import PIL.Image
import cli.new.format as format
import cli.new.reader as reader
import io
import os
import pathlib
import requests
import shutil
import subprocess

def run(books_library, book_source=None):

    # Get data

    title = reader.required('Title')
    subtitle = reader.optional('Subtitle')
    authors = reader.non_empty_list('Authors')
    author_sort = reader.required('Authors sorting')
    genres = reader.non_empty_list('Genres')
    year = reader.integer('Year')
    lang = reader.choices('Lang', ['fr', 'en', 'de'])
    summary = format.cleanup_text(reader.multi_line('Summary'), lang)
    cover_url = reader.required('Cover url')
    read = reader.choices('Read', ['Read', 'Unread', 'Reading', 'Stopped'])

    # Output paths

    author_path = format.path_part(author_sort)
    title_path = format.path_part(title)

    output_dir = f'{books_library}/{author_path}/{title_path}'
    metadata_path = f'{output_dir}/metadata.toml'
    cover_path = f'{output_dir}/cover.webp'

    if not book_source is None:
        ext = format.extension(book_source)
        book_path = f'{output_dir}/book{ext}'
        book_source_dir = os.path.dirname(os.path.realpath(book_source))
        book_source_new = f'{book_source_dir}/{author_path}-{title_path}.mobi'

    # Metadata

    metadata = f"""title = "{title}"
    subtitle = "{subtitle}"
    authors = {format.list(authors)}
    authorsSort = "{author_sort}"
    genres = {format.list(genres)}
    date = {year}
    summary = \"\"\"
    {summary}
    \"\"\"
    read = "{read}"
    """

    # Ask for confirmation

    print(f'About to create:\n\n- {metadata_path}\n- {cover_path}')
    if not book_source is None:
        print(f'- {book_path}')
        print(f'\nAnd moving:\n\n {book_source},\n -> {book_source_new}.')
    print()

    reader.confirm('OK?')

    # Create files

    pathlib.Path(output_dir).mkdir(parents=True, exist_ok=True)
    download_cover(cover_url, cover_path)
    with open(metadata_path, 'w') as f:
        f.write(metadata)
    if not book_path is None:
        shutil.copyfile(book_source, book_path)
        if format.extension(book_source) in ['mobi', 'azw3']:
            os.rename(book_source, book_source_new)
        else:
            subprocess.run(['ebook-convert', book_source, book_source_new])
        os.remove(book_source)

# Download cover as WEBP
def download_cover(url, path):
    response = requests.get(url, headers={ 'User-Agent': 'python-script' })
    image = PIL.Image.open(io.BytesIO(response.content))
    width, height = image.size
    if width > 300:
        image = image.resize((300, int(300 * height / width)), PIL.Image.LANCZOS)
    image = image.convert('RGB')
    image.save(path, 'WEBP', optimize=True, quality=85)