extends Node
## Interactive playtest driver for the real application (menu, match, HUD). It never touches the
## match state: every action is a real input event (mouse click, wheel, key) at window pixel
## coordinates, exactly as a player would give it. A tester writes command batches to files and
## gets a screenshot back after each batch:
##   /tmp/lune_play/cmd-<n>.txt   lines: click X Y · rclick X Y · move X Y · wheel X Y up|down ·
##                                key NAME · wait SECONDS · shot NAME
##   /tmp/lune_play/out-<n>.png   the screen after the batch; /tmp/lune_play/ok-<n> marks it done
## Hover (tooltips) follows the pointer of the batch: the control under it gets mouse_entered,
## because synthetic pointer moves do not move the OS cursor.
## A log of all commands with round and phase goes to docs/luneraria/logs/g3/playtest-log.txt.
## Run: godot --path . --resolution 1920x1080 res://tools/luneraria/g3_playtest.tscn
const DIR := "/tmp/lune_play/"
const LOG := "res://docs/luneraria/logs/g3/playtest-log.txt"

var main: Node
var next: int = 1
var busy: bool = false
var hovered: Control
var started: int = 0
var log_lines: PackedStringArray = []

func _ready() -> void:
	DirAccess.make_dir_recursive_absolute(DIR)
	for file: String in DirAccess.get_files_at(DIR):
		DirAccess.remove_absolute(DIR + file)
	main = load("res://scenes/luneraria.tscn").instantiate()
	add_child(main)
	started = Time.get_ticks_msec()
	print("PLAYTEST_READY")

func _process(_delta: float) -> void:
	if busy:
		return
	var path: String = DIR + "cmd-%d.txt" % next
	if not FileAccess.file_exists(path):
		return
	busy = true
	_run_batch(path, next)

func _run_batch(path: String, index: int) -> void:
	await get_tree().process_frame
	var text: String = FileAccess.get_file_as_string(path)
	for raw: String in text.split("\n"):
		var line: String = raw.strip_edges()
		if line.is_empty() or line.begins_with("#"):
			continue
		_log(index, line)
		await _command(line.split(" ", false))
	await get_tree().create_timer(.35).timeout
	await RenderingServer.frame_post_draw
	get_viewport().get_texture().get_image().save_png(DIR + "out-%d.png" % index)
	var marker := FileAccess.open(DIR + "ok-%d" % index, FileAccess.WRITE)
	marker.store_string(_status())
	marker.close()
	next = index + 1
	busy = false

func _status() -> String:
	var game: Node = main.get("game") if main != null else null
	if game == null or not is_instance_valid(game) or game.get("match_state") == null:
		return "menu"
	var state: LuneMatch = game.match_state
	return "round=%d phase=%s" % [state.round_number, ["PLANUNG", "KAMPF", "ENDE"][state.phase]]

func _log(index: int, line: String) -> void:
	var entry: String = "%7.1f s  #%d  [%s]  %s" % [(Time.get_ticks_msec() - started) / 1000.0, index, _status(), line]
	log_lines.append(entry)
	var file := FileAccess.open(LOG, FileAccess.WRITE)
	if file != null:
		file.store_string("\n".join(log_lines) + "\n")
		file.close()

func _command(parts: PackedStringArray) -> void:
	match parts[0]:
		"click", "rclick":
			var at := Vector2(float(parts[1]), float(parts[2]))
			await _move(at)
			for pressed: bool in [true, false]:
				_button(at, MOUSE_BUTTON_LEFT if parts[0] == "click" else MOUSE_BUTTON_RIGHT, pressed)
				await get_tree().process_frame
		"move":
			await _move(Vector2(float(parts[1]), float(parts[2])))
		"wheel":
			var at := Vector2(float(parts[1]), float(parts[2]))
			await _move(at)
			for pressed: bool in [true, false]:
				_button(at, MOUSE_BUTTON_WHEEL_UP if parts.size() < 4 or parts[3] == "up" else MOUSE_BUTTON_WHEEL_DOWN, pressed)
			await get_tree().process_frame
		"key":
			var code: Key = OS.find_keycode_from_string(parts[1])
			for pressed: bool in [true, false]:
				var event := InputEventKey.new()
				event.keycode = code
				event.physical_keycode = code
				event.pressed = pressed
				Input.parse_input_event(event)
				await get_tree().process_frame
		"wait":
			await get_tree().create_timer(float(parts[1])).timeout
		"shot":
			await RenderingServer.frame_post_draw
			get_viewport().get_texture().get_image().save_png(DIR + parts[1] + ".png")
		"quit":
			get_tree().quit()

## Window pixels → the same path as a real mouse (Input), so GUI and game see one event.
func _button(at: Vector2, button: int, pressed: bool) -> void:
	var event := InputEventMouseButton.new()
	event.button_index = button
	event.position = at
	event.global_position = at
	event.pressed = pressed
	Input.parse_input_event(event)

func _move(at: Vector2) -> void:
	var motion := InputEventMouseMotion.new()
	motion.position = at
	motion.global_position = at
	Input.parse_input_event(motion)
	await get_tree().process_frame
	_hover(at)

## The topmost visible control under the pointer that takes mouse input gets mouse_entered.
func _hover(at: Vector2) -> void:
	var canvas: Vector2 = get_viewport().get_screen_transform().affine_inverse() * at
	var found: Control = null
	for node: Node in get_tree().root.find_children("*", "Control", true, false):
		var control := node as Control
		if control.mouse_filter == Control.MOUSE_FILTER_IGNORE or not control.is_visible_in_tree():
			continue
		if control.get_global_rect().has_point(canvas):
			found = control
	if found == hovered:
		return
	if hovered != null and is_instance_valid(hovered):
		hovered.mouse_exited.emit()
	hovered = found
	if found != null:
		found.mouse_entered.emit()