using UnityEngine;
using TMPro;

public class runningTime : MonoBehaviour
{
    public TextMeshProUGUI allRunningTime;
    public AudioSource bgMusicAudioSource; // optional: can be assigned in inspector

    // progressLine/zhuangshi (1): Scale.x is driven by playedTime/totalLength (0..1)
    private Transform progressLineDecor;
    private Vector3 progressLineDecorBaseScale;
    private bool progressLineDecorBaseScaleCached;

    private GameManager gm;

    void Start()
    {
        gm = SceneObjectLookupCache.FindAny<GameManager>();
        if (bgMusicAudioSource == null && gm != null)
        {
            bgMusicAudioSource = gm.musicSource;
        }

        // Cache progress bar transform (optional)
        try
        {
            var go = SceneObjectLookupCache.Find("progressLine/zhuangshi (1)");
            if (go != null) progressLineDecor = go.transform;
            if (progressLineDecor != null)
            {
                progressLineDecorBaseScale = progressLineDecor.localScale;
                progressLineDecorBaseScaleCached = true;
            }
        }
        catch { }

        // ensure UI shows zero initially
        if (allRunningTime != null) allRunningTime.text = "00:00";
        UpdateProgressBar(0f);
    }

    void Update()
    {
        // Display played time after the game manager indicates playback actually started.
        // Do not require isPlaying so pause will keep the last value instead of resetting.
        if (gm != null && gm.PlaybackStarted && bgMusicAudioSource != null && bgMusicAudioSource.clip != null)
        {
            float played = Mathf.Max(0f, bgMusicAudioSource.time);
            float total = Mathf.Max(0.0001f, bgMusicAudioSource.clip.length);

            if (allRunningTime != null)
                allRunningTime.text = FormatMMSS(played);

            UpdateProgressBar(played / total);
            return;
        }

        {
            if (allRunningTime != null) allRunningTime.text = "00:00";
            UpdateProgressBar(0f);
        }
    }

    private void UpdateProgressBar(float ratio01)
    {
        if (progressLineDecor == null)
        {
            try
            {
                var go = SceneObjectLookupCache.Find("progressLine/zhuangshi (1)");
                if (go != null) progressLineDecor = go.transform;
            }
            catch { }
        }
        if (progressLineDecor == null) return;
        if (!progressLineDecorBaseScaleCached)
        {
            progressLineDecorBaseScale = progressLineDecor.localScale;
            progressLineDecorBaseScaleCached = true;
        }

        float r = Mathf.Clamp01(ratio01);
        var s = progressLineDecorBaseScale;
        s.x = r;
        progressLineDecor.localScale = s;
    }

    private static string FormatMMSS(float seconds)
    {
        if (seconds < 0f) seconds = 0f;
        int total = Mathf.FloorToInt(seconds);
        int mins = total / 60;
        int secs = total % 60;
        return mins.ToString("00") + ":" + secs.ToString("00");
    }
}