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

public class TaskManager : MonoBehaviour
{
	#region Statication

	public static TaskManager instance;

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

	#endregion
	
	public Task[] taskList; //list of all tasks in the game
	public List<Task> activeTasks = new(); //it doesn't need to be serialized wtf are you talking about
	public int maxTasksActive;
	public Task startingTask;
	[Header("UI")] 
	[SerializeField] private TaskUIObject templateTaskUI;
	public Transform taskGrid;
	public TextMeshProUGUI taskNameUI;
	public TextMeshProUGUI taskDescriptionUI;
	public Dictionary<Task, TaskUIObject> allTaskUIObjects = new();
	
	public bool AddTask(Task taskToAdd)
	{
		if (activeTasks.Count >= maxTasksActive)
		{
			return false;
		}
		activeTasks.Add(taskToAdd);
		AddTaskUIObject(taskToAdd);
		return true;
	}

	private void Start()
	{
		//AddTask(startingTask);
	}

	public void CompleteTask(Task taskToComplete)
	{
		//remove items from inventory aswell. also need to 
		//activeTasks.Remove(taskToComplete);
		Debug.Log($"{taskToComplete.taskName} COMPLETED");
		foreach (InventoryManager.ItemAmount itemReward in taskToComplete.itemRewards)
		{
			InventoryManager.instance.AddItem(itemReward.item, itemReward.amount);
		}
		InventoryManager.instance.AddMoney(taskToComplete.moneyReward);
	}
	
	public void CheckInventory()
	{
		foreach (Task task in activeTasks)
		{
			bool skip = false;
			foreach (InventoryManager.ItemAmount itemRequirment in task.itemRequirements)
			{
				if (InventoryManager.instance.storedItems[itemRequirment.item] < itemRequirment.amount) //doesn't track enemies killed yet but i haven't added combat yet
				{
					skip = true;
					break;
				}
			}
			if (!skip)
			{
				CompleteTask(task);
			}
		}
	}

	public void AddTaskUIObject(Task requestedTask)
	{
		TaskUIObject newTaskUIObject = Instantiate(templateTaskUI, taskGrid);
		allTaskUIObjects[requestedTask] = newTaskUIObject;
		newTaskUIObject.SetTask(requestedTask);
	}
	public void SetTaskUI(Task requestedTask)
	{
		taskNameUI.text = requestedTask.taskName;
		taskDescriptionUI.text = requestedTask.description;
	}
}