from concurrent.futures import ThreadPoolExecutor
import csv
from datetime import datetime

from vcinema_utils.VCinemaFilm import VCinemaFilm
from imdb_utils import IMDbUtils
from bookstack import Bookstack


JACKNET_WIKI_URL = "https://wiki.jacknet.io"

# Page ID of https://wiki.jacknet.io/books/vcinema/page/csv
CSV_PAGE_ID = 11


def get_viewings_csv_attachment_id(token_id, token_secret):
    attachments = Bookstack.get_attachments(JACKNET_WIKI_URL, token_id, token_secret)

    viewings_csv_file_name = "vcinema.csv"

    return next((x['id'] for x in attachments if x['uploaded_to'] == CSV_PAGE_ID and x['name'] == viewings_csv_file_name), None)


def get_vcinema_viewings(token_id, token_secret):
    attachment_id = get_viewings_csv_attachment_id(token_id, token_secret)

    viewings_csv = Bookstack.get_attachment(JACKNET_WIKI_URL, token_id, token_secret, attachment_id)
    viewings_csv = viewings_csv.decode("utf-8")

    viewings_csv_rows = viewings_csv.strip().split("\n")

    viewings = list(csv.DictReader(viewings_csv_rows, quotechar='"'))

    return viewings


def get_vcinema_films(token_id, token_secret):
    viewings = get_vcinema_viewings(token_id, token_secret)
    films = {}

    for viewing in viewings:
        imdb_id = viewing["imdb_id"]
        title = viewing["title"]

        if imdb_id not in films.keys():
            film = VCinemaFilm(imdb_id=imdb_id, title=title)
            films[imdb_id] = film

        date_watched = datetime.strptime(viewing['date_watched'], "%Y-%m-%d")
        season = viewing['season']
        rating = viewing['rating']

        films[imdb_id].add_viewing(date_watched, season, rating)

    return list(films.values())


def add_imdb_data(imdb_id, films, data_fields, progressbar=None):
    movie = IMDbUtils.get_movie(imdb_id)

    for film in films:
        if film.get_imdb_id() == movie.movieID:
            for field_name in data_fields:
                if field_name in movie:
                    film.add_imdb_data(field_name, movie[field_name])

    if progressbar is not None:
        progressbar.next()


def add_imdb_keywords(imdb_id, films, progressbar=None):
    movie = IMDbUtils.get_movie_keywords(imdb_id)

    for film in films:
        if film.get_imdb_id() == movie.movieID:
            if 'keywords' in movie:
                film.add_imdb_data('keywords', movie['keywords'])

    if progressbar is not None:
        progressbar.next()


def add_imdb_data_to_films(films, field_names, progress_bar=None):
    with ThreadPoolExecutor(4) as executor:
        future_imdb_tasks = set()

        if ('keywords' in field_names and len(field_names) > 1) or ('keywords' not in field_names and len(field_names) > 0):
            future_imdb_tasks.update(executor.submit(add_imdb_data, film.get_imdb_id(), films, field_names, progress_bar) for film in films)

        if 'keywords' in field_names:
            future_imdb_tasks.update(executor.submit(add_imdb_keywords, film.get_imdb_id(), films, progress_bar) for film in films)

        progress_bar.max = len(future_imdb_tasks)

    if progress_bar is not None:
        progress_bar.finish()


def filter_films(films: [VCinemaFilm], field: str) -> [VCinemaFilm]:
    films_filtered = {}

    for film in films:
        if film.get_imdb_data(field) is not None:
            field_value = film.get_imdb_data(field)
            if isinstance(field_value, list):
                for value in list(field_value):
                    if value in films_filtered.keys():
                        films_filtered[value] += [film]
                    else:
                        films_filtered[value] = [film]
            else:
                if field_value in films_filtered.keys():
                    films_filtered[field_value] += [film]
                else:
                    films_filtered[field_value] = [film]

    return films_filtered


def get_film_list(films: [VCinemaFilm]) -> str:
    film_links = []

    for film in films:
        film_link = film.get_imdb_link()
        film_links.append(film_link)

    if len(film_links) > 0:
        return "<br>".join(film_links)
    else:
        return ""


def generate_markdown_link(text, url) -> str:
    return "[{}]({})".format(text, url)


def generate_wikipedia_page_link(page_title):
    return generate_markdown_link(page_title, generate_wikipedia_url(page_title))


def generate_wikipedia_url(page_title):
    return "https://en.wikipedia.org/wiki/{}".format(page_title.replace(" ", "_"))