extends Node

@warning_ignore("unused_signal")
signal on_game_paused
@warning_ignore("unused_signal")
signal on_game_resumed
@warning_ignore("unused_signal")
signal on_photo_highlighted(teture: Texture)
@warning_ignore("unused_signal")
signal on_enable_photo_mode_request
@warning_ignore("unused_signal")
signal on_disable_photo_mode_request
@warning_ignore("unused_signal")
signal on_photo_taken_prepare
@warning_ignore("unused_signal")
signal on_photo_taken_started
@warning_ignore("unused_signal")
signal on_photo_taken_making
@warning_ignore("unused_signal")
signal on_photo_taken_finished
@warning_ignore("unused_signal")
signal on_photo_mode_black_screen_disappeared

const SAVE_PATH: String = "user://savegame.json"
const SAVE_PASSWORD: String = "jmpgames_megapwd"

var save_data: SaveGameData = SaveGameData.new()
var is_loaded: bool = false

func _ready() -> void:
	load_game()
	apply_video_settings()
	apply_train_colors()

func _process(delta: float) -> void:
	if not get_tree().paused and is_loaded:
		save_data.total_time_played_seconds += delta

func apply_video_settings() -> void:
	get_viewport().use_taa = save_data.anti_aliasing
	var msaa_mode = Viewport.MSAA_2X if save_data.anti_aliasing else Viewport.MSAA_DISABLED
	get_viewport().msaa_3d = msaa_mode
	get_viewport().msaa_2d = Viewport.MSAA_DISABLED
	
	match save_data.window_mode_index:
		0:
			DisplayServer.window_set_mode(DisplayServer.WINDOW_MODE_EXCLUSIVE_FULLSCREEN)
		1:
			DisplayServer.window_set_mode(DisplayServer.WINDOW_MODE_FULLSCREEN)
		2:
			DisplayServer.window_set_mode(DisplayServer.WINDOW_MODE_WINDOWED)
			DisplayServer.window_set_flag(DisplayServer.WINDOW_FLAG_BORDERLESS, false)

	if save_data.window_mode_index == 2 and save_data.resolution_x > 0 and save_data.resolution_y > 0:
		DisplayServer.window_set_size(Vector2i(save_data.resolution_x, save_data.resolution_y))
		
		# Optional: center the window if resized
		var screen_position: Vector2i = DisplayServer.screen_get_position()
		var screen_size: Vector2i = DisplayServer.screen_get_size()
		var window_size: Vector2i = DisplayServer.window_get_size()
		var screen_center := screen_position + Vector2i(
			floori(float(screen_size.x) / 2.0),
			floori(float(screen_size.y) / 2.0)
		)
		var window_half_size := Vector2i(
			floori(float(window_size.x) / 2.0),
			floori(float(window_size.y) / 2.0)
		)
		DisplayServer.window_set_position(screen_center - window_half_size)

func apply_train_colors() -> void:
	if not save_data.train_color_1.is_empty():
		var mat1: ShaderMaterial = load("res://tgcc/train/Color1_train.tres")
		if mat1:
			mat1.set_shader_parameter("albedo_color", Color(save_data.train_color_1))
	if not save_data.train_color_2.is_empty():
		var mat2: ShaderMaterial = load("res://tgcc/train/Color2_train.tres")
		if mat2:
			mat2.set_shader_parameter("albedo_color", Color(save_data.train_color_2))

#encrypted file + binary serialization (standard)
func load_game() -> void:
	if not FileAccess.file_exists(SAVE_PATH):
		save_data = SaveGameData.new()
		is_loaded = true
		return

	var file := FileAccess.open_encrypted_with_pass(SAVE_PATH, FileAccess.READ, SAVE_PASSWORD)
	save_data = SaveGameData.new()
	if file != null:
		var data = file.get_var()
		file.close()
		if data is Dictionary:
			save_data = SaveGameData.from_dictionary(data)
	#if file == null the key or the file is corrupted -> start with new data
	is_loaded = true
	
	
func save_game() -> void:
	var file := FileAccess.open_encrypted_with_pass(SAVE_PATH, FileAccess.WRITE, SAVE_PASSWORD)
	if file == null:
		push_error("Salvataggio fallito: %s" % FileAccess.get_open_error())
		return
	file.store_var(save_data.to_dictionary())  # binario, non JSON
	file.close()

#JSon Version
#func save_game() -> void:
	#var save_file = FileAccess.open(SAVE_PATH, FileAccess.WRITE)
	#var json_string = JSON.stringify(save_data.to_dictionary())
	#save_file.store_line(json_string)
#
#func load_game() -> void:
	#if not FileAccess.file_exists(SAVE_PATH):
		#save_data = SaveGameData.new()
		#is_loaded = true
		#return
		#
	#var file = FileAccess.open(SAVE_PATH, FileAccess.READ)
	#var json_string = file.get_as_text()
	#
	#var json = JSON.new()
	#var parse_result = json.parse(json_string)
	#
	#save_data = SaveGameData.new()
	#if parse_result == OK and json.data is Dictionary:
		#save_data = SaveGameData.from_dictionary(json.data)
	#
	#is_loaded = true

func pause_game() -> void:
	get_tree().paused = true

func resume_game() -> void:
	get_tree().paused = false

func quit_game() -> void:
	SceneManager.quit_game()