#!/usr/bin/env python3
"""
Find import files from the x3 import archive folder
and stick them together for a single reimport.

Useful when stock levels prevented multiple shipments from
importing in.
"""
import re
import pathlib
import pprint

THIS_DIRECTORY = pathlib.Path(__file__).parent
X3_IMPORT_ARCHIVE = THIS_DIRECTORY / "x3_imports" / "archive"
REIMPORT_DIRECTORY = THIS_DIRECTORY / "reimports"

LIST_OF_UNSHIPPED_ORDERS = [
'O0218424'
]

def get_positions(string):
    pos = []
    for i, chr in enumerate(string):
        if string[i] == '_':
            pos.append(i)
    return pos


def main():
    #run through all files in list and combine them into a single import
    with open(REIMPORT_DIRECTORY / 'ZSHIP867.dat', 'w',encoding="utf-8", newline="\n") as combined_import_file:
        files = get_files()
        for file in files:
            with file.open(
                    "r", encoding="utf-8", newline="\n"
                ) as individual_import_file:
                for line in individual_import_file:
                    combined_import_file.write(line)


#search the archive directory for the files, write their contents to a single file
def get_files():
    file_list = []
    for file in X3_IMPORT_ARCHIVE.iterdir():
        if file.name[:9] == 'ZSHIP867_':
            underscores = get_positions(file.name)
            pos1 = underscores[1]+1
            pos2 = underscores[2]
            if file.name[pos1:pos2] in LIST_OF_UNSHIPPED_ORDERS:
                file_list.append(file)
    return file_list


if __name__ == "__main__":
    main()