using System.Collections;
using UnityEngine;
using UnityEngine.SceneManagement;
using UnityEngine.UI;

public class BootLoader : MonoBehaviour
{
    [Header("Settings")]
    [Tooltip("The name of the main scene to load asynchronously.")]
    [SerializeField] private string mainSceneName = "Main_main";

    [Tooltip("Minimum time to show the splash screen (in seconds).")]
    [SerializeField] private float minSplashTime = 2.0f;

    [Header("UI References")]
    [Tooltip("Optional Slider to show loading progress.")]
    [SerializeField] private Slider progressSlider;

    [Tooltip("Optional Text to show loading percentage.")]
    [SerializeField] private Text progressText;

    private void Start()
    {
        // Start the asynchronous loading process
        StartCoroutine(LoadMainSceneAsync());
    }

    private IEnumerator LoadMainSceneAsync()
    {
        // Prevent the screen from sleeping during loading
        Screen.sleepTimeout = SleepTimeout.NeverSleep;

        float startTime = Time.time;

        // Start loading the scene asynchronously
        AsyncOperation asyncLoad = SceneManager.LoadSceneAsync(mainSceneName);

        // Prevent the scene from activating immediately
        asyncLoad.allowSceneActivation = false;

        while (!asyncLoad.isDone)
        {
            // Calculate progress (0.0 to 0.9)
            float progress = Mathf.Clamp01(asyncLoad.progress / 0.9f);

            // Update UI if references are assigned
            if (progressSlider != null)
            {
                progressSlider.value = progress;
            }

            if (progressText != null)
            {
                progressText.text = $"{(progress * 100):0}%";
            }

            // Check if loading is complete (progress >= 0.9) and minimum time has passed
            if (asyncLoad.progress >= 0.9f)
            {
                // Wait for the minimum splash time
                float elapsedTime = Time.time - startTime;
                if (elapsedTime >= minSplashTime)
                {
                    // Allow the scene to activate
                    asyncLoad.allowSceneActivation = true;
                }
            }

            yield return null;
        }

        // Restore screen sleep timeout
        Screen.sleepTimeout = SleepTimeout.SystemSetting;
    }
}