using UnityEngine;

// หน้าตั้งค่าที่ใช้ร่วมกันระหว่างล็อบบี้และสนามรบ; ไม่หยุดเวลาเกมออนไลน์
// ถ้าใน Scene มีต้นแบบ BattleSettingsTemplate (สร้างด้วยเมนู Editable) จะคัดลอกต้นแบบนั้นมาใช้
// หน้าตาจึงเป็นตามที่จัดในหน้า Edit; ถ้าไม่มีต้นแบบ จะสร้างด้วยโค้ดแบบเดิม
public class BattleSettingsPanel : MonoBehaviour
{
    public const string TemplateName = "BattleSettingsTemplate";
    private static BattleSettingsPanel current;
    public static bool IsOpen => current != null;
    public static float AimSensitivity => Mathf.Clamp(PlayerPrefs.GetFloat("AimSensitivity", .7f), .25f, 1.5f);
    private System.Action leave;
    private System.Action logout;
    private GameObject logoutConfirmation;
    private GameObject authoredLogoutConfirmation;
    private RectTransform panel;
    private GameObject confirmation;
    private GameObject authoredConfirmation;

    // onLeave = ปุ่ม LEAVE MATCH (ในสนามรบ), onLogout = ปุ่ม LOG OUT (ในล็อบบี้)
    public static void Show(System.Action onLeave = null, System.Action onLogout = null)
    {
        if (current != null) return;
        var template = FindTemplate();
        if (template != null)
        {
            var copy = EditableTemplate.Spawn(template, null);
            copy.name = "BattleSettings";
            current = copy.AddComponent<BattleSettingsPanel>();
            current.leave = onLeave;
            current.logout = onLogout;
            if (current.BindAuthored()) return;
            Debug.LogWarning("BattleSettingsTemplate is missing SettingsPanel; using the code-built settings panel.", template);
            current = null;
            Destroy(copy);
        }
        var root = CreateRoot("BattleSettings");
        current = root.AddComponent<BattleSettingsPanel>();
        current.leave = onLeave;
        current.logout = onLogout;
        current.Build();
    }

    private static GameObject CreateRoot(string name)
    {
        var root = new GameObject(name, typeof(Canvas), typeof(UnityEngine.UI.CanvasScaler), typeof(UnityEngine.UI.GraphicRaycaster));
        var canvas = root.GetComponent<Canvas>();
        canvas.renderMode = RenderMode.ScreenSpaceOverlay;
        canvas.sortingOrder = 200;
        var scaler = root.GetComponent<UnityEngine.UI.CanvasScaler>();
        scaler.uiScaleMode = UnityEngine.UI.CanvasScaler.ScaleMode.ScaleWithScreenSize;
        scaler.referenceResolution = new Vector2(1280,720);
        scaler.matchWidthOrHeight = .5f;
        return root;
    }

    private static GameObject FindTemplate()
    {
        foreach (var root in UnityEngine.SceneManagement.SceneManager.GetActiveScene().GetRootGameObjects())
            if (root.name == TemplateName) return root;
        return null;
    }

    private RectTransform Rect(string name, Transform parent, float x,float y,float w,float h)
    {
        var item = new GameObject(name,typeof(RectTransform));
        var rect = item.GetComponent<RectTransform>(); rect.SetParent(parent,false);
        rect.sizeDelta = new Vector2(w,h); rect.anchoredPosition = new Vector2(x,y); return rect;
    }
    // ชื่อวัตถุไม่ซ้ำกัน เพื่อให้ต้นแบบใน Scene หาเจอได้ (หน้าตา/การทำงานเหมือนเดิม)
    private TMPro.TextMeshProUGUI Text(Transform parent,string value,float x,float y,float w=500,string name="Label")
    {
        var text=Rect(name,parent,x,y,w,44).gameObject.AddComponent<TMPro.TextMeshProUGUI>();
        text.text=value; text.fontSize=23; text.alignment=TMPro.TextAlignmentOptions.Center;
        text.raycastTarget=false; return text;
    }
    private void Button(Transform parent,string value,float x,float y,System.Action action)
    {
        var rect=Rect(value,parent,x,y,220,48);
        rect.gameObject.AddComponent<UnityEngine.UI.Image>().color=new Color(.08f,.25f,.34f);
        rect.gameObject.AddComponent<UnityEngine.UI.Button>().onClick.AddListener(()=>action());
        Text(rect,value,0,0,210);
    }
    private void Row(string title,string key,float defaultValue,float min,float max,float y,System.Action<float> changed)
    {
        var label=Text(panel,title,-155,y,230,title+" Label");
        var track=Rect(title,panel,125,y,260,16);
        track.gameObject.AddComponent<UnityEngine.UI.Image>().color=new Color(.15f,.24f,.32f);
        var slider=track.gameObject.AddComponent<UnityEngine.UI.Slider>();
        var handle=Rect("Handle",track,0,0,26,34);
        var image=handle.gameObject.AddComponent<UnityEngine.UI.Image>(); image.color=new Color(.3f,.85f,1);
        slider.handleRect=handle; slider.targetGraphic=image; slider.minValue=min; slider.maxValue=max;
        HookSlider(slider,label,title,key,defaultValue,min,max,changed);
    }
    private static void HookSlider(UnityEngine.UI.Slider slider,TMPro.TMP_Text label,string title,string key,float defaultValue,float min,float max,System.Action<float> changed)
    {
        float value=Mathf.Clamp(PlayerPrefs.GetFloat(key,defaultValue),min,max);
        slider.SetValueWithoutNotify(value);
        if(label != null) label.text=title+"  "+Mathf.RoundToInt(value*100)+"%";
        slider.onValueChanged.AddListener(v=>{ PlayerPrefs.SetFloat(key,v); changed?.Invoke(v); if(label != null) label.text=title+"  "+Mathf.RoundToInt(v*100)+"%"; });
    }
    private void Build()
    {
        var shade=Rect("ModalShade",transform,0,0,0,0);
        shade.anchorMin=Vector2.zero; shade.anchorMax=Vector2.one; shade.offsetMin=shade.offsetMax=Vector2.zero;
        shade.gameObject.AddComponent<UnityEngine.UI.Image>().color=new Color(0,0,0,.8f);
        panel=Rect("SettingsPanel",transform,0,0,640,560);
        panel.gameObject.AddComponent<UnityEngine.UI.Image>().color=new Color(.035f,.065f,.12f);
        Text(panel,"SETTINGS",0,225,500,"Title");
        Row("MASTER","MasterVolume",1,0,1,140,v=>AudioManager.Instance?.SetMasterVolume(v));
        Row("MUSIC","MusicVolume",.65f,0,1,75,v=>AudioManager.Instance?.SetMusicVolume(v));
        Row("EFFECTS","SFXVolume",.8f,0,1,10,v=>AudioManager.Instance?.SetSFXVolume(v));
        Row("AIM SPEED","AimSensitivity",.7f,.25f,1.5f,-55,null);
        Text(panel,MessageFor(leave),0,-120,600,"Message").fontSize=18;
        Button(panel,"BACK",leave == null && logout == null ? 0 : -125,-205,Close);
        if(leave != null) Button(panel,"LEAVE MATCH",125,-205,Confirm);
        else if(logout != null) Button(panel,"LOG OUT",125,-205,ConfirmLogout);
    }
    private bool ShowsLogout => leave == null && logout != null;
    private static string MessageFor(System.Action leave) =>
        leave == null ? "Settings are saved on this device." : "Online match continues while this menu is open.";

    // ผูกปุ่ม/สไลเดอร์ของต้นแบบที่คัดลอกมา (ไม่เปลี่ยนตำแหน่ง/สีที่จัดไว้)
    private bool BindAuthored()
    {
        panel = transform.Find("SettingsPanel") as RectTransform;
        if (panel == null) return false;
        BindRow("MASTER","MasterVolume",1,0,1,v=>AudioManager.Instance?.SetMasterVolume(v));
        BindRow("MUSIC","MusicVolume",.65f,0,1,v=>AudioManager.Instance?.SetMusicVolume(v));
        BindRow("EFFECTS","SFXVolume",.8f,0,1,v=>AudioManager.Instance?.SetSFXVolume(v));
        BindRow("AIM SPEED","AimSensitivity",.7f,.25f,1.5f,null);
        var message = FindText(panel,"Message");
        if(message != null) message.text = MessageFor(leave);
        BindButton(panel,"BACK",Close);
        var leaveButton = panel.Find("LEAVE MATCH");
        if(leaveButton != null)
        {
            leaveButton.gameObject.SetActive(leave != null);
            if(leave != null) BindButton(panel,"LEAVE MATCH",Confirm);
        }
        var logoutButton = panel.Find("LOG OUT");
        if(logoutButton == null && ShowsLogout)
        {
            // ต้นแบบเก่าที่ยังไม่มีปุ่ม LOG OUT: เพิ่มให้ และเลื่อน BACK ไปซ้ายไม่ให้ทับกัน
            var back = panel.Find("BACK") as RectTransform;
            if(back != null && Mathf.Abs(back.anchoredPosition.x) < 1f) back.anchoredPosition = new Vector2(-125, back.anchoredPosition.y);
            Button(panel,"LOG OUT",125,-205,ConfirmLogout);
        }
        else if(logoutButton != null)
        {
            logoutButton.gameObject.SetActive(ShowsLogout);
            if(ShowsLogout) BindButton(panel,"LOG OUT",ConfirmLogout);
        }
        var confirmLogout = panel.Find("ConfirmLogout");
        if(confirmLogout != null)
        {
            authoredLogoutConfirmation = confirmLogout.gameObject;
            authoredLogoutConfirmation.SetActive(false);
            BindButton(confirmLogout,"CANCEL",()=>authoredLogoutConfirmation.SetActive(false));
            BindButton(confirmLogout,"LOG OUT",()=>{var action=logout; Close(); action?.Invoke();});
        }
        var confirm = panel.Find("ConfirmLeave");
        if(confirm != null)
        {
            authoredConfirmation = confirm.gameObject;
            authoredConfirmation.SetActive(false);
            BindButton(confirm,"CANCEL",()=>authoredConfirmation.SetActive(false));
            BindButton(confirm,"LEAVE",()=>{var action=leave; Close(); action?.Invoke();});
        }
        return true;
    }
    private void BindRow(string title,string key,float defaultValue,float min,float max,System.Action<float> changed)
    {
        var track = panel.Find(title);
        var slider = track != null ? track.GetComponent<UnityEngine.UI.Slider>() : null;
        if(slider == null) return;
        // ช่วงค่าเป็นกติกาเกม จึงตั้งจากโค้ดเสมอ
        slider.minValue=min; slider.maxValue=max;
        HookSlider(slider,FindText(panel,title+" Label"),title,key,defaultValue,min,max,changed);
    }
    private static TMPro.TMP_Text FindText(Transform parent,string name)
    {
        var item = parent.Find(name);
        return item != null ? item.GetComponent<TMPro.TMP_Text>() : null;
    }
    private static void BindButton(Transform parent,string name,System.Action action)
    {
        var item = parent.Find(name);
        var button = item != null ? item.GetComponent<UnityEngine.UI.Button>() : null;
        if(button != null) button.onClick.AddListener(()=>action());
    }
    private void Confirm()
    {
        if(authoredConfirmation != null) { authoredConfirmation.SetActive(true); return; }
        if(confirmation != null) return;
        var rect=Rect("ConfirmLeave",panel,0,0,640,560); confirmation=rect.gameObject;
        confirmation.AddComponent<UnityEngine.UI.Image>().color=new Color(.035f,.065f,.12f);
        Text(rect,"LEAVE THIS MATCH?",0,95,500,"Title");
        Text(rect,"The current match will end for both players.",0,25,610,"Message").fontSize=20;
        Button(rect,"CANCEL",-125,-95,()=>Destroy(confirmation));
        Button(rect,"LEAVE",125,-95,()=>{var action=leave; Close(); action?.Invoke();});
    }
    private void ConfirmLogout()
    {
        if(authoredLogoutConfirmation != null) { authoredLogoutConfirmation.SetActive(true); return; }
        if(logoutConfirmation != null) return;
        var rect=Rect("ConfirmLogout",panel,0,0,640,560); logoutConfirmation=rect.gameObject;
        logoutConfirmation.AddComponent<UnityEngine.UI.Image>().color=new Color(.035f,.065f,.12f);
        Text(rect,"LOG OUT?",0,95,500,"Title");
        Text(rect,"You will return to the login screen.",0,25,610,"Message").fontSize=20;
        Button(rect,"CANCEL",-125,-95,()=>Destroy(logoutConfirmation));
        Button(rect,"LOG OUT",125,-95,()=>{var action=logout; Close(); action?.Invoke();});
    }
    private void Close() { PlayerPrefs.Save(); Destroy(gameObject); }
    void OnDestroy() { if(current==this) current=null; }

#if UNITY_EDITOR
    // ใช้จากเมนู Editable บน GameplayManager / LobbyManager: สร้างต้นแบบหน้าตั้งค่าไว้ใน Scene ให้แก้ได้
    public static void BuildEditableTemplate(bool inBattle)
    {
        if (Application.isPlaying) return;
        if (FindTemplate() != null) { Debug.LogWarning(TemplateName + " already exists in this scene."); return; }
        var root = CreateRoot(TemplateName);
        UnityEditor.Undo.RegisterCreatedObjectUndo(root, "Build Settings Template");
        var builder = root.AddComponent<BattleSettingsPanel>();
        builder.leave = inBattle ? () => { } : (System.Action)null;
        builder.logout = inBattle ? (System.Action)null : () => { };
        builder.Build();
        if (inBattle)
        {
            builder.Confirm();
            if (builder.confirmation != null) builder.confirmation.SetActive(false);
        }
        else
        {
            builder.ConfirmLogout();
            if (builder.logoutConfirmation != null) builder.logoutConfirmation.SetActive(false);
        }
        DestroyImmediate(builder);
        root.AddComponent<EditableTemplate>();
        root.SetActive(false);
        UnityEditor.Selection.activeGameObject = root;
        UnityEditor.SceneManagement.EditorSceneManager.MarkSceneDirty(root.scene);
        Debug.Log(TemplateName + " created. Tick it on to edit, the game hides it automatically when you press Play.", root);
    }
#endif
}