import time, json, dataclasses
from enum import Enum
from playsound import playsound
from sound import play

class SoundType(Enum):
	FIRST_BELL = 1
	SECOND_BELL = 2
	BREAK = 3
	CUSTOM = 4

BELL_NAMES = {
	SoundType.FIRST_BELL:    "1-й дзвоник",
	SoundType.SECOND_BELL:   "2-й дзвоник",
	SoundType.BREAK:         "Перерва"
}

@dataclasses.dataclass
class Bell:
	sound: SoundType
	hour: int
	minute: int
	played: bool = False
	# only used when sound = SoundType.CUSTOM
	custom_file: str = ""
	custom_name: str = ""

@dataclasses.dataclass
class CustomSound:
	name: str
	times: list
	sound_file: str

@dataclasses.dataclass
class Config:
	# yes, this is permanently "borrowed" from the internet
	# thx to https://stackoverflow.com/questions/53632152/why-cant-dataclasses-have-mutable-defaults-in-their-class-attributes-declaratio
	lessons_start:                  list = dataclasses.field(default_factory=lambda: [8, 0])
	lesson_length:                  int  = dataclasses.field(default_factory=lambda: 40)
	break_length:                   int  = dataclasses.field(default_factory=lambda: 5)
	first_bell:                     int  = dataclasses.field(default_factory=lambda: 1)
	num_lessons:                    int  = dataclasses.field(default_factory=lambda: 12)
	workdays:                       list = dataclasses.field(default_factory=lambda: [True, True, True, True, True, True, False])
	sound_files:                    list = dataclasses.field(default_factory=lambda: ["", "", ""])
	first_bell_before_first_lesson: bool = dataclasses.field(default_factory=lambda: True)
	custom_sounds:                  list = dataclasses.field(default_factory=lambda: [])

class Scheduler:
	def __init__(self) -> None:
		self.bells: list[Bell] = []
		self.bells_enabled: bool = True
		self.load_config()

	def set_ui_class(self, ui_class) -> None:
		self.ui = ui_class
		self.generate_bells()
		self.ui.set_settings(self.config)

	def apply_config(self) -> None:
		self.ui.get_settings(self.config, CustomSound)
		self.generate_bells()

	def generate_bells(self) -> None:
		self.bells = []
		if not self.config.workdays[time.localtime().tm_wday]:
			self.ui.set_schedule(self.get_bells_list())
			return

		day_minute: int = self.config.lessons_start[0] * 60 + self.config.lessons_start[1] - self.config.first_bell
		for lesson_number in range(self.config.num_lessons):
			if lesson_number != 0 or self.config.first_bell_before_first_lesson:
				self.bells.append(Bell(SoundType.FIRST_BELL, day_minute // 60, day_minute % 60))
			day_minute += self.config.first_bell
			self.bells.append(Bell(SoundType.SECOND_BELL, day_minute // 60, day_minute % 60))
			day_minute += self.config.lesson_length
			self.bells.append(Bell(SoundType.BREAK, day_minute // 60, day_minute % 60))
			day_minute += self.config.break_length - self.config.first_bell

		for sound in self.config.custom_sounds:
			for sound_time in sound.times:
				self.bells.append(Bell(SoundType.CUSTOM, *sound_time, custom_file=sound.sound_file, custom_name=sound.name))

		# so that the first bell before the first lesson can't roll time into the negatives
		self.bells = [bell for bell in self.bells if bell.hour <= 23]
		self.bells.sort(key=lambda sound: sound.hour * 60 + sound.minute)

		self.ui.set_schedule(self.get_bells_list())

	def get_bells_list(self) -> list:
		bells_list: list = []
		for bell in self.bells:
			if bell.sound != SoundType.CUSTOM: bell_name: str = BELL_NAMES[bell.sound]
			else:                              bell_name: str = '"' + bell.custom_name + '"'
			bells_list.append(f"{bell.hour:02}:{bell.minute:02} - {bell_name}")
		return bells_list

	def menu_event(self, button) -> None:
		if   button == 0: self.apply_config()
		elif button == 1: self.save_config()
		elif button == 2: self.bells_enabled = True
		elif button == 3: self.bells_enabled = False

	def update(self) -> None:
		if not self.bells_enabled:
			return
		t = time.localtime()
		for bell_n, bell in enumerate(self.bells):
			if (not bell.played) and (bell.hour == t.tm_hour) and (bell.minute == t.tm_min):
				bell.played = True
				self.ui.select_bell(bell_n)
				if   bell.sound == SoundType.FIRST_BELL:  play(self.config.sound_files[0])
				elif bell.sound == SoundType.SECOND_BELL: play(self.config.sound_files[1])
				elif bell.sound == SoundType.BREAK:       play(self.config.sound_files[2])
				elif bell.sound == SoundType.CUSTOM:      play(bell.custom_file)
				break

	def load_config(self) -> None:
		try:
			with open("config.json", "r") as fp:
				self.config = Config(**json.load(fp))
				for i in range(len(self.config.custom_sounds)):
					self.config.custom_sounds[i] = CustomSound(**self.config.custom_sounds[i])
		except:
			# if something goes wrong, load the default values
			# nothing should go wrong with the config file, if the user doesn't edit
			# it manually. if that's the case - it's their fault, not mine :P
			self.config = Config()

	def save_config(self) -> None:
		temp_config = Config()
		self.ui.get_settings(temp_config, CustomSound)
		with open("config.json", "w") as fp:
			json.dump(dataclasses.asdict(temp_config), fp)