCell = Matrix[left + width - dataWidth, top];
                    width -= dataWidth;
                }
                else
                {
                    descr.TemplateTotalColumn = null;
                    descr.TemplateTotalRow = null;
                    descr.TemplateTotalCell = null;
                }

                descr.TemplateColumn = Matrix.Columns[left];
                descr.TemplateRow = Matrix.Rows[top];
                descr.TemplateCell = Matrix[left, top];
                top++;
            }
        }

        private void UpdateRowDescriptors()
        {
            int left = 0;
            int top = HeaderHeight;
            int height = BodyHeight;
            int dataHeight = 1;

            if (Matrix.Data.Cells.Count > 1 && !Matrix.CellsSideBySide)
                dataHeight = Matrix.Data.Cells.Count;

            foreach (MatrixHeaderDescriptor descr in Matrix.Data.Rows)
            {
                if (descr.Totals)
                {
                    descr.TemplateTotalColumn = Matrix.Columns[left];
                    descr.TemplateTotalRow = Matrix.Rows[top + height - dataHeight];
                    descr.TemplateTotalCell = Matrix[left, top + height - dataHeight];
                    height -= dataHeight;
                }
                else
                {
                    descr.TemplateTotalColumn = null;
                    descr.TemplateTotalRow = null;
                    descr.TemplateTotalCell = null;
                }

                descr.TemplateColumn = Matrix.Columns[left];
                descr.TemplateRow = Matrix.Rows[top];
                descr.TemplateCell = Matrix[left, top];
                left++;
            }
        }

        private void UpdateCellDescriptors()
        {
            int x = HeaderWidth;
            int y = HeaderHeight;

            foreach (MatrixCellDescriptor descr in Matrix.Data.Cells)
            {
                descr.TemplateColumn = Matrix.Columns[x];
                descr.TemplateRow = Matrix.Rows[y];
                descr.TemplateCell = Matrix[x, y];

                if (Matrix.CellsSideBySide)
                    x++;
                else
                    y++;
            }
        }

        private void UpdateOtherDescriptors()
        {
            titleDescriptor.TemplateColumn = null;
            titleDescriptor.TemplateRow = null;
            titleDescriptor.TemplateCell = null;
            if (Matrix.ShowTitle)
            {
                titleDescriptor.TemplateColumn = Matrix.Columns[HeaderWidth];
                titleDescriptor.TemplateRow = Matrix.Rows[0];
                titleDescriptor.TemplateCell = Matrix[HeaderWidth, 0];
            }

            cellHeaderDescriptor.TemplateColumn = null;
            cellHeaderDescriptor.TemplateRow = null;
            cellHeaderDescriptor.TemplateCell = null;
            if (Matrix.Data.Cells.Count > 1)
            {
                if (Matrix.CellsSideBySide)
                {
                    cellHeaderDescriptor.TemplateColumn = Matrix.Columns[HeaderWidth];
                    cellHeaderDescriptor.TemplateRow = Matrix.Rows[HeaderHeight - 1];
                }
                else
                {
                    cellHeaderDescriptor.TemplateColumn = Matrix.Columns[HeaderWidth - 1];
                    cellHeaderDescriptor.TemplateRow = Matrix.Rows[HeaderHeight];
                }
            }
        }

        private void ApplyStyle(TableCell cell, string styleName)
        {
            Style style = null;
            int styleIndex = Matrix.StyleSheet.IndexOf(Matrix.Style);
            if (styleIndex != -1)
            {
                StyleCollection styles = Matrix.StyleSheet[styleIndex];
                style = styles[styles.IndexOf(styleName)];
            }

            if (style != null)
                cell.ApplyStyle(style);
        }

        private TableCell CreateCell(string text)
        {
            TableCell cell = new TableCell();
            cell.Font = DrawUtils.DefaultReportFont;
            cell.Text = text;
            cell.HorzAlign = HorzAlign.Center;
            cell.VertAlign = VertAlign.Center;
            ApplyStyle(cell, "Header");
            return cell;
        }

        private TableCell CreateDataCell()
        {
            TableCell cell = new TableCell();
            cell.Font = DrawUtils.DefaultReportFont;
            cell.HorzAlign = HorzAlign.Right;
            cell.VertAlign = VertAlign.Center;
            ApplyStyle(cell, "Body");
            return cell;
        }

        private void SetHint(TableCell cell, string text)
        {
            cell.Assign(Matrix.Styles.DefaultStyle);
            cell.Text = text;
            cell.Font = DrawUtils.DefaultReportFont;
            cell.TextFill = new SolidFill(Color.Gray);
            cell.HorzAlign = HorzAlign.Center;
            cell.VertAlign = VertAlign.Center;
            cell.SetFlags(Flags.CanEdit, false);
        }

        private Point GetBodyLocation()
        {
            // determine the template's body location. Do not rely on HeaderWidth, HeaderHeight - 
            // the template may be empty
            Point result = new Point();

            foreach (MatrixHeaderDescriptor descr in Matrix.Data.Columns)
            {
                if (descr.TemplateColumn != null)
                    result.X = descr.TemplateColumn.Index;
            }
            foreach (MatrixHeaderDescriptor descr in Matrix.Data.Rows)
            {
                if (descr.TemplateRow != null)
                    result.Y = descr.TemplateRow.Index;
            }

            return result;
        }

        private void InitResultTable(bool isTemplate)
        {
            Matrix.Data.Columns.AddTotalItems(isTemplate);
            Matrix.Data.Rows.AddTotalItems(isTemplate);
            List<MatrixHeaderItem> columnTerminalItems = Matrix.Data.Columns.RootItem.GetTerminalItems();
            List<MatrixHeaderItem> rowTerminalItems = Matrix.Data.Rows.RootItem.GetTerminalItems();

            // create corner
            List<MatrixDescriptor> descrList = new List<MatrixDescriptor>();

            if (Matrix.ShowTitle)
                descrList.Add(titleDescriptor);
            descrList.AddRange(Matrix.Data.Columns.ToArray());
            if (Matrix.Data.Cells.Count > 1 && Matrix.CellsSideBySide)
                descrList.Add(cellHeaderDescriptor);

            foreach (MatrixDescriptor descr in descrList)
            {
                TableRow row = new TableRow();
                if (descr.TemplateRow != null)
                    row.Assign(descr.TemplateRow);
                ResultTable.Rows.Add(row);
            }

            descrList.Clear();
            descrList.AddRange(Matrix.Data.Rows.ToArray());
            if (Matrix.Data.Cells.Count > 1 && !Matrix.CellsSideBySide)
                descrList.Add(cellHeaderDescriptor);

            foreach (MatrixDescriptor descr in descrList)
            {
                TableColumn column = new TableColumn();
                if (descr.TemplateColumn != null)
                    column.Assign(descr.TemplateColumn);
                ResultTable.Columns.Add(column);
            }

            // determine the body location
            Point bodyLocation = GetBodyLocation();

            // create columns
            foreach (MatrixHeaderItem item in columnTerminalItems)
            {
                foreach (MatrixCellDescriptor descr in Matrix.Data.Cells)
                {
                    TableColumn column = new TableColumn();
                    if (item.TemplateColumn != null && descr.TemplateColumn != null)
                        column.Assign(Matrix.Columns[item.TemplateColumn.Index + (descr.TemplateColumn.Index - bodyLocation.X)]);
                    ResultTable.Columns.Add(column);

                    if (!Matrix.CellsSideBySide)
                        break;
                }
            }

            // create rows
            foreach (MatrixHeaderItem item in rowTerminalItems)
            {
                foreach (MatrixCellDescriptor descr in Matrix.Data.Cells)
                {
                    TableRow row = new TableRow();
                    if (item.TemplateRow != null && descr.TemplateRow != null)
                        row.Assign(Matrix.Rows[item.TemplateRow.Index + (descr.TemplateRow.Index - bodyLocation.Y)]);
                    ResultTable.Rows.Add(row);

                    if (Matrix.CellsSideBySide)
                        break;
                }
            }
        }

        private void PrintHeaderCell(MatrixHeaderItem item, TableCellData resultCell, bool isEven)
        {
            TableCell templateCell = item.TemplateCell;
            if (templateCell != null)
            {
                if (designTime)
                {
                    if (!item.IsTotal)
                        templateCell.Text = item.Value.ToString();
                    resultCell.RunTimeAssign(templateCell, true);
                }
                else
                {
                    if (Matrix.DataSource != null)
                        Matrix.DataSource.CurrentRowNo = item.DataRowNo;

                    templateCell.SetValue(item.Value);
                    if (!item.IsTotal)
                        templateCell.Text = templateCell.Format.FormatValue(item.Value);
                    templateCell.SaveState();
                    if (isEven)
                        templateCell.ApplyEvenStyle();
                    templateCell.GetData();
                    if (String.IsNullOrEmpty(templateCell.Hyperlink.Expression) &&
                      (templateCell.Hyperlink.Kind == HyperlinkKind.DetailReport ||
                      templateCell.Hyperlink.Kind == HyperlinkKind.DetailPage ||
                      templateCell.Hyperlink.Kind == HyperlinkKind.Custom))
                        templateCell.Hyperlink.Value = templateCell.Text;
                    resultCell.RunTimeAssign(templateCell, true);
                    templateCell.RestoreState();
                }
            }
            else
            {
                templateCell = CreateCell(item.IsTotal ? Res.Get("ComponentsMisc,Matrix,Total") : item.Value.ToString());
                resultCell.RunTimeAssign(templateCell, true);
            }
        }

        private void PrintColumnHeader(MatrixHeaderItem root, int left, int top, int level)
        {
            int dataWidth = 1;
            int height = HeaderHeight;
            if (Matrix.Data.Cells.Count > 1 && Matrix.CellsSideBySide)
            {
                dataWidth = Matrix.Data.Cells.Count;
                height--;
            }

            foreach (MatrixHeaderItem item in root.Items)
            {
                Matrix.ColumnValues = item.Values;
                TableCellData resultCell = ResultTable.GetCellData(left, top);
                int span = item.Span * dataWidth;

                int dy = 1;
                if (item.IsTotal)
                {
                    dy = height - top;
                    // correct evenStyleIndices
                    for (int i = level + 1; i < evenStyleIndices.Length; i++)
                        evenStyleIndices[i]++;
                }

                PrintHeaderCell(item, resultCell, evenStyleIndices[level] % 2 != 0);
                PrintColumnHeader(item, left, top + dy, level + 1);

                if (item.PageBreak && left > HeaderWidth)
                    ResultTable.Columns[left].PageBreak = true;

                left += span;
                evenStyleIndices[level]++;

                // set spans after we have printed the cell. This will handle the cell internal objects layout correctly
                resultCell.ColSpan = span;
                if (item.IsTotal)
                {
                    resultCell.RowSpan = height - top;
                }
            }

            // print cell header
            if (root.Items.Count == 0 && dataWidth > 1)
            {
                foreach (MatrixCellDescriptor descr in Matrix.Data.Cells)
                {
                    TableCell templateCell = null;
                    TableCellData resultCell = ResultTable.GetCellData(left, top);

                    if (root.TemplateColumn != null && descr.TemplateColumn != null &&
                      cellHeaderDescriptor.TemplateColumn != null && cellHeaderDescriptor.TemplateRow != null)
                    {
                        templateCell = Matrix[
                          root.TemplateColumn.Index + (descr.TemplateColumn.Index - cellHeaderDescriptor.TemplateColumn.Index),
                          cellHeaderDescriptor.TemplateRow.Index];
                    }
                    else
                        templateCell = CreateCell(ExtractColumnName(descr.Expression));

                    templateCell.SaveState();
                    templateCell.GetData();
                    resultCell.RunTimeAssign(templateCell, true);
                    templateCell.RestoreState();
                    left++;
                }
            }
        }

        private void PrintColumnHeader()
        {
            Matrix.RowValues = null;
            evenStyleIndices = new int[Matrix.Data.Columns.Count];
            PrintColumnHeader(Matrix.Data.Columns.RootItem, HeaderWidth, Matrix.ShowTitle ? 1 : 0, 0);
        }

        private void PrintRowHeader(MatrixHeaderItem root, int left, int top, int level)
        {
            int dataHeight = 1;
            int width = HeaderWidth;
            if (Matrix.Data.Cells.Count > 1 && !Matrix.CellsSideBySide)
            {
                dataHeight = Matrix.Data.Cells.Count;
                width--;
            }

            for (int index = 0; index < root.Items.Count; index++)
            {
                MatrixHeaderItem item = root.Items[index];
                Matrix.RowValues = item.Values;
                TableCellData resultCell = ResultTable.GetCellData(left, top);
                int span = item.Span * dataHeight;
                if (Matrix.SplitRows)
                {
                    MatrixHeaderItem duplicate = new MatrixHeaderItem(root);
                    duplicate.IsSplitted = true;
                    duplicate.Value = item.Value;
                    duplicate.TemplateRow = item.TemplateRow;
                    duplicate.TemplateCell = item.TemplateCell;
                    duplicate.TemplateColumn = item.TemplateColumn;

                    for (int i = 1; i < span; i++)
                    {
                        root.Items.Insert(index + 1, duplicate);
                    }
                    span = 1;
                }

                int dx = 1;
                if (item.IsTotal)
                {
                    dx = width - left;
                    // correct evenStyleIndices
                    for (int i = level + 1; i < evenStyleIndices.Length; i++)
                        evenStyleIndices[i]++;
                }

                PrintHeaderCell(item, resultCell, evenStyleIndices[level] % 2 != 0);
                PrintRowHeader(item, left + dx, top, level + 1);

                if (item.PageBreak && top > HeaderHeight)
                    ResultTable.Rows[top].PageBreak = true;

                top += span;
                evenStyleIndices[level]++;

                // set spans after we have printed the cell. This will handle the cell internal objects layout correctly
                resultCell.RowSpan = span;
                if (item.IsTotal)
                {
                    resultCell.ColSpan = width - left;
                }
            }

            // print cell header
            if (root.Items.Count == 0 && dataHeight > 1)
            {
                foreach (MatrixCellDescriptor descr in Matrix.Data.Cells)
                {
                    TableCell templateCell = null;
                    TableCellData resultCell = ResultTable.GetCellData(left, top);

                    if (root.TemplateRow != null && descr.TemplateRow != null &&
                      cellHeaderDescriptor.TemplateColumn != null && cellHeaderDescriptor.TemplateRow != null)
                    {
                        templateCell = Matrix[cellHeaderDescriptor.TemplateColumn.Index,
                          root.TemplateRow.Index + (descr.TemplateRow.Index - cellHeaderDescriptor.TemplateRow.Index)];
                    }
                    else
                        templateCell = CreateCell(ExtractColumnName(descr.Expression));

                    templateCell.SaveState();
                    templateCell.GetData();
                    resultCell.RunTimeAssign(templateCell, true);
                    templateCell.RestoreState();
                    top++;
                }
            }
        }

        private void PrintRowHeader()
        {
            Matrix.ColumnValues = null;
            evenStyleIndices = new int[Matrix.Data.Rows.Count];
            PrintRowHeader(Matrix.Data.Rows.RootItem, 0, HeaderHeight, 0);
        }

        private void PrintCorner()
        {
            List<MatrixDescriptor> rowDescr = new List<MatrixDescriptor>();
            List<MatrixDescriptor> colDescr = new List<MatrixDescriptor>();
            rowDescr.AddRange(Matrix.Data.Rows.ToArray());
            colDescr.AddRange(Matrix.Data.Columns.ToArray());
            if (Matrix.Data.Cells.Count > 1)
            {
                if (Matrix.CellsSideBySide)
                    colDescr.Add(cellHeaderDescriptor);
                else
                    rowDescr.Add(cellHeaderDescriptor);
            }

            int top = 0;
            bool firstRow = true;
            foreach (MatrixDescriptor col in colDescr)
            {
                int left = 0;
                foreach (MatrixDescriptor row in rowDescr)
                {
                    TableCell templateCell = null;
                    if (row.TemplateColumn != null && col.TemplateRow != null)
                        templateCell = Matrix[row.TemplateColumn.Index, col.TemplateRow.Index];
                    else if (firstRow)
                        templateCell = CreateCell(ExtractColumnName(row.Expression));

                    if (templateCell != null)
                    {
                        TableCellData resultCell = ResultTable.GetCellData(left, top + (Matrix.ShowTitle ? 1 : 0));
                        templateCell.SaveState();
                        if (!designTime)
                            templateCell.GetData();
                        resultCell.RunTimeAssign(templateCell, true);
                        templateCell.RestoreState();

                        // do not allow spans to go outside corner area
                        resultCell.ColSpan = Math.Min(templateCell.ColSpan, rowDescr.Count - left);
                        resultCell.RowSpan = Math.Min(templateCell.RowSpan, colDescr.Count - top);
                    }

                    left++;
                }
                firstRow = false;
                top++;
            }
        }

        private void PrintTitle()
        {
            TableCell templateCell = titleDescriptor.TemplateCell;
            if (titleDescriptor.TemplateCell == null)
                templateCell = CreateCell(Res.Get("ComponentsMisc,Matrix,Title"));

            TableCellData resultCell = ResultTable.GetCellData(HeaderWidth, 0);
            templateCell.SaveState();
            if (!designTime)
                templateCell.GetData();
            resultCell.RunTimeAssign(templateCell, true);
            resultCell.ColSpan = ResultTable.ColumnCount - HeaderWidth;
            templateCell.RestoreState();

            // print left-top cell
            if (titleDescriptor.TemplateCell == null)
                templateCell.Text = "";
            else
                templateCell = Matrix[0, 0];

            resultCell = ResultTable.GetCellData(0, 0);
            templateCell.SaveState();
            if (!designTime)
                templateCell.GetData();
            resultCell.RunTimeAssign(templateCell, true);
            templateCell.RestoreState();
            resultCell.ColSpan = HeaderWidth;
        }

        private void PrintHeaders()
        {
            PrintColumnHeader();
            PrintRowHeader();
            if (Matrix.ShowTitle)
                PrintTitle();
            PrintCorner();
        }

        private void PrintData_CalcTotals(int pass)
        {
            List<MatrixHeaderItem> columnTerminalItems = Matrix.Data.Columns.RootItem.GetTerminalItems();
            List<MatrixHeaderItem> rowTerminalItems = Matrix.Data.Rows.RootItem.GetTerminalItems();
            int dataCount = Matrix.Data.Cells.Count;
            cellValues = new object[dataCount];

            foreach (MatrixHeaderItem rowItem in rowTerminalItems)
            {
                foreach (MatrixHeaderItem columnItem in columnTerminalItems)
                {
                    if ((pass == 1 && !(rowItem.IsTotal || columnItem.IsTotal)) ||
                      (pass == 2 && (rowItem.IsTotal || columnItem.IsTotal)))
                        continue;

                    // at first we calc cells with non-custom functions
                    // prepare FCellValues array which will be used when calculating custom functions
                    for (int cellIndex = 0; cellIndex < dataCount; cellIndex++)
                    {
                        if (Matrix.Data.Cells[cellIndex].Function != MatrixAggregateFunction.Custom)
                            cellValues[cellIndex] = GetCellValue(columnItem, rowItem, cellIndex);
                    }

                    // at second we calc cells with custom functions 
                    // (to allow the custom function to use other cells' values)
                    for (int cellIndex = 0; cellIndex < dataCount; cellIndex++)
                    {
                        if (Matrix.Data.Cells[cellIndex].Function == MatrixAggregateFunction.Custom)
                            cellValues[cellIndex] = GetCellValue(columnItem, rowItem, cellIndex);
                    }

                    Matrix.Data.Cells.SetValues(columnItem.Index, rowItem.Index, cellValues);
                }
            }
        }

        private void PrintData_CalcPercents()
        {
            int dataCount = Matrix.Data.Cells.Count;

            // check if we need to do this
            bool hasPercents = false;
            for (int cellIndex = 0; cellIndex < dataCount; cellIndex++)
            {
                if (Matrix.Data.Cells[cellIndex].Percent != MatrixPercent.None)
                    hasPercents = true;
            }
            if (!hasPercents)
                return;

            List<MatrixHeaderItem> columnTerminalItems = Matrix.Data.Columns.RootItem.GetTerminalItems();
            List<MatrixHeaderItem> rowTerminalItems = Matrix.Data.Rows.RootItem.GetTerminalItems();
            cellValues = new object[dataCount];

            foreach (MatrixHeaderItem rowItem in rowTerminalItems)
            {
                foreach (MatrixHeaderItem columnItem in columnTerminalItems)
                {
                    for (int cellIndex = 0; cellIndex < dataCount; cellIndex++)
                    {
                        object cellValue = Matrix.Data.Cells.GetValue(columnItem.Index, rowItem.Index, cellIndex);
                        object totalValue = null;
                        object value = null;

                        int totalColumnIndex = Matrix.Data.Columns[0].TotalsFirst ? 0 : columnTerminalItems.Count - 1;
                        int totalRowIndex = Matrix.Data.Rows[0].TotalsFirst ? 0 : rowTerminalItems.Count - 1;

                        switch (Matrix.Data.Cells[cellIndex].Percent)
                        {
                            case MatrixPercent.None:
                                value = cellValue;
                                break;

                            case MatrixPercent.ColumnTotal:
                                totalValue = Matrix.Data.Cells.GetValue(columnTerminalItems[totalColumnIndex].Index, rowItem.Index, cellIndex);
                                break;

                            case MatrixPercent.RowTotal:
                                totalValue = Matrix.Data.Cells.GetValue(columnItem.Index, rowTerminalItems[totalRowIndex].Index, cellIndex);
                                break;

                            case MatrixPercent.GrandTotal:
                                totalValue = Matrix.Data.Cells.GetValue(columnTerminalItems[totalColumnIndex].Index, rowTerminalItems[totalRowIndex].Index, cellIndex);
                                break;
                        }

                        if (cellValue != null && totalValue != null)
                            value = ((Variant)(new Variant(cellValue) / new Variant(totalValue))).Value;

                        cellValues[cellIndex] = value;
                    }

                    Matrix.Data.Cells.SetValues(columnItem.Index, rowItem.Index, cellValues);
                }
            }
        }

        private void PrintData()
        {
            // use two passes to calc cell values. This is necessary because this calculation 
            // replaces an array of cell values by the single (aggregated) value. 
            // At the first pass we calc total values only (so they include all cell values, not aggregated ones); 
            // at the second pass we calc other values except total.
            PrintData_CalcTotals(1);
            PrintData_CalcTotals(2);
            // calc percents
            PrintData_CalcPercents();

            // fire AfterTotals event
            Matrix.OnAfterTotals(EventArgs.Empty);

            List<MatrixHeaderItem> columnTerminalItems = Matrix.Data.Columns.RootItem.GetTerminalItems();
            List<MatrixHeaderItem> rowTerminalItems = Matrix.Data.Rows.RootItem.GetTerminalItems();
            int dataCount = Matrix.Data.Cells.Count;
            int top = HeaderHeight;
            Point bodyLocation = GetBodyLocation();
            bool firstTimePrintingData = true;
            cellValues = new object[dataCount];
            Matrix.RowIndex = 0;

            foreach (MatrixHeaderItem rowItem in rowTerminalItems)
            {
                int left = HeaderWidth;
                Matrix.RowValues = rowItem.Values;
                Matrix.ColumnIndex = 0;

                foreach (MatrixHeaderItem columnItem in columnTerminalItems)
                {
                    Matrix.ColumnValues = columnItem.Values;

                    for (int cellIndex = 0; cellIndex < dataCount; cellIndex++)
                    {
                        TableCell templateCell = null;
                        TableCellData resultCell = null;
                        MatrixCellDescriptor descr = Matrix.Data.Cells[cellIndex];

                        if (Matrix.CellsSideBySide)
                        {
                            if (columnItem.TemplateColumn != null && rowItem.TemplateRow != null && descr.TemplateColumn != null)
                            {
                                templateCell = Matrix[
                                  columnItem.TemplateColumn.Index + (descr.TemplateColumn.Index - bodyLocation.X),
                                  rowItem.TemplateRow.Index];
                            }
                            else
                                templateCell = CreateDataCell();

                            resultCell = ResultTable.GetCellData(left + cellIndex, top);
                        }
                        else
                        {
                            if (columnItem.TemplateColumn != null && rowItem.TemplateRow != null && descr.TemplateColumn != null)
                            {
                                templateCell = Matrix[columnItem.TemplateColumn.Index,
                                  rowItem.TemplateRow.Index + (descr.TemplateRow.Index - bodyLocation.Y)];
                            }
                            else
                                templateCell = CreateDataCell();

                            resultCell = ResultTable.GetCellData(left, top + cellIndex);
                        }

                        if (designTime)
                        {
                            if (firstTimePrintingData)
                                templateCell.Text = "[" + ExtractColumnName(descr.Expression) + "]";
                            else
                                templateCell.Text = "";
                            resultCell.RunTimeAssign(templateCell, true);
                        }
                        else
                        {
                            object value = Matrix.Data.GetValue(columnItem.Index, rowItem.Index, cellIndex);
                            cellValues[cellIndex] = value;
                            templateCell.Text = templateCell.FormatValue(value);
                            templateCell.SaveState();
                            if (String.IsNullOrEmpty(templateCell.Hyperlink.Expression) &&
                              (templateCell.Hyperlink.Kind == HyperlinkKind.DetailReport ||
                              templateCell.Hyperlink.Kind == HyperlinkKind.DetailPage ||
                              templateCell.Hyperlink.Kind == HyperlinkKind.Custom))
                            {
                                string hyperlinkValue = "";
                                string separator = templateCell.Hyperlink.ValuesSeparator;
                                foreach (object obj in Matrix.ColumnValues)
                                {
                                    hyperlinkValue += obj.ToString() + separator;
                                }
                                foreach (object obj in Matrix.RowValues)
                                {
                                    hyperlinkValue += obj.ToString() + separator;
                                }
                                templateCell.Hyperlink.Value = hyperlinkValue.Substring(0, hyperlinkValue.Length - separator.Length);
                            }

                            int evenStyleIndex = Matrix.MatrixEvenStylePriority == MatrixEvenStylePriority.Rows ?
                              Matrix.RowIndex : Matrix.ColumnIndex;
                            if ((evenStyleIndex + 1) % 2 == 0)
                                templateCell.ApplyEvenStyle();
                            templateCell.GetData();
                            resultCell.RunTimeAssign(templateCell, true);
                            templateCell.RestoreState();
                        }
                    }

                    firstTimePrintingData = false;
                    Matrix.ColumnIndex++;
                    if (Matrix.CellsSideBySide)
                    {
                        if (Matrix.KeepCellsSideBySide)
                            ResultTable.Columns[left].KeepColumns = dataCount;
                        left += dataCount;
                    }
                    else
                        left++;
                }

                Matrix.RowIndex++;
                if (Matrix.CellsSideBySide)
                    top++;
                else
                    top += dataCount;
            }
        }

        private object GetCellValue(MatrixHeaderItem columnItem, MatrixHeaderItem rowItem, int cellIndex)
        {
            if (columnItem.IsTotal || rowItem.IsTotal)
                return GetAggregatedTotalValue(columnItem, rowItem, cellIndex);
            else
                return GetAggregatedValue(Matrix.Data.GetValues(columnItem.Index, rowItem.Index, cellIndex), cellIndex);
        }

        private object GetAggregatedTotalValue(MatrixHeaderItem column, MatrixHeaderItem row, int cellIndex)
        {
            ArrayList list = new ArrayList();

            if (column.IsTotal)
                column = column.Parent;
            if (row.IsTotal)
                row = row.Parent;

            List<MatrixHeaderItem> columnTerminalItems = column.GetTerminalItems();
            List<MatrixHeaderItem> rowTerminalItems = row.GetTerminalItems();

            // collect all values in the specified items
            foreach (MatrixHeaderItem rowItem in rowTerminalItems)
            {
                if (rowItem.IsTotal)
                    continue;

                foreach (MatrixHeaderItem columnItem in columnTerminalItems)
                {
                    if (columnItem.IsTotal)
                        continue;

                    ArrayList values = Matrix.Data.GetValues(columnItem.Index, rowItem.Index, cellIndex);
                    if (values != null)
                        list.AddRange(values);
                }
            }

            return GetAggregatedValue(list, cellIndex);
        }

        private object GetAggregatedValue(ArrayList list, int cellIndex)
        {
            if (list == null || list.Count == 0)
                return null;

            MatrixAggregateFunction function = Matrix.Data.Cells[cellIndex].Function;

            // custom function - just calculate the expression
            if (function == MatrixAggregateFunction.Custom)
                return Report.Calc(Matrix.Data.Cells[cellIndex].Expression);

            // Count function - just return the number of values
            if (function == MatrixAggregateFunction.Count)
                return list.Count;

            if (function == MatrixAggregateFunction.CountDistinct)
            {
                Hashtable distinctValues = new Hashtable();
                foreach (object value in list)
                {
                    distinctValues[value] = 1;
                }
                return distinctValues.Keys.Count;
            }

            // aggregated value
            Variant aggrValue = new Variant();

            for (int i = 0; i < list.Count; i++)
            {
                object value = list[i];
                if (i == 0)
                {
                    // assign the first value to aggrValue
                    aggrValue = new Variant(value);
                }
                else
                {
                    // handle other values
                    switch (function)
                    {
                        case MatrixAggregateFunction.Sum:
                        case MatrixAggregateFunction.Avg:
                            aggrValue += new Variant(value);
                            break;

                        case MatrixAggregateFunction.Min:
                            if (new Variant(value) < aggrValue)
                                aggrValue = new Variant(value);
                            break;

                        case MatrixAggregateFunction.Max:
                            if (new Variant(value) > aggrValue)
                                aggrValue = new Variant(value);
                            break;
                    }
                }
            }

            // finish Avg calculation
            if (function == MatrixAggregateFunction.Avg)
                aggrValue = aggrValue / list.Count;
            return aggrValue.Value;
        }
        #endregion

        #region Public Methods
        public void BuildTemplate()
        {
            bool noColumns = Matrix.Data.Columns.Count == 0;
            bool noRows = Matrix.Data.Rows.Count == 0;
            bool noCells = Matrix.Data.Cells.Count == 0;

            // create temporary descriptors
            if (noColumns)
                Matrix.Data.Columns.Add(noColumnsDescriptor);
            if (noRows)
                Matrix.Data.Rows.Add(noRowsDescriptor);
            if (noCells)
                Matrix.Data.Cells.Add(noCellsDescriptor);

            UpdateTemplateSizes();

            // prepare data for the result table
            string[] columnValues = new string[Matrix.Data.Columns.Count];
            string[] rowValues = new string[Matrix.Data.Rows.Count];
            object[] cellValues = new object[Matrix.Data.Cells.Count];
            for (int i = 0; i < Matrix.Data.Columns.Count; i++)
            {
                columnValues[i] = "[" + ExtractColumnName(Matrix.Data.Columns[i].Expression) + "]";
            }
            for (int i = 0; i < Matrix.Data.Rows.Count; i++)
            {
                rowValues[i] = "[" + ExtractColumnName(Matrix.Data.Rows[i].Expression) + "]";
            }

            Matrix.Data.Clear();
            Matrix.Data.AddValue(columnValues, rowValues, cellValues, 0);

            // create the result table
            designTime = true;
            resultTable = new TableResult();
            InitResultTable(true);
            PrintHeaders();
            PrintData();

            // copy the result table to the Matrix
            Matrix.ColumnCount = ResultTable.ColumnCount;
            Matrix.RowCount = ResultTable.RowCount;
            Matrix.FixedColumns = HeaderWidth;
            Matrix.FixedRows = HeaderHeight;
            Matrix.CreateUniqueNames();

            for (int x = 0; x < Matrix.ColumnCount; x++)
            {
                Matrix.Columns[x].Assign(ResultTable.Columns[x]);
            }
            for (int y = 0; y < Matrix.RowCount; y++)
            {
                Matrix.Rows[y].Assign(ResultTable.Rows[y]);
            }
            for (int x = 0; x < Matrix.ColumnCount; x++)
            {
                for (int y = 0; y < Matrix.RowCount; y++)
                {
                    TableCell cell = Matrix[x, y];
                    // call AssignAll with assignName parameter to preserve names of objects contained in a cell
                    ResultTable[x, y].Name = cell.Name;
                    cell.AssignAll(ResultTable[x, y], true);
                    cell.SetFlags(Flags.CanEdit, true);
                }
            }

            UpdateDescriptors();
            resultTable.Dispose();

            // clear temporary descriptors, set hints
            if (noColumns)
            {
                SetHint(Matrix[HeaderWidth, Matrix.ShowTitle ? 1 : 0], Res.Get("ComponentsMisc,Matrix,NewColumn"));
                Matrix.Data.Columns.Clear();
            }
            else
            {
                noColumnsDescriptor.TemplateColumn = Matrix.Data.Columns[0].TemplateColumn;
                noColumnsDescriptor.TemplateRow = Matrix.Data.Columns[0].TemplateRow;
                noColumnsDescriptor.TemplateCell = Matrix.Data.Columns[0].TemplateCell;
            }
            if (noRows)
            {
                SetHint(Matrix[0, HeaderHeight], Res.Get("ComponentsMisc,Matrix,NewRow"));
                Matrix.Data.Rows.Clear();
            }
            else
            {
                noRowsDescriptor.TemplateColumn = Matrix.Data.Rows[0].TemplateColumn;
                noRowsDescriptor.TemplateRow = Matrix.Data.Rows[0].TemplateRow;
                noRowsDescriptor.TemplateCell = Matrix.Data.Rows[0].TemplateCell;
            }
            if (noCells)
            {
                SetHint(Matrix[HeaderWidth, HeaderHeight], Res.Get("ComponentsMisc,Matrix,NewCell"));
                Matrix.Data.Cells.Clear();
            }
            else
            {
                noCellsDescriptor.TemplateColumn = Matrix.Data.Cells[0].TemplateColumn;
                noCellsDescriptor.TemplateRow = Matrix.Data.Cells[0].TemplateRow;
                noCellsDescriptor.TemplateCell = Matrix.Data.Cells[0].TemplateCell;
            }
        }

        public void UpdateDescriptors()
        {
            bool noColumns = Matrix.Data.Columns.Count == 0;
            bool noRows = Matrix.Data.Rows.Count == 0;
            bool noCells = Matrix.Data.Cells.Count == 0;

            // create temporary descriptors
            if (noColumns)
                Matrix.Data.Columns.Add(noColumnsDescriptor);
            if (noRows)
                Matrix.Data.Rows.Add(noRowsDescriptor);
            if (noCells)
                Matrix.Data.Cells.Add(noCellsDescriptor);

            UpdateTemplateSizes();
            Matrix.FixedColumns = HeaderWidth;
            Matrix.FixedRows = HeaderHeight;
            UpdateColumnDescriptors();
            UpdateRowDescriptors();
            UpdateCellDescriptors();
            UpdateOtherDescriptors();

            // clear temporary descriptors
            if (noColumns)
                Matrix.Data.Columns.Clear();
            if (noRows)
                Matrix.Data.Rows.Clear();
            if (noCells)
                Matrix.Data.Cells.Clear();
        }

        public void StartPrint()
        {
            if ((Matrix.Data.Columns.Count == 0 && Matrix.Data.Rows.Count == 0) || Matrix.Data.Cells.Count == 0)
                throw new Exception(String.Format(Res.Get("Messages,MatrixError"), Matrix.Name));

            designTime = false;
            noColumns = Matrix.Data.Columns.Count == 0;
            noRows = Matrix.Data.Rows.Count == 0;

            // create temporary descriptors
            if (noColumns)
                Matrix.Data.Columns.Add(noColumnsDescriptor);
            if (noRows)
                Matrix.Data.Rows.Add(noRowsDescriptor);

            Config.ReportSettings.OnProgress(Report, Res.Get("ComponentsMisc,Matrix,FillData"), 0, 0);

            Matrix.Data.Clear();
            Matrix.OnManualBuild(EventArgs.Empty);
        }

        public void AddDataRow()
        {
            object[] columnValues = new object[Matrix.Data.Columns.Count];
            object[] rowValues = new object[Matrix.Data.Rows.Count];
            object[] cellValues = new object[Matrix.Data.Cells.Count];
            string expression = "";

            for (int i = 0; i < Matrix.Data.Columns.Count; i++)
            {
                expression = Matrix.Data.Columns[i].Expression;
                columnValues[i] = String.IsNullOrEmpty(expression) ? null : Report.Calc(expression);
            }
            for (int i = 0; i < Matrix.Data.Rows.Count; i++)
            {
                expression = Matrix.Data.Rows[i].Expression;
                rowValues[i] = String.IsNullOrEmpty(expression) ? null : Report.Calc(expression);
            }
            for (int i = 0; i < Matrix.Data.Cells.Count; i++)
            {
                // skip custom function calculation; it will be calculated when we print the value
                if (Matrix.Data.Cells[i].Function == MatrixAggregateFunction.Custom)
                    cellValues[i] = 0;
                else
                    cellValues[i] = Report.Calc(Matrix.Data.Cells[i].Expression);
            }

            Matrix.Data.AddValue(columnValues, rowValues, cellValues, Matrix.DataSource.CurrentRowNo);
        }

        public void AddEmptyDataRow()
        {
            object[] columnValues = new object[Matrix.Data.Columns.Count];
            object[] rowValues = new object[Matrix.Data.Rows.Count];
            object[] cellValues = new object[Matrix.Data.Cells.Count];

            Matrix.Data.AddValue(columnValues, rowValues, cellValues, 0);
        }

        public void AddDataRows()
        {
            if (Matrix.DataSource != null)
            {
                Matrix.DataSource.Init(Matrix.Filter);
                while (Matrix.DataSource.HasMoreRows)
                {
                    AddDataRow();
                    Matrix.DataSource.Next();
                }
            }
        }

        public void FinishPrint()
        {
            if (!Matrix.Data.IsEmpty || Matrix.PrintIfEmpty)
            {
                if (Matrix.Data.IsEmpty)
                    AddEmptyDataRow();

                UpdateDescriptors();
                ResultTable.FixedColumns = HeaderWidth;
                ResultTable.FixedRows = HeaderHeight;

                InitResultTable(false);
                PrintHeaders();
                PrintData();

            }

            // clear temporary descriptors
            if (noColumns)
                Matrix.Data.Columns.Clear();
            if (noRows)
                Matrix.Data.Rows.Clear();
        }

        public void UpdateStyle()
        {
            for (int y = 0; y < Matrix.RowCount; y++)
            {
                for (int x = 0; x < Matrix.ColumnCount; x++)
                {
                    string style = x < HeaderWidth || y < HeaderHeight ? "Header" : "Body";
                    ApplyStyle(Matrix[x, y], style);
                }
            }
        }
        #endregion

        public MatrixHelper(MatrixObject matrix)
        {
            this.matrix = matrix;
            titleDescriptor = new MatrixDescriptor();
            cellHeaderDescriptor = new MatrixDescriptor();
            cellHeaderDescriptor.Expression = "Data";
            noColumnsDescriptor = new MatrixHeaderDescriptor("", false);
            noRowsDescriptor = new MatrixHeaderDescriptor("", false);
            noCellsDescriptor = new MatrixCellDescriptor();
        }
    }
}