extends SceneTree
## Writes the project's input map into project.godot.
##
## Hand-editing the [input] section is error-prone -- the events are serialised
## engine objects with a long property list. Generating them through the real
## API means the file is always in the format the engine expects.
##
##   godot --headless --path . --script tools/setup_input_map.gd
##
## Re-run after changing the bindings below. Physical keycodes are used so the
## bindings follow key position rather than layout.


func _init() -> void:
	_action("move_up", [_key(KEY_W), _key(KEY_UP)])
	_action("move_down", [_key(KEY_S), _key(KEY_DOWN)])
	_action("move_left", [_key(KEY_A), _key(KEY_LEFT)])
	_action("move_right", [_key(KEY_D), _key(KEY_RIGHT)])
	_action("fire", [_mouse(MOUSE_BUTTON_LEFT), _key(KEY_SPACE)])
	_action("emergency_escape", [_key(KEY_F)])
	_action("interact", [_key(KEY_E)])
	# One per inventory slot. Number keys use the slot; shift-number drops it,
	# which is read in code rather than bound here -- a modifier is not an
	# action, and duplicating four bindings to express it would be worse.
	for i in SimConfig.INVENTORY_SLOTS:
		_action("use_slot_%d" % (i + 1), [_key((KEY_1 + i) as Key)])
	_action("system_menu", [_key(KEY_ESCAPE)])
	_action("debug_overlay", [_key(KEY_F1)])
	var err := ProjectSettings.save()
	print("input map written, err=%d" % err)
	quit(0 if err == OK else 1)


func _action(name: String, events: Array) -> void:
	ProjectSettings.set_setting("input/" + name, {
		"deadzone": 0.2,
		"events": events,
	})


## device -1 (DEVICE_ID_EMULATION) is what the editor writes and is the only
## value that matches input from a real device. A freshly constructed event
## defaults to 16, which silently matches nothing.
func _key(code: Key) -> InputEventKey:
	var e := InputEventKey.new()
	e.device = -1
	e.physical_keycode = code
	return e


func _mouse(button: MouseButton) -> InputEventMouseButton:
	var e := InputEventMouseButton.new()
	e.device = -1
	e.button_index = button
	return e