tool
extends TK_Context
class_name TK_GridContext

## todo: Cell visualization.
## todo: Integration of TileMap.

export var cell_size: Vector2 = Vector2(64, 64) setget _set_cell_size

signal cell_size_changed(p_old_cell_size, p_new_cell_size)

func local_position_to_context_position(p_position: Vector2) -> Vector2:
    return p_position / cell_size

func is_path_traversible(p_from: Vector2, p_to: Vector2) -> bool:
    # todo:
    return true

func try_moving(p_game_object: Node2D, p_from: Vector2, p_to: Vector2) -> bool:
    if not is_path_traversible(p_from, p_to):
        return false
    
    p_game_object.position = cell_size * p_to
    return true

func _set_cell_size(p_new_cell_size: Vector2) -> void:
    if p_new_cell_size.x == 0 or p_new_cell_size.y == 0:
        push_error("Cell size cannot be zero")
        return

    var cell_size_cache = cell_size
    cell_size = p_new_cell_size
    emit_signal("cell_size_changed", cell_size_cache, p_new_cell_size)