from urllib.parse import quote_plus
from enum import Enum
from common.models import SourceSiteEnum
from django.conf import settings
from common.scraper import GoodreadsScraper, get_spotify_token
import requests
from lxml import html

SEARCH_PAGE_SIZE = 5  # not all apis support page size


class Category(Enum):
    Book = '书籍'
    Movie = '电影'
    Music = '音乐'
    Game = '游戏'
    TV = '剧集'


class SearchResultItem:
    def __init__(self, category, source_site, source_url, title, subtitle, brief, cover_url):
        self.category = category
        self.source_site = source_site
        self.source_url = source_url
        self.title = title
        self.subtitle = subtitle
        self.brief = brief
        self.cover_url = cover_url

    @property
    def verbose_category_name(self):
        return self.category.value

    @property
    def link(self):
        return f"/search?q={quote_plus(self.source_url)}"

    @property
    def scraped(self):
        return False


class Goodreads:
    @classmethod
    def search(self, q, page=1):
        results = []
        search_url = f'https://www.goodreads.com/search?page={page}&q={quote_plus(q)}'
        r = requests.get(search_url)
        if r.url.startswith('https://www.goodreads.com/book/show/'):
            # Goodreads will 302 if only one result matches ISBN
            data, img = GoodreadsScraper.scrape(r.url, r)
            subtitle = f"{data['pub_year']} {', '.join(data['author'])} {', '.join(data['translator'])}"
            results.append(SearchResultItem(Category.Book, SourceSiteEnum.GOODREADS, 
                           data['source_url'], data['title'], subtitle,
                           data['brief'], data['cover_url']))
        else:
            h = html.fromstring(r.content.decode('utf-8'))
            for c in h.xpath('//tr[@itemtype="http://schema.org/Book"]'):
                el_cover = c.xpath('.//img[@class="bookCover"]/@src')
                cover = el_cover[0] if el_cover else None
                el_title = c.xpath('.//a[@class="bookTitle"]//text()')
                title = ''.join(el_title).strip() if el_title else None
                el_url = c.xpath('.//a[@class="bookTitle"]/@href')
                url = 'https://www.goodreads.com' + el_url[0] if el_url else None
                el_authors = c.xpath('.//a[@class="authorName"]//text()')
                subtitle = ', '.join(el_authors) if el_authors else None
                results.append(SearchResultItem(Category.Book, SourceSiteEnum.GOODREADS, url, title, subtitle, '', cover))
        return results


class GoogleBooks:
    @classmethod
    def search(self, q, page=1):
        results = []
        api_url = f'https://www.googleapis.com/books/v1/volumes?q={quote_plus(q)}&startIndex={SEARCH_PAGE_SIZE*(page-1)}&maxResults={SEARCH_PAGE_SIZE}&maxAllowedMaturityRating=MATURE'
        j = requests.get(api_url).json()
        if 'items' in j:
            for b in j['items']:
                title = b['volumeInfo']['title']
                subtitle = f"{b['volumeInfo']['publishedDate']} {', '.join(b['volumeInfo']['authors'])}"
                if 'description' in b['volumeInfo']:
                    brief = b['volumeInfo']['description']
                elif 'textSnippet' in b['volumeInfo']:
                    brief = b["volumeInfo"]["textSnippet"]["searchInfo"]
                else:
                    brief = ''
                category = Category.Book
                url = b['volumeInfo']['infoLink']
                cover = b['volumeInfo']['imageLinks']['thumbnail'] if 'imageLinks' in b['volumeInfo'] else None
                results.append(SearchResultItem(category, SourceSiteEnum.GOOGLEBOOKS, url, title, subtitle, brief, cover))
        return results


class TheMovieDatabase:
    @classmethod
    def search(self, q, page=1):
        results = []
        api_url = f'https://api.themoviedb.org/3/search/multi?query={quote_plus(q)}&page={page}&api_key={settings.TMDB_API3_KEY}&language=zh-CN&include_adult=true'
        j = requests.get(api_url).json()
        for m in j['results']:
            if m['media_type'] in ['tv', 'movie']:
                url = f"https://www.themoviedb.org/{m['media_type']}/{m['id']}"
                if m['media_type'] == 'tv':
                    cat = Category.TV
                    title = m['name']
                    subtitle = f"{m['first_air_date']} {m['original_name']}"
                else:
                    cat = Category.Movie
                    title = m['title']
                    subtitle = f"{m['release_date']} {m['original_title']}"
                cover = f"https://image.tmdb.org/t/p/w500/{m['poster_path']}"
                results.append(SearchResultItem(cat, SourceSiteEnum.TMDB, url, title, subtitle, m['overview'], cover))
        return results


class Spotify:
    @classmethod
    def search(self, q, page=1):
        results = []
        api_url = f"https://api.spotify.com/v1/search?q={q}&type=album&limit={SEARCH_PAGE_SIZE}&offset={page*SEARCH_PAGE_SIZE}"
        headers = {
            'Authorization': f"Bearer {get_spotify_token()}"
        }
        j = requests.get(api_url, headers=headers).json()
        for a in j['albums']['items']:
            title = a['name']
            subtitle = a['release_date']
            for artist in a['artists']:
                subtitle += ' ' + artist['name']
            url = a['external_urls']['spotify']
            cover = a['images'][0]['url']
            results.append(SearchResultItem(Category.Music, SourceSiteEnum.SPOTIFY, url, title, subtitle, '', cover))
        return results


class ExternalSources:
    @classmethod
    def search(self, c, q, page=1):
        results = []
        if c == '' or c is None:
            c = 'all'
        if c == 'all' or c == 'movie':
            results.extend(TheMovieDatabase.search(q, page))
        if c == 'all' or c == 'book':
            results.extend(Goodreads.search(q, page))
            # results.extend(GoogleBooks.search(q, page))
        if c == 'all' or c == 'music':
            results.extend(Spotify.search(q, page))
        return results