using UnityEngine;
using UnityEngine.UI;
using UnityEngine.SceneManagement;

public class MainMenuController : MonoBehaviour
{
    [Header("Buttons")]
    [SerializeField] private Button btnPlay;
    [SerializeField] private Button btnContinue;
    [SerializeField] private Button btnWords;
    [SerializeField] private Button btnLeaderboard;
    [SerializeField] private Button btnExit;
    [SerializeField] private Button btnSettings;

    [Header("Audio")]
    [SerializeField] private AudioSource musicSource;
    [SerializeField] private AudioSource sfxSource;
    [SerializeField] private AudioClip clickSound;
    [SerializeField] private AudioClip menuMusic;

    private bool hasSave = false;

    private void Awake()
    {
        ValidateComponents();
    }

    private void Start()
    {
        DetectSaveFile();
        ConfigureContinueButton();
        PlayMenuMusic();
        BindButtonEvents();
    }

    // ===============================
    // BUTTON EVENTS
    // ===============================
    private void BindButtonEvents()
    {
        btnPlay.onClick.AddListener(() => { PlayClick(); StartNewGame(); });
        btnContinue.onClick.AddListener(() => { PlayClick(); ContinueGame(); });
        btnWords.onClick.AddListener(() => { PlayClick(); GoWords(); });
        btnLeaderboard.onClick.AddListener(() => { PlayClick(); GoLeaderboard(); });
        btnExit.onClick.AddListener(() => { PlayClick(); ExitGame(); });
        btnSettings.onClick.AddListener(() => { PlayClick(); OpenSettings(); });
    }

    private void StartNewGame()
    {
        SceneManager.LoadScene("ModeSelect");
    }

    private void ContinueGame()
    {
        int lastLevel = PlayerPrefs.GetInt("LastPlayedLevel", 1);
        SceneManager.LoadScene("GameScene_Level" + lastLevel);
    }

    private void GoWords()
    {
        SceneManager.LoadScene("WordsScene");
    }

    private void GoLeaderboard()
    {
        SceneManager.LoadScene("LeaderboardScene");
    }

    private void OpenSettings()
    {
        SceneManager.LoadScene("SettingsScene");
    }

    private void ExitGame()
    {
        PlayClick(); // click sesi varsa

#if UNITY_EDITOR
        UnityEditor.EditorApplication.isPlaying = false;
#elif UNITY_ANDROID
        Application.Quit();
        System.Diagnostics.Process.GetCurrentProcess().Kill(); 
#elif UNITY_IOS
        Application.Quit();
#else
        Application.Quit();
#endif
    }


    // ===============================
    // SAVE SYSTEM
    // ===============================
    private void DetectSaveFile()
    {
        hasSave = PlayerPrefs.HasKey("LastPlayedLevel");
    }

    private void ConfigureContinueButton()
    {
        if (!hasSave)
        {
            btnContinue.interactable = false;
            var text = btnContinue.GetComponentInChildren<Text>();
            if (text != null) text.color = new Color(1f, 1f, 1f, 0.4f);
        }
        else
        {
            btnContinue.interactable = true;
        }
    }

    // ===============================
    // AUDIO
    // ===============================
    private void PlayMenuMusic()
    {
        if (musicSource == null || menuMusic == null)
            return;

        musicSource.clip = menuMusic;
        musicSource.loop = true;

        if (!musicSource.isPlaying)
            musicSource.Play();
    }

    private void PlayClick()
    {
        if (sfxSource != null && clickSound != null)
            sfxSource.PlayOneShot(clickSound);
    }

    private void ValidateComponents()
    {
        if (btnSettings == null)
            Debug.LogWarning("Btn_Settings atanmadı!");
    }
}