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

public class PlayerMovement : MonoBehaviour{

    [SerializeField] Grid startGrid = default;
    [SerializeField] float speed = 5f;
    float currentStep;

    Grid currentGrid;
    Grid lastGrid;

    Animator anim;
    SpriteRenderer spriteRenderer;

    [SerializeField] float timeToLoad = 1f;
    float currentTime;

    // Start is called before the first frame update
    void Awake(){
        currentGrid = lastGrid = startGrid;
        anim = GetComponent<Animator>();
        spriteRenderer = GetComponent<SpriteRenderer>();
        AudioManager.instance.StopAll();
        AudioManager.instance.Play("forest");
    }

    // Update is called once per frame
    void Update(){
        if (Input.GetKeyDown(KeyCode.W)){
            anim.SetTrigger("runBack");
            if(transform.position == currentGrid.transform.position){
                if(currentGrid.upGrid != null){
                    lastGrid = currentGrid;
                    currentGrid = currentGrid.upGrid;
                    currentStep = 0;
                    StartCoroutine(ChangeIddle("iddleBack"));
                }
            }
        }else if (Input.GetKeyDown(KeyCode.S)){
            anim.SetTrigger("runFront");
            if (transform.position == currentGrid.transform.position){
                if (currentGrid.downGrid != null){
                    lastGrid = currentGrid;
                    currentGrid = currentGrid.downGrid;
                    currentStep = 0;
                    StartCoroutine(ChangeIddle("iddleFront"));
                }
            }
        }else if (Input.GetKeyDown(KeyCode.A)){
            anim.SetTrigger("runSide");
            spriteRenderer.flipX = true;
            if (transform.position == currentGrid.transform.position){
                if (currentGrid.leftGrid != null){
                    lastGrid = currentGrid;
                    currentGrid = currentGrid.leftGrid;
                    currentStep = 0;
                    StartCoroutine(ChangeIddle("iddleSide"));
                }
            }
        }else if (Input.GetKeyDown(KeyCode.D)){
            anim.SetTrigger("runSide");
            spriteRenderer.flipX = false;
            if (transform.position == currentGrid.transform.position){
                if (currentGrid.rightGrid != null){
                    lastGrid = currentGrid;
                    currentGrid = currentGrid.rightGrid;
                    currentStep = 0;
                    StartCoroutine(ChangeIddle("iddleSide"));
                }
            }
        }

        currentStep += speed * .5f * Time.deltaTime;
        currentStep = Mathf.Clamp(currentStep, 0, 1);
        transform.position = Vector3.Lerp(lastGrid.transform.position, currentGrid.transform.position, currentStep);
    }

    void OnTriggerStay2D(Collider2D col){
        if (col.CompareTag("AttackGrid")){
            currentTime += Time.deltaTime;
            if (col.GetComponent<Grid>().isBoss){
                //Load Boss
                if (currentTime > timeToLoad){
                    GameMaster.instance.LoadBoss(col.GetComponent<Grid>().index);
                }
            }
            else{
                //Load RandomCombat
                if (currentTime > timeToLoad){
                    GameMaster.instance.LoadGrid(col.GetComponent<Grid>().index);
                }
            }
        }
    }

    IEnumerator ChangeIddle(string triggerId){

        yield return new WaitForSeconds(0.05f);

        Color alphaColor = spriteRenderer.color;
        while(alphaColor.a > 0){
            alphaColor.a -= 0.15f;
            spriteRenderer.color = alphaColor;
            yield return new WaitForSeconds(0.01f);
        }

        yield return new WaitForSeconds(0.7f);

        anim.SetTrigger(triggerId);

        while (alphaColor.a < 1){
            alphaColor.a += 0.15f;
            spriteRenderer.color = alphaColor;
            yield return new WaitForSeconds(0.01f);
        }

    }
}