################################################################################
# Module: schedule.py
# Description: Functions for handling conversion of EnergyPlus schedule objects
# License: MIT, see full license in LICENSE.txt
# Web: https://github.com/louisleroy5/translater
################################################################################

import functools
import logging as lg
import tempfile
from datetime import datetime, timedelta
from itertools import groupby

import numpy as np
import pandas as pd
from eppy.bunch_subclass import EpBunch
from path import Path

import translater
from translater import log, settings


class Schedule(object):
    """An object designed to handle any EnergyPlus schedule object"""

    def __init__(
        self,
        Name=None,
        idf=None,
        start_day_of_the_week=0,
        strict=False,
        base_year=2018,
        schType=None,
        schTypeLimitsName=None,
        values=None,
        **kwargs
    ):
        """
        Args:
            Name (str): The schedule name in the idf file
            idf (IDF): IDF object
            start_day_of_the_week (int): 0-based day of week (Monday=0)
            strict (bool): if True, schedules that have the Field-Sets such as
                Holidays and CustomDay will raise an error if they are absent
                from the IDF file. If False, any missing qualifiers will be
                ignored.
            base_year (int): The base year of the schedule. Defaults to 2018
                since the first day of that year is a Monday.
            schType (str): The EnergyPlus schedule type. eg.: "Schedule:Year"
            schTypeLimitsName:
            values:
            **kwargs:
        """
        try:
            kwargs["idf"] = idf
            Name = kwargs.get("Name", Name)
            super(Schedule, self).__init__(**kwargs)
        except:
            pass
        self.strict = strict
        self.idf = idf
        self.Name = Name
        self.startDayOfTheWeek = self.get_sdow(start_day_of_the_week)
        self.year = base_year
        self.startDate = self.start_date()

        self.count = 0
        self.startHOY = 1
        self.endHOY = 24
        self.unit = "unknown"
        self.index_ = None
        self.values = values
        self.schType = schType
        self.schTypeLimitsName = schTypeLimitsName
        if self.schTypeLimitsName is None:
            self.schTypeLimitsName = self.get_schedule_type_limits_name(
                sch_type=self.schType
            )

    @classmethod
    def from_values(cls, Name, values, **kwargs):
        """
        Args:
            Name:
            values:
            **kwargs:
        """
        return cls(Name=Name, values=values, **kwargs)

    @classmethod
    def constant_schedule(cls, hourly_value=1, Name="AlwaysOn", idf=None, **kwargs):
        """Create a schedule with a constant value for the whole yetr. Defaults
        to a schedule with a value of 1, named 'AlwaysOn'.

        Args:
            hourly_value (float, optional): The value for the constant schedule.
                Defaults to 1.
            Name (str, optional): The name of the schedule. Defaults to Always
                On.
            idf:
            **kwargs:
        """
        if idf:
            # Add the schedule to the existing idf
            idf.add_object(
                ep_object="Schedule:Constant".upper(),
                **dict(
                    Name=Name, Schedule_Type_Limits_Name="", Hourly_Value=hourly_value
                ),
                save=False
            )
            return cls(Name=Name, idf=idf, **kwargs)
        else:
            # Create a new idf object and add the schedule to it.
            idftxt = "VERSION, {};".format(
                settings.ep_version.replace("-", ".")[0:3]
            )  # Not an empty string. has just the
            # version number
            # we can make a file handle of a string
            if not Path(settings.cache_folder).exists():
                Path(settings.cache_folder).mkdir_p()
            with tempfile.NamedTemporaryFile(
                mode="w",
                suffix="_schedule.idf",
                prefix="temp_",
                dir=settings.cache_folder,
                delete=False,
            ) as file:
                file.write(idftxt)
                # initialize the IDF object with the file handle
            from eppy.easyopen import easyopen

            idf_scratch = easyopen(file.name)
            idf_scratch.__class__ = translater.IDF

            idf_scratch.add_object(
                ep_object="Schedule:Constant".upper(),
                **dict(
                    Name=Name, Schedule_Type_Limits_Name="", Hourly_Value=hourly_value
                ),
                save=False
            )

            sched = cls(Name=Name, idf=idf_scratch, **kwargs)
            return sched

    @property
    def all_values(self):
        """returns the values array"""
        if self.values is None:
            epbunch = self.idf.get_schedule_epbunch(self.Name)
            self.values = self.get_schedule_values(epbunch)
        return self.values

    @property
    def max(self):
        return max(self.all_values)

    @property
    def min(self):
        return min(self.all_values)

    @property
    def mean(self):
        return np.mean(self.all_values)

    @property
    def series(self):
        """Returns the schedule values as a pd.Series object with a
        DateTimeIndex
        """
        index = pd.date_range(
            start=self.startDate, periods=len(self.all_values), freq="1H"
        )
        return pd.Series(self.all_values, index=index)

    def get_schedule_type_limits_name(self, sch_type=None):
        """Return the Schedule Type Limits name associated to this schedule

        Args:
            sch_type:
        """
        schedule_values = self.idf.get_schedule_epbunch(self.Name, sch_type=sch_type)
        try:
            schedule_limit_name = schedule_values.Schedule_Type_Limits_Name
        except:
            return "unknown"
        else:
            return schedule_limit_name

    def get_schedule_type_limits_data(self, name=None):
        """Returns Schedule Type Limits data from schedule name

        Args:
            name:
        """

        if name is None:
            name = self.Name

        schedule_values = self.idf.get_schedule_epbunch(name)
        try:
            schedule_limit_name = schedule_values.Schedule_Type_Limits_Name
        except:
            # this schedule is probably a 'Schedule:Week:Daily' which does
            # not have a Schedule_Type_Limits_Name field
            return "", "", "", ""
        else:
            lower_limit, upper_limit, numeric_type, unit_type = self.idf.get_schedule_type_limits_data_by_name(
                schedule_limit_name
            )

            self.unit = unit_type
            if self.unit == "unknown":
                self.unit = numeric_type

            return lower_limit, upper_limit, numeric_type, unit_type

    def get_schedule_type(self, name=None):
        """Return the schedule type, eg.: "Schedule:Year"

        Args:
            name:
        """
        if name is None:
            name = self.Name

        schedule_values = self.idf.get_schedule_epbunch(name)
        sch_type = schedule_values.key

        return sch_type

    def start_date(self):
        """The start date of the schedule. Satisfies `startDayOfTheWeek`"""
        import calendar

        c = calendar.Calendar(firstweekday=self.startDayOfTheWeek)
        start_date = c.monthdatescalendar(self.year, 1)[0][0]
        return datetime(start_date.year, start_date.month, start_date.day)

    def plot(self, slice=None, **kwargs):
        """Plot the schedule. Implements the .loc accessor on the series object.

        Examples:
            >>> s = Schedule(
            >>>         Name="NECB-A-Thermostat Setpoint-Heating",
            >>>         idf=idf_object)
            >>>     )
            >>> s.plot(slice=("2018/01/02", "2018/01/03"), drawstyle="steps-post")
            >>> plt.show()

        Args:
            slice (tuple): define a 2-tuple object the will be passed to
                :class:`pandas.IndexSlice` as a range.
            **kwargs (dict): keyword arguments passed to
                :meth:`pandas.Series.plot`.
        """
        hourlyvalues = self.all_values
        index = pd.date_range(self.startDate, periods=len(hourlyvalues), freq="1H")
        series = pd.Series(hourlyvalues, index=index, dtype=float)
        if slice is None:
            slice = pd.IndexSlice[:]
        elif len(slice) > 1:
            slice = pd.IndexSlice[slice[0] : slice[1]]
        label = kwargs.pop("label", self.Name)
        ax = series.loc[slice].plot(**kwargs, label=label)
        return ax

    def get_interval_day_ep_schedule_values(self, epbunch):
        """Schedule:Day:Interval

        Args:
            epbunch (EpBunch): The schedule EpBunch object.
        """

        lower_limit, upper_limit, numeric_type, unit_type = self.get_schedule_type_limits_data(
            epbunch.Name
        )

        number_of_day_sch = int((len(epbunch.fieldvalues) - 3) / 2)

        hourly_values = np.arange(24, dtype=float)
        start_hour = 0
        for i in range(number_of_day_sch):
            value = float(epbunch["Value_Until_Time_{}".format(i + 1)])
            until_time = [
                int(s.strip())
                for s in epbunch["Time_{}".format(i + 1)].split(":")
                if s.strip().isdigit()
            ]
            end_hour = int(until_time[0] + until_time[1] / 60)
            for hour in range(start_hour, end_hour):
                hourly_values[hour] = value

            start_hour = end_hour

        if numeric_type.strip().lower() == "discrete":
            hourly_values = hourly_values.astype(int)

        return hourly_values

    def get_hourly_day_ep_schedule_values(self, epbunch):
        """Schedule:Day:Hourly

        Args:
            epbunch (EpBunch): The schedule EpBunch object.
        """

        fieldvalues_ = np.array(epbunch.fieldvalues[3:])

        return fieldvalues_

    def get_compact_weekly_ep_schedule_values(
        self, epbunch, start_date=None, index=None
    ):
        """schedule:week:compact

        Args:
            epbunch (EpBunch): the name of the schedule
            start_date:
            index:
        """
        if start_date is None:
            start_date = self.startDate
        if index is None:
            idx = pd.date_range(start=start_date, periods=168, freq="1H")
            slicer_ = pd.Series([False] * (len(idx)), index=idx)
        else:
            slicer_ = pd.Series([False] * (len(index)), index=index)

        weekly_schedules = pd.Series([0] * len(slicer_), index=slicer_.index)
        # update last day of schedule

        if self.count == 0:
            self.schType = epbunch.key
            self.endHOY = 168

        num_of_daily_schedules = int(len(epbunch.fieldvalues[2:]) / 2)

        for i in range(num_of_daily_schedules):
            day_type = epbunch["DayType_List_{}".format(i + 1)].lower()
            how = self.field_set(day_type, slicer_)
            if not weekly_schedules.loc[how].empty:
                # Loop through days and replace with day:schedule values
                days = []
                for name, day in weekly_schedules.loc[how].groupby(
                    pd.Grouper(freq="D")
                ):
                    if not day.empty:
                        ref = epbunch.get_referenced_object(
                            "ScheduleDay_Name_{}".format(i + 1)
                        )
                        day.loc[:] = self.get_schedule_values(sched_epbunch=ref)
                        days.append(day)
                new = pd.concat(days)
                slicer_.update(pd.Series([True] * len(new.index), index=new.index))
                slicer_ = slicer_.apply(lambda x: x == True)
                weekly_schedules.update(new)
            else:
                return weekly_schedules.values

        return weekly_schedules.values

    def get_daily_weekly_ep_schedule_values(self, epbunch):
        """schedule:week:daily

        Args:
            epbunch (EpBunch): The schedule EpBunch object.
        """
        # 7 list for 7 days of the week
        hourly_values = []
        for day in [
            "Monday",
            "Tuesday",
            "Wednesday",
            "Thursday",
            "Friday",
            "Saturday",
            "Sunday",
        ]:
            ref = epbunch.get_referenced_object("{}_ScheduleDay_Name".format(day))
            h = self.get_schedule_values(sched_epbunch=ref)
            hourly_values.append(h)
        hourly_values = np.array(hourly_values)
        # shift days earlier by self.startDayOfTheWeek
        hourly_values = np.roll(hourly_values, -self.startDayOfTheWeek, axis=0)

        return hourly_values.ravel()

    def get_list_day_ep_schedule_values(self, epbunch):
        """schedule:day:list

        Args:
            epbunch (EpBunch): The schedule epbunch object.
        """
        import pandas as pd

        freq = int(epbunch["Minutes_per_Item"])  # Frequency of the values
        num_values = epbunch.fieldvalues[5:]  # List of values
        method = epbunch["Interpolate_to_Timestep"]  # How to resample

        # fill a list of available values and pad with zeros (this is safer
        # but should not occur)
        all_values = np.arange(int(24 * 60 / freq))
        for i in all_values:
            try:
                all_values[i] = num_values[i]
            except:
                all_values[i] = 0
        # create a fake index to help us with the resampling
        index = pd.date_range(
            start=self.startDate, periods=(24 * 60) / freq, freq="{}T".format(freq)
        )
        series = pd.Series(all_values, index=index)

        # resample series to hourly values and apply resampler function
        series = series.resample("1H").apply(_how(method))

        return series.values

    def get_constant_ep_schedule_values(self, epbunch):
        """schedule:constant

        Args:
            epbunch (EpBunch): The schedule epbunch object.
        """
        lower_limit, upper_limit, numeric_type, unit_type = self.get_schedule_type_limits_data(
            epbunch.Name
        )

        hourly_values = np.arange(8760)
        value = float(epbunch["Hourly_Value"])
        for hour in hourly_values:
            hourly_values[hour] = value

        if numeric_type.strip().lower() == "discrete":
            hourly_values = hourly_values.astype(int)

        return hourly_values

    def get_file_ep_schedule_values(self, epbunch):
        """schedule:file

        Args:
            epbunch (EpBunch): The schedule epbunch object.
        """
        filename = epbunch["File_Name"]
        column = epbunch["Column_Number"]
        rows = epbunch["Rows_to_Skip_at_Top"]
        hours = epbunch["Number_of_Hours_of_Data"]
        sep = epbunch["Column_Separator"]
        interp = epbunch["Interpolate_to_Timestep"]

        import pandas as pd
        import os

        idfdir = os.path.dirname(self.idf.idfname)
        file = os.path.join(idfdir, filename)
        delimeter = _separator(sep)
        skip_rows = int(rows) - 1  # We want to keep the column
        col = [int(column) - 1]  # zero-based
        epbunch = pd.read_csv(
            file, delimiter=delimeter, skiprows=skip_rows, usecols=col
        )

        return epbunch.iloc[:, 0].values

    def get_compact_ep_schedule_values(self, epbunch):
        """schedule:compact

        Args:
            epbunch (EpBunch): The schedule epbunch object.
        """
        field_sets = ["through", "for", "interpolate", "until", "value"]
        fields = epbunch.fieldvalues[3:]

        index = pd.date_range(start=self.startDate, periods=8760, freq="H")
        zeros = np.zeros(len(index))

        slicer_ = pd.Series([False] * len(index), index=index)
        series = pd.Series(zeros, index=index)

        from_day = self.startDate
        ep_from_day = datetime(self.year, 1, 1)
        from_time = "00:00"
        how_interpolate = None
        for field in fields:
            if any([spe in field.lower() for spe in field_sets]):
                f_set, hour, minute, value = self._field_interpreter(field)

                if f_set.lower() == "through":
                    # main condition. All sub-conditions must obey a
                    # `Through` condition

                    # First, initialize the slice (all False for now)
                    through_conditions = self.invalidate_condition(series)

                    # reset from_time
                    from_time = "00:00"

                    # Prepare ep_to_day variable
                    ep_to_day = self._date_field_interpretation(value) + timedelta(
                        days=1
                    )

                    # Calculate Timedelta in days
                    days = (ep_to_day - ep_from_day).days
                    # Add timedelta to start_date
                    to_day = from_day + timedelta(days=days) + timedelta(hours=-1)

                    # slice the conditions with the range and apply True
                    through_conditions.loc[from_day:to_day] = True

                    from_day = to_day + timedelta(hours=1)
                    ep_from_day = ep_to_day
                elif f_set.lower() == "for":
                    # slice specific days
                    # reset from_time
                    from_time = "00:00"

                    for_condition = self.invalidate_condition(series)
                    fors = value.split()
                    if len(fors) > 1:
                        # if multiple `For`. eg.: For: Weekends Holidays,
                        # Combine both conditions
                        for value in fors:
                            if value.lower() == "allotherdays":
                                # Apply condition to slice
                                how = self.field_set(value, slicer_)
                                # Reset through condition
                                through_conditions = how
                                for_condition = how
                            else:
                                how = self.field_set(value, slicer_)
                                if how is not None:
                                    for_condition.loc[how] = True
                    elif value.lower() == "allotherdays":
                        # Apply condition to slice
                        how = self.field_set(value, slicer_)
                        # Reset through condition
                        through_conditions = how
                        for_condition = how
                    else:
                        # Apply condition to slice
                        how = self.field_set(value, slicer_)
                        for_condition.loc[how] = True

                    # Combine the for_condition with all_conditions
                    all_conditions = through_conditions & for_condition

                    # update in memory slice
                    # self.sliced_day_.loc[all_conditions] = True
                elif "interpolate" in f_set.lower():
                    # we need to upsample to series to 8760 * 60 values
                    new_idx = pd.date_range(
                        start=self.startDate, periods=525600, closed="left", freq="T"
                    )
                    series = series.resample("T").pad()
                    series = series.reindex(new_idx)
                    series.fillna(method="pad", inplace=True)
                    through_conditions = through_conditions.resample("T").pad()
                    through_conditions = through_conditions.reindex(new_idx)
                    through_conditions.fillna(method="pad", inplace=True)
                    for_condition = for_condition.resample("T").pad()
                    for_condition = for_condition.reindex(new_idx)
                    for_condition.fillna(method="pad", inplace=True)
                    how_interpolate = value.lower()
                elif f_set.lower() == "until":
                    until_condition = self.invalidate_condition(series)
                    if series.index.freq.name == "T":
                        # until_time = str(int(hour) - 1) + ':' + minute
                        until_time = timedelta(
                            hours=int(hour), minutes=int(minute)
                        ) - timedelta(minutes=1)

                    else:
                        until_time = str(int(hour) - 1) + ":" + minute
                    until_condition.loc[
                        until_condition.between_time(from_time, str(until_time)).index
                    ] = True
                    all_conditions = (
                        for_condition & through_conditions & until_condition
                    )

                    from_time = str(int(hour)) + ":" + minute
                elif f_set.lower() == "value":
                    # If the therm `Value: ` field is used, we will catch it
                    # here.
                    # update in memory slice
                    slicer_.loc[all_conditions] = True
                    series[all_conditions] = value
                else:
                    # Do something here before looping to the next Field
                    pass
            else:
                # If the term `Value: ` is not used; the variable is simply
                # passed in the Field
                value = float(field)
                series[all_conditions] = value

                # update in memory slice
                slicer_.loc[all_conditions] = True
        if how_interpolate:
            return series.resample("H").mean().values
        else:
            return series.values

    def _field_interpreter(self, field):
        """dealing with a Field-Set (Through, For, Interpolate, # Until, Value)
        and return the parsed string

        Args:
            field:
        """

        values_sets = [
            "weekdays",
            "weekends",
            "alldays",
            "allotherdays",
            "sunday",
            "monday",
            "tuesday",
            "wednesday",
            "thursday",
            "friday",
            "saturday",
            "summerdesignday",
            "winterdesignday",
            "holiday",
        ]
        keywords = None

        if "through" in field.lower():
            # deal with through
            if ":" in field.lower():
                # parse colon
                f_set, statement = field.split(":")
                hour = None
                minute = None
                value = statement.strip()
            else:
                msg = (
                    'The schedule "{sch}" contains a Field '
                    'that is not understood: "{field}"'.format(
                        sch=self.Name, field=field
                    )
                )
                raise NotImplementedError(msg)
        elif "for" in field.lower():
            keywords = [word for word in values_sets if word in field.lower()]
            if ":" in field.lower():
                # parse colon
                f_set, statement = field.split(":")
                value = statement.strip()
                hour = None
                minute = None
            elif keywords:
                # get epBunch of the sizing period
                statement = " ".join(keywords)
                f_set = [s for s in field.split() if "for" in s.lower()][0]
                value = statement.strip()
                hour = None
                minute = None
            else:
                # parse without a colon
                msg = (
                    'The schedule "{sch}" contains a Field '
                    'that is not understood: "{field}"'.format(
                        sch=self.Name, field=field
                    )
                )
                raise NotImplementedError(msg)
        elif "interpolate" in field.lower():
            msg = (
                'The schedule "{sch}" contains sub-hourly values ('
                'Field-Set="{field}"). The average over the hour is '
                "taken".format(sch=self.Name, field=field)
            )
            log(msg, lg.WARNING)
            f_set, value = field.split(":")
            hour = None
            minute = None
        elif "until" in field.lower():
            if ":" in field.lower():
                # parse colon
                try:
                    f_set, hour, minute = field.split(":")
                    hour = hour.strip()  # remove trailing spaces
                    minute = minute.strip()  # remove trailing spaces
                    value = None
                except:
                    f_set = "until"
                    hour, minute = field.split(":")
                    hour = hour[-2:].strip()
                    minute = minute.strip()
                    value = None
            else:
                msg = (
                    'The schedule "{sch}" contains a Field '
                    'that is not understood: "{field}"'.format(
                        sch=self.Name, field=field
                    )
                )
                raise NotImplementedError(msg)
        elif "value" in field.lower():
            if ":" in field.lower():
                # parse colon
                f_set, statement = field.split(":")
                value = statement.strip()
                hour = None
                minute = None
            else:
                msg = (
                    'The schedule "{sch}" contains a Field '
                    'that is not understood: "{field}"'.format(
                        sch=self.Name, field=field
                    )
                )
                raise NotImplementedError(msg)
        else:
            # deal with the data value
            f_set = field
            hour = None
            minute = None
            value = field[len(field) + 1 :].strip()

        return f_set, hour, minute, value

    @staticmethod
    def invalidate_condition(series):
        """
        Args:
            series:
        """
        index = series.index
        periods = len(series)
        return pd.Series([False] * periods, index=index)

    def get_yearly_ep_schedule_values(self, epbunch):
        """schedule:year

        Args:
            epbunch (EpBunch): the schedule epbunch.
        """
        # first week

        start_date = self.startDate
        idx = pd.date_range(start=start_date, periods=8760, freq="1H")
        hourly_values = pd.Series([0] * 8760, index=idx)

        # update last day of schedule
        self.endHOY = 8760

        # generate weekly schedules
        num_of_weekly_schedules = int(len(epbunch.fieldvalues[3:]) / 5)

        for i in range(num_of_weekly_schedules):
            ref = epbunch.get_referenced_object("ScheduleWeek_Name_{}".format(i + 1))

            start_month = getattr(epbunch, "Start_Month_{}".format(i + 1))
            end_month = getattr(epbunch, "End_Month_{}".format(i + 1))
            start_day = getattr(epbunch, "Start_Day_{}".format(i + 1))
            end_day = getattr(epbunch, "End_Day_{}".format(i + 1))

            start = datetime.strptime(
                "{}/{}/{}".format(self.year, start_month, start_day), "%Y/%m/%d"
            )
            end = datetime.strptime(
                "{}/{}/{}".format(self.year, end_month, end_day), "%Y/%m/%d"
            )
            days = (end - start).days + 1

            end_date = start_date + timedelta(days=days) + timedelta(hours=23)
            how = pd.IndexSlice[start_date:end_date]

            weeks = []
            for name, week in hourly_values.loc[how].groupby(pd.Grouper(freq="168H")):
                if not week.empty:
                    try:
                        week.loc[:] = self.get_schedule_values(
                            sched_epbunch=ref,
                            start_date=week.index[0],
                            index=week.index,
                        )
                    except ValueError:
                        week.loc[:] = self.get_schedule_values(
                            sched_epbunch=ref, start_date=week.index[0]
                        )[0 : len(week)]
                    finally:
                        weeks.append(week)
            new = pd.concat(weeks)
            hourly_values.update(new)
            start_date += timedelta(days=days)

        return hourly_values.values

    def get_schedule_values(self, sched_epbunch, start_date=None, index=None):
        """Main function that returns the schedule values

        Args:
            sched_epbunch (EpBunch): the schedule epbunch object
            start_date:
            index:
        """
        if self.count == 0:
            # This is the first time, get the schedule type and the type limits.
            if self.schTypeLimitsName is None:
                self.schTypeLimitsName = self.get_schedule_type_limits_name()
        self.count += 1

        sch_type = sched_epbunch.key.upper()

        if sch_type.upper() == "schedule:year".upper():
            hourly_values = self.get_yearly_ep_schedule_values(sched_epbunch)
        elif sch_type.upper() == "schedule:day:interval".upper():
            hourly_values = self.get_interval_day_ep_schedule_values(sched_epbunch)
        elif sch_type.upper() == "schedule:day:hourly".upper():
            hourly_values = self.get_hourly_day_ep_schedule_values(sched_epbunch)
        elif sch_type.upper() == "schedule:day:list".upper():
            hourly_values = self.get_list_day_ep_schedule_values(sched_epbunch)
        elif sch_type.upper() == "schedule:week:compact".upper():
            hourly_values = self.get_compact_weekly_ep_schedule_values(
                sched_epbunch, start_date, index
            )
        elif sch_type.upper() == "schedule:week:daily".upper():
            hourly_values = self.get_daily_weekly_ep_schedule_values(sched_epbunch)
        elif sch_type.upper() == "schedule:constant".upper():
            hourly_values = self.get_constant_ep_schedule_values(sched_epbunch)
        elif sch_type.upper() == "schedule:compact".upper():
            hourly_values = self.get_compact_ep_schedule_values(sched_epbunch)
        elif sch_type.upper() == "schedule:file".upper():
            hourly_values = self.get_file_ep_schedule_values(sched_epbunch)
        else:
            log(
                "translater does not currently support schedules of type "
                '"{}"'.format(sch_type),
                lg.WARNING,
            )
            hourly_values = []

        return hourly_values

    def to_year_week_day(self, values=None, idf=None):
        """convert a Schedule Class to the 'Schedule:Year',
        'Schedule:Week:Daily' and 'Schedule:Day:Hourly' representation

        Args:
            values:
            idf:

        Returns:
            3-element tuple containing

            - **yearly** (*Schedule*): The yearly schedule object
            - **weekly** (*list of Schedule*): The list of weekly schedule
              objects
            - **daily** (*list of Schedule*):The list of daily schedule objects
        """
        if values:
            full_year = values
        else:
            full_year = np.array(self.all_values)  # array of shape (8760,)
        values = full_year.reshape(-1, 24)  # shape (365, 24)

        # create unique days
        unique_days, nds = np.unique(values, axis=0, return_inverse=True)

        ep_days = []
        dict_day = {}
        count_day = 0
        for unique_day in unique_days:
            name = "d_" + self.Name + "_" + "%03d" % count_day
            name, count_day = translater.check_unique_name(
                "d", count_day, name, translater.settings.unique_schedules, suffix=True
            )
            dict_day[name] = unique_day

            translater.settings.unique_schedules.append(name)

            # Create idf_objects for schedule:day:hourly
            ep_day = self.idf.add_object(
                ep_object="Schedule:Day:Hourly".upper(),
                save=False,
                **dict(
                    Name=name,
                    Schedule_Type_Limits_Name=self.schTypeLimitsName,
                    **{"Hour_{}".format(i + 1): unique_day[i] for i in range(24)}
                )
            )
            ep_days.append(ep_day)

        # create unique weeks from unique days
        unique_weeks, nwsi, nws, count = np.unique(
            full_year[: 364 * 24, ...].reshape(-1, 168),
            return_index=True,
            axis=0,
            return_inverse=True,
            return_counts=True,
        )

        # Appending unique weeks in dictionary with name and values of weeks as
        # keys
        # {'name_week': {'dayName':[]}}
        dict_week = {}
        count_week = 0
        for unique_week in unique_weeks:
            week_id = "w_" + self.Name + "_" + "%03d" % count_week
            week_id, count_week = translater.check_unique_name(
                "w",
                count_week,
                week_id,
                translater.settings.unique_schedules,
                suffix=True,
            )
            translater.settings.unique_schedules.append(week_id)

            dict_week[week_id] = {}
            for i in list(range(0, 7)):
                day_of_week = unique_week[..., i * 24 : (i + 1) * 24]
                for key in dict_day:
                    if (day_of_week == dict_day[key]).all():
                        dict_week[week_id]["day_{}".format(i)] = key

        # Create idf_objects for schedule:week:daily
        # We use the calendar module to set the week days order
        import calendar

        # initialize the calendar object
        c = calendar.Calendar(firstweekday=self.startDayOfTheWeek)

        # Create ep_weeks list and iterate over dict_week
        ep_weeks = []
        for week_id in dict_week:
            ep_week = self.idf.add_object(
                ep_object="Schedule:Week:Daily".upper(),
                save=False,
                **dict(
                    Name=week_id,
                    **{
                        "{}_ScheduleDay_Name".format(
                            calendar.day_name[day_num]
                        ): dict_week[week_id]["day_{}".format(day_num)]
                        for day_num in c.iterweekdays()
                    },
                    Holiday_ScheduleDay_Name=dict_week[week_id]["day_6"],
                    SummerDesignDay_ScheduleDay_Name=dict_week[week_id]["day_1"],
                    WinterDesignDay_ScheduleDay_Name=dict_week[week_id]["day_1"],
                    CustomDay1_ScheduleDay_Name=dict_week[week_id]["day_2"],
                    CustomDay2_ScheduleDay_Name=dict_week[week_id]["day_5"]
                )
            )
            ep_weeks.append(ep_week)

        blocks = {}
        from_date = datetime(self.year, 1, 1)
        bincount = [sum(1 for _ in group) for key, group in groupby(nws + 1) if key]
        week_order = {
            i: v
            for i, v in enumerate(
                np.array([key for key, group in groupby(nws + 1) if key]) - 1
            )
        }
        for i, (week_n, count) in enumerate(zip(week_order, bincount)):
            week_id = list(dict_week)[week_order[i]]
            to_date = from_date + timedelta(days=int(count * 7), hours=-1)
            blocks[i] = {}
            blocks[i]["week_id"] = week_id
            blocks[i]["from_day"] = from_date.day
            blocks[i]["end_day"] = to_date.day
            blocks[i]["from_month"] = from_date.month
            blocks[i]["end_month"] = to_date.month
            from_date = to_date + timedelta(hours=1)

            # If this is the last block, force end of year
            if i == len(bincount) - 1:
                blocks[i]["end_day"] = 31
                blocks[i]["end_month"] = 12

        new_dict = dict(
            Name=self.Name + "_", Schedule_Type_Limits_Name=self.schTypeLimitsName
        )
        for i in blocks:
            new_dict.update(
                {
                    "ScheduleWeek_Name_{}".format(i + 1): blocks[i]["week_id"],
                    "Start_Month_{}".format(i + 1): blocks[i]["from_month"],
                    "Start_Day_{}".format(i + 1): blocks[i]["from_day"],
                    "End_Month_{}".format(i + 1): blocks[i]["end_month"],
                    "End_Day_{}".format(i + 1): blocks[i]["end_day"],
                }
            )

        ep_year = self.idf.add_object(
            ep_object="Schedule:Year".upper(), save=False, **new_dict
        )
        return ep_year, ep_weeks, ep_days

    def _date_field_interpretation(self, field):
        """Date Field Interpretation

        Info:
            See EnergyPlus documentation for more details: 1.6.8.1.2 Field:
            Start Date (Table 1.4: Date Field Interpretation)

        Args:
            field (str): The EnergyPlus Field Contents

        Returns:
            (datetime): The datetime object
        """
        # < number > Weekday in Month
        formats = ["%m/%d", "%d %B", "%B %d", "%d %b", "%b %d"]
        date = None
        for format_str in formats:
            # Tru to parse using each defined formats
            try:
                date = datetime.strptime(field, format_str)
            except:
                pass
            else:
                date = datetime(self.year, date.month, date.day)
        if date is None:
            # if the defined formats did not work, try the fancy parse
            try:
                date = self._parse_fancy_string(field)
            except:
                msg = (
                    "the schedule '{sch}' contains a "
                    "Field that is not understood: '{field}'".format(
                        sch=self.Name, field=field
                    )
                )
                raise ValueError(msg)
            else:
                return date
        else:
            return date

    def _parse_fancy_string(self, field):
        """Will try to parse cases such as `3rd Monday in February` or `Last
        Weekday In Month`

        Args:
            field (str): The EnergyPlus Field Contents

        Returns:
            (datetime): The datetime object
        """
        import re

        # split the string at the term ' in '
        time, month = field.lower().split(" in ")
        month = datetime.strptime(month, "%B").month

        # split the first part into nth and dayofweek
        nth, dayofweek = time.split(" ")
        if "last" in nth:
            nth = -1  # Use the last one
        else:
            nth = re.findall(r"\d+", nth)  # use the nth one
            nth = int(nth[0]) - 1  # python is zero-based

        weekday = {
            "monday": 0,
            "tuesday": 1,
            "wednesday": 2,
            "thursday": 3,
            "friday": 4,
            "saturday": 5,
            "sunday": 6,
        }

        # parse the dayofweek eg. monday
        dayofweek = weekday.get(dayofweek, 6)

        # create list of possible days using Calendar
        import calendar

        c = calendar.Calendar(firstweekday=self.startDayOfTheWeek)
        monthcal = c.monthdatescalendar(self.year, month)

        # iterate though the month and get the nth weekday
        date = [
            day
            for week in monthcal
            for day in week
            if day.weekday() == dayofweek and day.month == month
        ][nth]
        return datetime(date.year, date.month, date.day)

    def field_set(self, field, slicer_=None):
        """helper function to return the proper slicer depending on the
        field_set value.

        Available values are: Weekdays, Weekends, Holidays, Alldays,
        SummerDesignDay, WinterDesignDay, Sunday, Monday, Tuesday, Wednesday,
        Thursday, Friday, Saturday, CustomDay1, CustomDay2, AllOtherDays

        Args:
            field (str): The EnergyPlus field set value.
            slicer_:

        Returns:
            (indexer-like): Returns the appropriate indexer for the series.
        """

        if field.lower() == "weekdays":
            # return only days of weeks
            return lambda x: x.index.dayofweek < 5
        elif field.lower() == "weekends":
            # return only weekends
            return lambda x: x.index.dayofweek >= 5
        elif field.lower() == "alldays":
            log(
                'For schedule "{}", the field-set "AllDays" may be overridden '
                'by the "AllOtherDays" field-set'.format(self.Name),
                lg.WARNING,
            )
            # return all days := equivalenet to .loc[:]
            return pd.IndexSlice[:]
        elif field.lower() == "allotherdays":
            # return unused days (including special days). Uses the global
            # variable `slicer_`
            import operator

            if slicer_ is not None:
                return _conjunction(
                    *[self.special_day(field, slicer_), ~slicer_], logical=operator.or_
                )
            else:
                raise NotImplementedError
        elif field.lower() == "sunday":
            # return only sundays
            return lambda x: x.index.dayofweek == 6
        elif field.lower() == "monday":
            # return only mondays
            return lambda x: x.index.dayofweek == 0
        elif field.lower() == "tuesday":
            # return only Tuesdays
            return lambda x: x.index.dayofweek == 1
        elif field.lower() == "wednesday":
            # return only Wednesdays
            return lambda x: x.index.dayofweek == 2
        elif field.lower() == "thursday":
            # return only Thursdays
            return lambda x: x.index.dayofweek == 3
        elif field.lower() == "friday":
            # return only Fridays
            return lambda x: x.index.dayofweek == 4
        elif field.lower() == "saturday":
            # return only Saturdays
            return lambda x: x.index.dayofweek == 5
        elif field.lower() == "summerdesignday":
            # return design_day(self, field)
            return None
        elif field.lower() == "winterdesignday":
            # return design_day(self, field)
            return None
        elif field.lower() == "holiday" or field.lower() == "holidays":
            field = "holiday"
            return self.special_day(field, slicer_)
        elif not self.strict:
            # If not strict, ignore missing field-sets such as CustomDay1
            return None
        else:
            raise NotImplementedError(
                "translater does not yet support The " 'Field_set "{}"'.format(field)
            )

    def __len__(self):
        """returns the length of all values of the schedule"""
        return len(self.all_values)

    def __add__(self, other):
        if isinstance(other, Schedule):
            return self.all_values + other.all_values
        elif isinstance(other, list):
            return self.all_values + other
        else:
            raise NotImplementedError

    def __sub__(self, other):
        if isinstance(other, Schedule):
            return self.all_values - other.all_values
        elif isinstance(other, list):
            return self.all_values - other
        else:
            raise NotImplementedError

    def __mul__(self, other):
        if isinstance(other, Schedule):
            return self.all_values * other.all_values
        elif isinstance(other, list):
            return self.all_values * other
        else:
            raise NotImplementedError

    def get_sdow(self, start_day_of_week):
        """Returns the start day of the week

        Args:
            start_day_of_week:
        """
        if start_day_of_week is None:
            return self.idf.day_of_week_for_start_day
        else:
            return start_day_of_week

    def special_day(self, field, slicer_):
        """try to get the RunPeriodControl:SpecialDays for the corresponding Day
        Type

        Args:
            field:
            slicer_:
        """
        sp_slicer_ = slicer_.copy()
        sp_slicer_.loc[:] = False
        special_day_types = ["holiday", "customday1", "customday2"]

        dds = self.idf.idfobjects["RunPeriodControl:SpecialDays".upper()]
        dd = [
            dd
            for dd in dds
            if dd.Special_Day_Type.lower() == field
            or dd.Special_Day_Type.lower() in special_day_types
        ]
        if len(dd) > 0:
            slice = []
            for dd in dd:
                # can have more than one special day types
                data = dd.Start_Date
                ep_start_date = self._date_field_interpretation(data)
                ep_orig = datetime(self.year, 1, 1)
                days_to_speciald = (ep_start_date - ep_orig).days
                duration = int(dd.Duration)
                from_date = self.startDate + timedelta(days=days_to_speciald)
                to_date = from_date + timedelta(days=duration) + timedelta(hours=-1)

                sp_slicer_.loc[from_date:to_date] = True
            return sp_slicer_
        elif not self.strict:
            return sp_slicer_
        else:
            msg = (
                'Could not find a "SizingPeriod:DesignDay" object '
                'needed for schedule "{}" with Day Type "{}"'.format(
                    self.Name, field.capitalize()
                )
            )
            raise ValueError(msg)

    def design_day(self, field, slicer_):
        # try to get the SizingPeriod:DesignDay for the corresponding Day Type
        """
        Args:
            field:
            slicer_:
        """
        sp_slicer_ = slicer_.copy()
        sp_slicer_.loc[:] = False
        dds = self.idf.idfobjects["SizingPeriod:DesignDay".upper()]
        dd = [dd for dd in dds if dd.Day_Type.lower() == field]
        if len(dd) > 0:
            for dd in dd:
                # should have found only one design day matching the Day Type
                month = dd.Month
                day = dd.Day_of_Month
                data = str(month) + "/" + str(day)
                ep_start_date = self._date_field_interpretation(data)
                ep_orig = datetime(self.year, 1, 1)
                days_to_speciald = (ep_start_date - ep_orig).days
                duration = 1  # Duration of 1 day
                from_date = self.startDate + timedelta(days=days_to_speciald)
                to_date = from_date + timedelta(days=duration) + timedelta(hours=-1)

                sp_slicer_.loc[from_date:to_date] = True
            return sp_slicer_
        elif not self.strict:
            return sp_slicer_
        else:
            msg = (
                'Could not find a "SizingPeriod:DesignDay" object '
                'needed for schedule "{}" with Day Type "{}"'.format(
                    self.Name, field.capitalize()
                )
            )
            raise ValueError(msg)

            data = [dd[0].Month, dd[0].Day_of_Month]
            date = "/".join([str(item).zfill(2) for item in data])
            date = self._date_field_interpretation(date)
            return lambda x: x.index == date

    def combine(self, other, weights=None, quantity=None):
        """Combine two schedule objects together.

        Args:
            other (Schedule): the other Schedule object to combine with.
            weights (list-like, optional): A list-like object of len 2. If None,
                equal weights are used.
            quantity: scalar value that will be multiplied by self before the
                averaging occurs. This ensures that the resulting schedule
                returns the correct integrated value.

        Returns:
            (Schedule): the combined Schedule object.
        """
        # Check if other is the same type as self
        if not isinstance(other, self.__class__):
            msg = "Cannot combine %s with %s" % (
                self.__class__.__name__,
                other.__class__.__name__,
            )
            raise NotImplementedError(msg)

        # check if the schedule is the same

        if all(self.all_values == other.all_values):
            return self
        if not weights:
            weights = [1, 1]
        new_values = np.average(
            [self.all_values, other.all_values], axis=0, weights=weights
        )

        # the new object's name
        name = "+".join([self.Name, other.Name])

        attr = dict(value=new_values)
        idf = attr.pop("idf", None)
        new_obj = self.__class__(name, idf, **attr)

        return new_obj


def _conjunction(*conditions, logical=np.logical_and):
    """Applies a logical function on n conditions

    Args:
        *conditions:
        logical:
    """
    return functools.reduce(logical, conditions)


def _separator(sep):
    """helper function to return the correct delimiter

    Args:
        sep:
    """
    if sep == "Comma":
        return ","
    elif sep == "Tab":
        return "\t"
    elif sep == "Fixed":
        return None
    elif sep == "Semicolon":
        return ";"
    else:
        return ","


def _how(how):
    """Helper function to return the correct resampler

    Args:
        how:
    """
    if how.lower() == "average":
        return "mean"
    elif how.lower() == "linear":
        return "interpolate"
    elif how.lower() == "no":
        return "max"
    else:
        return "max"