using System;

using System.Windows.Forms;

using System.Collections.Generic;

using System.Linq;

using System.Drawing;

namespace Contours {

    public class MainForm: Form {

        Button bTest;

        ComboBox cbTests;

        ComboBox cbViews;

        public MainForm() {

            Width = 800;

            Height = 600;

            bTest = new Button();

            bTest.Left = 20;

            bTest.Top = 20;

            bTest.Text = "test";

            bTest.Click += bTestClicked;

            Controls.Add(bTest);

            cbTests = new ComboBox();

            cbTests.Left = bTest.Right + 20;

            cbTests.Top = 20;

            cbTests.SelectedIndexChanged += cbTestsChanged;

            Controls.Add(cbTests);

            cbViews = new ComboBox();

            cbViews.Left = cbTests.Right + 20;

            cbViews.Top = 20;

            cbViews.SelectedIndexChanged += cbViewsChanged;

            Controls.Add(cbViews);

            MouseDown += mouseDown;

            MouseMove += mouseMove;

            MouseUp += mouseUp;

            Paint += paint;

        }

        bool drawing = false;

        List<List<PointF>> contours = new List<List<PointF>>();

        void bTestClicked(object sender, EventArgs e) {

            Test.loadTestsFromFile("tests.txt");

            bool success = Test.runAll();

            Test.saveReport("report.txt");

            foreach(Test test in Test.tests)

                cbTests.Items.Add(test.name);

            if (!success) MessageBox.Show("Tests failed");

        }

        void cbTestsChanged(object sender, EventArgs e) {

            cbViews.Items.Clear();

            foreach(Test test in Test.tests) {

                if (cbTests.Text == test.name) {

                    foreach(string name in test.input.Keys)

                        cbViews.Items.Add("i: " + name);

                    foreach(string name in test.output.Keys)

                        cbViews.Items.Add("o: " + name);

                }

            }

        }

        void cbViewsChanged(object sender, EventArgs e) {

            Refresh();

        }

        private void mouseDown(object sender, MouseEventArgs e) {

            if (e.Button == MouseButtons.Left) {

                contours.Add(new List<PointF>());

                drawing = true;

                mouseMove(sender, e);

            }

        }

        private void mouseMove(object sender, MouseEventArgs e) {

            if (drawing) {

                contours.Last().Add(new PointF(e.Location.X, e.Location.Y));

                Refresh();

            }

        }

        private void mouseUp(object sender, MouseEventArgs e) {

            if (e.Button == MouseButtons.Left) {

                mouseMove(sender, e);

                drawing = false;

            }

            if (e.Button == MouseButtons.Right) {

                drawing = false;

                contours.Clear();

                Refresh();

            }

        }

        void drawContour(Graphics g, Color color, List<PointF> c) {

            if (c != null && c.Count >= 3) {

                g.DrawLines(new Pen(new SolidBrush(color)), c.ToArray());

                g.DrawLine(new Pen(new SolidBrush(color)), c.First(), c.Last());

            }

        }

        void drawContour(Graphics g, Color color, List<Point> c) {

            if (c != null && c.Count >= 3) {

                g.DrawLines(new Pen(new SolidBrush(color)), c.ToArray());

                g.DrawLine(new Pen(new SolidBrush(color)), c.First(), c.Last());

            }

        }

        private void paint(object sender, PaintEventArgs e) {

            e.Graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;

            foreach(List<PointF> c in contours)

                drawContour(e.Graphics, Color.Gray, c);

            List<List<List<Point>>> testContours = null;

            foreach(Test test in Test.tests) {

                if (cbTests.Text == test.name) {

                    foreach(KeyValuePair<string, List<List<List<Point>>>> pair in test.input)

                        if (cbViews.Text == "i: " + pair.Key)

                            testContours = pair.Value;

                    foreach(KeyValuePair<string, List<List<List<Point>>>> pair in test.output)

                        if (cbViews.Text == "o: " + pair.Key)

                            testContours = pair.Value;

                }

            }

            System.Drawing.Drawing2D.Matrix m = e.Graphics.Transform;

            e.Graphics.TranslateTransform(50, 100);

            if (testContours != null) {

                foreach(List<List<Point>> group in testContours) {

                    Color color = Color.Black;

                    foreach(List<Point> c in group) {

                        drawContour(e.Graphics, color, c);

                        color = Color.Blue;

                    }

                }

            }

            e.Graphics.Transform = m;

        }

    }

}