using UnityEngine;
using UnityEngine.UI;
using System;
using System.Collections;
using TMPro;

namespace Game
{
    public class LoadingProgressBar : MonoBehaviour
    {
        public Image BarRecTrans;
        public TMP_Text ProgressLabel;

        public Action OnComplete;
        public Action OnBarFull;

        public float progress { get; private set; }

        bool _isInited;

        void Start()
        {
            _isInited = true;
            BarRecTrans.fillAmount = progress;
        }

        public void SetProgressValue(float value, float tween_sec)
        {
            value = Mathf.Clamp01(value);

            if (!Mathf.Approximately(progress, value))
            {
                if (tween_sec > Mathf.Epsilon)
                {
                    StopAllCoroutines();

                    if (gameObject.activeInHierarchy)
                    {
                        StartCoroutine(TweenProgressValue(value, tween_sec));
                    }
                }
                else
                {
                    StopAllCoroutines();
                    SetProgressValue(value);
                }
            }
            else
            {
                //GameDebug.Log($"[SlotLoadingProgressBar]SetProgressValue: Same progress value {progress}, just call it done");
                SetProgressDone();
            }
        }

        IEnumerator TweenProgressValue(float value, float tween_sec)
        {
            //GameDebug.LogError("Start tween progress: target {0}, sec {1}", value, tween_sec);
            var tween_target = Mathf.Clamp01(value);
            float start_value = progress;
            float start_time = Time.realtimeSinceStartup;
            float end_time = Time.realtimeSinceStartup + tween_sec;
            yield return null;

            while (Time.realtimeSinceStartup < end_time)
            {
                float t = (Time.realtimeSinceStartup - start_time) / tween_sec;
                float current_value = Mathf.Lerp(start_value, tween_target, t);
                //GameDebug.LogError("-==current_value: {0}", current_value);
                SetProgressValue(current_value);
                yield return new WaitForEndOfFrame();
            }

            SetProgressValue(tween_target);
            SetProgressDone();
        }

        public void SetProgressValue(float value)
        {
            value = Mathf.Clamp01(value);

            if (_isInited)
            {
                BarRecTrans.fillAmount = value;
            }

            if (ProgressLabel != null)
            {
                var percent_text = (int)(value * 100f);
                    ProgressLabel.text = $"{percent_text}%";
            }

            progress = value;
            //GameDebug.LogError($"-==SetProgressValue: {progress}");
        }

        public void SetProgressValue(float value, string text)
        {
            value = Mathf.Clamp01(value);

            if (_isInited)
            {
                BarRecTrans.fillAmount = value;
            }

            if (ProgressLabel != null)
            {
                var percent_text = (int)(value * 100f);
                ProgressLabel.text = $"[{text}] {percent_text}%";
            }

            progress = value;
        }

        void SetProgressDone()
        {
            //GameDebug.Log("[SlotLoadingProgressBar]SetProgressDone");

            if (OnComplete != null)
            {
                OnComplete.Invoke();
                OnComplete = null;
            }

            if (Mathf.Approximately(progress, 1))
            {
                if (OnBarFull != null)
                {
                    OnBarFull.Invoke();
                    OnBarFull = null;
                }
            }

            StopAllCoroutines();
        }
    }
}