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

public class CameraFollower : MonoBehaviour
{
    public bool autoOffset = true;
    public Transform target;
    public bool isShaking = false;
    public float shakeIntensity = 1;
    public float minFOV = 11;
    public float FOVmultiplier = 5;
    public float smoothness = 0.1f;
    public CameraUpdateMode updateMode;
    public static CameraFollower instance{get; private set;}
    public static void UpdateFrame() {if(instance.updateMode == CameraUpdateMode.Manual){ instance.HandleFrame();}}
    void Awake(){
        instance=this;
    }
    void Start()
    {
        if(target==null){return;}
    }

    // Update is called once per frame
    void FixedUpdate()
    {
        if(updateMode!= CameraUpdateMode.Fixed){return;}
        HandleFrame();
    }

    void LateUpdate(){
        if(updateMode!= CameraUpdateMode.Late){return;}
        HandleFrame();
    }

    void Update(){
        if(updateMode!= CameraUpdateMode.Normal){return;}
        HandleFrame();
    }
    Vector3 lastPos;
    public void HandleFrame(){
        if(target==null){return;}
        if(Mathf.Abs(target.position.x) > 1000 || Mathf.Abs(target.position.y )> 1000){return;}
        transform.position = Vector3.Lerp(lastPos, new Vector3(target.position.x, target.position.y,-10), smoothness * Time.deltaTime);
        lastPos = transform.position;

        if(isShaking){transform.position += Random.insideUnitSphere * shakeIntensity;}
        GetComponent<Camera>().orthographicSize = minFOV + ((target.localScale.x - 1) * FOVmultiplier);
    }

    public void SetTarget(Transform Target){
        target = Target;
    }

    public void ShakeBoost(){
        StartCoroutine(shakeBoost());
    }

    IEnumerator shakeBoost(){
        isShaking = true;
        yield return new WaitForSeconds(0.25f);

        isShaking = false;
    }

    public enum CameraUpdateMode{
        Fixed,
        Late,
        Normal,
        Manual
    }

}