using AceFieldNewHorizon.Scripts.Tiles;
using Godot;

namespace AceFieldNewHorizon.Scripts.System;

public partial class PlacementManager : Node2D
{
    [Export] public PackedScene BuildingScene { get; set; }
    [Export] public GridManager Grid { get; set; }

    private Vector2I _hoveredCell;
    private BaseTile _ghostBuilding;

    public override void _Process(double delta)
    {
        // Snap mouse to grid
        var mousePos = GetGlobalMousePosition();
        _hoveredCell = GridUtils.WorldToGrid(mousePos);

        if (_ghostBuilding == null)
        {
            _ghostBuilding = (BaseTile)BuildingScene.Instantiate();
            _ghostBuilding.SetGhostMode(true);
            AddChild(_ghostBuilding);
        }

        _ghostBuilding.Position = GridUtils.GridToWorld(_hoveredCell);
        _ghostBuilding.SetGhostMode(true);

        // Left click to place
        if (!Input.IsActionPressed("build_tile") || !Grid.IsCellFree(_hoveredCell)) return;

        _ghostBuilding.SetGhostMode(false);
        Grid.OccupyCell(_hoveredCell, _ghostBuilding);

        _ghostBuilding = (BaseTile)BuildingScene.Instantiate();
        _ghostBuilding.SetGhostMode(true);
        AddChild(_ghostBuilding);
    }
}