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

namespace Improved_Health_Bars.Scripts
{
    public class ManaScript : MonoBehaviour
    {
        public Image manabar; // sets ManaBar Image
        public Image damagebar; // sets DamageBar Image
        public Image blockbar; // sets BlockBar Image
        public Text manaCountTxt; // sets mana amount if defined
        public float barCapacity = 1; // sets manas visible area between 0.1f-1f
        public float maxMana = 100; // sets maximum mana as number
        public float currentMana = 100; // sets current mana as number
        public int naturalManaRate = 10; //sets natural mana recovery mana rate
        public float naturalManaInterval = 4f; // sets natural mara recovery trigger second
        public bool triggerNaturalMana = false; // sets enabling natural mana recovery
        private float barFilled = 1;
        private IEnumerator setImagesCoroutine;
        private IEnumerator naturalManaCoroutine;


        void Start()
        {
            currentMana = maxMana;
            if (barCapacity < 0.1f)
            {
                barCapacity = 0.1f;
                Debug.LogWarning("Barfilled must be between 0.1 and 1");
            }

            if (blockbar)
            {
                blockbar.fillAmount = 1 - barCapacity;
            }

            manabar.fillAmount = barCapacity;
            damagebar.fillAmount = barCapacity;
            if (manaCountTxt)
            {
                manaCountTxt.text = ((int) currentMana).ToString("N0") + " / " + ((int) maxMana).ToString("N0");
            }

            if (triggerNaturalMana)
            {
                StopNaturalMana();
                naturalManaCoroutine = NaturalMana(naturalManaRate, naturalManaInterval);
                StartCoroutine(naturalManaCoroutine);
            }

        }

        public void DamageMana(float dmg)
        {
            currentMana -= dmg;
            if (currentMana <= 0)
            {
                currentMana = 0;
            }

            SetIntoScreen();
        }

        public void RestoreMana(float res)
        {
            currentMana += (int) res;
            if (currentMana > maxMana)
            {
                currentMana = maxMana;
            }

            SetIntoScreen();
        }

        public void ChangeBarFilled()
        {
            if (barCapacity < 0.1f)
            {
                barCapacity = 0.1f;
                Debug.LogWarning("Barfilled must be between 0.1 and 1");
            }

            blockbar.fillAmount = 1 - barCapacity;
            manabar.fillAmount = barCapacity;
            damagebar.fillAmount = barCapacity;
        }

        public void SetNaturalMana()
        {
            StopNaturalMana();
            naturalManaCoroutine = NaturalMana(naturalManaRate, naturalManaInterval);
            StartCoroutine(naturalManaCoroutine);
        }

        public void StopNaturalMana()
        {
            if (naturalManaCoroutine != null)
            {
                StopCoroutine(naturalManaCoroutine);
            }
        }

        void SetIntoScreen()
        {
            barFilled = barCapacity * currentMana / maxMana;
            manabar.fillAmount = barFilled;

            if (damagebar.fillAmount > manabar.fillAmount)
            {
                if (setImagesCoroutine != null)
                {
                    StopCoroutine(setImagesCoroutine);
                }

                setImagesCoroutine = setImages();
                StartCoroutine(setImagesCoroutine);
            }
            else
            {
                damagebar.fillAmount = manabar.fillAmount;
            }

            if (manaCountTxt)
            {
                manaCountTxt.text = ((int) currentMana).ToString("N0") + " / " + ((int) maxMana).ToString("N0");

            }
        }

        IEnumerator setImages()
        {
            yield return new WaitForSeconds(0.25f);
            while (manabar.fillAmount < damagebar.fillAmount)
            {
                damagebar.fillAmount -= 0.005f;
                yield return new WaitForSeconds(0.015f);
            }

        }

        IEnumerator NaturalMana(float mana, float interval)
        {
            while (true)
            {
                yield return new WaitForSeconds(interval);
                RestoreMana(mana);
            }
        }

    }
}