#!usr/bin/env python
# -*- coding: utf8 -*-
#
# Author: William N. Havard
#

import os
import pandas as pd

def _raw_filename(path):
    return os.path.splitext(os.path.basename(path))[0]

def _list_duplicated(list_):
    return list(set([x for x in list_ if list_.count(x) > 1]))

def walk_dir(path, ext='', return_full_path=True):
    files = []
    for p, d, f in os.walk(path):
        for ff in f:
            if ff.endswith(ext):
                path_suffix = p.replace(os.path.commonprefix([path, p]), '')
                if return_full_path:
                    files.append(os.path.join(path, path_suffix, ff))
                else:
                    files.append(os.path.join(path_suffix, ff))
    return sorted(files)

def main():
    RECORDINGS = './recordings/raw'
    ANNOTATIONS_CHA = './annotations/cha/raw'
    METADATA = './metadata'

    assert all(map(os.path.exists, [RECORDINGS, ANNOTATIONS_CHA, METADATA])), IOError("Run me from the project's root!")

    wav_files = list(map(_raw_filename, walk_dir(RECORDINGS, ext='.wav', return_full_path=False)))
    cha_files = list(map(_raw_filename, walk_dir(ANNOTATIONS_CHA, ext='.cha', return_full_path=False)))
    metadata = pd.read_csv(os.path.join(METADATA, 'recordings.csv'))
    metadata['recording_filename_raw'] = metadata['recording_filename'].apply(_raw_filename)

    # Check there are no duplicate WAV or CHA files
    assert not len(_list_duplicated(wav_files)), \
        ValueError('Duplicate WAV files! ({})'.format(_list_duplicated(wav_files)))
    assert not len(_list_duplicated(cha_files)), \
        ValueError('Duplicate CHA files! ({})'.format(_list_duplicated(cha_files)))

    # Check that each WAV files is mapped to a CHA file and vice-versa
    assert set(wav_files).issubset(set(cha_files)), \
        ValueError('Missing CHA files for some WAV files!\n{}'.
                   format('\n\t- '.join(sorted(set(wav_files)-set(cha_files)))))
    assert set(cha_files).issubset(set(wav_files)), \
        ValueError('Missing WAV files for some CHA files!\n{}'.
                   format('\n\t- '.join(sorted(set(cha_files)-set(wav_files)))))

    # Check that each WAV files appears in the metadata and vice-versa
    assert set(metadata['recording_filename_raw']).issubset(set(wav_files)), \
        ValueError('Missing WAV files that are mentioned in the metadata!\n{}'.
                   format('\n\t- '.join(sorted(set(wav_files)-set(metadata['recording_filename_raw'])))))
    assert set(wav_files).issubset(set(metadata['recording_filename_raw'])), \
        ValueError('Missing `recording_filename_raw` in metadata corresponding to WAV files found in ./recordings!\n{}'.
                   format('\n\t- '.join(sorted(set(metadata['recording_filename_raw'])-set(wav_files)))))

    print('Everything is looking good. Congrats!')

if __name__ == '__main__':
    main()