using System;
using System.Drawing;
using System.Drawing.Printing;
using FastReport.Utils;
using FastReport.TypeConverters;
using FastReport.Design.PageDesigners.Page;

namespace FastReport.Forms
{
    internal partial class CustomLabelForm : BaseDialogForm
    {
        private XmlItem labelParameters;
        private PrinterSettings printerSettings;
        private Report sampleReport;
        private bool updating;

        public XmlItem LabelParameters
        {
            get { return labelParameters; }
        }

        private string ConvertMMtoUnits(float value)
        {
            return Converter.ToString(value, typeof(PaperConverter));
        }

        private float ConvertUnitsToInches(string value)
        {
            float floatValue = Converter.StringToFloat(value, true);
            switch (ReportWorkspace.Grid.GridUnits)
            {
                case PageUnits.Centimeters:
                    floatValue /= 2.54f;
                    break;

                case PageUnits.HundrethsOfInch:
                    floatValue /= 100;
                    break;

                case PageUnits.Inches:
                    // do nothing
                    break;

                case PageUnits.Millimeters:
                    floatValue /= 25.4f;
                    break;
            }

            return floatValue;
        }

        private string ConvertToXml(float value)
        {
            return Converter.ToString(Math.Round(value, 3));
        }

        private void UpdateSample()
        {
            float paperWidth = ConvertUnitsToInches(tbPaperWidth.Text);
            float paperHeight = ConvertUnitsToInches(tbPaperHeight.Text);
            float leftMargin = ConvertUnitsToInches(tbLeftMargin.Text);
            float topMargin = ConvertUnitsToInches(tbTopMargin.Text);

            float labelWidth = ConvertUnitsToInches(tbLabelWidth.Text);
            float labelHeight = ConvertUnitsToInches(tbLabelHeight.Text);
            int rows = (int)udRows.Value;
            int columns = (int)udColumns.Value;
            float rowGap = ConvertUnitsToInches(tbRowGap.Text);
            float columnGap = ConvertUnitsToInches(tbColumnGap.Text);

            labelParameters.Name = "";
            labelParameters.ClearProps();

            labelParameters.SetProp("Name", tbName.Text);
            labelParameters.SetProp("Width", ConvertToXml(labelWidth));
            labelParameters.SetProp("Height", ConvertToXml(labelHeight));
            labelParameters.SetProp("PaperWidth", ConvertToXml(paperWidth));
            labelParameters.SetProp("PaperHeight", ConvertToXml(paperHeight));
            if (cbLandscape.Checked)
                labelParameters.SetProp("Landscape", "true");
            labelParameters.SetProp("LeftMargin", ConvertToXml(leftMargin));
            labelParameters.SetProp("TopMargin", ConvertToXml(topMargin));
            labelParameters.SetProp("Rows", rows.ToString());
            labelParameters.SetProp("Columns", columns.ToString());
            labelParameters.SetProp("RowGap", ConvertToXml(rowGap));
            labelParameters.SetProp("ColumnGap", ConvertToXml(columnGap));

            ReportPage page = sampleReport.Pages[0] as ReportPage;
            page.Clear();
            page.Landscape = cbLandscape.Checked;
            page.PaperWidth = paperWidth * 25.4f;
            page.PaperHeight = paperHeight * 25.4f;
            page.LeftMargin = leftMargin * 25.4f;
            page.TopMargin = topMargin * 25.4f;

            DataBand band = new DataBand();
            band.Parent = page;

            bool fit = true;
            for (int x = 0; x < columns; x++)
            {
                for (int y = 0; y < rows; y++)
                {
                    ShapeObject shape = new ShapeObject();
                    shape.Parent = band;
                    shape.Shape = ShapeKind.RoundRectangle;
                    shape.Border.Color = Color.Gray;
                    shape.Bounds = new RectangleF(x * (labelWidth + columnGap) * 96,
                      y * (labelHeight + rowGap) * 96,
                      labelWidth * 96,
                      labelHeight * 96);
                    if (shape.Right / Units.Millimeters > page.PaperWidth - page.LeftMargin + 0.1f ||
                      shape.Bottom / Units.Millimeters > page.PaperHeight - page.TopMargin + 0.1f)
                    {
                        (shape.Fill as SolidFill).Color = Color.Red;
                        fit = false;
                    }
                }
            }

            rcSample.Report = sampleReport;
            lblWarning.Visible = !fit;
            btnOk.Enabled = fit;
        }

        private void cbxPaper_SelectedIndexChanged(object sender, EventArgs e)
        {
            if (updating)
                return;
            foreach (PaperSize ps in printerSettings.PaperSizes)
            {
                if (ps.PaperName == (string)cbxPaper.SelectedItem)
                {
                    float psWidth = ps.Width / 100f * 25.4f;
                    float psHeight = ps.Height / 100f * 25.4f;
                    if (ps.Kind == PaperKind.A4)
                    {
                        psWidth = 210;
                        psHeight = 297;
                    }
                    if (cbLandscape.Checked)
                    {
                        float ex = psWidth;
                        psWidth = psHeight;
                        psHeight = ex;
                    }

                    updating = true;
                    tbPaperWidth.Text = ConvertMMtoUnits(psWidth);
                    tbPaperHeight.Text = ConvertMMtoUnits(psHeight);
                    updating = false;
                    break;
                }
            }
            UpdateSample();
        }

        private void cbLandscape_CheckedChanged(object sender, EventArgs e)
        {
            if (updating)
                return;
            string w = tbPaperWidth.Text;
            string h = tbPaperHeight.Text;

            // avoid reset papersize to custom
            updating = true;
            tbPaperWidth.Text = h;
            tbPaperHeight.Text = w;
            updating = false;
            UpdateSample();
        }

        private void tbPaperWidth_TextChanged(object sender, EventArgs e)
        {
            if (updating)
                return;
            cbxPaper.SelectedIndex = 0;
            UpdateSample();
        }

        private void tbLeftMargin_TextChanged(object sender, EventArgs e)
        {
            if (updating)
                return;
            UpdateSample();
        }

        public void Init(string suggestedName)
        {
            labelParameters = new XmlItem();
            printerSettings = new PrinterSettings();
            sampleReport = new Report();
            sampleReport.Pages.Add(new ReportPage());
            sampleReport.SmoothGraphics = true;

            tbName.Text = suggestedName;

            // paper
            PaperSize defaultPaper = printerSettings.DefaultPageSettings.PaperSize;
            cbxPaper.Items.Add(Res.Get("Forms,PageSetup,Custom"));
            foreach (PaperSize ps in printerSettings.PaperSizes)
            {
                cbxPaper.Items.Add(ps.PaperName);
                if (ps.PaperName == defaultPaper.PaperName)
                    cbxPaper.SelectedIndex = cbxPaper.Items.Count - 1;
            }

            tbLeftMargin.Text = ConvertMMtoUnits(0);
            tbTopMargin.Text = ConvertMMtoUnits(0);

            // label
            tbLabelWidth.Text = ConvertMMtoUnits(defaultPaper.Width / 100f * 25.4f / 2);
            tbLabelHeight.Text = ConvertMMtoUnits(defaultPaper.Height / 100f * 25.4f / 2);
            udRows.Value = 2;
            udColumns.Value = 2;
            tbRowGap.Text = ConvertMMtoUnits(0);
            tbColumnGap.Text = ConvertMMtoUnits(0);
        }

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

            lblName.Text = res.Get("Name");
            gbPaper.Text = res.Get("Paper");
            cbLandscape.Text = res.Get("Landscape");
            lblPaperWidth.Text = res.Get("PaperWidth");
            lblPaperHeight.Text = res.Get("PaperHeight");
            lblLeftMargin.Text = res.Get("LeftMargin");
            lblTopMargin.Text = res.Get("TopMargin");
            gbLabel.Text = res.Get("Label");
            lblLabelWidth.Text = res.Get("LabelWidth");
            lblLabelHeight.Text = res.Get("LabelHeight");
            lblRows.Text = Res.Get("Forms,LabelWizard,Rows");
            lblColumns.Text = Res.Get("Forms,LabelWizard,Columns");
            lblRowGap.Text = res.Get("RowGap");
            lblColumnGap.Text = res.Get("ColumnGap");
            gbSample.Text = Res.Get("Misc,Sample");
            lblWarning.Text = res.Get("Warning");
        }

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