class_name CrowdSystem
extends RefCounted
## Models crowd mood and public reaction (PLAN.md: Public Crowd Reaction).

const EventBus := preload("res://src/core/event_bus.gd")
## mood: 0.0 (calm) .. 1.0 (panic). attention: how many people are watching.

signal changed(payload: Dictionary)

var event_bus: EventBus = null
var mood: float = 0.05
var attention: float = 0.0
var crowd_panic := false

func set_event_bus(bus: EventBus) -> void:
	event_bus = bus

## Apply a crowd event. type: "calm_professionalism", "aggressive_behavior",
## "visible_weapon", "emergency_responder", "de_escalation".
func apply_event(event_type: String) -> void:
	match event_type:
		"calm_professionalism":
			attention = maxf(0.0, attention - 0.05)
			mood = maxf(0.0, mood - 0.02)
		"de_escalation":
			mood = maxf(0.0, mood - 0.06)
			attention = clampf(attention + 0.05, 0.0, 1.0)
		"aggressive_behavior":
			attention = clampf(attention + 0.20, 0.0, 1.0)
			mood = clampf(mood + 0.12, 0.0, 1.0)
		"visible_weapon":
			attention = 1.0
			mood = clampf(mood + 0.35, 0.0, 1.0)
		"emergency_responder":
			attention = 1.0
			mood = clampf(mood + 0.25, 0.0, 1.0)
		_:
			pass
	crowd_panic = mood >= 0.75
	if event_bus:
		event_bus.crowd_changed.emit({
			"mood": mood,
			"attention": attention,
			"panic": crowd_panic,
			"event": event_type,
		})

## Presentation cue for the avatars after a crowd event (PLAN: Public Crowd
## Reaction). "watch" = rubberneck at the incident, "flee" = move away from the
## door, "" = no reaction. Pure so it is headless-testable.
static func reaction_for_event(event_type: String) -> String:
	match event_type:
		"aggressive_behavior", "visible_weapon", "emergency_responder":
			return "watch"
		_:
			return ""

## True once the crowd is panicking hard enough that people should clear out.
func should_flee() -> bool:
	return crowd_panic

func summary() -> Dictionary:
	return {
		"mood": mood,
		"attention": attention,
		"panic": crowd_panic,
	}