using UnityEngine;
using UnityEngine.UIElements;
using UnityEngine.SceneManagement;

using System.IO;

public class MenuUI : MonoBehaviour {
    UIDocument uiDocument;
    VisualElement tracks;

    Button exit;

    bool HideExitButton => Application.platform == RuntimePlatform.XboxOne || Application.isEditor;

    void OnEnable() {
        uiDocument = GetComponent<UIDocument>();
    }

    public void FocusTracks() {
        uiDocument.rootVisualElement.Q<Button>().Focus();
    }

    public void AddTracks() {
        SetupExit();

        Scene current = SceneManager.GetActiveScene();

        tracks = uiDocument.rootVisualElement.Q<VisualElement>("tracks");
        tracks.Clear();

        for (int i = 0; i < SceneManager.sceneCountInBuildSettings; ++i) {
            int j = i; // top kek some pass by value thing ask liam
            Scene scene = SceneManager.GetSceneByBuildIndex(i);
            if (scene.name == current.name) continue;
            string scenePath = SceneUtility.GetScenePathByBuildIndex(i);
            string sceneName = Path.GetFileNameWithoutExtension(scenePath);
            Button button = new Button { text = sceneName };
            button.clicked += () => LoadScene(j);
            tracks.Add(button);
        }
    }

    void LoadScene(int i) {
        Debug.Log($"Loading scene {i}");
        SceneManager.LoadScene(i);
    }

    void SetupExit() {
        exit = uiDocument.rootVisualElement.Q<Button>("exit");

        if (HideExitButton) {
            exit.style.display = DisplayStyle.None;
            return;
        }

        exit.clicked += Exit;
    }

    void Exit() {
        Debug.Log("Quitting");
        Application.Quit();
    }

}