using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using static System.Net.Mime.MediaTypeNames;

namespace McBitFont {
    public partial class New : Form {

        public class EncodingItem {
            public string Text { get; set; }
            public int Code { get; set; }

            public EncodingItem(int code, string text) {
                Code = code;
                Text = text;
            }

            public override string ToString() {
                return Text;
            }
        }

        private MainForm mainForm;


        public New(MainForm form) {
            InitializeComponent();
            mainForm = form;
            this.Width = 300; this.Height = 250;
        }

        private void New_Load(object sender, EventArgs e) {
            toolTip1.SetToolTip(nudNewX, "Frame Width;\nCharacter width;\nDefault character width for Variable width fonts");
            toolTip1.SetToolTip(nudNewY, "Frame Height;\nCharacter height");
            toolTip1.SetToolTip(rbMono, "Monospaced font");
            toolTip1.SetToolTip(rbVar, "Variable width font");
            toolTip1.SetToolTip(cbSingle, "Create one single frame");
            toolTip1.SetToolTip(cbDigits, "Only digits characters with codes 48 - 57");
            toolTip1.SetToolTip(cbNotPrintable, "Add not printable characters with codes 0 - 31");
            toolTip1.SetToolTip(cbLatin, "Add Latin characters with codes 32 - 127");
            toolTip1.SetToolTip(cbExtended, "Add Extended characters with codes 128 - 255");

            cbEncoding.Items.Clear();
            cbEncoding.Items.Add(new EncodingItem(1250, "Central European"));
            cbEncoding.Items.Add(new EncodingItem(1251, "Cyrillic"));
            cbEncoding.Items.Add(new EncodingItem(1252, "Western European"));
            cbEncoding.Items.Add(new EncodingItem(1253, "Greek"));
            cbEncoding.Items.Add(new EncodingItem(1254, "Turkish"));
            cbEncoding.Items.Add(new EncodingItem(1255, "Hebrew"));
            cbEncoding.Items.Add(new EncodingItem(1256, "Arabic"));
            cbEncoding.Items.Add(new EncodingItem(1257, "Baltic"));
            cbEncoding.SelectedIndex = 1;
            
            lblFont.Text = dlgFont.Font.Name + " " + dlgFont.Font.Size.ToString();
            updateChars();
        }

        private void updateChars() {
            int neww, newh;
            const int pbw = 100;
            const int pbh = 124;
            int w = (int)nudNewX.Value;
            int h = (int)nudNewY.Value;
            int difw = pbw - w;
            int difh = pbh - h;
            string[] chars = { "A", "a" };
            PictureBox[] pbs = { pbChar1, pbChar2 };

            if (difw > 0) {
                if (difh > 0) {
                    //not wider, not taller
                    if (difw < difh) {
                        neww = pbw;
                        newh = h * pbw / w;
                    } else {
                        newh = pbh;
                        neww = w * pbh / h;
                    }
                } else {
                    // not wider, taller
                    newh = pbh;
                    neww = w * pbh / h;
                }
            } else {
                if (difh > 0) {
                    //wider, not taller
                    neww = pbw;
                    newh = h * pbw / w;
                } else {
                    // wider, taller
                    if (difw > difh) {
                        neww = pbw;
                        newh = h * pbw / w;
                    } else {
                        newh = pbh;
                        neww = w * pbh / h;
                    }
                }
            }


            Bitmap bmp, result;
            Graphics g;
            chars[0] = mainForm.DecodeSymbol((int)nudChar1.Value);
            chars[1] = mainForm.DecodeSymbol((int)nudChar2.Value);
            for (int i = 0; i < 2; i++) {
                bmp = new Bitmap((int)nudNewX.Value, (int)nudNewY.Value);
                g = Graphics.FromImage(bmp);
                g.Clear(Color.White);
                g.SmoothingMode = SmoothingMode.None;
                g.InterpolationMode = InterpolationMode.NearestNeighbor;
                g.PixelOffsetMode = PixelOffsetMode.Half;
                g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.SingleBitPerPixelGridFit;
                g.DrawString(chars[i], dlgFont.Font, Brushes.Black, (int)nudShiftX.Value, (int)nudShiftY.Value);
                g.Flush();

                result = new Bitmap(neww, newh);
                using (Graphics gr = Graphics.FromImage(result)) {
                    gr.InterpolationMode = InterpolationMode.NearestNeighbor;
                    gr.PixelOffsetMode = PixelOffsetMode.Half;
                    gr.DrawImage(bmp, 0, 0, neww, newh);
                }
                pbs[i].Image = result;
            }
        }

        private void btnCancel_Click(object sender, EventArgs e) {
            DialogResult = DialogResult.Cancel;
        }

        private void btnOK_Click(object sender, EventArgs e) {
            DialogResult= DialogResult.OK;
        }

        private void nudFocus(object sender, EventArgs e) {
            NumericUpDown nud = (NumericUpDown)sender;

            nud.Select(0, nud.Text.Length);
        }

        private void btnFont_Click(object sender, EventArgs e) {
            if (dlgFont.ShowDialog() == DialogResult.OK) {
                lblFont.Text = dlgFont.Font.Name + " " + dlgFont.Font.Size.ToString();
                updateChars();
            }
        }

        private void nudNewX_ValueChanged(object sender, EventArgs e) {
            updateChars();
        }

        private void checkboxChanged(object sender, EventArgs e) {
            if (!(sender as CheckBox).Focused) return;

            bool c = !cbSingle.Checked;
            bool d = !cbDigits.Checked;
            bool p = cbNotPrintable.Checked;
            bool x = cbExtended.Checked;
            bool f = cbFontBased.Checked;
            
            cbDigits.Enabled = c;
            cbNotPrintable.Enabled = c && d;
            cbLatin.Enabled = c && d;
            cbExtended.Enabled = c && d;
            cbFontBased.Enabled = c;
            cbEncoding.Enabled = c && d && x;
            rbMono.Enabled = c;
            rbVar.Enabled = c;
            pnlFont.Visible = c && f;
            if (p && x) cbLatin.Checked = true;
            this.Width = c && f ? 500 : 300;
            btnOK.Enabled = !c || !d || x || p || cbLatin.Checked;
        }
    }
}