@tool
class_name SaveGame extends Resource

@export var filepath: String
@export var save_slot_id: int 
@export var unique_save_name: String = "frame_of_mind_save_slot_%d_%s_%s" % [save_slot_id, Time.get_date_string_from_system(), Time.get_time_string_from_system()]
@export var current_room: State.rooms = 0
@export var mementos_complete: int = 0
@export var board_state: Dictionary
@export var thumbnail: Image = Image.load_from_file("res://import/interface-elements/empty_save_slot.png")
@export var last_saved: Dictionary = Time.get_datetime_dict_from_system()

@export var is_save_file_valid: bool = false

func _init(filepath = "") -> void:
	if filepath == "":
		filepath = "usr://saves/%s" % unique_save_name
		
	read_save_file()

func _get_save_dict() -> Dictionary:
	return {
		"save_slot_id": save_slot_id,
		"unique_save_name": unique_save_name,
		"current_room": current_room,
		"mementos_complete": mementos_complete,
		"board_state": board_state,
		"last_saved": last_saved
	}


func read_save_file():
	if FileAccess.file_exists("%s.json:" % filepath):
		
		
		var file = FileAccess.open("%s.json:" % filepath, FileAccess.READ)
		var raw_json = FileAccess.get_file_as_string("%s.json:" % filepath)
		file.close()
		var parsed: Dictionary = JSON.parse_string(raw_json)
		
		var tmp_img
		if FileAccess.file_exists("%s.png" % filepath):
			tmp_img = Image.load_from_file("%s.png" % filepath)
		
		is_save_file_valid = (
				save_slot_id is int and
				unique_save_name is String and
				current_room is int and
				mementos_complete is int and
				board_state is Dictionary and
				last_saved is Dictionary and
				Time.get_unix_time_from_datetime_dict(last_saved) != 0 and 
				tmp_img is Image
			)
		
		if is_save_file_valid:
			for key in parsed.keys():
				set(key, parsed[key])
		
			thumbnail = tmp_img

func save_file(current_screen: ImageTexture):
	thumbnail = current_screen.get_image()
	current_screen.resize(384, 261, Image.INTERPOLATE_LANCZOS)
	
	thumbnail.save_png("%s.png" % filepath)
	
	var file = FileAccess.open("%s.json:" % filepath, FileAccess.WRITE)
	file.store_string(JSON.stringify(_get_save_dict()))