using System;
using System.Drawing;
using System.Windows.Forms;
using System.Drawing.Printing;
using FastReport.Utils;
using FastReport.TypeConverters;

namespace FastReport.Forms
{
    internal partial class PreviewPageSetupForm : BaseDialogForm
    {
        private PrinterSettings printerSettings;
        private ReportPage page;
        private bool updating;

        public ReportPage Page
        {
            get { return page; }
            set
            {
                page = value;
                UpdateControls();
            }
        }

        public bool ApplyToAll
        {
            get { return cbApply.Checked; }
        }

        public bool ApplyToAllEnabled
        {
            get { return cbApply.Enabled; }
            set
            {
                cbApply.Enabled = value;
                if (!value)
                    cbApply.Checked = false;
            }
        }

        private bool Equal(float a, float b)
        {
            return Math.Abs(a - b) < 2;
        }

        private bool PaperSizeEqual(PaperSize ps, float width, float height)
        {
            float psWidth = ps.Width / 100f * 25.4f;
            float psHeight = ps.Height / 100f * 25.4f;
            return (Equal(psWidth, width) && Equal(psHeight, height)) ||
              (Equal(psWidth, height) && Equal(psHeight, width));
        }

        private void Swap(ref float a, ref float b)
        {
            float c = a;
            a = b;
            b = c;
        }

        private void UpdateControls()
        {
            updating = true;
            MyRes res = new MyRes("Forms,PageSetup");

            string savePrinterName = printerSettings.PrinterName;
            printerSettings.PrinterName = Page.Report.PrintSettings.Printer;
            if (!printerSettings.IsValid)
                printerSettings.PrinterName = savePrinterName;

            // paper
            cbxPaper.Items.Add(res.Get("Custom"));
            foreach (PaperSize ps in printerSettings.PaperSizes)
            {
                cbxPaper.Items.Add(ps.PaperName);
                if (cbxPaper.SelectedIndex == -1 && PaperSizeEqual(ps, Page.PaperWidth, Page.PaperHeight))
                    cbxPaper.SelectedIndex = cbxPaper.Items.Count - 1;
            }
            if (cbxPaper.SelectedIndex == -1)
                cbxPaper.SelectedIndex = 0;
            tbWidth.Text = Converter.ToString(Page.PaperWidth, typeof(PaperConverter));
            tbHeight.Text = Converter.ToString(Page.PaperHeight, typeof(PaperConverter));

            // orientation
            rbPortrait.Checked = !Page.Landscape;
            rbLandscape.Checked = Page.Landscape;

            // margins
            tbLeft.Text = Converter.ToString(Page.LeftMargin, typeof(PaperConverter));
            tbRight.Text = Converter.ToString(Page.RightMargin, typeof(PaperConverter));
            tbTop.Text = Converter.ToString(Page.TopMargin, typeof(PaperConverter));
            tbBottom.Text = Converter.ToString(Page.BottomMargin, typeof(PaperConverter));

            updating = false;
        }

        private void UpdatePage()
        {
            Page.Landscape = rbLandscape.Checked;
            Page.PaperWidth = (float)Converter.FromString(tbWidth.Text, typeof(PaperConverter));
            Page.PaperHeight = (float)Converter.FromString(tbHeight.Text, typeof(PaperConverter));
            Page.LeftMargin = (float)Converter.FromString(tbLeft.Text, typeof(PaperConverter));
            Page.RightMargin = (float)Converter.FromString(tbRight.Text, typeof(PaperConverter));
            Page.TopMargin = (float)Converter.FromString(tbTop.Text, typeof(PaperConverter));
            Page.BottomMargin = (float)Converter.FromString(tbBottom.Text, typeof(PaperConverter));
        }

        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 (rbLandscape.Checked)
                        Swap(ref psWidth, ref psHeight);

                    updating = true;
                    tbWidth.Text = Converter.ToString(psWidth, typeof(PaperConverter));
                    tbHeight.Text = Converter.ToString(psHeight, typeof(PaperConverter));
                    updating = false;
                    break;
                }
            }
        }

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

        private void rbPortrait_CheckedChanged(object sender, EventArgs e)
        {
            if (updating || !(sender as RadioButton).Checked)
                return;
            string m1 = tbLeft.Text;   //     m3
            string m2 = tbRight.Text;  //  m1    m2
            string m3 = tbTop.Text;    //     m4
            string m4 = tbBottom.Text; //
            string w = tbWidth.Text;
            string h = tbHeight.Text;

            // avoid reset papersize to custom
            updating = true;
            tbWidth.Text = h;
            tbHeight.Text = w;

            if (rbLandscape.Checked)
            {
                tbLeft.Text = m3;       // rotate counter-clockwise
                tbRight.Text = m4;
                tbTop.Text = m2;
                tbBottom.Text = m1;
            }
            else
            {
                tbLeft.Text = m4;       // rotate clockwise
                tbRight.Text = m3;
                tbTop.Text = m1;
                tbBottom.Text = m2;
            }

            updating = false;
            pnOrientation.Refresh();
        }

        private void pnOrientation_Paint(object sender, PaintEventArgs e)
        {
            using (Bitmap bmp = this.GetImage(rbPortrait.Checked ? "Images.Portrait.png" : "Images.Landscape.png"))
            {
                e.Graphics.DrawImage(bmp, (pnOrientation.Width - bmp.Width) / 2, (pnOrientation.Height - bmp.Height) / 2);
            }
        }

        private void PreviewPageSetupForm_FormClosed(object sender, FormClosedEventArgs e)
        {
            if (DialogResult == DialogResult.OK)
                UpdatePage();
        }

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

            gbPaper.Text = res.Get("Paper");
            lblWidth.Text = res.Get("Width");
            lblHeight.Text = res.Get("Height");
            gbOrientation.Text = res.Get("Orientation");
            rbPortrait.Text = res.Get("Portrait");
            rbLandscape.Text = res.Get("Landscape");
            gbMargins.Text = res.Get("Margins");
            lblLeft.Text = res.Get("Left");
            lblRight.Text = res.Get("Right");
            lblTop.Text = res.Get("Top");
            lblBottom.Text = res.Get("Bottom");
            cbApply.Text = Res.Get("Forms,PreviewPageSetup,Apply");
        }


        public PreviewPageSetupForm()
        {
            InitializeComponent();
            Localize();
            printerSettings = new PrinterSettings();
            UIUtils.CheckRTL(this);
        }
    }
}