import requests
from bs4 import BeautifulSoup
from lxml import etree
import os 
import csv  
import sys

if len(sys.argv) > 1:
    IMG_N = int(sys.argv[1])
else:
    IMG_N = 50

def get_page_xpath_result(url, xpath_str):
    HEADERS = {'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/39.0.2171.95 Safari/537.36'}
    page = requests.get(url, headers=HEADERS)
    soup = BeautifulSoup(page.content, "html.parser")
    dom = etree.HTML(str(soup))
    return dom.xpath(xpath_str)

def createDirectory(path):
    isExist = os.path.exists(path)
    if not isExist:
        os.makedirs(path) 
        print(f"The {path} is created!")

n = IMG_N // 50

for i in range(n):
    ROOT_URL = f'https://myanimelist.net/character.php?limit={(i)*50}'
    print(ROOT_URL)
    
    character_links = get_page_xpath_result(ROOT_URL, '//div[@class="information di-ib mt24"]/a/@href')
    character_names = get_page_xpath_result(ROOT_URL, '//div[@class="information di-ib mt24"]/a')
    character_names = [link.text for link in character_names]

    character_img_urls = [get_page_xpath_result(link, '//td/div/a/img/@data-src')[0] 
                        for link in character_links]

    createDirectory('./data')
    createDirectory('./data/images')

    csv_header = ['name', 'file', 'link']
    data_rows = []

    for name, url, link in zip(character_names, character_img_urls, character_links):    
        img_data = requests.get(url).content
        img_path = f'./data/images/{name}.jpg'
        img_path_exist = os.path.exists(img_path)

        if not img_path_exist:
            with open(img_path, 'wb') as handler:
                handler.write(img_data)
            handler.close()
            print(f'{name}.jpg downloaded')

            data_row = [name, f'{name}.jpg', link]
            data_rows.append(data_row)

    csv_path = './data/anime-faces.csv'
    if len(data_rows) > 0:
        csv_file_exist = os.path.exists(csv_path)
        with open(csv_path, 'a', encoding='UTF8') as f:
            writer = csv.writer(f)
            if not csv_file_exist:
                writer.writerow(csv_header)
            writer.writerows(data_rows)

print("finish!")