"""
    Contains the class which handles statistics for the
    import of special phrases.
"""
import logging
LOG = logging.getLogger()

class SpecialPhrasesImporterStatistics():
    # pylint: disable-msg=too-many-instance-attributes
    """
        Class handling statistics of the import
        process of special phrases.
    """
    def __init__(self):
        self._set_lang_values_to_0()
        self._set_global_values_to_0()

    def _set_global_values_to_0(self):
        """
            Set all counts for the global
            import to 0.
        """
        self.tables_created = 0
        self.tables_deleted = 0
        self.tables_ignored = 0
        self.global_phrases_invalid = 0

    def _set_lang_values_to_0(self):
        """
            Set all counts for the current
            lang to 0.
        """
        self.lang_phrases_invalid = 0

    def notify_one_phrase_invalid(self):
        """
            Add +1 to the count of invalid entries
            fetched from the wiki.
        """
        self.lang_phrases_invalid += 1
        self.global_phrases_invalid += 1

    def notify_one_table_created(self):
        """
            Add +1 to the count of created tables.
        """
        self.tables_created += 1

    def notify_one_table_deleted(self):
        """
            Add +1 to the count of deleted tables.
        """
        self.tables_deleted += 1

    def notify_one_table_ignored(self):
        """
            Add +1 to the count of ignored tables.
        """
        self.tables_ignored += 1


    def notify_import_done(self):
        """
            Print stats for the whole import process
            and reset all values.
        """
        LOG.info('====================================================================')
        LOG.info('Final statistics of the import:')
        LOG.info('- %s phrases were invalid.', self.global_phrases_invalid)
        if self.global_phrases_invalid > 0:
            LOG.info('  Those invalid phrases have been skipped.')
        LOG.info('- %s tables were ignored as they already exist on the database',
                 self.tables_ignored)
        LOG.info('- %s tables were created', self.tables_created)
        LOG.info('- %s tables were deleted from the database', self.tables_deleted)
        if self.tables_deleted > 0:
            LOG.info('  They were deleted as they are not valid anymore.')

        if self.global_phrases_invalid > 0:
            LOG.warning('%s phrases were invalid and have been skipped during the whole process.',
                        self.global_phrases_invalid)

        self._set_global_values_to_0()

    def notify_current_lang_done(self, lang):
        """
            Print stats for the current lang
            and then reset lang values.
        """
        LOG.info('====================================================================')
        LOG.info('Statistics for the import of %s:', lang)
        LOG.info('- %s phrases were invalid.', self.lang_phrases_invalid)
        if self.lang_phrases_invalid > 0:
            LOG.info('  Those invalid phrases have been skipped.')
        LOG.info('====================================================================')

        if self.lang_phrases_invalid > 0:
            LOG.warning('%s phrases were invalid and have been skipped for the import of lang %s.',
                        self.lang_phrases_invalid, lang)

        self._set_lang_values_to_0()