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import json
import os.path
import pickle
import yaml
import re


try:
    import nltk
    def tokenize(
            text,
    ):
        tokens = ' '.join(nltk.word_tokenize(text)).replace('``', '"').replace("''", '"').split()
        return tokens

    from nltk.tokenize.treebank import TreebankWordDetokenizer
    def detokenize(text: str):
        tokens = text.split()

        text = TreebankWordDetokenizer().detokenize(tokens)
        text = text.replace(' . ', '. ')
        return text
except Exception:
    print('-> Cannot import nltk')


def is_disjoint(
        span1,
        span2,
):
    """
    check joint span for exclude spans
    :param span1:
    :param span2:
    :return:
    """
    return (span1[0] - span2[1] + 1) * (span2[0] - span1[1] + 1) < 0


def remove_accent(text):
    text = re.sub(r'[àáạảãâầấậẩẫăằắặẳẵ]', 'a', text)
    text = re.sub(r'[ÀÁẠẢÃĂẰẮẶẲẴÂẦẤẬẨẪ]', 'A', text)
    text = re.sub(r'[èéẹẻẽêềếệểễ]', 'e', text)
    text = re.sub(r'[ÈÉẸẺẼÊỀẾỆỂỄ]', 'E', text)
    text = re.sub(r'[ìíịỉĩ]', 'i', text)
    text = re.sub(r'[ÌÍỊỈĨ]', 'I', text)
    text = re.sub(r'[òóọỏõôồốộổỗơờớợởỡ]', 'o', text)
    text = re.sub(r'[ÒÓỌỎÕÔỒỐỘỔỖƠỜỚỢỞỠ]', 'O', text)
    text = re.sub(r'[ùúụủũưừứựửữ]', 'u', text)
    text = re.sub(r'[ƯỪỨỰỬỮÙÚỤỦŨ]', 'U', text)
    text = re.sub(r'[ỳýỵỷỹ]', 'y', text)
    text = re.sub(r'[ỲÝỴỶỸ]', 'Y', text)
    text = re.sub(r'đ', 'd', text)
    text = re.sub(r'Đ', 'D', text)
    return text


def remove_timbre(text):
    text = re.sub(r'[àáạảã]', 'a', text)
    text = re.sub(r'[ÀÁẠẢÃ]', 'A', text)

    text = re.sub(r'[âầấậẩẫ]', 'â', text)
    text = re.sub(r'[ÂẦẤẬẨẪ]', 'Â', text)

    text = re.sub(r'[ăằắặẳẵ]', 'ă', text)
    text = re.sub(r'[ĂẰẮẶẲẴ]', 'Ă', text)

    text = re.sub(r'[èéẹẻẽ]', 'e', text)
    text = re.sub(r'[ÈÉẸẺẼ]', 'E', text)

    text = re.sub(r'[êềếệểễ]', 'ê', text)
    text = re.sub(r'[ÊỀẾỆỂỄ]', 'Ê', text)

    text = re.sub(r'[ìíịỉĩ]', 'i', text)
    text = re.sub(r'[ÌÍỊỈĨ]', 'I', text)

    text = re.sub(r'[òóọỏõ]', 'o', text)
    text = re.sub(r'[ÒÓỌỎÕ]', 'O', text)

    text = re.sub(r'[ôồốộổỗ]', 'ô', text)
    text = re.sub(r'[ÔỒỐỘỔỖ]', 'Ô', text)

    text = re.sub(r'[ơờớợởỡ]', 'ơ', text)
    text = re.sub(r'[ƠỜỚỢỞỠ]', 'Ơ', text)

    text = re.sub(r'[ùúụủũ]', 'u', text)
    text = re.sub(r'[ÙÚỤỦŨ]', 'U', text)

    text = re.sub(r'[ưừứựửữ]', 'ư', text)
    text = re.sub(r'[ƯỪỨỰỬỮ]', 'Ư', text)

    text = re.sub(r'[ỳýỵỷỹ]', 'y', text)
    text = re.sub(r'[ỲÝỴỶỸ]', 'Y', text)

    text = re.sub(r'đ', 'd', text)
    text = re.sub(r'Đ', 'D', text)

    return text



def get_mentions(ner_tags, tokens, ):
    spans = []
    prev_tag = None
    s_pos = None
    for i, tag in enumerate(ner_tags):
        if tag == 'O':
            if prev_tag is not None and s_pos is not None:
                # spans.append(([s_pos, i], prev_tag))
                spans.append({
                    'span': [s_pos, i],
                    'tag': prev_tag,
                    'text': ' '.join(tokens[s_pos:i]),
                })

            prev_tag = None
            s_pos = None
        elif tag.startswith('B'):
            if prev_tag is not None and s_pos is not None:
                # spans.append(([s_pos, i], prev_tag))
                spans.append({
                    'span': [s_pos, i],
                    'tag': prev_tag,
                    'text': ' '.join(tokens[s_pos:i]),
                })

            s_pos = i
            prev_tag = tag[2:]
        else:
            cur_tag = tag[2:]
            if prev_tag is not None and prev_tag != cur_tag and s_pos is not None:
                # if prev_tag is not None and s_pos is not None:
                #     spans.append(([s_pos, i], prev_tag))
                spans.append({
                    'span': [s_pos, i],
                    'tag': prev_tag,
                    'text': ' '.join(tokens[s_pos:i]),
                })
                prev_tag = None
                s_pos = None

        if i == len(ner_tags) - 1 and prev_tag is not None and s_pos is not None:
            # spans.append(([s_pos, i + 1], prev_tag))
            spans.append({
                'span': [s_pos, i + 1],
                'tag': prev_tag,
                'text': ' '.join(tokens[s_pos: i + 1])
            })

    return spans


def mentions2tags(
        tokens,
        mentions,
):
    tags = ['O'] * len(tokens)
    for mention in mentions:
        mention_tag = mention['tag']
        span = mention['span']
        if mention_tag != 'O':
            mention_tags = [f'B-{mention_tag}'] + [f'I-{mention_tag}'] * (span[1] - span[0] - 1)
        else:
            mention_tags = ['O'] * (span[1] - span[0])
        tags[span[0]: span[1]] = mention_tags
    return tags


def load_yaml(fn):
    with open(fn, mode='r', encoding='utf8') as f:
        config = yaml.safe_load(f)
    return config


def load_json(fn):
    with open(fn, mode='r', encoding='utf8') as f:
        data = json.load(f)
    return data


def load_jsonl(fn, num_max_lines=None,):
    data = []
    i = 0
    with open(fn, mode='r', encoding='utf8') as f:
        for line in f:
            data.append(json.loads(line))
            i += 1
            if num_max_lines is not None and i == num_max_lines:
                break
    return data


def load_jsonl_generator(fn, num_max_lines=None,):
    i = 0
    with open(fn, mode='r', encoding='utf8') as f:
        for line in f:
            try:
                item = json.loads(line)
                yield item
                i += 1
                if num_max_lines is not None and i == num_max_lines:
                    break
            except Exception as e:
                print(f'-> error {e} in line content:`\n{line}\n`')


def load_jsonl_by_batch(
        fn,
        bs,
):
    batch = []
    with open(fn, mode='r', encoding='utf8', errors='surrogateescape') as f:
        for line in f:
            try:
                item = json.loads(line)
                batch.append(item)
            except Exception as e:
                print(e)
                # print(line)
                print('#' * 10)

            if len(batch) == bs:
                yield batch
                batch = []

    if len(batch) > 0:
        yield batch


def load_text_by_batch(
        fn,
        bs,
):
    batch = []
    with open(fn, mode='r', encoding='utf8', errors='surrogateescape') as f:
        for line in f:
            batch.append(line.strip())

            if len(batch) == bs:
                yield batch
                batch = []

    if len(batch) > 0:
        yield batch


def dump_json(data, fn, indent=None,):
    with open(fn, mode='w', encoding='utf8') as f:
        json.dump(data, f, ensure_ascii=False, indent=indent,)


def dump_jsonl(data: list, fn,):
    with open(fn, mode='w', encoding='utf8') as f:
        for item in data:
            f.write(json.dumps(item, ensure_ascii=False))
            f.write('\n')


def convert_jsonl2jsonl_gz(
        input_path,
        output_path,
):
    import gzip
    with gzip.open(output_path, mode='wb',) as f:
        for batch in load_jsonl_by_batch(
            fn=input_path,
            bs=1000,
        ):
            for item in batch:
                f.write((json.dumps(item, ensure_ascii=False,) + '\n').encode('utf8'))
                # f.write('\n')


def convert_jsonl2jsonl_gz_in_dir(
        input_dir,
        output_dir=None,
):
    if output_dir is None:
        output_dir = input_dir
    fns = [
        fn for fn in os.listdir(input_dir)
        if fn.endswith('.jsonl')
    ]
    for fn in fns:
        print(f'-> compressing {fn}')
        convert_jsonl2jsonl_gz(
            input_path=os.path.join(input_dir, fn),
            output_path=os.path.join(output_dir, fn + '.gz'),
        )


def dump_jsonl_gz(
        data,
        output_path,
):
    import gzip
    with gzip.open(output_path, mode='wb') as f:
        for item in data:
            f.write((json.dumps(item, ensure_ascii=False,) + '\n').encode('utf8'))


def load_jsonl_gz(
        fn,
        num_max_lines=None,
        num_workers=1,
):
    if num_workers == 1:
        import gzip
    else:
        import mgzip as gzip
    data = []
    i = 0
    with (gzip.open(fn, mode='rb') if num_workers == 1 else gzip.open(fn, mode='rb', thread=num_workers)) as f:
        for line in f:
            try:
                item = json.loads(line)
                data.append(item)
                i += 1
                if num_max_lines is not None and i == num_max_lines:
                    break
            except Exception as e:
                print(e)

    return data


def load_jsonl_gz_generator(
        fn,
        num_max_lines=None,
        num_workers=1,
):
    if num_workers == 1:
        import gzip
    else:
        import mgzip as gzip
    i = 0
    with (gzip.open(fn, mode='rb') if num_workers == 1 else gzip.open(fn, mode='rb', thread=num_workers)) as f:
        try:
            for line in f:
                try:
                    item = json.loads(line)
                    yield item
                    i += 1
                    if num_max_lines is not None and i == num_max_lines:
                        break
                except Exception as e:
                    print(e)
        except Exception as e_file:
            print(f'-> error: {e_file}')


def load_jsonl_or_jsonl_gz(
        fn,
        num_max_lines=None,
        num_workers=1,
):
    from functools import partial
    if fn.endswith('.jsonl'):
        load_func = load_jsonl
    elif fn.endswith('.jsonl.gz'):
        load_func = partial(load_jsonl_gz, num_workers=num_workers,)
    else:
        raise NotImplementedError()
    return load_func(fn, num_max_lines=num_max_lines,)


def load_jsonl_or_jsonl_gz_generator(
        fn,
        num_max_lines=None,
        num_workers=1,
):
    from functools import partial
    if fn.endswith('.jsonl'):
        load_func = load_jsonl_generator
    elif fn.endswith('.gz'):
        load_func = partial(load_jsonl_gz_generator, num_workers=num_workers,)
    else:
        raise NotImplementedError()
    for item in load_func(fn, num_max_lines=num_max_lines):
        yield item


def load_jsonl_gz_by_batch(
        fn,
        bs,
        num_workers=1,
):
    if num_workers == 1:
        import gzip
    else:
        import mgzip as gzip
    batch = []

    with (gzip.open(fn, mode='rb') if num_workers == 1 else gzip.open(fn, mode='rb', thread=num_workers)) as f:
        try:
            for line in f:
                try:
                    item = json.loads(line)
                    batch.append(item)
                    if len(batch) == bs:
                        yield batch
                        batch = []

                except Exception as e:
                    print(e)
                    print(line)
                    print('#' * 10)
        except Exception as e:
            print(e)

    if len(batch) > 0:
        yield batch


def load_jsonl_or_jsonl_gz_by_batch(fn, bs, num_workers=1,):
    from functools import partial
    if fn.endswith('.jsonl'):
        load_func = load_jsonl_by_batch
    elif fn.endswith('.jsonl.gz'):
        load_func = partial(load_jsonl_gz_by_batch, num_workers=num_workers,)
    else:
        raise NotImplementedError()

    for batch in load_func(fn, bs):
        yield batch


def get_load_func(
        fn,
):
    if fn.endswith('.jsonl'):
        load_func = load_jsonl_by_batch
    elif fn.endswith('.jsonl.gz'):
        load_func = load_jsonl_gz_by_batch
    else:
        raise NotImplementedError()
    return load_func


def load_text_gz(
        fn,
        max_lines=None,
        num_workers=1,
):
    if num_workers == 1:
        import gzip
    else:
        import mgzip as gzip
    data = []
    n = 0

    with (gzip.open(fn, mode='rb') if num_workers == 1 else gzip.open(fn, mode='rb', thread=num_workers)) as f:
        for line in f:
            n += 1
            data.append(line.decode('utf8'))

            if max_lines is not None and n >= max_lines:
                break
    return data


def load_text_gz_generator(fn, num_max_lines=None, num_workers=1,):
    if num_workers == 1:
        import gzip
    else:
        import mgzip as gzip
    n = 0

    with (gzip.open(fn, mode='rb') if num_workers == 1 else gzip.open(fn, mode='rb', thread=num_workers)) as f:
        for line in f:
            n += 1
            yield line.decode('utf8')

            if num_max_lines is not None and n >= num_max_lines:
                break


def dump_pickle(data, fn):
    with open(fn, mode='wb') as f:
        pickle.dump(data, f)


def load_pickle(fn):
    with open(fn, mode='rb',) as f:
        data = pickle.load(f)
    return data


def load_text(fn):
    data = []
    with open(fn, mode='r', encoding='utf8') as f:
        for line in f:
            line = line.strip()
            if line:
                data.append(line)
    return data


def load_text_generator(fn, num_max_lines=None,):
    n = 0
    with open(fn, mode='r', encoding='utf8') as f:
        for line in f:
            n += 1
            line = line.strip()
            yield line
            if num_max_lines is not None and n == num_max_lines:
                break


def load_text_or_text_gz_generator(fn, num_max_lines=None, num_workers=1,):
    from functools import partial
    if fn.endswith('.gz'):
        load_func = partial(load_text_gz_generator, num_workers=num_workers,)
    else:
        load_func = load_text_generator

    for item in load_func(fn, num_max_lines=num_max_lines):
        yield item


def load_zst_generator(fn, num_max_lines=None):
    import zstandard as zstd
    import io
    n = 0

    DCTX = zstd.ZstdDecompressor(max_window_size=2 ** 31)
    with zstd.open(fn, mode='rb', dctx=DCTX) as zfh, \
        io.TextIOWrapper(zfh) as iofh:
        for line in iofh:
            line = line.strip()
            n += 1
            yield line

            if num_max_lines is not None and n == num_max_lines:
                break


def load_zst_jsonl_generator(fn, num_max_lines=None):
    import zstandard as zstd
    import io
    import json
    n = 0

    DCTX = zstd.ZstdDecompressor(max_window_size=2 ** 31)
    with zstd.open(fn, mode='rb', dctx=DCTX) as zfh, \
            io.TextIOWrapper(zfh) as iofh:
        for line in iofh:
            line = line.strip()
            line = json.loads(line)
            n += 1
            yield line

            if num_max_lines is not None and n == num_max_lines:
                break


def write_text(data, fn):
    with open(fn, mode='w', encoding='utf8') as f:
        for item in data:
            f.write(item)
            f.write('\n')


def split_jsonl(fn, n_parts=10,):
    data = load_jsonl(fn)
    n = len(data)
    bs = (n - 1) // n_parts + 1
    for i in range(n_parts):
        dump_jsonl(data[i * bs: (i + 1) * bs], f'{fn}.part{i}')


def count_file_lines(file_path: str) -> int:
    import subprocess
    if file_path.endswith('.gz'):
        ps = subprocess.Popen(('zcat', file_path), stdout=subprocess.PIPE,)
        output = subprocess.check_output(["wc", "-l"], stdin=ps.stdout)
    else:
        output = subprocess.check_output(["wc", "-l", file_path])
    num_lines = int(output.split()[0])
    return num_lines


def mask_number(
        text,
        tag,
):
    if tag == 'num.phone' and text.isdigit():
        return '<num.phone>'

    text = re.sub(r'\d+([\.,]?\d+)*', '<number>', text)
    return text


### process ner data ####

def load_conll(fn, sep='\t'):
    with open(fn, mode='r', encoding='utf8') as f:
        text = f.read()

    text = text.strip()
    if text == '':
        return []

    data = []

    for sent_text in re.split(r'\n{2,}', text.strip()):
        sent_lines = re.split(r'\n', sent_text)
        sent = []
        for line in sent_lines:
            line = line.strip('\n')
            if line == '':
                continue
            parts = line.split(sep)
            if len(parts) > 0:
                sent.append(parts)

        if len(sent) > 0:
            data.append(sent)
            sent = []
    return data


def unique_data(
        data,
):
    results = []
    unique_info = set()
    for item in data:
        info = (
            ' '.join(item['tokens']),
            ' '.join(item['tags'])
        )
        if info not in unique_info:
            unique_info.add(info)
            results.append(item)
    print(f'-> Deduplicate: from {len(data)} -> {len(results)}')
    return results


def identify(
        data,
        prefix,
):
    for i, item in enumerate(data):
        item['id'] = f'{prefix}_{i:06d}'


def split_ner_data(
        data,
        test_size=0.1,
        seed=42,
        test=False,
):

    import random
    data = unique_data(data)
    random.seed(seed)
    from collections import defaultdict
    negative_samples = []
    samples = []
    entity_tag2idxs = defaultdict(set)

    entity_values = set()
    entity_tag_values = set()

    for item in data:
        entities = get_mentions(
            ner_tags=item['tags'],
            tokens=item['tokens'],
        )
        for entity in entities:
            entity_values.add(entity['text'])
            entity_tag_values.add((entity['text'], entity['tag']))
        if len(entities) == 0:
            negative_samples.append(item)
            item['negative'] = True
        else:
            item['negative'] = False
            idx = len(samples)
            samples.append(item)
            for entity in entities:
                entity_tag2idxs[entity['tag']].add(idx)

    entity_tag2idxs = {tag: list(idxs) for tag, idxs in entity_tag2idxs.items()}

    train_samples = []
    dev_samples = []
    test_samples = []

    n_negative_samples = len(negative_samples)
    train_pos_idxs = set()
    dev_pos_idxs = set()
    test_pos_idxs = set()

    selected_idxs = set()
    for entity_tag, idxs in entity_tag2idxs.items():
        idxs = [i for i in idxs if i not in selected_idxs]
        if len(idxs) == 0:
            continue

        random.shuffle(idxs)
        n_test = int(test_size * len(idxs))
        if n_test == 0:
            train_pos_idxs.update(idxs)
        else:
            dev_pos_idxs.update(idxs[:n_test])
            test_pos_idxs.update(idxs[n_test: 2 * n_test])
            train_pos_idxs.update(idxs[2 * n_test:])

        selected_idxs.update(idxs)

    assert len(train_pos_idxs.intersection(dev_pos_idxs)) == 0
    assert len(train_pos_idxs.intersection(test_pos_idxs)) == 0
    assert len(dev_pos_idxs.intersection(test_pos_idxs)) == 0

    train_samples.extend([
        samples[i] for i in train_pos_idxs
    ])
    if len(dev_pos_idxs) > 0:
        dev_samples.extend([
            samples[i] for i in dev_pos_idxs
        ])
    else:
        dev_samples.extend([
            samples[i] for i in train_pos_idxs
        ])
    test_samples.extend([
        samples[i] for i in test_pos_idxs
    ])

    if test:
        print('#train samples:', len(train_samples))
        print('#dev samples:', len(dev_samples))
        print('#test samples:', len(test_samples))

        identify(train_samples, prefix='train')
        identify(dev_samples, prefix='dev')
        identify(test_samples, prefix='test')

        return train_samples, dev_samples, test_samples
    else:
        train_samples = [
            *train_samples,
            *test_samples,
        ]
        print('#train samples:', len(train_samples))
        print('#dev samples:', len(dev_samples))

        identify(train_samples, prefix='train')
        identify(dev_samples, prefix='dev')
        identify(test_samples, prefix='test')

        return train_samples, dev_samples


def load_ner_src_tgt(
        src_path,
        tgt_path,
):

    texts = load_text(src_path)
    labels = load_text(tgt_path)
    assert len(texts) == len(labels)
    data = []
    for text, label in zip(texts, labels):
        tokens = text.split()
        tags = label.split()
        assert len(tokens) == len(tags)
        data.append({
            'tokens': tokens,
            'tags': tags,
        })
    return data


def load_ner_src_tgt_inline(fn):
    data = []
    with open(fn, mode='r', encoding='utf8') as f:
        for line in f:
            text, tag = line.split('\t')
            text = text.strip()
            tag = tag.strip()
            tokens = text.split()
            tags = tag.split()
            assert len(tokens) == len(tags)

            data.append({
                'tokens': tokens,
                'tags': tags,
            })
    return data


def load_syllable(path):
    syllables = []
    with open(path, mode='r', encoding='utf8') as f:
        for line in f:
            line = line.strip()
            if line == '':
                continue

            parts = line.split('\t', maxsplit=1)
            syllables.append(parts[0])
    return syllables


def get_coordinates(
        text: str,
):
    text = text.strip()
    lines = re.split(r'\n+', text)
    coordinates = []
    for line in lines:
        line = line.strip()
        if line == '':
            continue

        long, lat, _ = line.split(',')
        lat = float(lat)
        long = float(long)

        coordinates.append([lat, long])
    return coordinates


def load_polygon(
        kml_path,
):
    from lxml import etree
    with open(kml_path, mode='r',) as f:
        xml_data = etree.XML(f.read())
    # xml_data = etree.parse(kml_path)

    place_marks = xml_data.xpath('//Placemark')
    results = {}
    for place_mark in place_marks:
        name = place_mark.xpath('.//name/text()')[0]
        coordinates = get_coordinates(place_mark.xpath('.//coordinates/text()')[0])
        results[name] = coordinates
    return results