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

public class Dialogue : MonoBehaviour
{
    public TextMeshProUGUI textComponent;
    public string[] lines; //lines to be displayed
    public float textSpeed; //speed text is written
    private int index; //current dialogue line displayed

    private void Start()
    {
        textComponent.text = string.Empty; //empty string to initialize 
        StartDialogue(); //run dialogue
    }

    void Update()
    {
        if(Input.GetMouseButtonDown(0)) //left click to continue to next dialogue line
        {
            if (textComponent.text == lines[index])
            {
                NextLine();
            }
            else 
            {
                StopAllCoroutines(); 
                textComponent.text = lines[index];
            }
        }

        if(Input.GetKeyDown(KeyCode.E)) //E to return to the menu
        {
            SceneManager.LoadScene("Menu");
        }

        else if(Input.GetKeyDown(KeyCode.Q)) //Q to quit the game
        {
            Application.Quit();
            #if UNITY_EDITOR
            UnityEditor.EditorApplication.isPlaying = false;
            #endif
        }
    }

    void StartDialogue()
    {
        index = 0; //Initialize the indes to first line
        StartCoroutine(TypeLine()); //start displaying the text character by character
    }

    IEnumerator TypeLine()
    {
        foreach (char c in lines[index].ToCharArray()) //each character displayed one by one
        {
            textComponent.text += c;    
            yield return new WaitForSeconds(textSpeed);
        }
    }

    void NextLine()
    {
        if (index < lines.Length -1) //more lines to display?
        {
            index++; //Index to next line incremented
            textComponent.text = string.Empty; //clear text
            StartCoroutine(TypeLine()); //start displaying next line
        }
        else
        {
            SceneManager.LoadScene("Menu"); //load menu if all lines are displayed
            gameObject.SetActive(false);
        }
    }
}