using System;
using UnityEngine.UI;
using TMPro;
using UnityEngine;
using UnityEngine.InputSystem;
public class BallController : MonoBehaviour {

    [SerializeField] private TMP_Text _pickupLeftText;
    [SerializeField] private TMP_Text _timeSpentText;
    [SerializeField] private TMP_Text _winText;
    [SerializeField] Button _playAgain; 
    [SerializeField] Button _quit; 
    int _pickupLeft;
    float _ballSpeed;
    float _brakeForce;
    float _jumpForce;
    Rigidbody _ball;
    float _outOfBounds = -1.8f;

    void Start() {
        _ball = GetComponent<Rigidbody>();
        _ballSpeed = 3f;
        _brakeForce = 0.3f;
        _jumpForce = 14f;
        _pickupLeft = GameObject.FindGameObjectsWithTag("PickUp").Length;
        transform.position = new Vector3(0, 0.5f, 0);
    }

    void Update() {
        KeyHandler();
        CheckPlayerOut();
        UpdateGUI();
    }

    void UpdateGUI() {
        _pickupLeftText.text = "Left: " + _pickupLeft.ToString();
        _timeSpentText.text = "Tid: " + Time.timeSinceLevelLoad.ToString("F1") + "s";
    }

    void OnTriggerEnter(Collider other) {
        other.gameObject.SetActive(false);
        _pickupLeft--;
        if (_pickupLeft == 0)
            LevelDone();
    }

    void LevelDone() {
        _pickupLeftText.gameObject.SetActive(false);
        _timeSpentText.gameObject.SetActive(false);
        _winText.text = "Snyggt jobbat!\nDin tid: " + Time.timeSinceLevelLoad.ToString("F1") + "s";
        _winText.gameObject.SetActive(true);
        _playAgain.gameObject.SetActive(true);
        _quit.gameObject.SetActive(true);
    }

    void CheckPlayerOut() {
        if (transform.position.y < _outOfBounds) {
            transform.position = new Vector3(0, 1f, 0);
            transform.rotation = Quaternion.Euler(0, 0, 0);
        }
    }

    void KeyHandler() {
        if (Keyboard.current.wKey.isPressed) {
            _ball.AddForce(Vector3.forward * _ballSpeed);
        }
        else if (Keyboard.current.sKey.isPressed) {
            _ball.AddForce(Vector3.back * _ballSpeed);
        }
        else if (Keyboard.current.dKey.isPressed) {
            _ball.AddForce(Vector3.right * _ballSpeed);
        }
        else if (Keyboard.current.aKey.isPressed) {
            _ball.AddForce(Vector3.left * _ballSpeed);
        }
        if (Keyboard.current.spaceKey.isPressed && transform.position.y < 1) {
            _ball.AddForce(Vector3.up * _jumpForce);
        }
        else {
            _ball.AddForce(-_ball.linearVelocity * _brakeForce);
        }
    }
}