using UnityEngine;

public class PlayerController : MonoBehaviour
{
    public GameObject DougBody;
    public Shovel Shovel;
    public float walkSpeed;

    float digTime = 0.9f;
    float digTimestamp = 0;
    bool isDigging = false;

    Interactable nearestInteractable;
    private CharacterController characterController;
    private Vector3 moveDir;
    private float gravity = 10;
    
    // Start is called once before the first execution of Update after the MonoBehaviour is created
    void Start()
    {
        characterController = GetComponent<CharacterController>();
    }

    // Update is called once per frame
    void Update()
    {
        if (!isDigging)
        {
            RotatePlayerTowardMouse();
            TryInteract();
        }

        Walk();
        DigDetector();
    }

    void Walk()
    {
        float verticalMovement = 0;
        float horizontalMovement = 0;

        if (!isDigging)
        {
            verticalMovement = Input.GetAxisRaw("Vertical");
            horizontalMovement = Input.GetAxisRaw("Horizontal");
        }

        moveDir = new Vector3(horizontalMovement, 0, verticalMovement).normalized;
        moveDir *= walkSpeed;

        if (!characterController.isGrounded)
        {
            moveDir.y = -gravity;
        }

        characterController.Move(moveDir * Time.deltaTime);
    }

    void DigDetector()
    {
        if (!isDigging)
        {
            if (Input.GetMouseButtonDown(0))
            {
                Shovel.Dig();
                isDigging = true;
                digTimestamp = Time.time + digTime; // fuck coroutines fr fr
            }
        }
        else
        {
            if (Time.time > digTimestamp)
            {
                isDigging = false;
            }
        }
    } 

    void RotatePlayerTowardMouse()
    {
        Vector2 positionOnScreen = Camera.main.WorldToViewportPoint(DougBody.transform.position);
        Vector2 mouseOnScreen = (Vector2)Camera.main.ScreenToViewportPoint(Input.mousePosition);

        float angle = Mathf.Atan2(positionOnScreen.y - mouseOnScreen.y, positionOnScreen.x - mouseOnScreen.x) * Mathf.Rad2Deg;

        DougBody.transform.rotation = Quaternion.Euler(new Vector3(0f, -(angle + 90), 0f));
    }

    void TryInteract()
    {
        if (Input.GetKeyDown(KeyCode.E) && nearestInteractable != null)
        {
            nearestInteractable.Interact();
        }
    }

    private void OnTriggerEnter(Collider other)
    {
        Interactable interactable = other.GetComponent<Interactable>();

        // store nearest interactable if it exists
        if (interactable != null)
        {
            nearestInteractable = interactable;
            interactable.MoveInsideRange();
        }
    }

    private void OnTriggerExit(Collider other)
    {
        // just null out interactables when we leave an interactable trigger (we cant and shouldn't overlap interactables)
        Interactable interactable = other.GetComponent<Interactable>();

        // store nearest interactable if it exists
        if (interactable != null && nearestInteractable != null)
        {
            nearestInteractable.MoveOutsideRange();
            nearestInteractable = null;
        }
    }
}