# gdlint: ignore=max-public-methods
extends Node

var current_save_paths := []  # Array of strings
# Stores a filename of a backup file in user:// until user saves manually
var backup_save_paths := []  # Array of strings
var preview_dialog_tscn = preload("res://src/UI/Dialogs/PreviewDialog.tscn")
var preview_dialogs := []  # Array of preview dialogs
var last_dialog_option: int = 0

onready var autosave_timer: Timer


func _ready() -> void:
	autosave_timer = Timer.new()
	autosave_timer.one_shot = false
	autosave_timer.process_mode = Timer.TIMER_PROCESS_IDLE
	autosave_timer.connect("timeout", self, "_on_Autosave_timeout")
	add_child(autosave_timer)
	update_autosave()


func handle_loading_file(file: String) -> void:
	file = file.replace("\\", "/")
	var file_ext: String = file.get_extension().to_lower()
	if file_ext == "pxo":  # Pixelorama project file
		open_pxo_file(file)

	elif file_ext == "tres":  # Godot resource file
		var resource = load(file)
		if resource is Palette:
			Palettes.import_palette(resource, file.get_file())
		else:
			var file_name: String = file.get_file()
			Global.error_dialog.set_text(tr("Can't load file '%s'.") % [file_name])
			Global.error_dialog.popup_centered()
			Global.dialog_open(true)

	elif file_ext == "gpl" or file_ext == "pal" or file_ext == "json":
		Palettes.import_palette_from_path(file)

	elif file_ext in ["pck", "zip"]:  # Godot resource pack file
		Global.preferences_dialog.extensions.install_extension(file)

	elif file_ext == "shader" or file_ext == "gdshader":  # Godot shader file
		var shader = load(file)
		if !shader is Shader:
			return
		var file_name: String = file.get_file().get_basename()
		Global.control.find_node("ShaderEffect").change_shader(shader, file_name)

	else:  # Image files
		# Attempt to load as APNG.
		# Note that the APNG importer will *only* succeed for *animated* PNGs.
		# This is intentional as still images should still act normally.
		var apng_res := AImgIOAPNGImporter.load_from_file(file)
		if apng_res[0] == null:
			# No error - this is an APNG!
			handle_loading_aimg(file, apng_res[1])
			return
		# Attempt to load as a regular image.
		var image := Image.new()
		var err := image.load(file)
		if err != OK:  # An error occurred
			var file_name: String = file.get_file()
			Global.error_dialog.set_text(
				(
					tr("Can't load file '%s'.\nError code: %s")
					% [file_name, str(err, ErrorManager.parse(err, " (", ")"))]
				)
			)
			Global.error_dialog.popup_centered()
			Global.dialog_open(true)
			return
		handle_loading_image(file, image)


func handle_loading_image(file: String, image: Image) -> void:
	var preview_dialog: ConfirmationDialog = preview_dialog_tscn.instance()
	preview_dialogs.append(preview_dialog)
	preview_dialog.path = file
	preview_dialog.image = image
	Global.control.add_child(preview_dialog)
	preview_dialog.popup_centered()
	Global.dialog_open(true)


# For loading the output of AImgIO as a project
func handle_loading_aimg(path: String, frames: Array) -> void:
	var project := Project.new([], path.get_file(), frames[0].content.get_size())
	project.layers.append(PixelLayer.new(project))
	Global.projects.append(project)

	# Determine FPS as 1, unless all frames agree.
	project.fps = 1
	var first_duration = frames[0].duration
	var frames_agree = true
	for v in frames:
		var aimg_frame: AImgIOFrame = v
		if aimg_frame.duration != first_duration:
			frames_agree = false
			break
	if frames_agree and (first_duration > 0.0):
		project.fps = 1.0 / first_duration
	# Convert AImgIO frames to Pixelorama frames
	for v in frames:
		var aimg_frame: AImgIOFrame = v
		var frame := Frame.new()
		if not frames_agree:
			frame.duration = aimg_frame.duration * project.fps
		var content := aimg_frame.content
		content.convert(Image.FORMAT_RGBA8)
		frame.cels.append(PixelCel.new(content, 1))
		project.frames.append(frame)

	set_new_imported_tab(project, path)


func open_pxo_file(path: String, untitled_backup: bool = false, replace_empty: bool = true) -> void:
	var file := File.new()
	var err := file.open_compressed(path, File.READ, File.COMPRESSION_ZSTD)
	if err == ERR_FILE_UNRECOGNIZED:
		err = file.open(path, File.READ)  # If the file is not compressed open it raw (pre-v0.7)

	if err != OK:
		Global.error_dialog.set_text(
			tr("File failed to open. Error code %s") % str(err, ErrorManager.parse(err, " (", ")"))
		)
		Global.error_dialog.popup_centered()
		Global.dialog_open(true)
		file.close()
		return

	var empty_project: bool = Global.current_project.is_empty() and replace_empty
	var new_project: Project
	if empty_project:
		new_project = Global.current_project
		new_project.frames = []
		new_project.layers = []
		new_project.animation_tags.clear()
		new_project.name = path.get_file()
	else:
		new_project = Project.new([], path.get_file())

	var first_line := file.get_line()
	var dict := JSON.parse(first_line)
	if dict.error != OK:
		open_old_pxo_file(file, new_project, first_line)
	else:
		if typeof(dict.result) != TYPE_DICTIONARY:
			print("Error, json parsed result is: %s" % typeof(dict.result))
			file.close()
			return

		new_project.deserialize(dict.result)
		for frame in new_project.frames:
			for cel in frame.cels:
				cel.load_image_data_from_pxo(file, new_project.size)

		if dict.result.has("brushes"):
			for brush in dict.result.brushes:
				var b_width = brush.size_x
				var b_height = brush.size_y
				var buffer := file.get_buffer(b_width * b_height * 4)
				var image := Image.new()
				image.create_from_data(b_width, b_height, false, Image.FORMAT_RGBA8, buffer)
				new_project.brushes.append(image)
				Brushes.add_project_brush(image)

		if dict.result.has("tile_mask") and dict.result.has("has_mask"):
			if dict.result.has_mask:
				var t_width = dict.result.tile_mask.size_x
				var t_height = dict.result.tile_mask.size_y
				var buffer := file.get_buffer(t_width * t_height * 4)
				var image := Image.new()
				image.create_from_data(t_width, t_height, false, Image.FORMAT_RGBA8, buffer)
				new_project.tiles.tile_mask = image
			else:
				new_project.tiles.reset_mask()

	file.close()
	if empty_project:
		new_project.change_project()
		Global.emit_signal("project_changed")
		Global.emit_signal("cel_changed")
	else:
		Global.projects.append(new_project)
		Global.tabs.current_tab = Global.tabs.get_tab_count() - 1
	Global.canvas.camera_zoom()

	if not untitled_backup:
		# Untitled backup should not change window title and save path
		current_save_paths[Global.current_project_index] = path
		Global.window_title = path.get_file() + " - Pixelorama " + Global.current_version
		Global.save_sprites_dialog.current_path = path
		# Set last opened project path and save
		Global.config_cache.set_value("preferences", "last_project_path", path)
		Global.config_cache.save("user://cache.ini")
		new_project.directory_path = path.get_base_dir()
		new_project.file_name = path.get_file().trim_suffix(".pxo")
		new_project.was_exported = false
		Global.top_menu_container.file_menu.set_item_text(
			Global.FileMenu.SAVE, tr("Save") + " %s" % path.get_file()
		)
		Global.top_menu_container.file_menu.set_item_text(Global.FileMenu.EXPORT, tr("Export"))

	save_project_to_recent_list(path)


# For pxo files older than v0.8
func open_old_pxo_file(file: File, new_project: Project, first_line: String) -> void:
#	var file_version := file.get_line() # Example, "v0.7.10-beta"
	var file_version := first_line
	var file_ver_splitted := file_version.split("-")
	var file_ver_splitted_numbers := file_ver_splitted[0].split(".")

	# In the above example, the major version would return "0",
	# the minor version would return "7", the patch "10"
	# and the status would return "beta"
	var file_major_version := int(file_ver_splitted_numbers[0].replace("v", ""))
	var file_minor_version := int(file_ver_splitted_numbers[1])
	var file_patch_version := 0

	if file_ver_splitted_numbers.size() > 2:
		file_patch_version = int(file_ver_splitted_numbers[2])

	if file_major_version == 0 and file_minor_version < 5:
		Global.notification_label(
			"File is from an older version of Pixelorama, as such it might not work properly"
		)

	var new_guides := true
	if file_major_version == 0:
		if file_minor_version < 7 or (file_minor_version == 7 and file_patch_version == 0):
			new_guides = false

	var frame := 0

	var layer_dicts := []
	if file_major_version >= 0 and file_minor_version > 6:
		var global_layer_line := file.get_line()
		while global_layer_line == ".":
			layer_dicts.append(
				{
					"name": file.get_line(),
					"visible": file.get_8(),
					"locked": file.get_8(),
					"new_cels_linked": file.get_8(),
					"linked_cels": file.get_var()
				}
			)
			var l := PixelLayer.new(new_project)
			l.index = new_project.layers.size()
			new_project.layers.append(l)
			global_layer_line = file.get_line()

	var frame_line := file.get_line()
	while frame_line == "--":  # Load frames
		var frame_class := Frame.new()
		var width := file.get_16()
		var height := file.get_16()

		var layer_i := 0
		var layer_line := file.get_line()
		while layer_line == "-":  # Load layers
			var buffer := file.get_buffer(width * height * 4)
			if file_major_version == 0 and file_minor_version < 7:
				var layer_name_old_version = file.get_line()
				if frame == 0:
					var l := PixelLayer.new(new_project, layer_name_old_version)
					l.index = layer_i
					new_project.layers.append(l)
			var cel_opacity := 1.0
			if file_major_version >= 0 and file_minor_version > 5:
				cel_opacity = file.get_float()
			var image := Image.new()
			image.create_from_data(width, height, false, Image.FORMAT_RGBA8, buffer)
			frame_class.cels.append(PixelCel.new(image, cel_opacity))
			layer_i += 1
			layer_line = file.get_line()

		if !new_guides:
			var guide_line := file.get_line()  # "guideline" no pun intended
			while guide_line == "|":  # Load guides
				var guide := Guide.new()
				guide.type = file.get_8()
				if guide.type == guide.Types.HORIZONTAL:
					guide.add_point(Vector2(-99999, file.get_16()))
					guide.add_point(Vector2(99999, file.get_16()))
				else:
					guide.add_point(Vector2(file.get_16(), -99999))
					guide.add_point(Vector2(file.get_16(), 99999))
				guide.has_focus = false
				Global.canvas.add_child(guide)
				new_project.guides.append(guide)
				guide_line = file.get_line()

		new_project.size = Vector2(width, height)
		new_project.frames.append(frame_class)
		frame_line = file.get_line()
		frame += 1

	if layer_dicts:
		for layer_i in new_project.layers.size():
			# Now that we have the layers, frames, and cels, deserialize layer data
			new_project.layers[layer_i].deserialize(layer_dicts[layer_i])

	if new_guides:
		var guide_line := file.get_line()  # "guideline" no pun intended
		while guide_line == "|":  # Load guides
			var guide := Guide.new()
			guide.type = file.get_8()
			if guide.type == guide.Types.HORIZONTAL:
				guide.add_point(Vector2(-99999, file.get_16()))
				guide.add_point(Vector2(99999, file.get_16()))
			else:
				guide.add_point(Vector2(file.get_16(), -99999))
				guide.add_point(Vector2(file.get_16(), 99999))
			guide.has_focus = false
			Global.canvas.add_child(guide)
			new_project.guides.append(guide)
			guide_line = file.get_line()

	# Load tool options
	file.get_var()
	file.get_var()
	file.get_8()
	file.get_8()
	if file_major_version == 0 and file_minor_version < 7:
		file.get_var()
		file.get_var()

	# Load custom brushes
	var brush_line := file.get_line()
	while brush_line == "/":
		var b_width := file.get_16()
		var b_height := file.get_16()
		var buffer := file.get_buffer(b_width * b_height * 4)
		var image := Image.new()
		image.create_from_data(b_width, b_height, false, Image.FORMAT_RGBA8, buffer)
		new_project.brushes.append(image)
		Brushes.add_project_brush(image)
		brush_line = file.get_line()

	if file_major_version >= 0 and file_minor_version > 6:
		var tag_line := file.get_line()
		while tag_line == ".T/":
			var tag_name := file.get_line()
			var tag_color: Color = file.get_var()
			var tag_from := file.get_8()
			var tag_to := file.get_8()
			new_project.animation_tags.append(
				AnimationTag.new(tag_name, tag_color, tag_from, tag_to)
			)
			new_project.animation_tags = new_project.animation_tags  # To execute animation_tags_changed()
			tag_line = file.get_line()


func save_pxo_file(
	path: String,
	autosave: bool,
	use_zstd_compression := true,
	project: Project = Global.current_project
) -> void:
	if !autosave:
		project.name = path.get_file()
	var serialized_data := project.serialize()
	if !serialized_data:
		Global.error_dialog.set_text(
			tr("File failed to save. Converting project data to dictionary failed.")
		)
		Global.error_dialog.popup_centered()
		Global.dialog_open(true)
		return
	var to_save := JSON.print(serialized_data)
	if !to_save:
		Global.error_dialog.set_text(
			tr("File failed to save. Converting dictionary to JSON failed.")
		)
		Global.error_dialog.popup_centered()
		Global.dialog_open(true)
		return

	# Check if a file with the same name exists. If it does, rename the new file temporarily.
	# Needed in case of a crash, so that the old file won't be replaced with an empty one.
	var temp_path := path
	var dir := Directory.new()
	if dir.file_exists(path):
		temp_path = path + "1"

	var file := File.new()
	var err: int
	if use_zstd_compression:
		err = file.open_compressed(temp_path, File.WRITE, File.COMPRESSION_ZSTD)
	else:
		err = file.open(temp_path, File.WRITE)

	if err != OK:
		if temp_path.is_valid_filename():
			return
		Global.error_dialog.set_text(
			tr("File failed to save. Error code %s") % str(err, ErrorManager.parse(err, " (", ")"))
		)
		Global.error_dialog.popup_centered()
		Global.dialog_open(true)
		file.close()
		return

	if !autosave:
		current_save_paths[Global.current_project_index] = path

	file.store_line(to_save)
	for frame in project.frames:
		for cel in frame.cels:
			cel.save_image_data_to_pxo(file)
	for brush in project.brushes:
		file.store_buffer(brush.get_data())
	if project.tiles.has_mask:
		file.store_buffer(project.tiles.tile_mask.get_data())

	file.close()

	if temp_path != path:
		# Rename the new file to its proper name and remove the old file, if it exists.
		dir.rename(temp_path, path)

	if OS.get_name() == "HTML5" and OS.has_feature("JavaScript") and !autosave:
		err = file.open(path, File.READ)
		if err == OK:
			var file_data := Array(file.get_buffer(file.get_len()))
			JavaScript.download_buffer(file_data, path.get_file())
		file.close()
		# Remove the .pxo file from memory, as we don't need it anymore
		var browser_dir := Directory.new()
		browser_dir.remove(path)

	if autosave:
		Global.notification_label("File autosaved")
	else:
		# First remove backup then set current save path
		if project.has_changed:
			project.has_changed = false
		remove_backup(Global.current_project_index)
		Global.notification_label("File saved")
		Global.window_title = path.get_file() + " - Pixelorama " + Global.current_version

		# Set last opened project path and save
		Global.config_cache.set_value("preferences", "last_project_path", path)
		Global.config_cache.save("user://cache.ini")
		if !project.was_exported:
			project.file_name = path.get_file().trim_suffix(".pxo")
			project.directory_path = path.get_base_dir()
		Global.top_menu_container.file_menu.set_item_text(
			Global.FileMenu.SAVE, tr("Save") + " %s" % path.get_file()
		)

	save_project_to_recent_list(path)


func open_image_as_new_tab(path: String, image: Image) -> void:
	var project := Project.new([], path.get_file(), image.get_size())
	project.layers.append(PixelLayer.new(project))
	Global.projects.append(project)

	var frame := Frame.new()
	image.convert(Image.FORMAT_RGBA8)
	frame.cels.append(PixelCel.new(image, 1))

	project.frames.append(frame)
	set_new_imported_tab(project, path)


func open_image_as_spritesheet_tab(path: String, image: Image, horiz: int, vert: int) -> void:
	var project := Project.new([], path.get_file())
	project.layers.append(PixelLayer.new(project))
	Global.projects.append(project)
	horiz = min(horiz, image.get_size().x)
	vert = min(vert, image.get_size().y)
	var frame_width := image.get_size().x / horiz
	var frame_height := image.get_size().y / vert
	for yy in range(vert):
		for xx in range(horiz):
			var frame := Frame.new()
			var cropped_image := Image.new()
			cropped_image = image.get_rect(
				Rect2(frame_width * xx, frame_height * yy, frame_width, frame_height)
			)
			project.size = cropped_image.get_size()
			cropped_image.convert(Image.FORMAT_RGBA8)
			frame.cels.append(PixelCel.new(cropped_image, 1))
			project.frames.append(frame)
	set_new_imported_tab(project, path)


func open_image_as_spritesheet_layer(
	_path: String, image: Image, file_name: String, horizontal: int, vertical: int, start_frame: int
) -> void:
	# Data needed to slice images
	horizontal = min(horizontal, image.get_size().x)
	vertical = min(vertical, image.get_size().y)
	var frame_width := image.get_size().x / horizontal
	var frame_height := image.get_size().y / vertical

	# Resize canvas to if "frame_width" or "frame_height" is too large
	var project: Project = Global.current_project
	var project_width: int = max(frame_width, project.size.x)
	var project_height: int = max(frame_height, project.size.y)
	if project.size < Vector2(project_width, project_height):
		DrawingAlgos.resize_canvas(project_width, project_height, 0, 0)

	# Initialize undo mechanism
	project.undos += 1
	project.undo_redo.create_action("Add Spritesheet Layer")

	# Create new frames (if needed)
	var new_frames_size = max(project.frames.size(), start_frame + (vertical * horizontal))
	var frames := []
	var frame_indices := []
	if new_frames_size > project.frames.size():
		var required_frames = new_frames_size - project.frames.size()
		frame_indices = range(
			project.current_frame + 1, project.current_frame + required_frames + 1
		)
		for i in required_frames:
			var new_frame := Frame.new()
			for l in range(project.layers.size()):  # Create as many cels as there are layers
				new_frame.cels.append(project.layers[l].new_empty_cel())
				if project.layers[l].new_cels_linked:
					var prev_cel: BaseCel = project.frames[project.current_frame].cels[l]
					if prev_cel.link_set == null:
						prev_cel.link_set = {}
						project.undo_redo.add_do_method(
							project.layers[l], "link_cel", prev_cel, prev_cel.link_set
						)
						project.undo_redo.add_undo_method(
							project.layers[l], "link_cel", prev_cel, null
						)
					new_frame.cels[l].set_content(prev_cel.get_content(), prev_cel.image_texture)
					new_frame.cels[l].link_set = prev_cel.link_set
			frames.append(new_frame)

	# Create new layer for spritesheet
	var layer := PixelLayer.new(project, file_name)
	var cels := []
	for f in new_frames_size:
		if f >= start_frame and f < (start_frame + (vertical * horizontal)):
			# Slice spritesheet
			var xx: int = (f - start_frame) % horizontal
			var yy: int = (f - start_frame) / horizontal
			var cropped_image := Image.new()
			cropped_image = image.get_rect(
				Rect2(frame_width * xx, frame_height * yy, frame_width, frame_height)
			)
			cropped_image.crop(project.size.x, project.size.y)
			cropped_image.convert(Image.FORMAT_RGBA8)
			cels.append(PixelCel.new(cropped_image))
		else:
			cels.append(layer.new_empty_cel())

	project.undo_redo.add_do_method(project, "add_frames", frames, frame_indices)
	project.undo_redo.add_do_method(project, "add_layers", [layer], [project.layers.size()], [cels])
	project.undo_redo.add_do_method(
		project, "change_cel", new_frames_size - 1, project.layers.size()
	)
	project.undo_redo.add_do_method(Global, "undo_or_redo", false)

	project.undo_redo.add_undo_method(project, "remove_layers", [project.layers.size()])
	project.undo_redo.add_undo_method(project, "remove_frames", frame_indices)
	project.undo_redo.add_undo_method(
		project, "change_cel", project.current_frame, project.current_layer
	)
	project.undo_redo.add_undo_method(Global, "undo_or_redo", true)
	project.undo_redo.commit_action()


func open_image_at_cel(image: Image, layer_index := 0, frame_index := 0) -> void:
	var project: Project = Global.current_project
	var project_width: int = max(image.get_width(), project.size.x)
	var project_height: int = max(image.get_height(), project.size.y)
	if project.size < Vector2(project_width, project_height):
		DrawingAlgos.resize_canvas(project_width, project_height, 0, 0)
	project.undos += 1
	project.undo_redo.create_action("Replaced Cel")

	for i in project.frames.size():
		if i == frame_index:
			image.convert(Image.FORMAT_RGBA8)
			var cel: PixelCel = project.frames[i].cels[layer_index]
			project.undo_redo.add_do_property(cel, "image", image)
			project.undo_redo.add_undo_property(cel, "image", cel.image)

	project.undo_redo.add_do_property(project, "selected_cels", [])
	project.undo_redo.add_do_method(project, "change_cel", frame_index, layer_index)
	project.undo_redo.add_do_method(Global, "undo_or_redo", false)

	project.undo_redo.add_undo_property(project, "selected_cels", [])
	project.undo_redo.add_undo_method(
		project, "change_cel", project.current_frame, project.current_layer
	)
	project.undo_redo.add_undo_method(Global, "undo_or_redo", true)
	project.undo_redo.commit_action()


func open_image_as_new_frame(image: Image, layer_index := 0) -> void:
	var project: Project = Global.current_project
	var project_width: int = max(image.get_width(), project.size.x)
	var project_height: int = max(image.get_height(), project.size.y)
	if project.size < Vector2(project_width, project_height):
		DrawingAlgos.resize_canvas(project_width, project_height, 0, 0)

	var frame := Frame.new()
	for i in project.layers.size():
		if i == layer_index:
			image.convert(Image.FORMAT_RGBA8)
			frame.cels.append(PixelCel.new(image, 1))
		else:
			frame.cels.append(project.layers[i].new_empty_cel())

	project.undos += 1
	project.undo_redo.create_action("Add Frame")
	project.undo_redo.add_do_method(Global, "undo_or_redo", false)
	project.undo_redo.add_do_method(project, "add_frames", [frame], [project.frames.size()])
	project.undo_redo.add_do_method(project, "change_cel", project.frames.size(), layer_index)

	project.undo_redo.add_undo_method(Global, "undo_or_redo", true)
	project.undo_redo.add_undo_method(project, "remove_frames", [project.frames.size()])
	project.undo_redo.add_undo_method(
		project, "change_cel", project.current_frame, project.current_layer
	)
	project.undo_redo.commit_action()


func open_image_as_new_layer(image: Image, file_name: String, frame_index := 0) -> void:
	var project: Project = Global.current_project
	var project_width: int = max(image.get_width(), project.size.x)
	var project_height: int = max(image.get_height(), project.size.y)
	if project.size < Vector2(project_width, project_height):
		DrawingAlgos.resize_canvas(project_width, project_height, 0, 0)
	var layer := PixelLayer.new(project, file_name)
	var cels := []

	Global.current_project.undos += 1
	Global.current_project.undo_redo.create_action("Add Layer")
	for i in project.frames.size():
		if i == frame_index:
			image.convert(Image.FORMAT_RGBA8)
			cels.append(PixelCel.new(image, 1))
		else:
			cels.append(layer.new_empty_cel())

	project.undo_redo.add_do_method(project, "add_layers", [layer], [project.layers.size()], [cels])
	project.undo_redo.add_do_method(project, "change_cel", frame_index, project.layers.size())

	project.undo_redo.add_undo_method(project, "remove_layers", [project.layers.size()])
	project.undo_redo.add_undo_method(
		project, "change_cel", project.current_frame, project.current_layer
	)

	project.undo_redo.add_undo_method(Global, "undo_or_redo", true)
	project.undo_redo.add_do_method(Global, "undo_or_redo", false)
	project.undo_redo.commit_action()


func import_reference_image_from_path(path: String) -> void:
	var project: Project = Global.current_project
	var ri := ReferenceImage.new()
	ri.project = project
	ri.deserialize({"image_path": path})
	Global.canvas.add_child(ri)
	project.change_project()


# Useful for HTML5
func import_reference_image_from_image(image: Image) -> void:
	var project: Project = Global.current_project
	var ri := ReferenceImage.new()
	ri.project = project
	ri.create_from_image(image)
	Global.canvas.add_child(ri)
	project.change_project()


func set_new_imported_tab(project: Project, path: String) -> void:
	var prev_project_empty: bool = Global.current_project.is_empty()
	var prev_project_pos: int = Global.current_project_index

	Global.window_title = (
		path.get_file()
		+ " ("
		+ tr("imported")
		+ ") - Pixelorama "
		+ Global.current_version
	)
	if project.has_changed:
		Global.window_title = Global.window_title + "(*)"
	var file_name := path.get_basename().get_file()
	var directory_path := path.get_base_dir()
	project.directory_path = directory_path
	project.file_name = file_name
	project.was_exported = true
	if path.get_extension().to_lower() == "png":
		project.export_overwrite = true

	Global.tabs.current_tab = Global.tabs.get_tab_count() - 1
	Global.canvas.camera_zoom()

	if prev_project_empty:
		Global.tabs.delete_tab(prev_project_pos)


func update_autosave() -> void:
	autosave_timer.stop()
	# Interval parameter is in minutes, wait_time is seconds
	autosave_timer.wait_time = Global.autosave_interval * 60
	if Global.enable_autosave:
		autosave_timer.start()


func _on_Autosave_timeout() -> void:
	for i in range(backup_save_paths.size()):
		if backup_save_paths[i] == "":
			# Create a new backup file if it doesn't exist yet
			backup_save_paths[i] = "user://backup-" + String(OS.get_unix_time()) + "-%s" % i

		store_backup_path(i)
		save_pxo_file(backup_save_paths[i], true, true, Global.projects[i])


# Backup paths are stored in two ways:
# 1) User already manually saved and defined a save path -> {current_save_path, backup_save_path}
# 2) User didn't manually saved, "untitled" backup is stored -> {backup_save_path, backup_save_path}
func store_backup_path(i: int) -> void:
	if current_save_paths[i] != "":
		# Remove "untitled" backup if it existed on this project instance
		if Global.config_cache.has_section_key("backups", backup_save_paths[i]):
			Global.config_cache.erase_section_key("backups", backup_save_paths[i])

		Global.config_cache.set_value("backups", current_save_paths[i], backup_save_paths[i])
	else:
		Global.config_cache.set_value("backups", backup_save_paths[i], backup_save_paths[i])

	Global.config_cache.save("user://cache.ini")


func remove_backup(i: int) -> void:
	# Remove backup file
	if backup_save_paths[i] != "":
		if current_save_paths[i] != "":
			remove_backup_by_path(current_save_paths[i], backup_save_paths[i])
		else:
			# If manual save was not yet done - remove "untitled" backup
			remove_backup_by_path(backup_save_paths[i], backup_save_paths[i])
		backup_save_paths[i] = ""


func remove_backup_by_path(project_path: String, backup_path: String) -> void:
	Directory.new().remove(backup_path)
	if Global.config_cache.has_section_key("backups", project_path):
		Global.config_cache.erase_section_key("backups", project_path)
	elif Global.config_cache.has_section_key("backups", backup_path):
		Global.config_cache.erase_section_key("backups", backup_path)
	Global.config_cache.save("user://cache.ini")


func reload_backup_file(project_paths: Array, backup_paths: Array) -> void:
	assert(project_paths.size() == backup_paths.size())
	# Clear non-existent backups
	var existing_backups_count := 0
	var dir := Directory.new()
	for i in range(backup_paths.size()):
		if dir.file_exists(backup_paths[i]):
			project_paths[existing_backups_count] = project_paths[i]
			backup_paths[existing_backups_count] = backup_paths[i]
			existing_backups_count += 1
		else:
			if Global.config_cache.has_section_key("backups", backup_paths[i]):
				Global.config_cache.erase_section_key("backups", backup_paths[i])
				Global.config_cache.save("user://cache.ini")
	project_paths.resize(existing_backups_count)
	backup_paths.resize(existing_backups_count)

	# Load the backup files
	for i in range(project_paths.size()):
		open_pxo_file(backup_paths[i], project_paths[i] == backup_paths[i], i == 0)
		backup_save_paths[i] = backup_paths[i]

		# If project path is the same as backup save path -> the backup was untitled
		if project_paths[i] != backup_paths[i]:  # If the user has saved
			current_save_paths[i] = project_paths[i]
			Global.window_title = (
				project_paths[i].get_file()
				+ " - Pixelorama(*) "
				+ Global.current_version
			)
			Global.current_project.has_changed = true

	Global.notification_label("Backup reloaded")


func save_project_to_recent_list(path: String) -> void:
	var top_menu_container: Panel = Global.top_menu_container
	if path.get_file().substr(0, 7) == "backup-" or path == "":
		return

	if top_menu_container.recent_projects.has(path):
		top_menu_container.recent_projects.erase(path)

	if top_menu_container.recent_projects.size() >= 5:
		top_menu_container.recent_projects.pop_front()
	top_menu_container.recent_projects.push_back(path)

	Global.config_cache.set_value("data", "recent_projects", top_menu_container.recent_projects)

	top_menu_container.recent_projects_submenu.clear()
	top_menu_container.update_recent_projects_submenu()