100 lines
3.6 KiB
C#
100 lines
3.6 KiB
C#
using System;
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using Grid;
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using UnityEngine;
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using UnityEngine.EventSystems;
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using UnityEngine.Serialization;
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namespace Actions {
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public class UnitActionSystem : MonoBehaviour {
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[FormerlySerializedAs("UnitsLayerMask")] [SerializeField]
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private LayerMask unitsLayerMask;
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[SerializeField] private Unit selectedUnit;
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private bool isBusy;
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private BaseAction selectedAction;
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public static UnitActionSystem Instance { get; private set; }
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private bool IsBusy {
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get => isBusy;
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set {
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isBusy = value;
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OnBusyChanged?.Invoke(this, IsBusy);
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}
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}
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public BaseAction SelectedAction {
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get => selectedAction;
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private set {
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selectedAction = value;
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OnSelectedActionChanged?.Invoke(this, EventArgs.Empty);
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}
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}
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public Unit SelectedUnit {
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get => selectedUnit;
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private set {
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selectedUnit = value;
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OnSelectedUnitChanged?.Invoke(this, EventArgs.Empty);
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}
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}
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private void Awake() {
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if (Instance is not null) {
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Debug.LogError($"There is more than one UnitActionSystem! {transform} - {Instance}");
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Destroy(gameObject);
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return;
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}
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Instance = this;
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}
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private void Start() => SetSelectedUnit(SelectedUnit);
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private void Update() {
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// Debug.Log(LevelGrid.Instance.GetGridPosition(MouseWorld.GetPosition()));
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if (IsBusy) return;
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if (!TurnSystem.Instance.IsPlayerTurn) return;
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if (EventSystem.current.IsPointerOverGameObject()) return;
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if (TryHandleUnitSelection()) return;
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if (SelectedUnit is not null) HandleSelectedAction();
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}
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private void HandleSelectedAction() {
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if (!InputManager.Instance.IsMouseButtonDownThisFrame()) return;
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GridPosition mouseGridPosition = LevelGrid.Instance.GetGridPosition(MouseWorld.GetPositionOnlyHitVisible());
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if (!SelectedAction.IsValidActionGridPosition(mouseGridPosition)) return;
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if (!selectedUnit.TrySpendActionPointsToTakeAction(SelectedAction)) return;
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SetBusy();
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SelectedAction.TakeAction(mouseGridPosition, ClearBusy);
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OnActionStarted?.Invoke(this, EventArgs.Empty);
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}
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private void SetBusy() => IsBusy = true;
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private void ClearBusy() => IsBusy = false;
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public event EventHandler OnSelectedUnitChanged;
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public event EventHandler OnSelectedActionChanged;
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public event EventHandler<bool> OnBusyChanged;
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public event EventHandler OnActionStarted;
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private bool TryHandleUnitSelection() {
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if (!InputManager.Instance.IsMouseButtonDownThisFrame()) return false;
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if (!Physics.Raycast(Camera.main.ScreenPointToRay(InputManager.Instance.GetMouseScreenPosition()), out RaycastHit raycastHit, float.MaxValue, unitsLayerMask)) return false;
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if (!raycastHit.transform.TryGetComponent(out Unit unit) || unit is null) return false;
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if (unit == selectedUnit) return false;
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if (unit.IsEnemy) return false;
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SetSelectedUnit(unit);
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return true;
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}
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private void SetSelectedUnit(Unit unit) {
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SelectedUnit = unit;
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SelectedAction = unit.GetAction<MoveAction>();
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}
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public void SetSelectedAction(BaseAction baseAction) => SelectedAction = baseAction;
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}
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} |