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


public class UITextTypewriter : MonoBehaviour {

	public TextMeshProUGUI uiText;
	public AudioClip typeSound1;
	public AudioClip typeSound2;

	[Multiline]
	public string textEntered = "";

	public char[] textEnteredSplit;
	public char[] textToPrintSplit;

	public bool isPrinting;
	public bool keepLog;
	public bool waitForLineBreak;
	public float lineBreakDelay;
	public char waitForLineBreakChar;

	public float charPrintDelay = 0f;

	public bool useFakeEncryption;
	private string[] fakeEncryptionChars;

	private string s;

	private Queue<Message> newMsgQueue = new Queue<Message> (100);

	class Message
	{
		public TextMeshProUGUI uiText;
		public string newMessage;
	}


	void Start () {



		uiText = GetComponent<TextMeshProUGUI> ();
		textEnteredSplit = textEntered.ToCharArray ();
		textToPrintSplit = new char[textEnteredSplit.Length];
		fakeEncryptionChars = new string[10] { "$", "%", "&","/","\\","}","{","|","<",">" };

	}

	void Update () {

		if (Input.GetKeyDown (KeyCode.Space)) {

			if (!isPrinting) {

				textToPrintSplit = new char[textEnteredSplit.Length];
				//StartCoroutine (PrintText (textEntered, uiText));
			}
		}

		if (!isPrinting && newMsgQueue.Count > 0) {
			var m = newMsgQueue.Dequeue();
			isPrinting = true;
			StartCoroutine (PrintText (m.newMessage, m.uiText));
		}
	}

	public void DoPrinting(string newMessage, TextMeshProUGUI uiText) {

		var m = new Message() {
			newMessage = newMessage,
			uiText = uiText,
		};
		newMsgQueue.Enqueue(m);
	}


	public IEnumerator PrintText(string newMessageEntered, TextMeshProUGUI uiText) {

		textEnteredSplit = newMessageEntered.ToCharArray ();
		textToPrintSplit = new char[textEnteredSplit.Length];

		isPrinting = true;

		for (int i = 0; i < textEnteredSplit.Length; i++) {

			textToPrintSplit [i] = textEnteredSplit [i];
			s = new string (textToPrintSplit);

			s = s.Insert(i+1 ,"_");

			if (useFakeEncryption) {

				s = s.Insert(i,fakeEncryptionChars[UnityEngine.Random.Range(0, fakeEncryptionChars.Length)]);
				s = s.Remove (s.Length - 3, 1);
			}

			if (s.Length == s.Length) {

				//s = s.Insert (s.Length - 1, "\n");
				s = s.Remove (s.Length - 1, 1);
			}

			if (keepLog) {

					uiText.text += s[i];


			} else if (!keepLog) {

				uiText.text = s;
			}

			if (typeSound1) {

				//SoundManager.instance.PlaySingle (typeSound1);

				yield return null;
			}

			if (typeSound1 && typeSound2) {

				//SoundManager.instance.RandomizeSfx (typeSound1, typeSound2);
				yield return 0;
			}



			if (waitForLineBreak && textToPrintSplit[i] == waitForLineBreakChar) {

				yield return new WaitForSeconds (lineBreakDelay);

			}

			yield return new WaitForSeconds (UnityEngine.Random.Range(0.01f,charPrintDelay));
		}

		isPrinting = false;
		yield return null;

	}
}