from __future__ import print_function
import argparse
from datetime import datetime, timedelta
import os
import pytsk3
import pyewf
import pymsiecf
import sys
import unicodecsv as csv
from utility.pytskutil import TSKUtil

"""
MIT License

Copyright (c) 2017 Chapin Bryce, Preston Miller

Please share comments and questions at:
    https://github.com/PythonForensics/PythonForensicsCookbook
    or email pyforcookbook@gmail.com

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
"""

__authors__ = ["Chapin Bryce", "Preston Miller"]
__date__ = 20170815
__description__ = "Script to parse index.dat files"


def main(evidence, image_type, path):
    # Create TSK object and query for Internet Explorer index.dat files
    tsk_util = TSKUtil(evidence, image_type)
    index_dir = tsk_util.query_directory(path)
    if index_dir is not None:
        index_files = tsk_util.recurse_files("index.dat", path=path,
                                             logic="equal")
        if index_files is not None:
            print("[+] Identified {} potential index.dat files".format(
                  len(index_files)))
            index_data = []
            for hit in index_files:
                index_file = hit[2]
                temp_index = write_file(index_file)
                if pymsiecf.check_file_signature(temp_index):
                    index_dat = pymsiecf.open(temp_index)
                    print("[+] Identified {} records in {}".format(
                        index_dat.number_of_items, temp_index))
                    for i, record in enumerate(index_dat.items):
                        try:
                            data = record.data
                            if data is not None:
                                data = data.rstrip("\x00")
                        except AttributeError:
                            if isinstance(record, pymsiecf.redirected):
                                index_data.append([
                                    i, temp_index, "", "", "", "", "",
                                    record.location, "", "", record.offset,
                                    os.path.join(path, hit[1].lstrip("//"))
                                ])

                            elif isinstance(record, pymsiecf.leak):
                                index_data.append([
                                    i, temp_index, record.filename, "",
                                    "", "", "", "", "", "", record.offset,
                                    os.path.join(path, hit[1].lstrip("//"))
                                ])

                            continue

                        index_data.append([
                            i, temp_index, record.filename,
                            record.type, record.primary_time,
                            record.secondary_time,
                            record.last_checked_time, record.location,
                            record.number_of_hits, data, record.offset,
                            os.path.join(path, hit[1].lstrip("//"))
                        ])

                else:
                    print("[-] {} not a valid index.dat file. Removing "
                          "temp file..".format(temp_index))
                    os.remove("index.dat")
                    continue

            os.remove("index.dat")
            write_output(index_data)
        else:
            print("[-] Index.dat files not found in {} directory".format(
                path))
            sys.exit(3)

    else:
        print("[-] Directory {} not found".format(win_event))
        sys.exit(2)


def write_file(index_file):
    with open(index_file.info.name.name, "w") as outfile:
        outfile.write(index_file.read_random(0, index_file.info.meta.size))
    return index_file.info.name.name


def write_output(data):
    output_name = "Internet_Indexdat_Summary_Report.csv"
    print("[+] Writing {} with {} parsed index.dat files to current "
          "working directory: {}".format(output_name, len(data),
                                         os.getcwd()))
    with open(output_name, "wb") as outfile:
        writer = csv.writer(outfile)
        writer.writerow(["Index", "File Name", "Record Name",
                         "Record Type", "Primary Date", "Secondary Date",
                         "Last Checked Date", "Location", "No. of Hits",
                         "Record Data", "Record Offset", "File Path"])
        writer.writerows(data)


if __name__ == "__main__":
    parser = argparse.ArgumentParser(
        description=__description__,
        epilog="Developed by {} on {}".format(
            ", ".join(__authors__), __date__)
    )
    parser.add_argument("EVIDENCE_FILE", help="Evidence file path")
    parser.add_argument("TYPE", help="Type of Evidence",
                        choices=("raw", "ewf"))
    parser.add_argument("-d", help="Index.dat directory to scan",
                        default="/USERS")
    args = parser.parse_args()

    if os.path.exists(args.EVIDENCE_FILE) and os.path.isfile(
            args.EVIDENCE_FILE):
        main(args.EVIDENCE_FILE, args.TYPE, args.d)
    else:
        print("[-] Supplied input file {} does not exist or is not a "
              "file".format(args.EVIDENCE_FILE))
        sys.exit(1)