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from typing import Union, List
from uuid import uuid4


class SolutionType:
    """

        * HANGOUT - for Hangouts for consumers (hangouts.google.com)

        * NAMED_HANGOUT - for classic Hangouts for Google Workspace users (hangouts.google.com)

        * HANGOUTS_MEET - for Google Meet (meet.google.com)

        * ADD_ON - for 3P conference providers

    """

    HANGOUT = 'eventHangout'
    NAMED_HANGOUT = 'eventNamedHangout'
    HANGOUTS_MEET = 'hangoutsMeet'
    ADD_ON = 'addOn'


class _BaseConferenceSolution:
    """General conference-related information."""

    def __init__(

            self,

            conference_id: str = None,

            signature: str = None,

            notes: str = None,

            _status: str = 'success'

    ):
        """

        :param conference_id:

                The ID of the conference. Optional.

                Can be used by developers to keep track of conferences, should not be displayed to users.



                Values for solution types (see :py:class:`~gcsa.conference.SolutionType`):



                * HANGOUT: unset

                * NAMED_HANGOUT: the name of the Hangout

                * HANGOUTS_MEET: the 10-letter meeting code, for example "aaa-bbbb-ccc"

                * ADD_ON: defined by 3P conference provider



        :param signature:

                The signature of the conference data.

                Generated on server side. Must be preserved while copying the conference data between events,

                otherwise the conference data will not be copied.

                None for a conference with a failed create request.

                Optional for a conference with a pending create request.

        :param notes:

                String of additional notes (such as instructions from the domain administrator, legal notices)

                to display to the user. Can contain HTML. The maximum length is 2048 characters



        :param _status:

                The current status of the conference create request. Should not be set by developer.



                The possible values are:



                * "pending": the conference create request is still being processed.

                * "failure": the conference create request failed, there are no entry points.

                * "success": the conference create request succeeded, the entry points are populated.

                  In this case `ConferenceSolution` with created entry points

                  is stored in the event's `conference_data`. And `ConferenceSolutionCreateRequest` is omitted.



                Create requests are asynchronous. Check ``status`` field of event's ``conference_solution`` to find it's

                status. If the status is ``"success"``, ``conference_solution`` will contain a

                :py:class:`~gcsa.conference.ConferenceSolution` object and you'll be able to access it's field (like

                ``entry_points``). Otherwise (if ``status`` is ``""pending"`` or ``"failure"``), ``conference_solution``

                will contain a :py:class:`~gcsa.conference.ConferenceSolutionCreateRequest` object.



        """
        if notes and len(notes) > 2048:
            raise ValueError('Maximum notes length is 2048 characters.')

        self.conference_id = conference_id
        self.signature = signature
        self.notes = notes
        self.status = _status

    def __eq__(self, other):
        if not isinstance(other, _BaseConferenceSolution):
            return NotImplemented
        elif self is other:
            return True
        else:
            return (
                    self.conference_id == other.conference_id
                    and self.signature == other.signature
                    and self.notes == other.notes
            )


class EntryPoint:
    """Information about individual conference entry points, such as URLs or phone numbers."""

    VIDEO = 'video'
    PHONE = 'phone'
    SIP = 'sip'
    MORE = 'more'

    ENTRY_POINT_TYPES = (VIDEO, PHONE, SIP, MORE)

    def __init__(

            self,

            entry_point_type: str,

            uri: str = None,

            label: str = None,

            pin: str = None,

            access_code: str = None,

            meeting_code: str = None,

            passcode: str = None,

            password: str = None

    ):
        """

        When creating new conference data, populate only the subset of `meeting_code`, `access_code`, `passcode`,

        `password`, and `pin` fields that match the terminology that the conference provider uses.



        Only the populated fields should be displayed.



        :param entry_point_type:

                The type of the conference entry point.



                Possible values are:



                * VIDEO - joining a conference over HTTP.

                  A conference can have zero or one `VIDEO` entry point.

                * PHONE - joining a conference by dialing a phone number.

                  A conference can have zero or more `PHONE` entry points.

                * SIP - joining a conference over SIP.

                  A conference can have zero or one `SIP` entry point.

                * MORE - further conference joining instructions, for example additional phone numbers.

                  A conference can have zero or one `MORE` entry point.

                  A conference with only a `MORE` entry point is not a valid conference.



        :param uri:

                The URI of the entry point. The maximum length is 1300 characters.

                Format:



                * for `VIDEO`, http: or https: schema is required.

                * for `PHONE`, tel: schema is required.

                  The URI should include the entire dial sequence (e.g., tel:+12345678900,,,123456789;1234).

                * for `SIP`, sip: schema is required, e.g., sip:[email protected].

                * for `MORE`, http: or https: schema is required.



        :param label:

                The label for the URI.

                Visible to end users. Not localized. The maximum length is 512 characters.



                Examples:



                * for `VIDEO`: meet.google.com/aaa-bbbb-ccc

                * for `PHONE`: +1 123 268 2601

                * for `SIP`: [email protected]

                * for `MORE`: should not be filled



        :param pin:

                The PIN to access the conference. The maximum length is 128 characters.

        :param access_code:

                The access code to access the conference. The maximum length is 128 characters. Optional.

        :param meeting_code:

                The meeting code to access the conference. The maximum length is 128 characters.

        :param passcode:

                The passcode to access the conference. The maximum length is 128 characters.

        :param password:

                The password to access the conference. The maximum length is 128 characters.

        """

        if entry_point_type and entry_point_type not in self.ENTRY_POINT_TYPES:
            raise ValueError('"entry_point" must be one of {}. {} was provided.'.format(
                ', '.join(self.ENTRY_POINT_TYPES),
                entry_point_type
            ))
        if label and len(label) > 512:
            raise ValueError('Maximum label length is 512 characters.')
        if pin and len(pin) > 128:
            raise ValueError('Maximum pin length is 128 characters.')
        if access_code and len(access_code) > 128:
            raise ValueError('Maximum access_code length is 128 characters.')
        if meeting_code and len(meeting_code) > 128:
            raise ValueError('Maximum meeting_code length is 128 characters.')
        if passcode and len(passcode) > 128:
            raise ValueError('Maximum passcode length is 128 characters.')
        if password and len(password) > 128:
            raise ValueError('Maximum password length is 128 characters.')

        self.entry_point_type = entry_point_type
        self.uri = uri
        self.label = label
        self.pin = pin
        self.access_code = access_code
        self.meeting_code = meeting_code
        self.passcode = passcode
        self.password = password

    def __eq__(self, other):
        if not isinstance(other, EntryPoint):
            return NotImplemented
        elif self is other:
            return True
        else:
            return (
                    self.entry_point_type == other.entry_point_type
                    and self.uri == other.uri
                    and self.label == other.label
                    and self.pin == other.pin
                    and self.access_code == other.access_code
                    and self.meeting_code == other.meeting_code
                    and self.passcode == other.passcode
                    and self.password == other.password
            )

    def __str__(self):
        return "{} - '{}'".format(self.entry_point_type, self.uri)

    def __repr__(self):
        return '<EntryPoint {}>'.format(self.__str__())


class ConferenceSolution(_BaseConferenceSolution):
    """Information about the conference solution, such as Hangouts or Google Meet."""

    def __init__(

            self,

            entry_points: Union[EntryPoint, List[EntryPoint]],

            solution_type: str = None,

            name: str = None,

            icon_uri: str = None,

            conference_id: str = None,

            signature: str = None,

            notes: str = None

    ):
        """

        :param entry_points:

                :py:class:`~gcsa.conference.EntryPoint` or list of :py:class:`~gcsa.conference.EntryPoint` s.

                Information about individual conference entry points, such as URLs or phone numbers.

                All of them must belong to the same conference.

        :param solution_type:

                Solution type. See :py:class:`~gcsa.conference.SolutionType`



                The possible values are:



                * HANGOUT - for Hangouts for consumers (hangouts.google.com)

                * NAMED_HANGOUT - for classic Hangouts for Google Workspace users (hangouts.google.com)

                * HANGOUTS_MEET - for Google Meet (meet.google.com)

                * ADD_ON - for 3P conference providers



        :param name:

                The user-visible name of this solution. Not localized.

        :param icon_uri:

                The user-visible icon for this solution.

        :param conference_id:

                The ID of the conference. Optional.

                Can be used by developers to keep track of conferences, should not be displayed to users.



                Values for solution types (see :py:class:`~gcsa.conference.SolutionType`):



                * HANGOUT: unset

                * NAMED_HANGOUT: the name of the Hangout

                * HANGOUTS_MEET: the 10-letter meeting code, for example "aaa-bbbb-ccc"

                * ADD_ON: defined by 3P conference provider



        :param signature:

                The signature of the conference data.

                Generated on server side. Must be preserved while copying the conference data between events,

                otherwise the conference data will not be copied.

                None for a conference with a failed create request.

                Optional for a conference with a pending create request.

        :param notes:

                String of additional notes (such as instructions from the domain administrator, legal notices)

                to display to the user. Can contain HTML. The maximum length is 2048 characters

        """
        super().__init__(conference_id=conference_id, signature=signature, notes=notes)

        self.entry_points = [entry_points] if isinstance(entry_points, EntryPoint) else entry_points
        self._check_entry_points()

        self.solution_type = solution_type
        self.name = name
        self.icon_uri = icon_uri

    def _check_entry_points(self):
        """

        Checks counts of entry points types.



        * A conference can have zero or one `VIDEO` entry point.

        * A conference can have zero or more `PHONE` entry points.

        * A conference can have zero or one `SIP` entry point.

        * A conference can have zero or one `MORE` entry point.

          A conference with only a `MORE` entry point is not a valid conference.

        """
        if len(self.entry_points) == 0:
            raise ValueError('At least one entry point has to be provided.')

        video_count = 0
        sip_count = 0
        more_count = 0
        for ep in self.entry_points:
            if ep.entry_point_type == EntryPoint.VIDEO:
                video_count += 1
            elif ep.entry_point_type == EntryPoint.SIP:
                sip_count += 1
            elif ep.entry_point_type == EntryPoint.MORE:
                more_count += 1

        if video_count > 1:
            raise ValueError('A conference can have zero or one `VIDEO` entry point.')
        if sip_count > 1:
            raise ValueError('A conference can have zero or one `SIP` entry point.')
        if more_count > 1:
            raise ValueError('A conference can have zero or one `MORE` entry point.')
        if more_count == len(self.entry_points):
            raise ValueError('A conference with only a `MORE` entry point is not a valid conference.')

    def __eq__(self, other):
        if not isinstance(other, ConferenceSolution):
            return NotImplemented
        elif self is other:
            return True
        else:
            return (
                    super().__eq__(other)
                    and self.entry_points == other.entry_points
                    and self.solution_type == other.solution_type
                    and self.name == other.name
                    and self.icon_uri == other.icon_uri
            )

    def __str__(self):
        return '{} - {}'.format(self.solution_type, self.entry_points)

    def __repr__(self):
        return '<ConferenceSolution {}>'.format(self.__str__())


class ConferenceSolutionCreateRequest(_BaseConferenceSolution):
    """

    A request to generate a new conference and attach it to the event.

    The data is generated asynchronously. To see whether the data is present check the status field.

    """

    def __init__(

            self,

            solution_type: str = None,

            request_id: str = None,

            _status: str = None,

            conference_id: str = None,

            signature: str = None,

            notes: str = None

    ):
        """

        :param solution_type:

                Solution type. See :py:class:`~gcsa.conference.SolutionType`



                The possible values are:



                * HANGOUT - for Hangouts for consumers (hangouts.google.com)

                * NAMED_HANGOUT - for classic Hangouts for Google Workspace users (hangouts.google.com)

                * HANGOUTS_MEET - for Google Meet (meet.google.com)

                * ADD_ON - for 3P conference providers



        :param request_id:

                The client-generated unique ID for this request.

                By default it is generated as UUID.

                If you specify request_id manually, they should be unique for every new CreateRequest,

                otherwise request will be ignored.



        :param _status:

                The current status of the conference create request. Should not be set by developer.



                The possible values are:



                * "pending": the conference create request is still being processed.

                * "failure": the conference create request failed, there are no entry points.

                * "success": the conference create request succeeded, the entry points are populated.

                  In this case `ConferenceSolution` with created entry points

                  is stored in the event's `conference_data`. And `ConferenceSolutionCreateRequest` is omitted.

        :param conference_id:

                The ID of the conference. Optional.

                Can be used by developers to keep track of conferences, should not be displayed to users.



                Values for solution types (see :py:class:`~gcsa.conference.SolutionType`):



                * HANGOUT: unset

                * NAMED_HANGOUT: the name of the Hangout

                * HANGOUTS_MEET: the 10-letter meeting code, for example "aaa-bbbb-ccc"

                * ADD_ON: defined by 3P conference provider



        :param signature:

                The signature of the conference data.

                Generated on server side. Must be preserved while copying the conference data between events,

                otherwise the conference data will not be copied.

                None for a conference with a failed create request.

                Optional for a conference with a pending create request.

        :param notes:

                String of additional notes (such as instructions from the domain administrator, legal notices)

                to display to the user. Can contain HTML. The maximum length is 2048 characters

        """
        super().__init__(conference_id=conference_id, signature=signature, notes=notes, _status=_status)
        self.request_id = request_id or uuid4().hex
        self.solution_type = solution_type

    def __eq__(self, other):
        if not isinstance(other, ConferenceSolutionCreateRequest):
            return NotImplemented
        elif self is other:
            return True
        else:
            return (
                    super().__eq__(other)
                    and self.request_id == other.request_id
                    and self.solution_type == other.solution_type
                    and self.status == other.status
            )

    def __str__(self):
        return "{} - status:'{}'".format(self.solution_type, self.status)

    def __repr__(self):
        return '<ConferenceSolutionCreateRequest {}>'.format(self.__str__())