using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using FastReport.Utils;
using FastReport.Data;
using FastReport.Design.PageDesigners.Page;

namespace FastReport.Forms
{
    internal partial class StandardReportWizardForm : BaseReportWizardForm
    {
        private Report sampleReportTabular;
        private Report sampleReportColumnar;
        private Report sampleStyleReport;
        private StyleSheet styleSheet;

        #region "Create Groups" page
        private List<Column> Groups
        {
            get
            {
                List<Column> groups = new List<Column>();
                foreach (ListViewItem item in lvGroups.Items)
                {
                    groups.Add(item.Tag as Column);
                }
                return groups;
            }
        }

        public override void ColumnsChanged()
        {
            base.ColumnsChanged();
            UpdateGroups();
        }

        private void UpdateGroups()
        {
            lvAvailableColumns1.Items.Clear();
            lvGroups.Items.Clear();

            foreach (Column column in SelectedColumns)
            {
                ListViewItem item = lvAvailableColumns1.Items.Add(column.Alias, column.GetImageIndex());
                item.Tag = column;
            }

            if (lvAvailableColumns1.Items.Count > 0)
                lvAvailableColumns1.Items[0].Selected = true;
            UpdateGroupControls();
        }

        private void UpdateGroupControls()
        {
            btnAddGroup.Enabled = lvAvailableColumns1.SelectedItems.Count > 0;
            btnRemoveGroup.Enabled = lvGroups.SelectedItems.Count > 0;

            bool reorderEnabled = lvGroups.SelectedItems.Count == 1;
            btnGroupUp.Enabled = reorderEnabled;
            btnGroupDown.Enabled = reorderEnabled;
            if (reorderEnabled)
            {
                if (lvGroups.SelectedIndices[0] == 0)
                    btnGroupUp.Enabled = false;
                if (lvGroups.SelectedIndices[0] == lvGroups.Items.Count - 1)
                    btnGroupDown.Enabled = false;
            }
        }

        private void lvAvailableColumns1_SelectedIndexChanged(object sender, EventArgs e)
        {
            UpdateGroupControls();
        }

        private void lvGroups_SelectedIndexChanged(object sender, EventArgs e)
        {
            UpdateGroupControls();
        }

        private void btnAddGroup_Click(object sender, EventArgs e)
        {
            int index = 0;
            while (lvAvailableColumns1.SelectedItems.Count > 0)
            {
                ListViewItem item = lvAvailableColumns1.SelectedItems[0];
                index = item.Index;
                lvAvailableColumns1.Items.Remove(item);
                lvGroups.Items.Add(item);
                item.Selected = false;
            }
            if (index >= lvAvailableColumns1.Items.Count)
                index = lvAvailableColumns1.Items.Count - 1;
            if (index < 0)
                index = 0;
            if (index < lvAvailableColumns1.Items.Count)
                lvAvailableColumns1.Items[index].Selected = true;
            UpdateGroupControls();
        }

        private void btnRemoveGroup_Click(object sender, EventArgs e)
        {
            int index = 0;
            while (lvGroups.SelectedItems.Count > 0)
            {
                ListViewItem item = lvGroups.SelectedItems[0];
                index = item.Index;
                lvGroups.Items.Remove(item);
                lvAvailableColumns1.Items.Add(item);
                item.Selected = false;
            }
            if (index >= lvGroups.Items.Count)
                index = lvGroups.Items.Count - 1;
            if (index < 0)
                index = 0;
            if (index < lvGroups.Items.Count)
                lvGroups.Items[index].Selected = true;
            UpdateGroupControls();
        }

        private void btnGroupUp_Click(object sender, EventArgs e)
        {
            ListViewItem item = lvGroups.SelectedItems[0];
            int index = item.Index;
            lvGroups.Items.Remove(item);
            lvGroups.Items.Insert(index - 1, item);
            item.Selected = true;
            UpdateGroupControls();
        }

        private void btnGroupDown_Click(object sender, EventArgs e)
        {
            ListViewItem item = lvGroups.SelectedItems[0];
            int index = item.Index;
            lvGroups.Items.Remove(item);
            lvGroups.Items.Insert(index + 1, item);
            item.Selected = true;
            UpdateGroupControls();
        }
        #endregion

        #region "Layout" page
        private void InitSampleReports()
        {
            sampleReportTabular = new Report();
            sampleReportTabular.Load(ResourceLoader.GetStream("samplereporttabular.frx"));
            sampleReportColumnar = new Report();
            sampleReportColumnar.Load(ResourceLoader.GetStream("samplereportcolumnar.frx"));
            UpdateReportSample();
        }

        private void UpdateReportSample()
        {
            pnPreview.Report = rbTabular.Checked ? sampleReportTabular : sampleReportColumnar;
        }

        private void rbTabular_CheckedChanged(object sender, EventArgs e)
        {
            UpdateReportSample();
        }
        #endregion

        #region "Style" page
        private void InitStyles()
        {
            styleSheet = new StyleSheet();
            styleSheet.Load(ResourceLoader.GetStream("reportstyles.frss"));
            sampleStyleReport = new Report();
            sampleStyleReport.Load(ResourceLoader.GetStream("samplestylereport.frx"));

            // localize stylesheet names
            MyRes res = new MyRes("Forms,StandardReportWizard,Styles");
            foreach (StyleCollection s in styleSheet)
            {
                s.Name = res.Get(s.Name);
            }

            lbStyles.Items.AddRange(styleSheet.ToArray());
            if (lbStyles.Items.Count > 0)
                lbStyles.SelectedIndex = 0;
        }

        private void UpdateStyleSample()
        {
            if (lbStyles.SelectedIndex != -1)
            {
                StyleCollection style = styleSheet[styleSheet.IndexOf((string)lbStyles.SelectedItem)];
                sampleStyleReport.Styles = style;
                sampleStyleReport.ApplyStyles();
            }
            pnStylePreview.FullPagePreview = true;
            pnStylePreview.Report = sampleStyleReport;
        }

        private void lbStyles_SelectedIndexChanged(object sender, EventArgs e)
        {
            UpdateStyleSample();
        }
        #endregion

        #region Create the report
        private void btnFinish_Click(object sender, EventArgs e)
        {
            CreateReport();
            DialogResult = System.Windows.Forms.DialogResult.OK;
        }

        private void CreateReport()
        {
            // disable all datasources, enable selected only
            foreach (Base c in Report.Dictionary.AllObjects)
            {
                if (c is DataSourceBase && c != DataSource)
                    (c as DataSourceBase).Enabled = false;
            }

            // create page layout
            // by default, empty report contains the following bands: ReportTitle, PageHeader, Data, PageFooter
            ReportPage page = Report.Pages[0] as ReportPage;
            page.Landscape = rbLandscape.Checked;
            float pageWidth = (page.PaperWidth - page.LeftMargin - page.RightMargin) * Units.Millimeters;
            float snapSize = ReportWorkspace.Grid.SnapSize;
            float defaultHeight = page.IsImperialUnitsUsed ? Units.Inches * 0.2f : Units.Millimeters * 5;

            // styles
            MyRes res = new MyRes("Forms,StandardReportWizard,Styles");
            if (lbStyles.SelectedIndex != -1)
            {
                StyleCollection style = styleSheet[styleSheet.IndexOf((string)lbStyles.SelectedItem)];
                styleSheet.Remove(style);
                sampleStyleReport.Styles = new StyleCollection();
                Report.Styles = style;

                // localize style names, fix fonts
                foreach (Style s in style)
                {
                    s.Name = res.Get(s.Name);
                    s.Font = new Font(DrawUtils.DefaultReportFont.Name, s.Font.Size, s.Font.Style);
                }
            }

            // title
            TextObject title = new TextObject();
            title.Parent = page.ReportTitle;
            title.CreateUniqueName();
            title.Dock = DockStyle.Fill;
            title.HorzAlign = HorzAlign.Center;
            title.VertAlign = VertAlign.Center;
            title.Text = DataSource.Alias;
            title.Style = res.Get("Title");

            // data and header
            List<Column> selectedColumns = SelectedColumns;
            DataBand dataBand = page.Bands[0] as DataBand;
            dataBand.DataSource = DataSource;

            if (rbTabular.Checked)
            {
                float[] columnWidths = new float[selectedColumns.Count];
                float columnWidth = pageWidth / selectedColumns.Count;

                // try fit to grid
                columnWidth = (int)(columnWidth / snapSize) * snapSize;
                for (int i = 0; i < selectedColumns.Count; i++)
                {
                    columnWidths[i] = columnWidth;
                }

                // compensate column widths to fit pagewidth
                float extraWidth = pageWidth - columnWidth * selectedColumns.Count;
                for (int i = 0; i < selectedColumns.Count; i++)
                {
                    if (extraWidth - snapSize < 0)
                        break;
                    columnWidths[i] += snapSize;
                    extraWidth -= snapSize;
                }

                // create data and header
                float offsetX = 0;
                for (int i = 0; i < selectedColumns.Count; i++)
                {
                    TextObject dataColumn = new TextObject();
                    dataColumn.Parent = dataBand;
                    dataColumn.CreateUniqueName();
                    dataColumn.Bounds = new RectangleF(offsetX, 0, columnWidths[i], defaultHeight);
                    dataColumn.Text = "[" + DataSource.Alias + "." + selectedColumns[i].Alias + "]";
                    dataColumn.Style = res.Get("Data");

                    TextObject headerColumn = new TextObject();
                    headerColumn.Parent = page.PageHeader;
                    headerColumn.CreateUniqueName();
                    headerColumn.Bounds = new RectangleF(offsetX, 0, columnWidths[i], defaultHeight);
                    headerColumn.Text = selectedColumns[i].Alias;
                    headerColumn.Style = res.Get("Header");

                    offsetX += columnWidths[i];
                }

                dataBand.Height = defaultHeight;
                dataBand.EvenStyle = res.Get("EvenRows");
                page.PageHeader.Height = defaultHeight + snapSize;
            }
            else
            {
                page.PageHeader = null;

                // calculate max header width
                float headerWidth = 0;
                using (TextObject tempHeader = new TextObject())
                {
                    tempHeader.Parent = dataBand;
                    tempHeader.Style = res.Get("Header");

                    for (int i = 0; i < selectedColumns.Count; i++)
                    {
                        tempHeader.Text = selectedColumns[i].Alias;
                        float width = (int)(tempHeader.CalcWidth() / snapSize + 1) * snapSize;
                        if (width > headerWidth)
                            headerWidth = width;
                    }
                }

                // create data and header
                float dataWidth = (int)((pageWidth - headerWidth) / snapSize) * snapSize;
                float offsetY = 0;
                for (int i = 0; i < selectedColumns.Count; i++)
                {
                    TextObject headerColumn = new TextObject();
                    headerColumn.Parent = dataBand;
                    headerColumn.CreateUniqueName();
                    headerColumn.Bounds = new RectangleF(0, offsetY, headerWidth, defaultHeight);
                    headerColumn.Text = selectedColumns[i].Alias;
                    headerColumn.Style = res.Get("Header");

                    TextObject dataColumn = new TextObject();
                    dataColumn.Parent = dataBand;
                    dataColumn.CreateUniqueName();
                    dataColumn.Bounds = new RectangleF(headerWidth, offsetY, dataWidth, defaultHeight);
                    dataColumn.Text = "[" + DataSource.Alias + "." + selectedColumns[i].Alias + "]";
                    dataColumn.Style = res.Get("Data");

                    offsetY += defaultHeight;
                }

                dataBand.Height = offsetY + snapSize;
            }

            // groups
            if (Groups.Count > 0)
            {
                // create group headers
                Base parent = page;
                foreach (Column column in Groups)
                {
                    GroupHeaderBand groupHeader = new GroupHeaderBand();
                    groupHeader.Parent = parent;
                    groupHeader.CreateUniqueName();
                    groupHeader.Height = defaultHeight;
                    groupHeader.Condition = "[" + DataSource.Alias + "." + column.Alias + "]";

                    groupHeader.GroupFooter = new GroupFooterBand();
                    groupHeader.GroupFooter.CreateUniqueName();
                    groupHeader.GroupFooter.Height = defaultHeight;

                    TextObject groupText = new TextObject();
                    groupText.Parent = groupHeader;
                    groupText.CreateUniqueName();
                    groupText.Dock = DockStyle.Fill;
                    groupText.Text = groupHeader.Condition;
                    groupText.Style = res.Get("Group");

                    parent = groupHeader;
                }

              // connect last header to the data
              (parent as GroupHeaderBand).Data = dataBand;
            }

            // page footer
            TextObject pageN = new TextObject();
            pageN.Parent = page.PageFooter;
            pageN.CreateUniqueName();
            pageN.Dock = DockStyle.Fill;
            pageN.HorzAlign = HorzAlign.Right;
            pageN.Text = "[PageN]";
            pageN.Style = res.Get("Footer");
            page.PageFooter.Height = defaultHeight;

            // tell the designer to reflect changes
            Report.Designer.SetModified(null, "ChangeReport");
        }
        #endregion

        private void StandardReportWizardForm_FormClosed(object sender, FormClosedEventArgs e)
        {
            Done();
        }

        public override void InitWizard(Report report)
        {
            base.InitWizard(report);
            // mono fix #3194
            btnFinish.DialogResult = System.Windows.Forms.DialogResult.None;

            InitSampleReports();
            InitStyles();
        }

        private void Done()
        {
            sampleReportColumnar.Dispose();
            sampleReportTabular.Dispose();
            sampleStyleReport.Dispose();
        }

        public override void Localize()
        {
            base.Localize();
            MyRes res = new MyRes("Forms,StandardReportWizard");
            Text = res.Get("");

            panGroups.Text = res.Get("GroupsPage");
            lblCreateGroups.Text = res.Get("CreateGroups");
            lblAvailableColumns1.Text = Res.Get("Forms,BaseReportWizard,AvailableColumns");
            lblGroups.Text = res.Get("Groups");
            panLayout.Text = res.Get("LayoutPage");
            lblLayout.Text = res.Get("DefineLayout");
            gbOrientation.Text = res.Get("Orientation");
            rbPortrait.Text = res.Get("Portrait");
            rbLandscape.Text = res.Get("Landscape");
            gbLayout.Text = res.Get("Layout");
            rbTabular.Text = res.Get("Tabular");
            rbColumnar.Text = res.Get("Columnar");
            panStyle.Text = res.Get("StylePage");
            lblStyles.Text = res.Get("Styles");
        }

        public override void UpdateDpiDependencies()
        {
            base.UpdateDpiDependencies();
            lvAvailableColumns1.SmallImageList = GetImages();
            lvGroups.SmallImageList = GetImages();
            btnGroupUp.Image = GetImage(208);
            btnGroupDown.Image = GetImage(209);
            picIcon.Image = GetImage("Images.ReportWizard.png");
        }

        public StandardReportWizardForm()
        {
            InitializeComponent();
            Localize();
            UIUtils.CheckRTL(this);
            UpdateDpiDependencies();
        }
    }
}