#!/usr/bin/env python
#
# Title:      PGBlitz (Reference Title File)
# Maintainer: Admin9705
# URL:        https://pgblitz.com - http://github.pgblitz.com
# GNU:        General Public License v3.0
#
# Original Author: clinton-hall
# https://github.com/clinton-hall/GetScripts/blob/master/SafeRename.py
#
# Modified By: desimaniac (No Acknowledgement of Source Above)
################################################################################
import os
import re
import shutil
import sys

# NZBGet Exit Codes
NZBGET_POSTPROCESS_PARCHECK = 92
NZBGET_POSTPROCESS_SUCCESS = 93
NZBGET_POSTPROCESS_ERROR = 94
NZBGET_POSTPROCESS_NONE = 95

############################################################
# EXTENSION STUFF
############################################################


def do_check():
    if not os.environ.has_key('NZBOP_SCRIPTDIR'):
        print "This script can only be called from NZBGet (11.0 or later)."
        sys.exit(0)

    if os.environ['NZBOP_VERSION'][0:5] < '11.0':
        print "[ERROR] NZBGet Version %s is not supported. Please update NZBGet." % (
            str(os.environ['NZBOP_VERSION']))
        sys.exit(0)

    print "Script triggered from NZBGet Version %s." % (
        str(os.environ['NZBOP_VERSION']))

    status = 0
    if 'NZBPP_TOTALSTATUS' in os.environ:
        if not os.environ['NZBPP_TOTALSTATUS'] == 'SUCCESS':
            print "[ERROR] Download failed with status %s." % (
                os.environ['NZBPP_STATUS'])
            status = 1
    else:
        # Check par status
        if os.environ['NZBPP_PARSTATUS'] == '1' or os.environ['NZBPP_PARSTATUS'] == '4':
            print "[ERROR] Par-repair failed, setting status \"failed\"."
            status = 1

        # Check unpack status
        if os.environ['NZBPP_UNPACKSTATUS'] == '1':
            print "[ERROR] Unpack failed, setting status \"failed\"."
            status = 1

        if os.environ['NZBPP_UNPACKSTATUS'] == '0' and os.environ['NZBPP_PARSTATUS'] == '0':
            # Unpack was skipped due to nzb-file properties or due to errors during par-check

            if os.environ['NZBPP_HEALTH'] < 1000:
                print "[ERROR] Download health is compromised and Par-check/repair disabled or no .par2 files found. " \
                      "Setting status \"failed\"."
                print "[ERROR] Please check your Par-check/repair settings for future downloads."
                status = 1

            else:
                print "[ERROR] Par-check/repair disabled or no .par2 files found, and Unpack not required. Health is " \
                      "ok so handle as though download successful."
                print "[WARNING] Please check your Par-check/repair settings for future downloads."

    # Check if destination directory exists (important for reprocessing of history items)
    if not os.path.isdir(os.environ['NZBPP_DIRECTORY']):
        print "[ERROR] Nothing to post-process: destination directory", os.environ[
            'NZBPP_DIRECTORY'], "doesn't exist. Setting status \"failed\"."
        status = 1

    # All checks done, now launching the script.
    if status == 1:
        sys.exit(NZBGET_POSTPROCESS_NONE)


def get_file_name(path):
    try:
        file_name = os.path.basename(path)
        extensions = re.findall(r'\.([^.]+)', file_name)
        ext = '.'.join(extensions)
        name = file_name.replace(".%s" % ext, '')
        return name, ext
    except Exception:
        pass
    return None


def is_file_hash(file_name):
    hash_regexp = [
        r'^[a-fA-F0-9]{40}$',
        r'^[a-fA-F0-9]{32}$',
        r'^[a-f0-9]{128}$',
        r'^[a-zA-Z0-9]{42}$'
    ]
    for hash in hash_regexp:
        if re.match(hash, file_name):
            return True
    return False


def find_files(folder, extension=None, depth=None):
    file_list = []
    start_count = folder.count(os.sep)
    for path, subdirs, files in os.walk(folder, topdown=True):
        for name in files:
            if depth and path.count(os.sep) - start_count >= depth:
                del subdirs[:]
                continue
            file = os.path.join(path, name)
            if not extension:
                file_list.append(file)
            else:
                if file.lower().endswith(extension.lower()):
                    file_list.append(file)

    return sorted(file_list, key=lambda x: x.count(os.path.sep), reverse=True)


############################################################
# MAIN
############################################################

# do checks
do_check()

# retrieve required variables
directory = os.path.normpath(os.environ['NZBPP_DIRECTORY'])
nzb_name = os.environ['NZBPP_NZBFILENAME']
if nzb_name is None:
    print("[ERROR] Unable to retrieve NZBPP_NZBFILENAME")
    sys.exit(NZBGET_POSTPROCESS_ERROR)
nzb_name = nzb_name.replace('.nzb', '')

print("[INFO] Using \"%s\" for hashed filenames" % nzb_name)
print("[INFO] Scanning \"%s\" for hashed filenames" % directory)

# scan for files
found_files = find_files(directory)
if not found_files:
    print("[INFO] No files were found in \"%s\"" % directory)
    sys.exit(NZBGET_POSTPROCESS_NONE)
else:
    print("[INFO] Found %d files to check for hashed filenames" %
          len(found_files))
    # loop files checking for file hash
    moved_files = 0
    for found_file_path in found_files:
        # set variable
        dir_name = os.path.dirname(found_file_path)
        file_name, file_ext = get_file_name(found_file_path)

        # is this a file hash
        if is_file_hash(file_name):
            new_file_path = os.path.join(
                dir_name, "%s.%s" % (nzb_name, file_ext))
            print("[INFO] Moving \"%s\" to \"%s\"" %
                  (found_file_path, new_file_path))
            try:
                shutil.move(found_file_path, new_file_path)
                moved_files += 1
            except Exception:
                print("[ERROR] Failed moving \"%s\" to \"%s\"" %
                      (found_file_path, new_file_path))

    print("[INFO] Finished processing \"%s\", moved %d files" %
          (directory, moved_files))

sys.exit(NZBGET_POSTPROCESS_SUCCESS)