using System.Collections;
using System.Collections.Generic;
using System.Linq;
using Scampz.GameJam.Assets.Scripts;
using Scampz.GameJam.Assets.Scripts.Utilities;
using TMPro;
using UnityEngine;

namespace Scampz.GameJam
{
  public class DialogueManager : MonoBehaviour
  {
    [SerializeField]
    private Animator _animator;
    [SerializeField]
    private TextMeshProUGUI dialogueTextGUI;
    [SerializeField]
    private float _textSpeed = 0.1f;

    private Queue<string> sentences;

    public static DialogueManager Instance;

    public bool IsTalking = false;

    private void Awake()
    {
      if (Instance != null && Instance != this)
      {
        Destroy(this);
        return;
      }

      Instance = this;
    }

    public void Start()
    {
      sentences = new Queue<string>();
    }

    private void Update()
    {
      if (IsTalking && Input.GetButtonDown(InputOptions.Cancel))
        EndDialogue();
    }

    public void StartDialogue(Dialogue dialogue)
    {
      _animator.SetBool("IsOpen", true);
      IsTalking = true;
      sentences.Clear();
      foreach (var sentence in dialogue.sentences)
        sentences.Enqueue(sentence);

      DisplayNextSentence();
    }

    public void DisplayNextSentence()
    {
      if (!sentences.Any())
      {
        EndDialogue();
        return;
      }

      var sentence = sentences.Dequeue();
      StopAllCoroutines();
      StartCoroutine(TypeSentence(sentence));
    }

    private IEnumerator TypeSentence(string sentence)
    {

      dialogueTextGUI.text = string.Empty;
      foreach (var letter in sentence.ToCharArray())
      {
        dialogueTextGUI.text += letter;
        yield return null;
        yield return new WaitForSecondsRealtime(_textSpeed);
      }

      yield return new WaitForKeyDown(InputOptions.Submit);
      DisplayNextSentence();
    }

    private void EndDialogue()
    {
      _animator.SetBool("IsOpen", false);
      IsTalking = false;
    }
  }
}