extends SceneTree

## godot --path . --script res://tests/ui/capture_pixel_tower.gd
## THE_TREE_PIXEL_PLAY=1 keeps an interactive, disposable scenario open instead.
## THE_TREE_CAPTURE_SMOKE=1 validates the real scenario with --headless.
## Optional: THE_TREE_CAPTURE_PATH, WIDTH, HEIGHT, MINUTES, GAP_MINUTES, LAYER.
## THE_TREE_CAPTURE_ZOOM=1 (0.5..4); FOCUS_ROOMS=1 centers the built room area.
## THE_TREE_CAPTURE_ANIMATION=1 also saves 72 live frames at 12 fps.
## PATH names the first PNG; the second PNG and a state JSON use its basename.

const Scenario := preload("res://scripts/ui/pixel_tower_demo.gd")
const DEFAULT_PATH := "res://artifacts/pixel-tower/pixel-tower.png"

var _scenario: RefCounted
var _runtime: Variant
var _clock: Variant


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


func _run() -> void:
	_clock = root.get_node("GameClock")
	_runtime = root.get_node("SimulationRuntime")
	var state: Variant = root.get_node("GameState")
	_clock.reset(1, 6, 0)
	state.reset()
	# Disposable Demo fixture funds exact Doran signing_cost 300; DEFAULT5000 and paid hire stay unchanged.
	state.resources[&"gold"] += 300
	var initialized: Dictionary = _runtime.initialize(_clock, state, 424242)
	_clock.set_paused(true)
	_runtime.configure_save_policy({&"enabled": false, &"daily_checkpoint_enabled": false})
	if not bool(initialized.get(&"valid", false)):
		push_error("Could not initialize pixel viewing scenario.")
		quit(1)
		return
	_scenario = Scenario.new()
	if not await _scenario.prepare(_runtime, _clock, self):
		quit(1)
		return
	if not await _scenario.advance(_env_int("THE_TREE_CAPTURE_MINUTES", 83, 0, 180)):
		quit(1)
		return
	if OS.get_environment("THE_TREE_CAPTURE_SMOKE") == "1":
		print("PIXEL_SCENARIO ", JSON.stringify(_scenario.describe()))
		quit(0)
		return
	var capture_size := Vector2i(_env_int("THE_TREE_CAPTURE_WIDTH", 1440, 1024, 7680),
		_env_int("THE_TREE_CAPTURE_HEIGHT", 810, 640, 4320))
	var play := OS.get_environment("THE_TREE_PIXEL_PLAY") == "1"
	var container: Node = root
	var capture_viewport: SubViewport
	if play:
		root.size = capture_size
		root.title = "The Tree · ドット絵の見学（保存なし）"
	else:
		capture_viewport = SubViewport.new()
		capture_viewport.size = capture_size
		capture_viewport.render_target_update_mode = SubViewport.UPDATE_ALWAYS
		root.add_child(capture_viewport)
		container = capture_viewport
	var main := load("res://scenes/main/main.tscn").instantiate() as Control
	if main == null or not main.has_method("_set_layer"):
		push_error("Main scene did not load; run godot --headless --editor --path . --import first.")
		quit(ERR_CANT_ACQUIRE_RESOURCE)
		return
	container.add_child(main)
	main.set_anchors_and_offsets_preset(Control.PRESET_FULL_RECT)
	if main.get("world_preview") == null:
		push_error("Main scene failed to create the live world preview.")
		quit(ERR_CANT_ACQUIRE_RESOURCE)
		return
	# main enables its production save policy in _ready; immediately turn it off
	# for this disposable scenario and make the manual save/load controls inert.
	_runtime.configure_save_policy({&"enabled": false, &"daily_checkpoint_enabled": false})
	var load_menu := main.find_child("SaveLoadMenu", true, false) as MenuButton
	if load_menu != null:
		load_menu.disabled = true
		load_menu.tooltip_text = "この見学モードは保存・読込を行いません。"
	for button: Node in main.find_children("*", "Button", true, false):
		var save_control := button as Button
		for connection: Dictionary in save_control.pressed.get_connections():
			var callback: Callable = connection[&"callable"]
			if callback.get_method() in [&"_save_manual", &"_load_manual"]:
				save_control.disabled = true
				save_control.tooltip_text = "この見学モードは保存しません。"
	var layer := _env_int("THE_TREE_CAPTURE_LAYER", 0, 0, 1)
	main.call("_set_layer", layer)
	main.call("_clear_active_tool")
	for frame: int in 8:
		await process_frame
	var preview: Variant = main.get("world_preview")
	preview.set_zoom(_env_float("THE_TREE_CAPTURE_ZOOM", 1.0, 0.5, 4.0))
	if OS.get_environment("THE_TREE_CAPTURE_FOCUS_ROOMS") == "1":
		preview.pan_offset += preview.size * 0.5 - preview.cell_to_canvas(Vector3i(-2, 1, layer))
		preview.call("_clamp_pan")
		preview.queue_redraw()
	if play:
		main.call("_set_status", "ドット絵の見学：実際の客・従業員・建設済み施設で運営中（保存なし）", true, true)
		_clock.set_paused(false)
		print("PIXEL_PLAY: disposable scenario ready; normal saves are disabled.")
		return
	var path := OS.get_environment("THE_TREE_CAPTURE_PATH")
	if path.is_empty():
		path = DEFAULT_PATH
	var absolute_path := ProjectSettings.globalize_path(path)
	var directory_result := DirAccess.make_dir_recursive_absolute(absolute_path.get_base_dir())
	if directory_result != OK:
		push_error("Could not create capture directory.")
		quit(directory_result)
		return
	var records: Array[Dictionary] = []
	for index: int in 2:
		for frame: int in 8:
			await process_frame
		await RenderingServer.frame_post_draw
		var image := capture_viewport.get_texture().get_image()
		if image == null or image.is_empty():
			push_error("Capture needs a rendering display; use CAPTURE_SMOKE for headless validation.")
			quit(ERR_CANT_ACQUIRE_RESOURCE)
			return
		var output := absolute_path if index == 0 else absolute_path.get_basename() + "-later.png"
		var result := image.save_png(output)
		if result != OK:
			push_error("Could not write %s: %s" % [output, error_string(result)])
			quit(result)
			return
		var description: Dictionary = _scenario.describe()
		description["image"] = output
		description["tracked_actor_count"] = (preview.get("_actor_tracks") as Dictionary).size()
		description["viewport_size"] = [capture_size.x, capture_size.y]
		records.append(description)
		print("PIXEL_CAPTURE: %s at %s" % [output, _clock.formatted_time()])
		if index == 0 and not await _scenario.advance(_env_int("THE_TREE_CAPTURE_GAP_MINUTES", 18, 1, 180)):
			quit(1)
			return
	var animation: Dictionary = {}
	if OS.get_environment("THE_TREE_CAPTURE_ANIMATION") == "1":
		var frames_path := absolute_path.get_basename() + "-frames"
		var frames_directory_result := DirAccess.make_dir_recursive_absolute(frames_path)
		if frames_directory_result != OK:
			push_error("Could not create animation frames directory.")
			quit(frames_directory_result)
			return
		animation = {"directory": frames_path, "fps": 12, "frame_count": 72,
			"start": _scenario.describe()}
		_clock.set_speed(1)
		_clock.set_paused(false)
		main.call("_update_pause_and_speed")
		# Normal real-time processing owns the clock and actor movement here.
		# Never manually advance simulation ticks or animation time for a frame.
		for frame: int in 72:
			await create_timer(1.0 / 12.0).timeout
			await RenderingServer.frame_post_draw
			var frame_image := capture_viewport.get_texture().get_image()
			if frame_image == null or frame_image.is_empty():
				_clock.set_paused(true)
				push_error("Could not read a live animation frame.")
				quit(ERR_CANT_ACQUIRE_RESOURCE)
				return
			var frame_output := frames_path.path_join("%03d.png" % frame)
			var frame_result := frame_image.save_png(frame_output)
			if frame_result != OK:
				_clock.set_paused(true)
				push_error("Could not write %s: %s" % [frame_output, error_string(frame_result)])
				quit(frame_result)
				return
		_clock.set_paused(true)
		animation["end"] = _scenario.describe()
		print("PIXEL_ANIMATION: %s (72 frames at 12 fps)" % frames_path)
	var manifest := FileAccess.open(absolute_path.get_basename() + "-state.json", FileAccess.WRITE)
	if manifest == null:
		quit(FileAccess.get_open_error())
		return
	var manifest_data := {"scenario": "disposable production simulation", "captures": records}
	if not animation.is_empty():
		manifest_data["animation"] = animation
	manifest.store_string(JSON.stringify(manifest_data, "\t"))
	quit(0)


func _env_int(name: String, fallback: int, minimum: int, maximum: int) -> int:
	var value := OS.get_environment(name)
	return clampi(int(value), minimum, maximum) if value.is_valid_int() else fallback


func _env_float(name: String, fallback: float, minimum: float, maximum: float) -> float:
	var value := OS.get_environment(name)
	return clampf(float(value), minimum, maximum) if value.is_valid_float() else fallback