using UnityEngine;
using UnityEngine.UI;
using UnityEngine.Events;

public class btmandtopController : MonoBehaviour
{
    [Header("player unique so")]
    public Player_SO player_SO;
    [Header("put prefabs here")]
    public GameObject putPrefabsHere;
    [Header("son buttons")]
    public Button settings_launch;
    public Button userInfo_launch;
    public Button store_launch;
    public Button showLevel_display;
    public Button email_display;
    public Button notice_display;

    public Button button_Music;
    [Header("MusicPic")]
    public RectTransform musicPicRoot;
    public bool showMusicPicInUI = false;
    public string uiSceneName = "UI_UI";
    public float musicPicFadeTime = 0.25f;

    [Header("sig prefabs")]
    public GameObject showLevel_prefab;
    public GameObject store_prefab;
    public GameObject settings_prefab;
    public GameObject userInfo_prefab;
    public GameObject email_prefab;
    public GameObject notice_prefab;

    private UnityAction instantiateSettings;
    private UnityAction instantiateUserInfo;
    private UnityAction instantiateStore;
    private UnityAction instantiateShowLevel;
    private UnityAction instantiateEmail;
    private UnityAction instantiateNotice;

    // cached reference to the settings instance to ensure only one exists
    private GameObject settingsInstance;
    private GameObject showLevelInstance;
    private GameObject emailInstance;
    private GameObject noticeInstance;
    private CanvasGroup musicPicGroup;
    private Coroutine musicPicFade;
    private bool musicPicVisible = true;

    void Awake()
    {
        EnsureMusicPicRoot();
    }

    void Start()
    {
        if (button_Music == null)
        {
            var btn = transform.Find("Button_Music") as RectTransform;
            if (btn != null)
                button_Music = btn.GetComponent<Button>();
            if (button_Music == null)
            {
                var any = FindByName("Button_Music");
                if (any != null) button_Music = any.GetComponent<Button>();
            }
        }
        instantiateSettings = () => ToggleSettingsPrefab();
        instantiateUserInfo = () => InstantiatePrefab(userInfo_prefab);
        instantiateStore = () => InstantiatePrefab(store_prefab);
        instantiateShowLevel = () => ShowLevelPrefab();
        instantiateEmail = () => ShowEmailPrefab();
        instantiateNotice = () => ShowNoticePrefab();

        if (settings_launch != null)
            settings_launch.onClick.AddListener(instantiateSettings);
        if (userInfo_launch != null)
            userInfo_launch.onClick.AddListener(instantiateUserInfo);
        if (store_launch != null)
            store_launch.onClick.AddListener(instantiateStore);
        if (showLevel_display != null)
            showLevel_display.onClick.AddListener(instantiateShowLevel);
        if (email_display != null)
            email_display.onClick.AddListener(instantiateEmail);
        if (notice_display != null)
            notice_display.onClick.AddListener(instantiateNotice);

        EnsureMusicPicRoot();
        SetupMusicPicDefault();
        if (button_Music != null)
            button_Music.onClick.AddListener(ToggleMusicPicLocal);

        var binder = BgmUiBinder.Instance != null ? BgmUiBinder.Instance : Object.FindAnyObjectByType<BgmUiBinder>();
        if (binder != null && musicPicRoot != null)
        {
            binder.SetMusicRoot(musicPicRoot);
        }

        // Pre-instantiate settings prefab and keep it inactive, ensuring only one exists
        if (settings_prefab != null && putPrefabsHere != null)
        {
            // Try to find existing one in scene first
            if (settingsInstance == null)
            {
                var existing = GameObject.Find(settings_prefab.name + "(Clone)");
                if (existing != null)
                {
                    settingsInstance = existing;
                }
            }

            if (settingsInstance == null)
            {
                settingsInstance = Instantiate(settings_prefab, putPrefabsHere.transform);
                settingsInstance.SetActive(false);

                // try to set canvas camera now as in previous behavior
                try
                {
                    Canvas c = settingsInstance.GetComponentInChildren<Canvas>(true);
                    if (c != null)
                    {
                        Camera[] cams = Object.FindObjectsByType<Camera>(FindObjectsInactive.Exclude, FindObjectsSortMode.None);
                        if (cams != null && cams.Length > 0)
                        {
                            c.worldCamera = cams[0];
                        }
                        cams = null;
                        c = null;
                    }
                }
                catch { }
            }
            else
            {
                // ensure it's parented correctly under putPrefabsHere
                settingsInstance.transform.SetParent(putPrefabsHere.transform, false);
                settingsInstance.SetActive(false);
            }
        }
    }


    private void FixedUpdate()
    {
        if(Input.GetKeyDown(KeyCode.Escape))
        {
            //ToggleSettingsPrefab();
        }
    }



    private void ToggleMusicPic()
    {
        var binder = BgmUiBinder.Instance != null ? BgmUiBinder.Instance : Object.FindAnyObjectByType<BgmUiBinder>();
        if (binder != null)
        {
            binder.ToggleMusicPic();
            var spectrum = binder.GetSpectrumRoot();
            if (spectrum != null && binder.transform != null)
            {
                spectrum.localRotation = binder.transform.localRotation;
            }
        }
    }

    private void EnsureMusicPicRoot()
    {
        if (musicPicRoot != null)
            return;
        var child = transform.Find("MusicPic");
        if (child != null)
        {
            musicPicRoot = child as RectTransform;
            return;
        }
        var sceneMusic = GameObject.Find("MusicPic");
        if (sceneMusic != null)
        {
            musicPicRoot = sceneMusic.GetComponent<RectTransform>();
        if (musicPicRoot != null)
        {
            musicPicRoot.SetParent(transform, false);
        }
    }
    }

    private void SetupMusicPicDefault()
    {
        if (musicPicRoot == null)
            return;
        EnsureMusicPicGroup();
        SetMusicPicVisible(false, true);
    }

    private void EnsureMusicPicGroup()
    {
        if (musicPicRoot == null)
            return;
        if (musicPicGroup == null)
            musicPicGroup = musicPicRoot.GetComponent<CanvasGroup>();
        if (musicPicGroup == null)
            musicPicGroup = musicPicRoot.gameObject.AddComponent<CanvasGroup>();
    }

    private void ToggleMusicPicLocal()
    {
        EnsureMusicPicRoot();
        var binder = BgmUiBinder.Instance != null ? BgmUiBinder.Instance : Object.FindAnyObjectByType<BgmUiBinder>();
        if (musicPicRoot == null)
        {
            if (binder != null)
                binder.ToggleMusicPic();
            return;
        }

        SetMusicPicVisible(!musicPicVisible, false);
    }

    private void SetMusicPicVisible(bool visible, bool instant)
    {
        if (musicPicRoot == null)
            return;
        EnsureMusicPicGroup();
        musicPicVisible = visible;

        if (musicPicFade != null)
        {
            StopCoroutine(musicPicFade);
            musicPicFade = null;
        }

        if (instant)
        {
            musicPicGroup.alpha = visible ? 1f : 0f;
            musicPicGroup.interactable = visible;
            musicPicGroup.blocksRaycasts = visible;
            musicPicRoot.gameObject.SetActive(visible);
            return;
        }

        musicPicRoot.gameObject.SetActive(true);
        musicPicFade = StartCoroutine(FadeMusicPic(visible));
    }

    private System.Collections.IEnumerator FadeMusicPic(bool visibleAtEnd)
    {
        EnsureMusicPicGroup();
        if (musicPicGroup == null)
            yield break;
        float start = musicPicGroup != null ? musicPicGroup.alpha : 0f;
        float target = visibleAtEnd ? 1f : 0f;
        float t = 0f;
        while (t < 1f)
        {
            if (musicPicGroup == null || musicPicRoot == null)
                yield break;
            t += Time.unscaledDeltaTime / Mathf.Max(0.0001f, musicPicFadeTime);
            float eased = Mathf.SmoothStep(0f, 1f, t);
            musicPicGroup.alpha = Mathf.LerpUnclamped(start, target, eased);
            yield return null;
        }
        if (musicPicGroup != null)
        {
            musicPicGroup.alpha = target;
            musicPicGroup.interactable = visibleAtEnd;
            musicPicGroup.blocksRaycasts = visibleAtEnd;
        }
        if (!visibleAtEnd && musicPicRoot != null)
        {
            musicPicRoot.gameObject.SetActive(false);
        }
    }

    GameObject FindByName(string name)
    {
        var all = Resources.FindObjectsOfTypeAll<Transform>();
        for (int i = 0; i < all.Length; i++)
        {
            var t = all[i];
            if (t == null) continue;
            if (!t.gameObject.scene.IsValid() || !t.gameObject.scene.isLoaded) continue;
            if (t.name == name) return t.gameObject;
        }
        return null;
    }

    void OnDestroy()
    {
        if (musicPicFade != null)
        {
            StopCoroutine(musicPicFade);
            musicPicFade = null;
        }
        musicPicGroup = null;
        if (settings_launch != null)
            settings_launch.onClick.RemoveListener(instantiateSettings);
        if (userInfo_launch != null)
            userInfo_launch.onClick.RemoveListener(instantiateUserInfo);
        if (store_launch != null)
            store_launch.onClick.RemoveListener(instantiateStore);
        if (showLevel_display != null)
            showLevel_display.onClick.RemoveListener(instantiateShowLevel);
        if (email_display != null)
            email_display.onClick.RemoveListener(instantiateEmail);
        if (notice_display != null)
            notice_display.onClick.RemoveListener(instantiateNotice);

        if (button_Music != null)
            button_Music.onClick.RemoveListener(ToggleMusicPicLocal);
    }

    private void ToggleSettingsPrefab()
    {
        if (settings_prefab == null || putPrefabsHere == null) return;

        // If we don't have an instance (it may have been destroyed), instantiate one
        if (settingsInstance == null)
        {
            settingsInstance = Instantiate(settings_prefab, putPrefabsHere.transform);

            // attempt to set canvas camera
            try
            {
                Canvas c = settingsInstance.GetComponentInChildren<Canvas>(true);
                if (c != null)
                {
                    Camera[] cams = Object.FindObjectsByType<Camera>(FindObjectsInactive.Exclude, FindObjectsSortMode.None);
                    if (cams != null && cams.Length > 0)
                    {
                        c.worldCamera = cams[0];
                    }
                    cams = null;
                    c = null;
                }
            }
            catch { }

            settingsInstance.SetActive(true);
            return;
        }

        // Toggle active state
        bool active = settingsInstance.activeSelf;
        settingsInstance.SetActive(!active);
    }

    private void ShowLevelPrefab()
    {
        ShowPrefab(showLevel_prefab, ref showLevelInstance);
        CloseInfoPanels(showLevelInstance);
    }

    private void ShowEmailPrefab()
    {
        ShowPrefab(email_prefab, ref emailInstance);
        CloseInfoPanels(emailInstance);
    }

    private void ShowNoticePrefab()
    {
        ShowPrefab(notice_prefab, ref noticeInstance);
        CloseInfoPanels(noticeInstance);
    }

    private void ShowPrefab(GameObject prefab, ref GameObject instance)
    {
        if (prefab == null || putPrefabsHere == null) return;

        if (instance == null)
        {
            instance = FindExistingInstance(prefab);
            if (instance == null)
            {
                instance = Instantiate(prefab, putPrefabsHere.transform);
                TryAssignCanvasCamera(instance);
            }
            else
            {
                instance.transform.SetParent(putPrefabsHere.transform, false);
            }
        }

        instance.SetActive(true);
        instance.transform.SetAsLastSibling();
    }

    private void CloseInfoPanels(GameObject keep)
    {
        CloseInstance(ref showLevelInstance, keep);
        CloseInstance(ref emailInstance, keep);
        CloseInstance(ref noticeInstance, keep);
    }

    private void CloseInstance(ref GameObject instance, GameObject keep)
    {
        if (instance == null || instance == keep) return;
        instance.SetActive(false);
    }

    private GameObject FindExistingInstance(GameObject prefab)
    {
        if (prefab == null || putPrefabsHere == null) return null;

        Transform parent = putPrefabsHere.transform;
        for (int i = 0; i < parent.childCount; i++)
        {
            Transform child = parent.GetChild(i);
            if (child == null) continue;
            if (child.name == prefab.name || child.name == prefab.name + "(Clone)")
            {
                return child.gameObject;
            }
        }

        GameObject existing = GameObject.Find(prefab.name + "(Clone)");
        return existing;
    }

    private void TryAssignCanvasCamera(GameObject instance)
    {
        if (instance == null) return;

        try
        {
            Canvas c = instance.GetComponentInChildren<Canvas>(true);
            if (c != null)
            {
                Camera[] cams = Object.FindObjectsByType<Camera>(FindObjectsInactive.Exclude, FindObjectsSortMode.None);
                if (cams != null && cams.Length > 0)
                {
                    c.worldCamera = cams[0];
                }
            }
        }
        catch { }
    }

    private void InstantiatePrefab(GameObject prefab)
    {
        if (prefab != null && putPrefabsHere != null)
        {
            GameObject instance = Instantiate(prefab, putPrefabsHere.transform);
            instance = null;
        }
    }
}