"""Schedule for HassIO."""
import logging
from datetime import date, datetime, time, timedelta

_LOGGER = logging.getLogger(__name__)

INTERVAL = 'interval'
REPEAT = 'repeat'
CALL = 'callback'
TASK = 'task'


class Scheduler(object):
    """Schedule task inside HassIO."""

    def __init__(self, loop):
        """Initialize task schedule."""
        self.loop = loop
        self._data = {}
        self.suspend = False

    def register_task(self, coro_callback, interval, repeat=True):
        """Schedule a coroutine.

        The coroutien need to be a callback without arguments.
        """
        task_id = hash(coro_callback)

        # generate data
        opts = {
            CALL: coro_callback,
            INTERVAL: interval,
            REPEAT: repeat,
        }

        # schedule task
        self._data[task_id] = opts
        self._schedule_task(interval, task_id)

        return task_id

    def _run_task(self, task_id):
        """Run a scheduled task."""
        data = self._data[task_id]

        if not self.suspend:
            self.loop.create_task(data[CALL]())

        if data[REPEAT]:
            self._schedule_task(data[INTERVAL], task_id)
        else:
            self._data.pop(task_id)

    def _schedule_task(self, interval, task_id):
        """Schedule a task on loop."""
        if isinstance(interval, (int, float)):
            job = self.loop.call_later(interval, self._run_task, task_id)
        elif isinstance(interval, time):
            today = datetime.combine(date.today(), interval)
            tomorrow = datetime.combine(
                date.today() + timedelta(days=1), interval)

            # check if we run it today or next day
            if today > datetime.today():
                calc = today
            else:
                calc = tomorrow

            job = self.loop.call_at(calc.timestamp(), self._run_task, task_id)
        else:
            _LOGGER.fatal("Unknow interval %s (type: %s) for scheduler %s",
                          interval, type(interval), task_id)

        # Store job
        self._data[task_id][TASK] = job