using System.Net;
using System.Text;
using NAudio.Wave;

class Program
{
    private static WaveOutEvent? outputDevice;
    private static MediaFoundationReader? audioStream;
    private static bool isPaused = false;
    private static float volume = 0.5f;
    private static bool isRunning = true;
    private static string streamUrl = "";
    private static string currentTrack = "Неизвестно";

    static void Main()
    {
        Console.Title = "Radio CLI";
        Console.CursorVisible = false;
        Console.WindowHeight = 7;
        Console.WindowWidth = 60;

        SelectStation();

        Thread metadataThread = new Thread(GetStreamMetadata) { IsBackground = true };
        metadataThread.Start();

        try
        {
            StartPlayback();

            while (isRunning)
            {
                DisplayCompactUI();
                var key = Console.ReadKey(true).Key;
                switch (key)
                {
                    case ConsoleKey.P:
                        TogglePause();
                        break;
                    case ConsoleKey.Add:
                    case ConsoleKey.OemPlus:
                        AdjustVolume(0.05f);
                        break;
                    case ConsoleKey.Subtract:
                    case ConsoleKey.OemMinus:
                        AdjustVolume(-0.05f);
                        break;
                    case ConsoleKey.Q:
                        isRunning = false;
                        break;
                }
            }
        }
        catch (Exception ex)
        {
            Console.WriteLine($"Ошибка: {ex.Message}");
        }
        finally
        {
            StopPlayback();
            Console.CursorVisible = true;
            Console.WriteLine("\nРадио остановлено. Нажмите любую клавишу...");
            Console.ReadKey();
        }
    }

    static void SelectStation()
    {
        Console.Clear();
        Console.WriteLine("Выберите радиостанцию:");
        Console.WriteLine("1) DALA FM (http://178.88.167.62:8080/DALA_320)");
        Console.WriteLine("2) Руки Вверх! (https://stream03.pcradio.ru/Ruki_Vverh-med)");
        Console.WriteLine("3) Дорожное Радио (http://dorognoe.hostingradio.ru:8000/radio)");
        Console.WriteLine("4) Ввести свою ссылку");
        Console.Write("Введите номер (1-4): ");

        string choice = Console.ReadLine() ?? "";
        switch (choice)
        {
            case "1":
                streamUrl = "http://178.88.167.62:8080/DALA_320";
                break;
            case "2":
                streamUrl = "https://stream03.pcradio.ru/Ruki_Vverh-med";
                break;
            case "3":
                streamUrl = "http://dorognoe.hostingradio.ru:8000/radio";
                break;
            case "4":
                Console.Write("Введите ссылку на поток: ");
                streamUrl = Console.ReadLine() ?? "";
                break;
            default:
                Console.WriteLine("Некорректный ввод, попробуйте снова.");
                SelectStation();
                break;
        }
    }

    static void StartPlayback()
    {
        try
        {
            audioStream = new MediaFoundationReader(streamUrl);
            outputDevice = new WaveOutEvent();
            outputDevice.Init(audioStream);
            outputDevice.Volume = volume;
            outputDevice.Play();
        }
        catch (Exception ex)
        {
            Console.WriteLine($"Ошибка воспроизведения: {ex.Message}");
        }
    }

    static void DisplayCompactUI()
    {
        Console.Clear();
        Console.WriteLine("┌──────────────────────────────────────────────┐");
        Console.WriteLine("│           DALA FM - Народное радио           │");
        Console.WriteLine("├──────────────────────────────────────────────┤");
        Console.WriteLine($"│ Статус: {(isPaused ? "Пауза" : "Играет").PadRight(8)} Громкость: {(int)(volume * 100)}% │");
        Console.WriteLine("├──────────────────────────────────────────────┤");
        Console.WriteLine($"│ Сейчас играет: {currentTrack.PadRight(30)} │");
        Console.WriteLine("├──────────────────────────────────────────────┤");
        Console.WriteLine("│ P:Пауза  +/-:Громкость  Q:Выход             │");
        Console.WriteLine("└──────────────────────────────────────────────┘");
    }

    static void TogglePause()
    {
        if (outputDevice == null) return;

        if (isPaused)
        {
            outputDevice.Play();
            isPaused = false;
        }
        else
        {
            outputDevice.Pause();
            isPaused = true;
        }
    }

    static void AdjustVolume(float delta)
    {
        if (outputDevice == null) return;

        volume = Math.Clamp(volume + delta, 0f, 1f);
        outputDevice.Volume = volume;
    }

    static void StopPlayback()
    {
        outputDevice?.Stop();
        outputDevice?.Dispose();
        audioStream?.Dispose();
    }

    static void GetStreamMetadata()
    {
        try
        {
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(streamUrl);
            request.Headers.Add("Icy-MetaData", "1");
            request.Timeout = 5000;

            using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
            using (Stream stream = response.GetResponseStream())
            {
                if (stream == null) return;
                byte[] buffer = new byte[4096];
                int bytesRead;
                while ((bytesRead = stream.Read(buffer, 0, buffer.Length)) > 0 && isRunning)
                {
                    string responseString = Encoding.UTF8.GetString(buffer, 0, bytesRead);
                    if (responseString.Contains("StreamTitle='"))
                    {
                        int start = responseString.IndexOf("StreamTitle='") + 13;
                        int end = responseString.IndexOf("';", start);
                        if (end > start)
                        {
                            currentTrack = responseString[start..end];
                        }
                    }
                    Thread.Sleep(2000);
                }
            }
        }
        catch (Exception)
        {
            currentTrack = "Не удалось получить метаданные";
        }
    }
}