extends SceneTree

const SCENE_PATH := "res://main.tscn"
const DEBUG_OUTPUT_PATH := "res://docs/baselines/simulation_garden_01_debug.png"
const CINEMATIC_OUTPUT_PATH := "res://docs/baselines/simulation_garden_01_cinematic.png"
const CAPTURE_SIZE := Vector2i(1280, 720)
const WARMUP_FRAMES := 540


func _initialize() -> void:
	call_deferred("_run")


func _run() -> void:
	root.size = CAPTURE_SIZE
	var scene := load(SCENE_PATH) as PackedScene
	if scene == null:
		push_error("Could not load %s" % SCENE_PATH)
		quit(1)
		return

	var main_scene := scene.instantiate()
	var simulation_manager := main_scene.get_node("SimulationManager")
	simulation_manager.debug_logs = false

	root.add_child(main_scene)
	await process_frame
	_apply_capture_camera(main_scene)
	for _frame in WARMUP_FRAMES:
		await process_frame
	_apply_capture_camera(main_scene)

	var active_npcs := main_scene.get_node("ActiveNPCs")
	var demo_controller := main_scene.get_node("DemoController")
	if simulation_manager.npcs.is_empty() or active_npcs.get_child_count() == 0:
		push_error("Simulation Garden capture needs active NPCs")
		quit(1)
		return

	if demo_controller.has_method("toggle_debug_overlay"):
		if not demo_controller.debug_overlay_visible:
			demo_controller.toggle_debug_overlay()

	if not _stage_social_history(main_scene):
		quit(1)
		return
	await _stage_wind_gust(main_scene)
	await _settle_trust_reaction()
	var debug_analysis := _capture(DEBUG_OUTPUT_PATH)
	if debug_analysis.is_empty():
		quit(1)
		return

	if demo_controller.has_method("toggle_debug_overlay") and demo_controller.debug_overlay_visible:
		demo_controller.toggle_debug_overlay()
	if not _restart_trust_reaction(main_scene):
		quit(1)
		return
	await _stage_wind_gust(main_scene)
	await _settle_trust_reaction()

	var cinematic_analysis := _capture(CINEMATIC_OUTPUT_PATH)
	if cinematic_analysis.is_empty():
		quit(1)
		return

	print(
		(
			"[TOOL] Saved Simulation Garden captures | debug %s | cinematic %s"
			% [debug_analysis, cinematic_analysis]
		)
	)
	quit(0)


func _stage_social_history(main_scene: Node) -> bool:
	var simulation_manager := main_scene.get_node("SimulationManager")
	var world_view := main_scene.get_node("WorldViewManager")
	if simulation_manager.npcs.size() < 2:
		push_error("Simulation Garden social-history staging needs two NPCs")
		return false
	var contributor: SimNPC = simulation_manager.npcs[0]
	var observer: SimNPC = simulation_manager.npcs[1]
	var contributor_visual: Node3D = world_view.active_npc_visuals.get(contributor.id)
	var observer_visual: Node3D = world_view.active_npc_visuals.get(observer.id)
	if contributor_visual == null or observer_visual == null:
		push_error("Simulation Garden social-history staging needs both active NPC visuals")
		return false
	var relationship: RelationshipStateRecord = (
		simulation_manager.relationship_system.get_relationship(observer.id, contributor.id)
	)
	if relationship == null:
		push_error("Simulation Garden staging pair needs an existing directed relationship")
		return false
	var previous_trust := relationship.get_trust()
	simulation_manager.set_process(false)
	contributor_visual.set_physics_process(false)
	observer_visual.set_physics_process(false)
	observer_visual.global_position = contributor_visual.global_position + Vector3(1.0, 0.0, 0.0)
	simulation_manager.synchronize_npc_position(contributor.id, contributor_visual.global_position)
	simulation_manager.synchronize_npc_position(observer.id, observer_visual.global_position)
	observer.hunger = 85.0
	contributor.add_inventory(SimulationIds.RESOURCE_FOOD, 1.0)
	var deposited: float = simulation_manager.economy.deposit_inventory(
		contributor, SimulationIds.RESOURCE_FOOD
	)
	if not is_equal_approx(deposited, 1.0):
		push_error("Simulation Garden staging could not deposit one food")
		return false
	simulation_manager.emit_signal("village_changed", simulation_manager.village)
	var contributor_events: Array = simulation_manager.get_npc_events(contributor.id, 1)
	if contributor_events.is_empty():
		push_error("Simulation Garden staging did not record the deposit event")
		return false
	var deposit_event := contributor_events[0] as EconomicEventRecord
	var retained_memories: Array = simulation_manager.get_retained_memory_events(observer.id, 1)
	var reaction_root := observer_visual.get_node_or_null("TrustReactionRoot") as Node3D
	if (
		StringName(deposit_event.data["event_type"]) != SimulationIds.EVENT_STORAGE_DEPOSITED
		or relationship.get_trust() <= previous_trust
		or relationship.get_last_trust_cause_event_id() != int(deposit_event.data["event_id"])
		or retained_memories.is_empty()
		or retained_memories[0] != deposit_event
		or not simulation_manager.is_known_event_lasting(
			observer.id, int(deposit_event.data["event_id"])
		)
		or reaction_root == null
		or not reaction_root.visible
	):
		push_error("Simulation Garden staging did not produce the retained trust consequence")
		return false
	var village_ui := main_scene.get_node("UI")
	village_ui.selected_npc_index = simulation_manager.npcs.find(observer)
	village_ui.call("_refresh_npc_inspector")
	return true


func _restart_trust_reaction(main_scene: Node) -> bool:
	var simulation_manager := main_scene.get_node("SimulationManager")
	var world_view := main_scene.get_node("WorldViewManager")
	if simulation_manager.npcs.size() < 2:
		push_error("Simulation Garden trust-reaction staging needs two NPCs")
		return false
	var observer: SimNPC = simulation_manager.npcs[1]
	var observer_visual: Node3D = world_view.active_npc_visuals.get(observer.id)
	if observer_visual == null or not observer_visual.has_method("play_trust_gain_reaction"):
		push_error("Simulation Garden trust-reaction staging needs an active observer visual")
		return false
	observer_visual.play_trust_gain_reaction()
	return observer_visual.get_node("TrustReactionRoot").visible


func _stage_wind_gust(main_scene: Node) -> void:
	var gust_field := (
		main_scene.get_node_or_null("JajceWorld/AtmosphereRoot/WindGustField") as WindGustField
	)
	if gust_field == null:
		return
	gust_field.trigger_gust_at(Vector3(1.5, 0.0, -1.0), true, 0.5)
	for _frame in 2:
		await process_frame


func _settle_trust_reaction() -> void:
	for _frame in 12:
		await process_frame


func _capture(output_path: String) -> Dictionary:
	var image := root.get_texture().get_image()
	if image == null or image.is_empty():
		push_error("Simulation Garden capture produced no image")
		return {}

	var analysis := _analyze_image(image)
	if analysis.get("range", 0.0) < 0.05:
		push_error("Simulation Garden capture is too uniform: %s" % analysis)
		return {}

	var error := image.save_png(output_path)
	if error != OK:
		push_error("Could not save %s: %s" % [output_path, error_string(error)])
		return {}

	return analysis


func _analyze_image(image: Image) -> Dictionary:
	var min_luma := INF
	var max_luma := -INF
	var total_luma := 0.0
	var samples := 0
	var step_x = maxi(1, image.get_width() / 64)
	var step_y = maxi(1, image.get_height() / 36)

	for y in range(0, image.get_height(), step_y):
		for x in range(0, image.get_width(), step_x):
			var color := image.get_pixel(x, y)
			var luma := color.r * 0.2126 + color.g * 0.7152 + color.b * 0.0722
			min_luma = minf(min_luma, luma)
			max_luma = maxf(max_luma, luma)
			total_luma += luma
			samples += 1

	return {
		"size": "%sx%s" % [image.get_width(), image.get_height()],
		"samples": samples,
		"average_luma": total_luma / samples,
		"range": max_luma - min_luma,
	}


func _apply_capture_camera(main_scene: Node) -> void:
	var camera_rig := main_scene.get_node("CameraRig")
	if camera_rig.has_method("apply_presentation_preset"):
		camera_rig.pitch_degrees = -42.0
		camera_rig.apply_presentation_preset(Vector3(-2.0, 1.2, -0.5), 128.0, 0.95)
		camera_rig.set_physics_process(false)

	var camera := main_scene.get_node("CameraRig/Camera3D") as Camera3D
	camera.fov = 62.0