# -*- coding: utf-8 -*-
# Licensed under a 3-clause BSD style license - see LICENSE.rst

''' This module defines custom errors and exceptions used in astropy.coordinates.
'''
from __future__ import (absolute_import, division, print_function,
                        unicode_literals)

from ..utils.exceptions import AstropyWarning

__all__ = ['RangeError', 'BoundsError', 'IllegalHourError',
           'IllegalMinuteError', 'IllegalSecondError', 'ConvertError',
           'IllegalHourWarning', 'IllegalMinuteWarning', 'IllegalSecondWarning']


class RangeError(ValueError):
    """
    Raised when some part of an angle is out of its valid range.
    """


class BoundsError(RangeError):
    """
    Raised when an angle is outside of its user-specified bounds.
    """


class IllegalHourError(RangeError):
    """
    Raised when an hour value is not in the range [0,24).

    Parameters
    ----------
    hour : int, float

    Examples
    --------

    .. code-block:: python

        if not 0 <= hr < 24:
           raise IllegalHourError(hour)
    """
    def __init__(self, hour):
        self.hour = hour

    def __str__(self):
        return "An invalid value for 'hours' was found ('{0}'); must be in the range [0,24).".format(self.hour)


class IllegalHourWarning(AstropyWarning):
    """
    Raised when an hour value is 24.

    Parameters
    ----------
    hour : int, float
    """
    def __init__(self, hour, alternativeactionstr=None):
        self.hour = hour
        self.alternativeactionstr = alternativeactionstr

    def __str__(self):
        message = "'hour' was found  to be '{0}', which is not in range (-24, 24).".format(self.hour)
        if self.alternativeactionstr is not None:
            message += ' ' + self.alternativeactionstr
        return message


class IllegalMinuteError(RangeError):
    """
    Raised when an minute value is not in the range [0,60].

    Parameters
    ----------
    minute : int, float

    Examples
    --------
    
    .. code-block:: python

        if not 0 <= min < 60:
            raise IllegalMinuteError(minute)

    """
    def __init__(self, minute):
        self.minute = minute

    def __str__(self):
        return "An invalid value for 'minute' was found ('{0}'); should be in the range [0,60).".format(self.minute)


class IllegalMinuteWarning(AstropyWarning):
    """
    Raised when a minute value is 60.

    Parameters
    ----------
    minute : int, float
    """
    def __init__(self, minute, alternativeactionstr=None):
        self.minute = minute
        self.alternativeactionstr = alternativeactionstr

    def __str__(self):
        message = "'minute' was found  to be '{0}', which is not in range [0,60).".format(self.minute)
        if self.alternativeactionstr is not None:
            message += ' ' + self.alternativeactionstr
        return message


class IllegalSecondError(RangeError):
    """
    Raised when an second value (time) is not in the range [0,60].

    Parameters
    ----------
    second : int, float

    Examples
    --------

    .. code-block:: python

        if not 0 <= sec < 60:
            raise IllegalSecondError(second)
    """
    def __init__(self, second):
        self.second = second

    def __str__(self):
        return "An invalid value for 'second' was found ('{0}'); should be in the range [0,60).".format(self.second)


class IllegalSecondWarning(AstropyWarning):
    """
    Raised when a second value is 60.

    Parameters
    ----------
    second : int, float
    """
    def __init__(self, second, alternativeactionstr=None):
        self.second = second
        self.alternativeactionstr = alternativeactionstr

    def __str__(self):
        message = "'second' was found  to be '{0}', which is not in range [0,60).".format(self.second)
        if self.alternativeactionstr is not None:
            message += ' ' + self.alternativeactionstr
        return message


# TODO: consider if this should be used to `units`?
class UnitsError(ValueError):
    """
    Raised if units are missing or invalid.
    """


class ConvertError(Exception):
    """
    Raised if a coordinate system cannot be converted to another
    """