class_name DamageEmitter
extends Area2D

@export var damage := 10
@export var hit_type: StringName = &"normal"

var action_context: Resource
var judgement_context: Dictionary = {}


func _ready() -> void:
	area_entered.connect(_on_area_entered)


func configure_hit(action: Resource, judgement: Dictionary) -> void:
	action_context = action
	judgement_context = judgement.duplicate()


func _on_area_entered(receiver: Area2D) -> void:
	if receiver.is_in_group("damage_receivers"):
		var final_damage := _resolve_damage()
		receiver.emit_signal("damage_received", final_damage, hit_type, global_position)
		_event_bus().emit_signal("damage_dealt", receiver, final_damage, hit_type)


func _resolve_damage() -> int:
	var combat := _combat_manager_or_null()
	if combat == null:
		return damage
	return int(round(combat.call("resolve_damage", float(damage), action_context, judgement_context, null, null)))


func _event_bus() -> Node:
	var root := get_tree().root
	var bus := root.get_node_or_null("EventBus")
	if bus == null:
		bus = load("res://autoload/event_bus.gd").new()
		bus.name = "EventBus"
		root.add_child(bus)
	return bus


func _combat_manager_or_null() -> Node:
	if not is_inside_tree():
		return null
	return get_tree().root.get_node_or_null("CombatManager")