"""MIT License

Copyright (c) 2019 David Luevano Alvarado

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
"""
import os

# Project specific imports.
from tirante.chapters_manager import chapters_csv_to_list
from tirante.chapter_images_manager import chapter_images_csv_to_list
from tirante.download_manager import download_chapter


def download_manga(manga_name,
                   manga_dir,
                   manga_data_dir):
    """
    Downloads a whole manga, saving it to subfolders.
    Uses the database already created.
    that's used by the webpage.
    manga_name: Actual name of the manga, as it appears in the webpage.
    manga_dir: Main manga folder in computer, subfolders here will be created.
    manga_data_dir: Main manga data folder in computer.
    NOTE: This updates the manga, downloading the missing chapters
    if they're listed in the database.
    """

    # A better "naming" for the manga, for use with folder creation.
    # As well as the name of the main database.
    m_name = '_'.join(word.lower() for word in manga_name.split())
    m_name_ext = ''.join([m_name, '.csv'])

    # Go to where the database is located.
    os.chdir(manga_data_dir)
    try:
        os.chdir(m_name)
    except FileNotFoundError:
        print(''.join([m_name,
                       ' folder doesn\'t exist.',
                       ' Most likely, the database hasn\'t been created.']))
        raise NameError('Create database first.')

    # Get info of the files in the database.
    data_list_dir = os.listdir()

    # Reads data from the main database.
    if m_name_ext not in data_list_dir:
        print(''.join([m_name,
                       ' database hasn\'t been created.',
                       ' Most likely, the database hasn\'t been created.']))
        raise NameError('Create database first.')
    else:
        chapters_list = chapters_csv_to_list(m_name_ext)

    # Navigate to the main manga dir,
    # and either create or go to manga folder.
    os.chdir(manga_dir)
    try:
        os.mkdir(manga_name)
        os.chdir(manga_name)
    except FileExistsError:
        print(''.join([manga_name,
                       ' folder already exists.']))
        os.chdir(manga_name)

    # Get data of the folders in the manga folder.
    manga_list_dir = os.listdir()

    for chapter in chapters_list:
        # chapter_url = chapter[0]
        chapter_name = chapter[1]
        ch_name_ext = ''.join([chapter_name, '.csv'])

        if chapter_name not in manga_list_dir:
            print(''.join(['Downloading ',
                           chapter_name,
                           ' now.']))
            # First, create the chapter folder.
            os.mkdir(chapter_name)

            # Go to where the database is located.
            os.chdir(manga_data_dir)
            os.chdir(m_name)
            chapter_image_list = chapter_images_csv_to_list(ch_name_ext)

            # Go back to where the manga is going ot be downloaded.
            os.chdir(manga_dir)
            os.chdir(manga_name)
            os.chdir(chapter_name)

            # Download all the chapter images on its respective folder.
            download_chapter(chapter_image_list)

            # Go back one folder to repeat the process
            # for the next chapter.
            os.chdir('..')
        else:
            print(''.join([chapter_name,
                           ' already downloaded.']))