#!/usr/bin/env python
# coding: utf-8

"""
Tool to detect and delete orphan raw files

"""

from __future__ import unicode_literals, print_function

import argparse
import sys
import os

try:
    input = raw_input
except NameError:
    pass


def _log(msg):
    print('remove-orphan-raws: %s' % msg, file=sys.stderr)


def remove_raw_orphans(dir, pic_exts, raw_exts, batch):
    to_delete = []

    pic_paths_without_ext = set()
    raw_full_paths = []

    for file in os.listdir(dir):
        name, ext = os.path.splitext(file)
        ext = ext[1:].lower()

        if ext in pic_exts:
            pic_paths_without_ext.add(name)
            continue

        if ext in raw_exts:
            raw_full_paths.append(file)
            continue

    for raw in raw_full_paths:
        name = os.path.splitext(raw)[0]

        if name not in pic_paths_without_ext:
            to_delete.append(raw)

    if not to_delete:
        _log('No orphan raws identified')
        return

    if batch:
        delete = True
    else:
        prompt = 'Orphans identified:\n%s\n\nDo you want to delete them? (y/n) ' % '\n'.join(to_delete)
        delete = input(prompt).lower() == 'y'

    if not delete:
        return

    for name in to_delete:
        os.unlink(os.path.join(dir, name))

    _log('Done')


def _split_extensions(ext):
    return [s.strip().lower() for s in ext.split(',')]


if __name__ == '__main__':
    parser = argparse.ArgumentParser(formatter_class=argparse.ArgumentDefaultsHelpFormatter)

    parser.add_argument('-d', '--dir', help='Target directory to search for orphans', default='.')
    parser.add_argument('-p', '--pic-ext',
                        help='Extensions of picture files (comma separated, case insensitive)', default='jpeg,jpg')
    parser.add_argument('-r', '--raw-ext',
                        help='Extension of raw files to be removed (comma separated, case insenstive)',
                        default='nef,cn2')
    parser.add_argument('-b', '--batch',
                        help='Run in batch. No confirmation before deleting files',
                        action='store_true')
    args = parser.parse_args()

    remove_raw_orphans(
        dir=args.dir,
        pic_exts=_split_extensions(args.pic_ext),
        raw_exts=_split_extensions(args.raw_ext),
        batch=args.batch,
    )