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

public class Test : MonoBehaviour {

    public float currentEnergy { get; set; }
    public float maxEnergy { get; set; }

    public float abilityCost;
    //These trigger buttons will be set in the ability scripts
    //public string p1TriggerButton1;
    //public string p1TriggerButton2;

    private bool stopECost = true;

    public float nextFire;
    public float cooldown;

    private Text insufficientSP;
    private Text SPAmount;

    [SerializeField]
    private Slider energyBar;

    // Use this for initialization
    void Start () {
        //Load this gameobjects basis cooldown script so we can use them to check if we can use more energy
        cooldown = 2f;
        nextFire = 2f;

        maxEnergy = 10f;
        //Resets to value on game load
        currentEnergy = 7f;

        StartCoroutine(AddEnergy());
    }

    // Update is called once per frame
    void Update () {
        energyBar = GameObject.Find("Slider").GetComponent<Slider>();
        energyBar.value = CurrentEnergy();

        SPAmount = GameObject.Find("Text").GetComponent<Text>();
        SPAmount.text = CurrentEnergy() * 10 + "SP";

        PlayerTriggers();
    }

    public void EnergyCost(float aCostValue)
    {
        if (currentEnergy >= abilityCost && Time.time > nextFire)
        {
            nextFire = Time.time + cooldown; //Using basis cooldown script to check if the ability is ready, so we can use more energy

            //Deduct the energy spent from the current energy
            currentEnergy -= aCostValue;
            energyBar.value = CurrentEnergy();
        }
        //If there is insufficient energy alert and stop use
        else if(currentEnergy < abilityCost){
            StartCoroutine(NotEnoughEnergy());
        } else {
            Debug.Log("Cooldown!");
        }

        //If the current energy is less or 0 set it to 0 so we wont get negative energy
        if (currentEnergy < 0f)
        {
            currentEnergy = 0f;
        }
    }

    public void PlayerTriggers()
    {
        //If player presses one of their ability buttons we subtract the abilities cost thorugh the EnergyCost() script
        if (Input.GetKeyDown(KeyCode.Space))
        {
            EnergyCost(abilityCost);
        }
    }

    float CurrentEnergy()
    {
        return currentEnergy / maxEnergy;
    }

    public IEnumerator NotEnoughEnergy()
    {
        insufficientSP = GameObject.Find("NoText").GetComponent<Text>();
        insufficientSP.text = "Not enough Energy...";

        yield return new WaitForSeconds(2);

        insufficientSP.text = "";
    }

    public IEnumerator AddEnergy()
    {
        while (true)// loops forever
        {
            //if current energy is less than maxenergy
            if(currentEnergy < maxEnergy)
            {
                currentEnergy += 1; //increase energy with 1
                yield return new WaitForSeconds(3);
            }

            else //if currentenergy is 10>=
            {
                yield return null;
            }
        }
    }
}