# -*- coding: utf-8 -*-
""" invenio_tools.recordthesis

"""
from base import THESIS_DIR
from filters import CLEAN_THESIS_DEFENSE
from iterauthors import author_name, iter_author_fields
from itertools import ifilter, ifilterfalse, imap
from recordpubli import RecordPubli


def is_thesis_dir(x):
    """
    Args:
        x (dict): correspond to the field 100 or 700 for one author

    """
    return "e" in x and x["e"] == THESIS_DIR


class RecordThesis(RecordPubli):
    """The MARC record describing a thesis.
    The relation between methods and MARC fields are the following::

        +-----------------------+---------+----------+
        |                       |  CDS    | INSPIREP |
        +-----------------------+---------+----------+
        | these defence         | 500 a   |          |
        | these level           | 502 a   |          |
        | these director        | 700 a   |          |
        | these universities    | 502 b   |          |
        +-----------------------+---------+----------+

    """
    def authors_as_list(self):
        """The list of author(s) signing the publication.

        Returns:
            list: the list is empty when authors are not defined.

        """
        # for a thesis, the author field 700 contains names of author
        # as well as directors. The latter have to be removed.
        df = self[u"700"]

        query = df.e != THESIS_DIR
        df = df.loc[query]

        li = df.a.tolist()

        if len(li) == 1 and li[0] == "":
            li = []

        return li

    def these_defense(self):
        """The defence date for a master/phd thesis.

        Returns:
            unicode:
                * The pattern is ``5 March 2012``.
                * The pattern it is not standardise
                  and can varies between records and between stores.
                * The filter CLEAN_THESIS_DEFENSE is applied.

        """
        val = self._get(u"500", "a")
        return CLEAN_THESIS_DEFENSE(val)

    def these_level(self):
        """The level of the thesis.

        Returns:
            unicode:
                * The value is "master" or "PhD".
                * The value is not standardise and can varies
                  between records and between stores.
                * Empty string when not defined

        """
        return self._get(u"502", "a")

    def these_directors(self):
        """The list of director(s)

        Returns:
            unicode:
                * Names are separated by ``|``.
                * Empty string when it is not defined.

        """
        # for a thesis, the author field 700 field contains
        # names of the director as well as the name of authors
        df = self[u"700"]

        query = df.e == THESIS_DIR
        df = df.loc[query]

        return (u"|".join(df.a) if len(df) > 0 else u"")

    def these_town(self):
        """The town where the thesis took place.

        Returns:
            unicode: empty string when the town is not defined.

        """
        return self._get(u"260", "a")

    def these_universities(self):
        """The university(ies) delivering the thesis diploma.

        Returns:
            list: empty list when university is not defined

        """
        return self._get(u"502", "b", force_list=True)