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

public class DebugUI : MonoBehaviour
{
    public bool debugMode = true;
    public GameObject debugUI;
    public VisualEffect vfx;
    public GameObject baseEmitter;
    public GameObject target;
    public GameObject emitter;
    public GameObject button;
    public float growingSpeed;
    public string stat = "wait";

    float spawn_t;
    float total_t;
    float lerp_val;
    Vector3 final_pos;
    bool showObject;

    void Start()
    {
        stat = "wait";
        debugUI.SetActive(debugMode);
        button.GetComponent<Text>().text = stat;
        spawn_t = 0;
        total_t = 0;
        lerp_val = 0;
    }

    // Update is called once per frame
    void Update()
    {
        if (Input.GetKeyDown(KeyCode.A))
        {
            debugMode = !debugMode;
            debugUI.SetActive(debugMode);
            if (debugMode)
            {
                showObject = true;
                setObjectVisible(showObject);
            } else
            {
                showObject = false;
                setObjectVisible(showObject);
            }
        }
        else if (debugMode && Input.GetKeyDown(KeyCode.D)){
            showObject = !showObject;
            setObjectVisible(showObject);
        }

        if(stat == "growing")
        {
            total_t += Time.deltaTime;
            lerp_val += growingSpeed;
            if(lerp_val >= 1)
            {
                lerp_val = 1;
                stat = "completed";
                //vfx.SendEvent("Completed");
                StartCoroutine("sendCompleted");
                setButtonInteractable(true);
                button.GetComponent<Text>().text = stat;
                Debug.Log(stat);
            }
        }
        else if(stat == "vanishing")
        {
            vfx.SetBool("isEnteringVanish", false);
            lerp_val -= growingSpeed;
            if(lerp_val <= 0)
            {
                lerp_val = 0;
                stat = "wait";
                setButtonInteractable(true);
                button.GetComponent<Text>().text = stat;
                Debug.Log(stat);
            }
        }

        lerp_val = Mathf.Clamp(lerp_val, 0, 1);
        vfx.SetFloat("_LerpVal", lerp_val);


        Vector3 base_pos = baseEmitter.GetComponent<Transform>().position;
        Vector3 target_pos = target.GetComponent<Transform>().position;

        emitter.GetComponent<Transform>().position = Vector3.Lerp(base_pos, target_pos, lerp_val);
        /*
        if (debugMode && Input.GetMouseButtonDown(0))
        {
            ray = Camera.main.ScreenPointToRay(Input.mousePosition);

            GameObject selected_obj = null;

            if (Physics.Raycast(Camera.main.ScreenPointToRay(Input.mousePosition), out hit, 200.0f))
            {
                selected_obj = hit.collider.gameObject;
                Debug.Log("hit!!" + selected_obj.name);
            }

            if(selected_obj != null)
            {
                selected_obj.GetComponent<Renderer>().material.color = new Color(255, 100, 100);
            }
        }
        */
    }

    IEnumerator sendCompleted()
    {
        yield return new WaitForSeconds(0.5f);
        vfx.SendEvent("Completed");
    }

    public void switchStat()
    {
        if(stat == "wait")
        {
            enterGrow();
        }
        else if(stat == "completed")
        {
            enterVanish();
        }

        button.GetComponent<Text>().text = stat;
    }

    public void enterGrow()
    {
        setButtonInteractable(false);
        spawn_t = total_t;
        stat = "growing";
        vfx.SendEvent("MouseDown");
        vfx.SetBool("isGrowing", true);
        Debug.Log(stat);
    }

    public void enterVanish()
    {
        setButtonInteractable(false);
        vfx.SetBool("isEnteringVanish", true);
        stat = "vanishing";
        vfx.SendEvent("MouseUp");
        vfx.SetBool("isGrowing", false);
        Debug.Log(stat);
    }

    private void setObjectVisible(bool isShowed)
    {
        baseEmitter.GetComponent<Renderer>().enabled = isShowed;
        target.GetComponent<Renderer>().enabled = isShowed;
        emitter.GetComponent<Renderer>().enabled = isShowed;
    }

    private void setButtonInteractable(bool _stat)
    {
        //GameObject g = GameObject.Find("Grow");
        //GameObject v = GameObject.Find("Vanish");
        //g.GetComponent<Button>().interactable = _stat;
        button.GetComponentInParent<Button>().interactable = _stat;
    }
}