#!/usr/bin/env python3
# -*- encoding: utf-8 -*-

import os
import re
import json
import shutil
import filetype
from pathlib import Path
from ._cacheable import get_link_bytes
from ..downloadedData import DownloadedData
from ... import simpleDownloader

COOKIEFILE = Path('imgur.authautologin.cookie.txt')
COOKIE = COOKIEFILE.read_text().strip() if COOKIEFILE.exists() else None

NSFW_LOGIN_WALL = "This page may contain erotic or adult imagery. You'll need to sign in if you still want to view it."
NSFW_LOGIN_WALL2 = "This post may contain erotic or adult imagery."

def works_on(domain):
    return domain in ['i.imgur.com', 'imgur.com', 'm.imgur.com', 'www.imgur.com']

class ImgurCom(object):
    def recognizes(self, link):
        return True
    
    def download(self, link):
        dd = DownloadedData()
        simpleDownloader.cleanCookies()
        simpleDownloader.setCookie('over18', '1')
        bts = b''
        if '/a/' not in link and '.gifv' not in link and '.webm' not in link:
            bts = get_link_bytes(link)
        elif link.endswith('.gifv'):
            bts = get_link_bytes(link[:-4]+'mp4')
        if bts is not None:
            ext = filetype.guess_extension(bts)
            if ext is not None:
                dd.put(link, bts, ext)
            else:
                if '.gifv' in link or '.webm' in link:
                    bts=None
                print(' '*50,end='',flush=True)
                print('\r',end='',flush=True)
                print(' `--> It wasn\'t a single image...',end='',flush=True)
                match = re.match(
                        "(https?)://(www\.)?(i\.|m\.|www\.)?imgur\.com/(?:(a|gallery|r|t)/)?(\w*)/?(\w*)(#[0-9]+)?(\.\w*)?",
                        link,
                        re.IGNORECASE
                )
                tp = match.group(4)
                ky = None
                if tp not in ('r', 't',):
                    ky = match.group(5)
                else:
                    ky = match.group(6)
                if not ky:
                    ky = match.group(5)
                link2 = 'https://imgur.com/a/'+str(ky)+'/all'
                if tp is None or tp=='' or tp=='r':
                    link2=link2.replace('/a/','/')[:-4]
                print('\r',end='',flush=True)
                print(' '*50,end='',flush=True)
                print('\r',end='',flush=True)
                if link2.endswith('/all') or bts is None:
                    print(' `--> Fetching album image list...',end='',flush=True)
                    bts = simpleDownloader.getUrlBytes(link2)
                else:
                    print(' `--> Album image list already fetched...',end='',flush=True)
                print('\r',end='',flush=True)
                if bts is None:
                    print(' '*50,end='',flush=True)
                    print('\r',end='',flush=True)
                    print(' `--> Gallery not found')
                    return DownloadedData()
                html = bts.decode('utf-8')
                if NSFW_LOGIN_WALL in html or NSFW_LOGIN_WALL2 in html:
                    print(' '*50,end='',flush=True)
                    print(' [has logged in]',end='',flush=True)
                    print('\r',end='',flush=True)
                    print(' `--> Fetching album image list with login...',end='',flush=True)
                    simpleDownloader.setCookie('authautologin', COOKIE)
                    bts = simpleDownloader.getUrlBytes(link2)
                    simpleDownloader.delCookie('authautologin')
                    html = bts.decode('utf-8')
                    print('\r',end='',flush=True)
                if 'widgetFactory.mergeConfig' not in html:
                    raise ValueError("imgur has changed templates")
                if "('gallery', {" not in html:
                    raise ValueError("imgur has changed templates")
                # print(link2+' ')
                albnfo = json.loads(
                    list(
                        filter(
                            lambda f: f.startswith('image'),
                            map(
                                str.strip,
                                list(
                                    filter(
                                        lambda f: f.startswith("('gallery', {"),
                                        html.split('widgetFactory.mergeConfig')
                                    )
                                )[0]
                                .strip()
                                .splitlines()
                            )
                        )
                    )[0][6:-1].strip()[1:].strip()
                )
                imgs = [albnfo]
                if 'album_images' in albnfo:
                    imgs = albnfo['album_images']['images']
                intermediarySaves = len(imgs)>=10
                if intermediarySaves:
                    if not os.path.isdir('tmp'):
                        os.makedirs('tmp')
                    if os.path.isfile('tmp/link.url'):
                        with open('tmp/link.url') as f:
                            svdlnk = f.read()
                            if svdlnk == link:
                                dd.loadfrom('tmp')
                            else:
                                shutil.rmtree('tmp')
                                os.makedirs('tmp')
                    with open('tmp/link.url', 'w') as f:
                        f.write(link)
                for seq, img in enumerate(imgs):
                    print(' '*50,end='',flush=True)
                    print('\r',end='',flush=True)
                    print(' `--> Album image #%03d of %03d'%(seq+1,len(imgs)),end='',flush=True)
                    print('\r',end='',flush=True)
                    if img['ext'] == '.gifv':
                        img['ext'] = '.mp4'
                    durl = 'http://i.imgur.com/'+img['hash']+img['ext']
                    if durl in dd.storedLinks():
                        continue
                    imb = get_link_bytes(durl)
                    if imb is None:
                        print()
                        print('Album part failed')
                        print()
                        simpleDownloader.cleanCookies()
                        return None
                    dd.put(durl, imb, img['ext'][1:])
                    if intermediarySaves and seq%10 == 0:
                        dd.into('tmp')
                    print('\r',end='',flush=True)
                if os.path.isdir('tmp'):
                    shutil.rmtree('tmp')
        simpleDownloader.cleanCookies()
        print('\r',end='',flush=True)
        print(' '*79,end='',flush=True)
        print('\r',end='',flush=True)
        return dd
    
def get_class():
    return ImgurCom