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

public class DialogueManager : MonoBehaviour
{
	#region Statication

	public static DialogueManager instance;

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

	#endregion

	private class Choice
	{
		public string choiceName;
		public DialogueScript choiceScript;
	}
	[Header("Player")] 
	public Player player;
	[Header("Dialogue Script")]
	public DialogueScript currentDialogueScript;
	public DialogueScript[] allDialogue;
	public bool clickingDisabled = false;
	private int textProgress;
	public string[] scriptLines;
	[Header("UI")] 
	public GameObject uiCanvas;
	public TextMeshProUGUI nameText;
	public TextMeshProUGUI dialogueText;
	public Button choiceButton;
	public Transform choicePanel;

	public void StartDialogue(DialogueScript scriptToShow)
	{
		uiCanvas.SetActive(true);
		textProgress = 0;
		currentDialogueScript = scriptToShow;
		scriptLines = currentDialogueScript.script.text.Split("\n");
		player.abilitiesDisabled = true;
		player.stalled = true;
		UpdateDialogue();
	}

	private void ContinueDialogue()
	{
		textProgress++;
		clickingDisabled = false;
		UpdateDialogue();
	}

	private void UpdateDialogue()
	{
		string[] words = scriptLines[textProgress].Split(" ");
		switch (words[0].ToUpper())
		{
			case "END":
				EndDialogue();
				break;
			case "TEXT":
				foreach (DialogueCharacter character in currentDialogueScript.characters)
				{
					if (string.Equals(character.name, words[1], StringComparison.CurrentCultureIgnoreCase))
					{
						nameText.text = character.name;
						string text = string.Join(" ", words[2..]);
						text = text.Replace("\"", "");
						dialogueText.text = text;
						break;
					}
				}
				break;
			case "TASK": //must use 3 words on these.
				string taskModifier = words[1].ToUpper();
				if (taskModifier == "ADD")
				{
					foreach (Task task in TaskManager.instance.taskList)
					{
						if (string.Equals(task.taskID, words[2], StringComparison.CurrentCultureIgnoreCase))
						{
							TaskManager.instance.AddTask(task);
							break;
						}
					}
				}
				ContinueDialogue();
				break;
			case "ITEM":
				string itemModifier = words[1].ToUpper();
				if (itemModifier == "ADD")
				{
					foreach (Item item in InventoryManager.instance.itemList)
					{
						if (string.Equals(item.itemName, words[2], StringComparison.CurrentCultureIgnoreCase))
						{
							InventoryManager.instance.AddItem(item, Int32.Parse(words[3]));
							break;
						}
					}
				}
				ContinueDialogue();
				break;
			case "#":
				ContinueDialogue();
				break;
			case "CHOICE":
				clickingDisabled = true;
				List<Choice> choices = new();
				for (int i = 1; i < words.Length; i++)
				{
					Choice newChoice = new Choice();
					string[] c = words[i].Split(":");
					newChoice.choiceName = c[0];
					foreach (DialogueScript dialogueScript in allDialogue)
					{
						if (string.Equals(c[1], dialogueScript.dialogueID, StringComparison.CurrentCultureIgnoreCase))
						{
							newChoice.choiceScript = dialogueScript; //this is the worst way ever to find a matching id but WHATEVER
							break;
						}
					}

					if (!newChoice.choiceScript)
					{
						Debug.LogWarning("BRO WTF THERE IS NO MATCHING ID!!!");
					}
					else
					{
						choices.Add(newChoice);
					}
				}

				foreach (Choice possibleChoice in choices)
				{
					Button newChoiceButton = Instantiate(choiceButton, choicePanel);
					newChoiceButton.onClick.AddListener(() => StartDialogue(possibleChoice.choiceScript));
					newChoiceButton.GetComponentInChildren<TextMeshProUGUI>().text = possibleChoice.choiceName;
				}
				break;
		}
	}

	public void EndDialogue()
	{
		//TaskManager.instance.AddTask(currentDialogueScript.taskToStart);
		uiCanvas.SetActive(false);
		currentDialogueScript = null;
		scriptLines = null;
		player.abilitiesDisabled = false;
		player.stalled = false;
	}
	private void Update()
	{
		if (currentDialogueScript && Input.GetMouseButtonDown(0))
		{
			ContinueDialogue();
		}
	}
}