'''
Pull all of the files in nested directories into the current directory.
'''
import argparse
import os
import sys

from voussoirkit import interactive
from voussoirkit import pathclass
from voussoirkit import pipeable
from voussoirkit import spinal

def filepull(pull_from='.', autoyes=False):
    start = pathclass.Path(pull_from)
    files = [file for d in start.listdir_directories() for file in d.walk_files()]

    if len(files) == 0:
        pipeable.stderr('No files to move')
        return 1

    duplicate_count = {}
    for f in files:
        basename = f.basename
        duplicate_count.setdefault(basename, [])
        duplicate_count[basename].append(f.absolute_path)

    duplicates = [
        '\n'.join(sorted(copies))
        for (basename, copies) in duplicate_count.items()
        if len(copies) > 1
    ]
    duplicates = sorted(duplicates)
    if len(duplicates) > 0:
        raise Exception('duplicate names:\n' + '\n'.join(duplicates))

    for f in files:
        pipeable.stdout(f.basename)

    if autoyes or interactive.getpermission(f'Move {len(files)} files?'):
        for f in files:
            local = os.path.join('.', f.basename)
            os.rename(f, local)
        return 0
    else:
        return 1

def filepull_argparse(args):
    return filepull(pull_from=args.pull_from, autoyes=args.autoyes)

def main(argv):
    parser = argparse.ArgumentParser()

    parser.add_argument('pull_from', nargs='?', default='.')
    parser.add_argument('-y', '--yes', dest='autoyes', action='store_true')
    parser.set_defaults(func=filepull_argparse)

    args = parser.parse_args(argv)
    return args.func(args)

if __name__ == '__main__':
    raise SystemExit(main(sys.argv[1:]))