extends Area2D
class_name CafeCompanionTarget

# ============================================================================
# CafeCompanionTarget.gd - 咖啡店陪伴机器人点击组件
# ============================================================================
# 挂在咖啡店 NPC 或被雇佣玩家节点下，负责把鼠标点击转成
# “选择陪伴机器人”事件；真正聊天必须由付费时长购买后开启。
# ============================================================================

@export var servicePointId: String = ""
@export var companionId: String = ""
@export var companionType: String = "npc"
@export var personaName: String = ""
@export var ownerUserId: String = ""
@export var employmentEndsAt: String = ""
@export var selfTarget: bool = false

var _lastClickMsec: int = 0

func _ready() -> void:
	input_pickable = true
	set_process_unhandled_input(true)

func _input_event(_viewport: Viewport, event: InputEvent, _shapeIdx: int) -> void:
	if not (event is InputEventMouseButton):
		return
	var mouseEvent := event as InputEventMouseButton
	if mouseEvent.button_index != MOUSE_BUTTON_LEFT or not mouseEvent.pressed:
		return

	get_viewport().set_input_as_handled()
	_try_emit_target_selected()

func _unhandled_input(event: InputEvent) -> void:
	if not (event is InputEventMouseButton):
		return
	var mouseEvent := event as InputEventMouseButton
	if mouseEvent.button_index != MOUSE_BUTTON_LEFT or not mouseEvent.pressed:
		return
	if not _contains_global_point(get_global_mouse_position()):
		return

	get_viewport().set_input_as_handled()
	_try_emit_target_selected()

func _try_emit_target_selected() -> void:
	var now := Time.get_ticks_msec()
	if _lastClickMsec > 0 and now - _lastClickMsec < 120:
		return
	_lastClickMsec = now
	_emit_target_selected()

func _emit_target_selected() -> void:
	var eventSystem := get_node_or_null("/root/EventSystem")
	if eventSystem == null:
		return

	var payload := {
		"cafe_id": "whale_cafe",
		"service_point_id": servicePointId,
		"companion_id": companionId,
		"companion_type": companionType,
		"persona_name": _resolved_persona_name(),
		"owner_user_id": ownerUserId,
		"employment_ends_at": employmentEndsAt,
		"target_path": str(get_parent().get_path()) if get_parent() != null else "",
	}
	eventSystem.call("emit_event", EventNames.CAFE_COMPANION_SELF_SELECTED if selfTarget else EventNames.CAFE_COMPANION_SELECTED, payload)

func _resolved_persona_name() -> String:
	var normalizedName := personaName.strip_edges()
	if not normalizedName.is_empty():
		return normalizedName
	var parent := get_parent()
	if parent != null and parent.get("npcName") != null:
		return str(parent.get("npcName")).strip_edges()
	return companionId

func _contains_global_point(globalPoint: Vector2) -> bool:
	for child in get_children():
		var shapeNode := child as CollisionShape2D
		if shapeNode == null or shapeNode.disabled or shapeNode.shape == null:
			continue
		if _shape_contains_point(shapeNode, globalPoint):
			return true
	return false

func _shape_contains_point(shapeNode: CollisionShape2D, globalPoint: Vector2) -> bool:
	var localPoint := shapeNode.to_local(globalPoint)
	var shape := shapeNode.shape
	if shape is RectangleShape2D:
		var rectangle := shape as RectangleShape2D
		return Rect2(rectangle.size * -0.5, rectangle.size).has_point(localPoint)
	if shape is CircleShape2D:
		var circle := shape as CircleShape2D
		return localPoint.length() <= circle.radius
	if shape is CapsuleShape2D:
		var capsule := shape as CapsuleShape2D
		var halfHeight: float = maxf(0.0, capsule.height * 0.5 - capsule.radius)
		var clampedY: float = clampf(localPoint.y, -halfHeight, halfHeight)
		return Vector2(localPoint.x, localPoint.y - clampedY).length() <= capsule.radius
	return false