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

public class UIManager : MonoBehaviour
{
    public static UIManager instance;
    public bool openingStatus;
    public GameObject dialogueBox;
    public Text characterNameText;
    public Text dialogueLineText;
    public GameObject spaceBar;
    float scrollingSpeed = 0.02f;
    bool isScrolling;
    [TextArea(1,3)] public string[] dialogueLines;
    [SerializeField] int currentLine;

    private void Awake()
    {
        if(instance == null)
            instance = this;
        else if(instance != this)
            Destroy(this);
        //DontDestroyOnLoad(gameObject);
    }

    private void Start()
    {
        dialogueLineText.text = dialogueLines[currentLine];
    }

    private void Update()
    {
        if(dialogueBox.activeInHierarchy && GameManager.instance.gameMode == GameManager.GameMode.Normal)
        {
            if(Input.GetKeyUp("x"))
            {
                if(!isScrolling)
                {
                    currentLine ++;
                    if(currentLine < dialogueLines.Length)
                    {
                        CheckName();
                        StartCoroutine(ScrollingText());
                    }
                    else
                    {
                        characterNameText.gameObject.SetActive(true);
                        dialogueBox.SetActive(false);
                    }
                }
                else
                {
                    scrollingSpeed = 0;
                }
            }
        }
    }

    public void ToggleDialogueBox(bool value)
    {
        dialogueBox.SetActive(value);
    }

    public void ToggleSpaceBar(bool value)
    {
        spaceBar.SetActive(value);
    }

    public void SetupDialogue(string name, string dialogue, int size)
    {
        characterNameText.text = name;
        dialogueLineText.fontSize = size;
        StartCoroutine(ScrollingCGText(dialogue));
        ToggleDialogueBox(true);
    }

    public void ShowDialogue(string[] currentDialogueLines, bool hasName = true)
    {
        characterNameText.gameObject.SetActive(hasName);
        currentLine = 0;
        dialogueLines = currentDialogueLines;
        CheckName();
        dialogueBox.SetActive(true);
        StartCoroutine(ScrollingText());
    }
    void CheckName()
    {
        if(dialogueLines[currentLine].StartsWith("n-"))
        {
            characterNameText.text = dialogueLines[currentLine].Replace("n-","");
            currentLine++;
        }
    }

    IEnumerator ScrollingText()
    {
        isScrolling = true;
        dialogueLineText.text = "";
        char[] text = dialogueLines[currentLine].ToCharArray();
        foreach(char letter in text)
        {
            dialogueLineText.text += letter;
            yield return new WaitForSeconds(scrollingSpeed);
        }
        isScrolling = false;
        scrollingSpeed = 0.02f;
    }
    
    IEnumerator ScrollingCGText(string dialogue)
    {
        dialogueLineText.text = "";
        char[] text = dialogue.ToCharArray();
        foreach(char letter in text)
        {
            dialogueLineText.text += letter;
            yield return new WaitForSeconds(scrollingSpeed);
        }
    }
}