"""Handles /live/application/* OSC addresses."""
import logging
from typing import Optional
from .handler import AbletonOSCHandler

logger = logging.getLogger(__name__)


class ApplicationHandler(AbletonOSCHandler):
    def init_api(self) -> None:
        self.clear_listeners()
        self._add("/live/application/get/version", self._get_version)
        self._add("/live/application/get/average_process_usage",
                  self._get_average_process_usage)
        self._add("/live/application/get/peak_process_usage",
                  self._get_peak_process_usage)

    def _app(self):
        try:
            return self.manager.application
        except Exception:
            return None

    def _get_version(self, params: tuple) -> Optional[tuple]:
        app = self._app()
        if app:
            try:
                major, minor = app.get_major_version(), app.get_minor_version()
                build = app.get_bugfix_version()
                return (major, minor, build)
            except Exception as e:
                logger.warning("get version: %s", e)
        return None

    def _get_average_process_usage(self, params: tuple) -> Optional[tuple]:
        app = self._app()
        if app:
            try:
                return (float(app.average_process_usage),)
            except Exception as e:
                logger.warning("get avg process usage: %s", e)
        return None

    def _get_peak_process_usage(self, params: tuple) -> Optional[tuple]:
        app = self._app()
        if app:
            try:
                return (float(app.peak_process_usage),)
            except Exception as e:
                logger.warning("get peak process usage: %s", e)
        return None