using UnityEngine;

public class InputManager : MonoBehaviour {
    public static InputManager Instance { get; private set; }

    private void Awake() {
        if (Instance is not null) {
            Debug.LogError($"There is more than one InputManager! {transform} - {Instance}");
            Destroy(gameObject);
            return;
        }

        Instance = this;
    }

    public Vector2 GetMouseScreenPosition() => Input.mousePosition;
    public bool IsMouseButtonDown(int button) => Input.GetMouseButtonDown(button);

    public Vector2 GetCameraMoveVector() {
        Vector2 inputMoveDir = new();
        if (Input.GetKey(KeyCode.W)) inputMoveDir.y = +1f;
        if (Input.GetKey(KeyCode.S)) inputMoveDir.y = -1f;
        if (Input.GetKey(KeyCode.A)) inputMoveDir.x = -1f;
        if (Input.GetKey(KeyCode.D)) inputMoveDir.x = +1f;
        return inputMoveDir;
    }

    public float GetCameraRotateAmount() {
        float rotateAmount = 0f;
        if (Input.GetKey(KeyCode.Q)) rotateAmount = +1f;
        if (Input.GetKey(KeyCode.E)) rotateAmount = -1f;
        return rotateAmount;
    }

    public float GetCameraZoomAmount() =>
        Input.mouseScrollDelta.y switch {
            > 0 => -1f,
            < 0 => +1f,
            _ => 0f
        };
}