# -*- coding: utf-8 -*-
"""
    Copyright (C) 2017 Sebastian Golasch (plugin.video.netflix)
    Copyright (C) 2018 Caphm (original implementation module)
    Various timeline markers provided by Netflix

    SPDX-License-Identifier: MIT
    See LICENSES/MIT.md for more information.
"""
SKIPPABLE_SECTIONS = {'credit': 30076, 'recap': 30077}
OFFSET_WATCHED_TO_END = 'watchedToEndOffset'
OFFSET_CREDITS = 'creditsOffset'


def get_timeline_markers(metadata):
    """Extract all timeline markers from a set of metadata"""
    markers = {}
    try:
        markers.update(get_offset_markers(metadata))
    except KeyError:
        pass
    try:
        markers.update(get_section_markers(metadata))
    except KeyError:
        pass

    return markers


def get_offset_markers(metadata):
    """Extract offset timeline markers from metadata if they exist"""
    return {
        marker: metadata[marker]
        for marker in [OFFSET_CREDITS, OFFSET_WATCHED_TO_END]
        if metadata.get(marker) is not None
    }


def get_section_markers(metadata):
    """Extract section start and end markers from metadata if they exist"""
    if not metadata.get('skipMarkers'):
        return {}

    return {
        section: {
            'start': int(metadata['skipMarkers'][section]['start'] /
                         1000),
            'end': int(metadata['skipMarkers'][section]['end'] / 1000)
        }
        for section in SKIPPABLE_SECTIONS
        if any(i for i in list(metadata['skipMarkers'][section].values()))
    }