using System;
using DG.Tweening;
using UnityEngine;
using UnityEngine.UI;

namespace AppUI.Util.Switch
{
    [RequireComponent(typeof(Button))]
    public class UISwitchToggle : MonoBehaviour
    {
        [Header("UI")]
        [SerializeField] Image background;

        [SerializeField] RectTransform knob;

        [Header("Color")]
        [SerializeField]
        Color onColor =
            new Color(0.3f, 0.85f, 0.4f);

        [SerializeField]
        Color offColor =
            new Color(0.7f, 0.7f, 0.7f);

        [Header("Move")]
        [SerializeField] float knobOnX = 30f;

        [SerializeField] float knobOffX = -30f;

        [SerializeField] float duration = 0.2f;

        bool isOn;

        Action<bool> onValueChanged;

        Button btn;

        void Awake()
        {
            btn = GetComponent<Button>();

            btn.onClick.RemoveListener(OnClick);
            btn.onClick.AddListener(OnClick);
        }

        public void Init(
            bool defaultValue,
            Action<bool> callback)
        {
            isOn = defaultValue;

            onValueChanged = callback;

            Refresh(false);
        }

        void OnClick()
        {
            AudioMgr.ins.PlayBtn();

            isOn = !isOn;

            Refresh(true);

            onValueChanged?.Invoke(isOn);
        }

        public void SetValue(bool value)
        {
            isOn = value;

            Refresh(false);
        }

        public bool GetValue()
        {
            return isOn;
        }

        void Refresh(bool animate)
        {
            // background
            background.color =
                isOn
                ? onColor
                : offColor;

            // knob position
            //knob.GetComponent<Image>().color =
            //  isOn
            //  ? offColor
            //  : onColor;
            float targetX =
                isOn
                ? knobOnX
                : knobOffX;

            if (animate)
            {
                knob.DOAnchorPosX(targetX, duration)
                    .SetEase(Ease.OutCubic);
            }
            else
            {
                Vector2 pos = knob.anchoredPosition;
                pos.x = targetX;
                knob.anchoredPosition = pos;
            }
        }
    }
}