using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace GeoSigmaViewer
{
    public partial class DrawTextDialog : Form
    {
        private Drawer drawer;
        private TextInformation textInfo;
        private Color textColor;
        private double ratio; //横纵比例
        private bool lockRatio;
        public DrawTextDialog(ref Drawer drawer)
        {
            InitializeComponent();
            textInfo = new TextInformation();
            this.drawer = drawer;
            textColor = Color.FromArgb(0, 0, 0);
            ratio = 0.4;
            lockRatio = true;

            if (fillTextInfo(ref textInfo))
            {
                drawer.Geo.Text_SetTextInfo(ref textInfo);
            }
        }

        private void heightTextBox_TextChanged(object sender, EventArgs e)
        {
            if (lockRatio)
            {
                double height = 0;
                double width = 0;

                try
                {
                    height = double.Parse(heightTextBox.Text);
                }
                catch (SystemException)
                {
                    return;
                }

                width = height * ratio;      
                widthTextBox.Text = width.ToString();
            }

            if (fillTextInfo(ref textInfo))
            {
                drawer.Geo.Text_SetTextInfo(ref textInfo);
                drawer.Geo.EnableRedraw(true);
                drawer.ReDraw();
            }
        }

        private bool fillTextInfo(ref TextInformation info)
        {
            info.text = this.textBox.Text;
            info.textHeight = 1000;
            info.textWidth = 400;
            info.r = textColor.R;
            info.g = textColor.G;
            info.b = textColor.B;

            try
            {
                info.textHeight = double.Parse(this.heightTextBox.Text);
                info.textWidth = double.Parse(this.widthTextBox.Text);
                info.angle = double.Parse(this.angleTextBox.Text);
            }
            catch (ArgumentNullException)
            {
                MessageBox.Show("输入信息有误,请重新输入。", "出错信息");
                return false;
            }
            catch (FormatException)
            {
                MessageBox.Show("输入信息有误,请重新输入。", "出错信息");
                return false;
            }
            catch (OverflowException)
            {
                MessageBox.Show("输入信息有误,请重新输入。", "出错信息");
                return false;
            }

            if (this.upDownCheckBox.CheckState == CheckState.Checked)
                info.bUpDown = 1;
            else
                info.bUpDown = 0;

            return true;
        }

        private void textBox_TextChanged(object sender, EventArgs e)
        {
            if (fillTextInfo(ref textInfo))
            {
                drawer.Geo.Text_SetTextInfo(ref textInfo);
                drawer.Geo.EnableRedraw(true);
                drawer.ReDraw();
            }
        }

        private void angleTextBox_TextChanged(object sender, EventArgs e)
        {
            if (fillTextInfo(ref textInfo))
            {
                drawer.Geo.Text_SetTextInfo(ref textInfo);
                drawer.Geo.EnableRedraw(true);
                drawer.ReDraw();
            }
        }

        private void widthTextBox_TextChanged(object sender, EventArgs e)
        {
            if (lockRatio)
            {
                double height = 0;
                double width = 0;

                try
                {
                    width = double.Parse(widthTextBox.Text);
                }
                catch (SystemException)
                {
                    return;
                }

                height = width / ratio;
                heightTextBox.Text = height.ToString();
            }

            if (fillTextInfo(ref textInfo))
            {
                drawer.Geo.Text_SetTextInfo(ref textInfo);
                drawer.Geo.EnableRedraw(true);
                drawer.ReDraw();
            }
        }

        private void fontButton_Click(object sender, EventArgs e)
        {
            DialogResult result = fontDialog.ShowDialog();
            if (result != DialogResult.OK)
                return;

            Font font = fontDialog.Font;

            SigmaDrawerStyle.LogFont logFont = SigmaDrawerStyle.LogFontConverter.convert(font);

            drawer.Geo.Text_SetFont(ref logFont);
            drawer.Geo.EnableRedraw(true);
            drawer.ReDraw();
        }

        private void colorButton_Click(object sender, EventArgs e)
        {
            DialogResult result = colorDialog.ShowDialog();
            if (result != DialogResult.OK)
                return;

            textColor = colorDialog.Color;
            if (fillTextInfo(ref textInfo))
            {
                drawer.Geo.Text_SetTextInfo(ref textInfo);
                drawer.Geo.EnableRedraw(true);
                drawer.ReDraw();
            }
        }

        private void upDownCheckBox_CheckedChanged(object sender, EventArgs e)
        {
            if (fillTextInfo(ref textInfo))
            {
                drawer.Geo.Text_SetTextInfo(ref textInfo);
                drawer.Geo.EnableRedraw(true);
                drawer.ReDraw();
            }
        }

        private void upDownButton_Click(object sender, EventArgs e)
        {
            SuperSubScriptDialog dlg = new SuperSubScriptDialog();
            DialogResult result = dlg.ShowDialog();
            if (result != DialogResult.OK)
                return;

            if (dlg.ScriptText.Length == 0)
                return;
            this.textBox.Text += dlg.ScriptText;

            if (fillTextInfo(ref textInfo))
            {
                drawer.Geo.Text_SetTextInfo(ref textInfo);
                drawer.Geo.EnableRedraw(true);
                drawer.ReDraw();
            }
        }

        private void OKButton_Click(object sender, EventArgs e)
        {
            if (fillTextInfo(ref textInfo))
            {
                drawer.Geo.Text_SetTextInfo(ref textInfo);
                drawer.Geo.Text_Create();

                drawer.Geo.EnableRedraw(true);
                drawer.ReDraw();
            }

            drawer.ActiveTool = DrawToolType.Select;
            Close();
        }

        private void cancelButton_Click(object sender, EventArgs e)
        {
            drawer.ActiveTool = DrawToolType.Select;
            Close();
        }

        private void ratioCheckBox_CheckedChanged(object sender, EventArgs e)
        {
            if (CheckState.Checked == ratioCheckBox.CheckState)
            {
                lockRatio = true;
                double height = 0;
                double width = 0;

                try
                {
                    height = double.Parse(heightTextBox.Text);
                    width = double.Parse(widthTextBox.Text);
                }
                catch (SystemException)
                {
                    return;
                }
 
                if (Math.Abs(height) > 1e-30 && Math.Abs(height) > 1e-30)
                    ratio = width / height;
            }
            else
                lockRatio = false;
        }
    }
}