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

namespace Test_Merge
{
    public partial class Form1 : Form
    {
        Reader Reader = null;
        F1TVEmulator Emulator = null;
        private bool cancelRequested = false;
        private SemaphoreSlim semaphore = new SemaphoreSlim(1);

        string ConfigFile = "";
        string GpUrl = "";

        public Form1()
        {
            InitializeComponent();
        }
        public async void RefreshUI()
        {

        }
        private async void btnSettings_Click(object sender, EventArgs e)
        {
            if(Emulator != null)
                Emulator.Stop();
            Settings settingsForm = new Settings();
            settingsForm.ShowDialog();
            //MessageBox.Show(settingsForm.GrandPrixUrl + Environment.NewLine + settingsForm.GrandPrixName + Environment.NewLine + settingsForm.GrandPrixYear);
            if(settingsForm.GrandPrixUrl != "" && settingsForm.SelectedConfigFile != "")
            {
                GpUrl = settingsForm.GrandPrixUrl;
                if (File.Exists(settingsForm.SelectedConfigFile))
                {
                    ConfigFile = settingsForm.SelectedConfigFile;
                }
                else
                {
                    MessageBox.Show("The config file has not been found please return to the config and change it");
                }
            }
            else
            {
                MessageBox.Show("There is no URL for the Grand Prix you want to decode. Please return to the config and add a valid one");
            }
        }

        private async void Form1_Load(object sender, EventArgs e)
        {
            //Those are the default values but they will need to be changed later when the configuration has been done
            ConfigFile = "./Presets/Clean_4K_2023.json";
            GpUrl = "https://f1tv.formula1.com/detail/1000006688/2023-azerbaijan-grand-prix?action=play";
        }

        private async void btnUpdate_Click(object sender, EventArgs e)
        {
            cancelRequested = false;
            if (Emulator != null && Reader != null)
            {
                // Disable UI controls to prevent re-entrancy
                btnStartDecoding.Enabled = false;
                btnStopUpdating.Enabled = true;
                btnSettings.Enabled = false;
                while (!cancelRequested)
                {
                    await semaphore.WaitAsync();

                    try
                    {
                        // Start the time-consuming task on a separate thread
                        await Task.Run(async () =>
                        {
                            Stopwatch sw = new Stopwatch();
                            sw.Start();

                            Bitmap screen = Emulator.Screenshot();
                            screen.Save("HopefullyDataScreenshot.png");
                            Reader.ChangeImage(screen);

                            string result = await Reader.Decode(Reader.MainZones, Reader.Drivers);
                            sw.Stop();
                        // Task completed
                            Invoke((MethodInvoker)delegate
                            {
                                DisplayResults(result, sw, screen);
                            });
                        });
                    }
                    finally
                    {
                        semaphore.Release();
                    }
                }
                // Re-enable UI controls
                btnStartDecoding.Enabled = true;
                btnStopUpdating.Enabled = false;
                btnSettings.Enabled = true;
            }
        }
        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (Emulator != null)
            {
                Emulator.Stop();
            }
        }
        private void DisplayResults(string result, Stopwatch sw, Bitmap screen)
        {
            if (result == "")
            {
                cancelRequested = true;
                MessageBox.Show("An error has occured while trying to recover data from live feed. This can happen sometimes. I would advise you to restart a few times. If the problem persists check your configuration.");
            }
            else
            {
                tbxResult.Text = "";
                tbxResult.Text = "Decoding done in :" + sw.ElapsedMilliseconds + "ms" + Environment.NewLine;
                tbxResult.Text += result;
                pbxResult.Image = screen;
            }
        }

        private void btnStopUpdating_Click(object sender, EventArgs e)
        {
            // Set the cancellation flag
            cancelRequested = true;
        }

        private async void button1_Click(object sender, EventArgs e)
        {
            btnResetEmulator.Enabled = false;
            btnSettings.Enabled = false;
            btnStartDecoding.Enabled = false;
            btnStopUpdating.Enabled = false;
            int errorCode = -1;
            await Task.Run(async () =>
            {
                if (Emulator != null)
                    Emulator.ResetDriver();

                Emulator = null;
                Reader = null;

                Emulator = new F1TVEmulator(GpUrl);
                errorCode = await Emulator.Start();
            });

            if (errorCode != 0)
            {
                //IMPLEMENT MORE SPECIFIC ERROR CODES !!
                MessageBox.Show("An error has occured while trying to start the driver.");
                btnResetEmulator.Enabled = true;
            }
            else
            {
                Reader = new Reader(ConfigFile, Emulator.Screenshot(), true);
                btnResetEmulator.Enabled = true;
                btnSettings.Enabled = true;
                btnStartDecoding.Enabled = true;
            }
        }
    }
}