from dataclasses import dataclass, field
from datetime import datetime
from operator import itemgetter
from typing import Any, Dict, List

from stats_model import StatsModel


@dataclass(kw_only=True)
class BuildQueueStatsModel(StatsModel):
    """Stats model built around calculating stats from your currently queued posts"""
    operation: str = 'build_queue_stats'

    # Queued posts (both original and not original), sorted in publish order.
    ordered_queue: List[Dict[str, Any]] = field(init=False)

    def __post_init__(self):
        super().__post_init__()
        self.most_popular_tags = self.determine_most_popular_tags('post_count')
        self.ordered_queue = self.determine_ordered_queue()

    def determine_ordered_queue(self) -> List[Dict[str, Any]]:
        full_post_map = self.original_post_map | self.unoriginal_post_map

        post_list: List[Dict[str, Any]] = []
        for post_key in full_post_map:
            post = full_post_map[post_key]

            if 'scheduled_publish_time' not in post or not post['scheduled_publish_time']:
                print('WARNING: Queued post found without publish time. Huh?')

            queued_date_time: datetime = datetime.fromtimestamp(
                post['scheduled_publish_time'])
            post_list.append({
                'post_url': post['post_url'],
                'tags': post['tags'],
                'publish_date_time': queued_date_time
            })

        # https://stackoverflow.com/a/73050
        sorted_list = sorted(post_list, key=itemgetter('publish_date_time'))

        # https://stackoverflow.com/a/522578
        for i, post in enumerate(sorted_list):
            post['queue_order'] = i + 1

        return sorted_list