#!/usr/bin/env python3

"""
Service startup script.
"""
import sys
import os
import asyncio
import logging
import json
from backive.core.events import EventInterface
from backive.core.scheduler import Scheduler
from backive.core.backup import Backup
from backive.config.config import Config


logging.basicConfig(level=logging.DEBUG)
rootlogger = logging.getLogger()
rootlogger.setLevel(logging.DEBUG)
consoleHandler = logging.StreamHandler(sys.stdout)
fileHandler = logging.FileHandler("backive.log")
rootlogger.addHandler(fileHandler)
#rootlogger.addHandler(consoleHandler)

logging.info("Backive starting.")


class Backive:
    def __init__(self):
        self._scheduler = Scheduler()
        self._config = Config()
        self._events = None
        self.initialize_scheduler()

    def initialize_scheduler(self):
        backups = self._config.get_backups()
        for backup in backups:
            self._scheduler.register_backup(backup.name, backup.get_frequency())

    async def callback(self, data=None):
        data_dict = json.loads(data)
        uuid = data_dict.get("ID_FS_UUID", None)
        logging.info("UUID: %s", uuid)
        if uuid and data_dict.get("ACTION") == "add":
            logging.debug(json.dumps(data_dict, indent=4))
            backups = await self._config.get_backups_by_device(uuid)
            device = await self._config.get_uuid_device(uuid)
            prefs = await self._config.get_preferences()
            if backups:
                logging.info("Mounting device '%s'", uuid)
                mount_available = await device.mount(prefs.get("mount_root"))
                if mount_available:
                    for backup in backups:
                        if await self._scheduler.should_run(backup.name):
                            logging.info("Running backup '%s'", backup.name)
                            result = await backup.run()
                            logging.debug("Result: %s", result.decode())
                            await self._scheduler.register_run(backup.name)
                        else:
                            logging.info(
                                "Backup '%s' next run interval has not been reached.",
                                backup.name
                            )
                    logging.info("Unmounting device '%s'", uuid)
                    await device.unmount()
                else:
                    logging.error("Device %s could not be mounted...", uuid)

    def serve(self):
        loop = asyncio.get_event_loop()
        self._events = EventInterface(self.callback, None, loop)
        loop.run_forever()
        pass

    def __del__(self):
        self._scheduler.save()
        del self._events


if __name__ == "__main__":
    backive = None
    try:
        backive = Backive()
        backive.serve()
    except Exception as e:
        raise e
    finally:
        logging.info("Backive exited.")
        del backive