import json
from pathlib import Path
from typing import Literal

import platformdirs
from loguru import logger
from pydantic import Field
from pydantic_settings import BaseSettings, SettingsConfigDict


class Settings(BaseSettings):
    host: str = Field("irc.chat.twitch.tv", alias="Host", serialization_alias="Host")
    port: int = Field(6667, alias="Port", serialization_alias="Port")
    channel: str = Field(..., alias="Channel", serialization_alias="Channel")
    nickname: str = Field(..., alias="Nickname", serialization_alias="Nickname")
    authentication: str = Field(
        ...,
        alias="Authentication",
        serialization_alias="Authentication",
    )
    denied_users: list[str] = Field(
        [
            "StreamElements",
            "Nightbot",
            "Moobot",
            "Marbiebot",
        ],
        alias="DeniedUsers",
        serialization_alias="DeniedUsers",
    )
    banned_words: list[str] = Field(
        default_factory=list,
        alias="BannedWords",
        serialization_alias="BannedWords",
    )
    mods: list[str] = Field(
        default_factory=list,
        alias="Mods",
        serialization_alias="Mods",
    )
    cooldown: int = Field(210, alias="Cooldown", serialization_alias="Cooldown")
    key_length: int = Field(2, alias="KeyLength", serialization_alias="KeyLength")
    max_sentence_length: int = Field(
        25,
        alias="MaxSentenceWordAmount",
        serialization_alias="MaxSentenceWordAmount",
    )
    min_sentence_length: int = Field(
        -1,
        alias="MinSentenceWordAmount",
        serialization_alias="MinSentenceWordAmount",
    )
    help_message_timer: int = Field(
        60 * 60 * 5,
        alias="HelpMessageTimer",
        serialization_alias="HelpMessageTimer",
    )
    automatic_generation_timer: int = Field(
        -1,
        alias="AutomaticGenerationTimer",
        serialization_alias="AutomaticGenerationTimer",
    )
    whisper_cooldown: bool = Field(
        True,
        alias="WhisperCooldown",
        serialization_alias="WhisperCooldown",
    )
    enable_generate_command: bool = Field(
        True,
        alias="EnableGenerateCommand",
        serialization_alias="EnableGenerateCommand",
    )
    sentence_separator: str = Field(
        " - ",
        alias="SentenceSeparator",
        serialization_alias="SentenceSeparator",
    )
    allow_generate_params: bool = Field(
        True,
        alias="AllowGenerateParams",
        serialization_alias="AllowGenerateParams",
    )
    log_level: Literal[
        "CRITICAL",
        "ERROR",
        "WARNING",
        "INFO",
        "DEBUG",
        "TRACE",
    ] = Field("DEBUG", alias="LogLevel")
    model_config = SettingsConfigDict(extra="ignore")

    @property
    def channel_name(self):
        return self.channel.replace("#", "").lower()

    @classmethod
    def read(cls, filepath: Path | None = None) -> "Settings":
        if not filepath:
            filepath = (
                platformdirs.user_config_path("markovbot_gui", ensure_exists=True)
                / "settings.json"
            )

        with filepath.open("r") as f:
            data = json.load(f)
            return Settings(**data)

    def write(self, filepath: Path | None = None):
        if not filepath:
            filepath = (
                platformdirs.user_config_path("markovbot_gui", ensure_exists=True)
                / "settings.json"
            )

        with filepath.open("w") as f:
            logger.info(f"Writing current settings to {filepath}")
            json.dump(self.model_dump(by_alias=True), f, indent=4)