class_name CockpitInstrumentPanel
extends Node3D

const DiveUpdate = preload("res://game/domain/dive/dive_update.gd")
const DiveAlertLevel = preload("res://game/domain/dive/dive_alert_level.gd")
const ReturnEstimate = preload("res://game/domain/dive/return_estimate.gd")
const VehicleTelemetry = preload("res://game/application/dive/vehicle_telemetry.gd")
const CockpitDetailing = preload(
	"res://game/presentation/cockpit/cockpit_detailing.gd"
)

const COLOR_NORMAL := Color(0.45, 0.89, 0.90, 1.0)
const COLOR_ATTENTION := Color(1.0, 0.75, 0.20, 1.0)
const COLOR_CRITICAL := Color(1.0, 0.42, 0.31, 1.0)
## 1.0 shows the sonar picture as rendered; slightly above lets its brightest
## lines bloom without clipping the surface colours.
const SONAR_SCREEN_ENERGY := 1.25

@onready var _resources_label: Label3D = %ResourcesLabel
@onready var _navigation_label: Label3D = %NavigationLabel
@onready var _integrity_label: Label3D = %IntegrityLabel
@onready var _return_label: Label3D = %ReturnLabel
@onready var _status_label: Label3D = %StatusLabel
@onready var _sonar_screen: MeshInstance3D = %SonarScreen
@onready var _sonar_placeholder: Label3D = %SonarPlaceholder
@onready var _detailing: CockpitDetailing = %CockpitDetailing

var _sonar_texture: Texture2D


func present(update: DiveUpdate, telemetry: VehicleTelemetry) -> void:
	if update == null or update.snapshot == null or telemetry == null:
		return
	var snapshot = update.snapshot
	_resources_label.text = (
		"BAT %.1f kWh · O₂ %.0f %%\n%.0f kW · %.1f L/min"
		% [
			snapshot.battery.remaining_kwh,
			snapshot.oxygen.ratio * 100.0,
			snapshot.battery.current_power_kw,
			snapshot.oxygen.consumption_l_per_min,
		]
	)
	_navigation_label.text = (
		"PROF. %.1f / %.1f m\nVIT. %.2f m/s"
		% [
			snapshot.depth.current_m,
			snapshot.depth.certified_m,
			telemetry.world_linear_velocity_mps.length(),
		]
	)
	_integrity_label.text = (
		"COQUE %.0f %% · %.2f bar\nLIMITE %.2f bar"
		% [
			snapshot.hull.ratio * 100.0,
			snapshot.hull.exterior_pressure_bar,
			snapshot.hull.certified_pressure_bar,
		]
	)
	_return_label.text = _return_text(snapshot.return_estimate)
	_status_label.text = "SYSTÈMES · %s" % _alert_text(snapshot.alerts.maximum)
	_resources_label.modulate = _alert_color(
		maxi(snapshot.alerts.battery, snapshot.alerts.oxygen)
	)
	_integrity_label.modulate = _alert_color(
		maxi(snapshot.alerts.hull, snapshot.alerts.depth)
	)
	_status_label.modulate = _alert_color(snapshot.alerts.maximum)
	_detailing.present(update, telemetry)


func resources_text() -> String:
	return _resources_label.text


func navigation_text() -> String:
	return _navigation_label.text


func integrity_text() -> String:
	return _integrity_label.text


func return_text() -> String:
	return _return_label.text


func attach_sonar_texture(texture: Texture2D) -> void:
	_sonar_texture = texture
	# The glass shows the picture by emission only: black albedo, no specular,
	# so cabin lights add nothing to it, and the energy can lift the brightest
	# lines just above 1.0 for the environment glow to pick up.
	var material := StandardMaterial3D.new()
	material.albedo_color = Color.BLACK
	material.metallic_specular = 0.0
	material.roughness = 1.0
	material.emission_enabled = true
	material.emission = Color.WHITE
	material.emission_operator = BaseMaterial3D.EMISSION_OP_MULTIPLY
	material.emission_texture = texture
	material.emission_energy_multiplier = SONAR_SCREEN_ENERGY
	_sonar_screen.material_override = material
	_sonar_placeholder.visible = false


func sonar_texture() -> Texture2D:
	return _sonar_texture


func detailing() -> CockpitDetailing:
	return _detailing


func _return_text(estimate: ReturnEstimate) -> String:
	match estimate.status:
		ReturnEstimate.Status.SAFE:
			return "RETOUR %.1f kWh · MARGE %.1f kWh" % [
				estimate.required_kwh,
				estimate.margin_kwh,
			]
		ReturnEstimate.Status.TIGHT:
			return "RETOUR SERRÉ · MARGE %.1f kWh" % estimate.margin_kwh
		ReturnEstimate.Status.INSUFFICIENT:
			return "RETOUR INSUFFISANT · MANQUE %.1f kWh" % absf(
				estimate.margin_kwh
			)
	return "RETOUR · INCONNU"


func _alert_text(level: DiveAlertLevel.Value) -> String:
	match level:
		DiveAlertLevel.Value.NORMAL:
			return "NORMAL"
		DiveAlertLevel.Value.ATTENTION:
			return "ATTENTION"
		DiveAlertLevel.Value.RETURN:
			return "RETOUR"
		DiveAlertLevel.Value.CRITICAL:
			return "CRITIQUE"
		DiveAlertLevel.Value.FAILURE:
			return "DÉFAILLANCE"
	return "INCONNU"


func _alert_color(level: DiveAlertLevel.Value) -> Color:
	if level >= DiveAlertLevel.Value.CRITICAL:
		return COLOR_CRITICAL
	if level >= DiveAlertLevel.Value.ATTENTION:
		return COLOR_ATTENTION
	return COLOR_NORMAL