"""Track preprocessing."""

from switchboard_consumer.formatters.common import format_cline, format_pline


def preprocess(track):
    """Preprocess track."""
    preprocess_track_cline(track)
    preprocess_track_pline(track)
    track['publishers'] = preprocess_publishers(track.get('publishers'))


def preprocess_track_cline(track):
    """Preprocess product track cLine."""
    track['cLine'] = format_cline(track.get('cLine'))


def preprocess_track_pline(track):
    """Preprocess product track pLine."""
    track['pLine'] = format_pline(track.get('pLine'))


def preprocess_publishers(publishers):
    """Preprocess publishers.

    Takes first publisher in the list if duplicates.
    """
    if isinstance(publishers, list):
        deduped_publishers = {}
        for publisher in publishers:
            lowercase_publisher_name = publisher.get('name').lower()
            if lowercase_publisher_name not in deduped_publishers:
                deduped_publishers[lowercase_publisher_name] = publisher
        return list(deduped_publishers.values())
    else:
        return publishers