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

[DisallowMultipleComponent]
[RequireComponent(typeof(Text))]
public class TypeWriterEffect:MonoBehaviour {

    [SerializeField]
    [Range(0,1)]
    float m_Speed;
    public float speed { get { return m_Speed; } }

    [SerializeField]
    [Range(0.05f,5.0f)]
    float m_Interval;
    public float interval { get { return m_Interval; } }

    float m_Progresss = 0f;
    public float progress {
        get { return m_Progresss; }
        set {
            m_Progresss = Mathf.Clamp01(value);
            if(material != null) {
                material.SetFloat("_FillAmount",m_Progresss);
            }
        }
    }

    Text m_Text;
    public Text text { get { return m_Text ?? (m_Text = this.GetComponent<Text>()); } }

    Material material { get { return text.material; } }

    float timer = 0f;
    void OnEnable() {
        timer = 0f;
        progress = 0f;
    }

    public void StartTypeWriter(float _progress) {
        progress = _progress;
        timer = 0f;
    }

    void LateUpdate() {
        if(progress >= 1f) {
            return;
        }

        timer += Time.deltaTime;
        if(timer > interval) {
            timer = 0;
            progress += speed;
        }
    }



}