import logging
import os
import sys
from pathlib import Path
from socket import socket

import starlette
from gunicorn.arbiter import Arbiter
from pydantic import BaseSettings
from rich.console import Console
from rich.logging import RichHandler
from uvicorn import Server
from uvicorn.workers import UvicornWorker

from .schemas import ModelType


class Settings(BaseSettings):
    cache_folder: str = "/cache"
    model_ttl: int = 300
    model_ttl_poll_s: int = 10
    host: str = "0.0.0.0"
    port: int = 3003
    workers: int = 1
    test_full: bool = False
    request_threads: int = os.cpu_count() or 4
    model_inter_op_threads: int = 1
    model_intra_op_threads: int = 2
    ann: bool = True

    class Config:
        env_prefix = "MACHINE_LEARNING_"
        case_sensitive = False


class LogSettings(BaseSettings):
    log_level: str = "info"
    no_color: bool = False

    class Config:
        case_sensitive = False


_clean_name = str.maketrans(":\\/", "___", ".")


def clean_name(model_name: str) -> str:
    return model_name.split("/")[-1].translate(_clean_name)


def get_cache_dir(model_name: str, model_type: ModelType) -> Path:
    return Path(settings.cache_folder) / model_type.value / clean_name(model_name)


def get_hf_model_name(model_name: str) -> str:
    return f"immich-app/{clean_name(model_name)}"


LOG_LEVELS: dict[str, int] = {
    "critical": logging.ERROR,
    "error": logging.ERROR,
    "warning": logging.WARNING,
    "warn": logging.WARNING,
    "info": logging.INFO,
    "log": logging.INFO,
    "debug": logging.DEBUG,
    "verbose": logging.DEBUG,
}

settings = Settings()
log_settings = LogSettings()


class CustomRichHandler(RichHandler):
    def __init__(self) -> None:
        console = Console(color_system="standard", no_color=log_settings.no_color)
        super().__init__(show_path=False, omit_repeated_times=False, console=console, tracebacks_suppress=[starlette])


log = logging.getLogger("gunicorn.access")
log.setLevel(LOG_LEVELS.get(log_settings.log_level.lower(), logging.INFO))


# patches this issue https://github.com/encode/uvicorn/discussions/1803
class CustomUvicornServer(Server):
    async def shutdown(self, sockets: list[socket] | None = None) -> None:
        for sock in sockets or []:
            sock.close()
        await super().shutdown()


class CustomUvicornWorker(UvicornWorker):
    async def _serve(self) -> None:
        self.config.app = self.wsgi
        server = CustomUvicornServer(config=self.config)
        self._install_sigquit_handler()
        await server.serve(sockets=self.sockets)
        if not server.started:
            sys.exit(Arbiter.WORKER_BOOT_ERROR)