class_name RadioSystem
extends RefCounted

const Rules := preload("res://src/core/rules.gd")
const EventBus := preload("res://src/core/event_bus.gd")
## Radio call handling (PLAN.md: Level 4 radio assist, Level 5 emergency).
## - Level 4: security assistance with a report form, arrival delay.
## - Level 5: emergency radio, hold-to-confirm enforced by calling layer,
##   cooldown and battery limits to prevent spam.
## - Incorrect/exaggerated reports damage credibility (recorded via reporter).

signal call_made(call_data: Dictionary)
signal responder_arrived(call_data: Dictionary)

var battery: float = 100.0
var max_battery: float = 100.0
var emergency_cooldown_remaining: float = 0.0
var emergency_cooldown_seconds: float = 120.0
var battery_cost_emergency: float = 30.0
var battery_cost_assist: float = 10.0

var accepting_calls := true
var event_bus: EventBus = null

## Dispatched calls awaiting their responder's arrival. Each entry is the call
## dictionary with a mutable `arrival_delay_s` that `tick` decrements.
var pending_calls: Array[Dictionary] = []

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

## report: { npc_id, location, description, behavior, weapons_seen, danger_level: 0..3 }
func request_assistance(report: Dictionary) -> Dictionary:
	var result := {
		"ok": false,
		"level": Rules.Level.RADIO_ASSIST,
		"reason": "",
		"call": {},
	}
	if not accepting_calls:
		result.reason = "Radio not accepting calls"
		return result
	if battery < battery_cost_assist:
		result.reason = "battery depleted"
		return result
	battery -= battery_cost_assist
	var call := {
		"type": "assist",
		"report": report.duplicate(),
		"placed_at_ms": Time.get_ticks_msec(),
		"arrival_delay_s": 8.0,
		"responder": "security",
	}
	result.ok = true
	result.call = call
	pending_calls.append(call)
	call_made.emit(call)
	if event_bus:
		event_bus.radio_call.emit(call)
	return result

## Emergency call. The caller (UI) must handle hold-to-confirm; this applies
## cooldown and battery limits.
func request_emergency(report: Dictionary) -> Dictionary:
	var result := {
		"ok": false,
		"level": Rules.Level.EMERGENCY,
		"reason": "",
		"call": {},
	}
	if not accepting_calls:
		result.reason = "Radio not accepting calls"
		return result
	if emergency_cooldown_remaining > 0.0:
		result.reason = "Cooldown active (%.1fs)" % emergency_cooldown_remaining
		return result
	if battery < battery_cost_emergency:
		result.reason = "battery depleted"
		return result
	battery -= battery_cost_emergency
	emergency_cooldown_remaining = emergency_cooldown_seconds
	var call := {
		"type": "emergency",
		"report": report.duplicate(),
		"placed_at_ms": Time.get_ticks_msec(),
		"arrival_delay_s": 15.0,
		"responder": "armed_responder",
	}
	result.ok = true
	result.call = call
	pending_calls.append(call)
	call_made.emit(call)
	if event_bus:
		event_bus.radio_call.emit(call)
	return result

## Report inaccuracies deserve a reputation hit. Caller uses this helper.
static func credibility_hits(report: Dictionary, truth: Dictionary) -> int:
	var hits := 0
	if report.get("weapons_seen", false) != truth.get("weapons_seen", false):
		hits += 1
	var danger: int = report.get("danger_level", 0)
	var actual_danger: int = truth.get("danger_level", 0)
	if danger != actual_danger:
		hits += 1
	return hits

## Advance cooldown and pending-call arrival timers; called by the simulation
## tick. When a call's arrival delay elapses, the responder arrives and the
## `responder_arrived` signal fires with the call data.
func tick(delta: float) -> void:
	if emergency_cooldown_remaining > 0.0:
		emergency_cooldown_remaining = maxf(0.0, emergency_cooldown_remaining - delta)
		# Battery could slowly recharge over a shift; keep it static for now.
	var arrived: Array[Dictionary] = []
	for call in pending_calls:
		call["arrival_delay_s"] = call.get("arrival_delay_s", 0.0) - delta
		if call["arrival_delay_s"] <= 0.0:
			arrived.append(call)
	for call in arrived:
		pending_calls.erase(call)
		responder_arrived.emit(call)
		if event_bus:
			event_bus.responder_arrived.emit(call)

func snapshot() -> Dictionary:
	return {
		"battery": battery,
		"emergency_cooldown_remaining": emergency_cooldown_remaining,
		"accepting_calls": accepting_calls,
		"pending_calls": pending_calls.duplicate(true),
	}

func restore(data: Dictionary) -> void:
	battery = clampf(float(data.get("battery", 100.0)), 0.0, max_battery)
	emergency_cooldown_remaining = maxf(0.0, float(data.get("emergency_cooldown_remaining", 0.0)))
	accepting_calls = bool(data.get("accepting_calls", true))
	pending_calls.clear()
	for call in data.get("pending_calls", []):
		if call is Dictionary:
			pending_calls.append((call as Dictionary).duplicate(true))

## Determine the responder's resolution outcome for a call. The responder
## commands, restrains, evacuates, or arrests based on the reported danger
## level and whether a weapon was seen (PLAN.md: Level 5 Emergency Response).
## Returns a resolution string: "command", "restraint", "evacuation", "arrest".
static func responder_outcome(call: Dictionary) -> String:
	var report: Dictionary = call.get("report", {})
	var danger: int = report.get("danger_level", 0)
	var weapons: bool = report.get("weapons_seen", false)
	if weapons or danger >= 3:
		return "arrest"
	if danger == 2:
		return "restraint"
	if call.get("type", "") == "emergency":
		return "evacuation"
	return "command"