# Path: diffoscope/config.py
# class Config(object):
#     max_diff_block_lines = 256
#     max_diff_block_lines_parent = 50
#     max_diff_block_lines_saved = float("inf")
#     # html-dir output uses ratio * max-diff-block-lines as its limit
#     max_diff_block_lines_html_dir_ratio = 4
#     # GNU diff cannot process arbitrary large files :(
#     max_diff_input_lines = 2 ** 20
#     max_report_size = 2000 * 2 ** 10 # 2000 kB
#     max_text_report_size = 0
#     max_report_child_size = 500 * 2 ** 10
#     new_file = False
#     fuzzy_threshold = 60
#     enforce_constraints = True
#     excludes = ()
# 
#     _singleton = {}
# 
#     def __init__(self):
#         self.__dict__ = self._singleton
# 
#     def __setattr__(self, k, v):
#         super(Config, self).__setattr__(k, v)
# 
#         if self.enforce_constraints:
#             self.check_constraints()
# 
#     def check_constraints(self):
#         if self.max_diff_block_lines < self.max_diff_block_lines_parent:  # noqa
#             raise ValueError("max_diff_block_lines ({0.max_diff_block_lines}) "
#                 "cannot be smaller than max_diff_block_lines_parent "
#                 "({0.max_diff_block_lines_parent})".format(self),
#             )
# 
#         max_ = self.max_diff_block_lines_html_dir_ratio * \
#             self.max_diff_block_lines
#         if self.max_diff_block_lines_saved < max_:  # noqa
#             raise ValueError("max_diff_block_lines_saved "
#                 "({0.max_diff_block_lines_saved}) cannot be smaller than "
#                 "{0.max_diff_block_lines_html_dir_ratio} * "
#                 "max_diff_block_lines ({1})".format(self, max_),
#             )


import logging
import operator
    import tlsh
from diffoscope.config import Config
# along with diffoscope.  If not, see <https://www.gnu.org/licenses/>.



try:
except ImportError:  # noqa
    tlsh = None

logger = logging.getLogger(__name__)


def perform_fuzzy_matching(members1, members2):
    if tlsh == None or Config().fuzzy_threshold == 0:
        return
    already_compared = set()
    # Perform local copies because they will be modified by consumer
    members1 = dict(members1)
    members2 = dict(members2)
    for name1, file1 in members1.items():
        if file1.is_directory() or not file1.fuzzy_hash:
            continue
        comparisons = []
        for name2, file2 in members2.items():
            if name2 in already_compared or file2.is_directory() or not file2.fuzzy_hash:
                continue
            comparisons.append((tlsh.diff(file1.fuzzy_hash, file2.fuzzy_hash), name2))
        if comparisons:
            comparisons.sort(key=operator.itemgetter(0))
            score, name2 = comparisons[0]
            logger.debug('fuzzy top match %s %s: %d difference score', name1, name2, score)

# Path: diffoscope/config.py
# class Config(object):
#     max_diff_block_lines = 256
#     max_diff_block_lines_parent = 50
#     max_diff_block_lines_saved = float("inf")
#     # html-dir output uses ratio * max-diff-block-lines as its limit
#     max_diff_block_lines_html_dir_ratio = 4
#     # GNU diff cannot process arbitrary large files :(
#     max_diff_input_lines = 2 ** 20
#     max_report_size = 2000 * 2 ** 10 # 2000 kB
#     max_text_report_size = 0
#     max_report_child_size = 500 * 2 ** 10
#     new_file = False
#     fuzzy_threshold = 60
#     enforce_constraints = True
#     excludes = ()
# 
#     _singleton = {}
# 
#     def __init__(self):
#         self.__dict__ = self._singleton
# 
#     def __setattr__(self, k, v):
#         super(Config, self).__setattr__(k, v)
# 
#         if self.enforce_constraints:
#             self.check_constraints()
# 
#     def check_constraints(self):
#         if self.max_diff_block_lines < self.max_diff_block_lines_parent:  # noqa
#             raise ValueError("max_diff_block_lines ({0.max_diff_block_lines}) "
#                 "cannot be smaller than max_diff_block_lines_parent "
#                 "({0.max_diff_block_lines_parent})".format(self),
#             )
# 
#         max_ = self.max_diff_block_lines_html_dir_ratio * \
#             self.max_diff_block_lines
#         if self.max_diff_block_lines_saved < max_:  # noqa
#             raise ValueError("max_diff_block_lines_saved "
#                 "({0.max_diff_block_lines_saved}) cannot be smaller than "
#                 "{0.max_diff_block_lines_html_dir_ratio} * "
#                 "max_diff_block_lines ({1})".format(self, max_),
#             )


# Path: diffoscope/comparators/utils/fuzzy.py
import logging
import operator
    import tlsh
from diffoscope.config import Config

# along with diffoscope.  If not, see <https://www.gnu.org/licenses/>.



try:
except ImportError:  # noqa
    tlsh = None

logger = logging.getLogger(__name__)


def perform_fuzzy_matching(members1, members2):
    if tlsh == None or Config().fuzzy_threshold == 0:
        return
    already_compared = set()
    # Perform local copies because they will be modified by consumer
    members1 = dict(members1)
    members2 = dict(members2)
    for name1, file1 in members1.items():
        if file1.is_directory() or not file1.fuzzy_hash:
            continue
        comparisons = []
        for name2, file2 in members2.items():
            if name2 in already_compared or file2.is_directory() or not file2.fuzzy_hash:
                continue
            comparisons.append((tlsh.diff(file1.fuzzy_hash, file2.fuzzy_hash), name2))
        if comparisons:
            comparisons.sort(key=operator.itemgetter(0))
            score, name2 = comparisons[0]
            logger.debug('fuzzy top match %s %s: %d difference score', name1, name2, score)

            if score < Config().fuzzy_threshold: