from __future__ import print_function

import sys
import os
import shutil

import plac
import sputnik

from .. import about


def migrate(path):
    data_path = os.path.join(path, 'data')
    if os.path.isdir(data_path):
        if os.path.islink(data_path):
            os.unlink(data_path)
        else:
            shutil.rmtree(data_path)
    for filename in os.listdir(path):
        if filename.endswith('.tgz'):
            os.unlink(os.path.join(path, filename))


def link(package, path):
    if os.path.exists(path):
        if os.path.isdir(path):
            shutil.rmtree(path)
        else:
            os.unlink(path)

    if not hasattr(os, 'symlink'):  # not supported by win+py27
        shutil.copytree(package.dir_path('data'), path)
    else:
        os.symlink(package.dir_path('data'), path)


@plac.annotations(
    force=("Force overwrite", "flag", "f", bool),
)
def main(data_size='all', force=False):
    path = os.path.dirname(os.path.abspath(__file__))

    if force:
        sputnik.purge('spacy', about.short_version)

    package = sputnik.install('spacy', about.short_version, about.default_model)

    try:
        sputnik.package('spacy', about.short_version, about.default_model)
    except PackageNotFoundException, CompatiblePackageNotFoundException:
        print("Model failed to install. Please run 'python -m "
              "spacy.en.download --force'.", file=sys.stderr)
        sys.exit(1)

    # FIXME clean up old-style packages
    migrate(path)

    print("Model successfully installed.", file=sys.stderr)


if __name__ == '__main__':
    plac.call(main)