using System;
using System.Collections;
using System.Collections.Generic;
using Unity.VisualScripting;
using UnityEngine;
using UnityEngine.Animations;
using UnityEngine.UIElements;

public class PickUpObject : MonoBehaviour
{
    public GameObject carryPosition; // blank object, position declares where the object will be teleported to/carried
    public bool insideTrigger = false; // checks if player is inside the trigger of a pickup object 
    public bool playerIsCarrying = false; // checks if player is carrying an object
    public GameObject nearestCarriableObject; 
    public GameObject previousObject; // previous object that player was carrying
    public GameObject heldObject; // object that player is currently holding
    public float throwForce;
    /// <summary>
    /// Cooldown time between picking up objects in seconds
    /// </summary>
    public float cooldownSeconds = 1; 
    public bool cooldownActive = true;
    public KeyCode interactKey = KeyCode.F;
    
    // Start is called before the first frame update
    void Start()
    {

    }

    // Update is called once per frame
    void Update()
    {
        // * Cubes are quite hot so need time to cool off
        cooldownSeconds -= Time.deltaTime; 
        cooldownActive = cooldownSeconds > 0;

        // * Old objects deserve gravity too
        if(previousObject != null && previousObject.GetComponent<Rigidbody>().useGravity == false)
        {
            previousObject.GetComponent<Rigidbody>().useGravity = true;
        }
        
        if(insideTrigger && Input.GetKeyDown(KeyCode.F) && !cooldownActive)
        {
            // * Who needs gravity
            nearestCarriableObject.GetComponent<Rigidbody>().useGravity = false;
            playerIsCarrying = true;
            heldObject = nearestCarriableObject;
            cooldownSeconds = 1;
        }
        // * YEET
        else if(playerIsCarrying && Input.GetKeyDown(KeyCode.F))
        {
            heldObject.GetComponent<Rigidbody>().useGravity = true;
            previousObject = heldObject;
            playerIsCarrying = false;
            previousObject.GetComponent<Rigidbody>().AddForce(transform.forward * throwForce, ForceMode.Impulse);
            Debug.Log("Yoted!");
        }

        // * Cubes not stored above heads are highly dangerous
        if(playerIsCarrying)
        {
            nearestCarriableObject.transform.position = carryPosition.transform.position;
            nearestCarriableObject.transform.rotation = carryPosition.transform.rotation;
        }
    }

    // Called when the player is inside a trigger tagged as PickupObject
    void OnTriggerStay(Collider otherObject)
    {
        if(otherObject.gameObject.tag == "PickupObject" && !cooldownActive)
        {
            nearestCarriableObject = otherObject.gameObject;
            insideTrigger = true;
            // * old cube is boring
            if(heldObject != null && heldObject != nearestCarriableObject && playerIsCarrying)
            {
                previousObject = heldObject;
                cooldownSeconds = 1;
            }
        }
    }

    // If player is not inside trigger, then they probably aren't inside it
    void OnTriggerExit(Collider otherObject)
    {
        if(otherObject.gameObject.tag == "PickupObject")
        {
            insideTrigger = false;
        }
    }
}

//! To make player launch self:
//! add public GameObject player; and place player in it fron inspector
//! in if(insiderTrigger && Input.GetKeyDown(KeyCode.F))
//! Place the code below:
//! player.GetComponent<Rigidbody>().AddForce(transform.forward * throwForce, ForceMode.Impulse);
//! Run the game and press F to launch the player