'''
Reccomendation Engine Example
'''

import json
import os
import random

import ox

with open('json/pandora.json') as f:
    # {"url": "...", "username": "...", "password": "..."}
    PANDORA = json.loads(f.read())

class Pandora:

    def __init__(
        self,
        url=PANDORA['url'],
        username=PANDORA['username'],
        password=PANDORA['password']
    ):
        self.api = ox.API(url)
        self.api.signin(username=username, password=password)

    def find_annotations(self, query, keys):
        # print('FIND ANNOTATIONS', query, keys)
        return self.api.findAnnotations({
            'keys': keys,
            'query': query,
            'range': [0, 1000000]
        })['data']['items']

    def find_entities(self, query, keys):
        # print('FIND ENTITIES', query, keys)
        return self.api.findEntities({
            'keys': keys,
            'query': query,
            'range': [0, 1000000]
        })['data']['items']

    def get(self, id, keys):
        # print('GET', id, keys)
        return self.api.get({
            'id': id,
            'keys': keys
        })['data']

def get_playlists():
    # Get all storylines with tags
    storylines = [{
        'name': entity['name'],
        'tags': entity['tags']
    } for entity in pandora.find_entities({
        'conditions': [
            {'key': 'type', 'operator': '==', 'value': 'storylines'},
        ],
        'operator': '&'
    }, ['id', 'name', 'tags']) if entity.get('tags', [])]
    # Get list of storyline names
    names = list(set([storyline['name'] for storyline in storylines]))
    # Get all clips annotated with storyline references
    clips = [clip for clip in pandora.find_annotations({
        'conditions': [
            {'key': 'layer', 'operator': '==', 'value': 'storylines'}
        ],
        'operator': '&'
    }, ['id', 'in', 'out', 'value']) if clip['value'] in names]
    # Get list of ids for videos with clips
    ids = list(set([clip['id'].split('/')[0] for clip in clips]))
    # Get (and cache) order (and code + name) for each video
    filename = 'json/videos.json'
    if os.path.exists(filename):
        with open(filename) as f:
            videos_ = json.loads(f.read())
            ids_ = [video['id'] for video in videos_]
    else:
        videos_, ids_ = [], []
    videos = sorted(videos_ + [
        pandora.get(id, ['code', 'id', 'order', 'title'])
        for id in ids if not id in ids_
    ], key=lambda video: video['order'])
    with open(filename, 'w') as f:
        f.write(json.dumps(videos, indent=4, sort_keys=True))
    order = {video['id']: video['order'] for video in videos}
    print(order)
    # Sort clips
    clips = sorted(
        clips,
        key=lambda clip: order[clip['id'].split('/')[0]] * 1000000 + clip['in']
    )
    # Return playlists
    return [playlist for playlist in [{
        'name': storyline['name'],
        'tags': storyline['tags'],
        'clips': [
            '{}_{:.3f}-{:.3f}'.format(
                clip['id'].split('/')[0], clip['in'], clip['out']
            ) for clip in clips if clip['value'] == storyline['name']
        ]
    } for storyline in storylines] if playlist['clips']]

def get_videos(user):
    products = []
    for event in user['events']:
        if 'product' in event['data']:
            products.append(event['data']['product'])

def shift_clips(clips):
    index = random.randrange(len(clips))
    return clips[index:] + clips[:index - 1]

if __name__ == '__main__':
    pandora = Pandora()
    playlists = get_playlists()
    with open('playlists.json', 'w') as f:
        f.write(json.dumps(playlists, indent=4, sort_keys=True))
    print(len(playlists), 'playlists')