using UnityEngine;
using TMPro;
using DG.Tweening;

namespace Ashwild.UI
{
    /// <summary>
    /// A single line in the player presence feed (e.g. "Alex a rejoint la partie"). Fades itself in,
    /// holds, fades out, then self-destructs — the parent holder's layout group handles stacking, so
    /// this only ever animates its own alpha and never fights the layout for position.
    /// </summary>
    [DisallowMultipleComponent]
    [RequireComponent(typeof(CanvasGroup))]
    public class PresenceFeedEntry : MonoBehaviour
    {
        #region Serialized Fields

        [Header("References")]
        [Tooltip("The label that shows the join/leave message.")]
        [SerializeField] private TMP_Text label;

        [Tooltip("Faded in and out over the entry's lifetime. Auto-fetched from this object if left empty.")]
        [SerializeField] private CanvasGroup canvasGroup;

        #endregion

        #region State

        /// <summary>
        /// The full lifecycle tween (fade in → hold → fade out → destroy), killed on teardown.
        /// </summary>
        private Sequence lifecycle;

        #endregion

        #region Unity Lifecycle

        /// <summary>
        /// Caches the CanvasGroup when it wasn't wired in the inspector.
        /// </summary>
        private void Awake()
        {
            if (canvasGroup == null) canvasGroup = GetComponent<CanvasGroup>();
        }

        /// <summary>
        /// Kills the lifecycle tween so it never targets a destroyed object.
        /// </summary>
        private void OnDestroy()
        {
            lifecycle?.Kill();
        }

        #endregion

        #region Public API

        /// <summary>
        /// Fills in the message and colour, then runs the fade-in → hold → fade-out → destroy sequence.
        /// Safe to call once right after instantiation.
        /// </summary>
        public void Play(string message, Color color, float holdDuration, float fadeInDuration, float fadeOutDuration)
        {
            if (label != null)
            {
                label.text = message;
                label.color = color;
            }

            canvasGroup.alpha = 0f;

            lifecycle = DOTween.Sequence();
            lifecycle.Append(canvasGroup.DOFade(1f, fadeInDuration).SetEase(Ease.OutQuad));
            lifecycle.AppendInterval(holdDuration);
            lifecycle.Append(canvasGroup.DOFade(0f, fadeOutDuration).SetEase(Ease.InQuad));
            lifecycle.OnComplete(() => Destroy(gameObject));
        }

        #endregion
    }
}