#!/usr/bin/env python3
"""
Create a 997 and load it into the proper outgoing folder

A 997 is a functional acknowledgment, we received the EDI tranmission contorl number and reply back with it
"""
import dataclasses
import datetime
import io
import pathlib
import typing
import pprint

import records  # type: ignore
import yamamotoyama  # type: ignore


THIS_DIRECTORY = pathlib.Path(__file__).parent
X12_DIRECTORY = THIS_DIRECTORY / "edi-testing" #TODO change back to "outgoing"
ACK_DIRECTORY = THIS_DIRECTORY / "997_processing"

TEST_FILE = THIS_DIRECTORY / "edi-testing" / "944_YAMAMOTOYAMA_765aaebb-06c4-4eea-8d2a-7dddf2fd9ec2.edi"#TODO remove this

AK1_MAPPING = {
"944" : "RE",
"945" : "SW",
}

def main():
    """
    Do it!
    """
    #write_997(TEST_FILE)
    #TODO loop through 997 directory and send for each file inside
    for edi_filename in ACK_DIRECTORY.iterdir(): #TODO uncomment and review
        process_file(edi_filename)
        # file moved to 997 processing folder to be sent later
        shutil.move(edi_filename, X12_DIRECTORY / "outgoing" / "archive" / edi_filename.name)


def write_997(edi_filename: pathlib.Path):
    """
    Write out a 997 to a file
    """
    group_control_number = ''
    transaction_set_control_number = ''
    company = ''
    edi_type = ''
    with open(edi_filename, 'r') as edi_file:
        for line in edi_file:
            line = line.split("~")
            for field in line:
                fields = field.split("*")
                if fields[0] == 'ISA':
                    group_control_number = fields[13]
                    company_longname = fields[6]
                elif fields[0] == 'GS':
                    company = fields[2]
                    transaction_set_control_number = fields[6]
                elif fields[0] == 'ST':
                    edi_type = fields[1]
    now = datetime.datetime.now()
    datestamp_string = now.strftime("%Y-%m-%d-%H-%M-%S")
    with (X12_DIRECTORY / f"{company}-{transaction_set_control_number}-{datestamp_string}-997.edi").open(
        "w", encoding="utf-8", newline="\n"
    ) as x12_file:
        raw_control_number = control_number()
        output = x12_file.write
        header = write_997_header(raw_control_number,company_longname,company,edi_type,group_control_number)
        lines = write_997_lines(edi_type,transaction_set_control_number)
        footer = write_997_footer(raw_control_number,group_control_number)
        output(header)
        output(lines)
        output(footer)


def write_997_header(raw_control_number,company_longname,company,edi_type,group_control_number):
    now = datetime.datetime.now()
    date = now.strftime("%y%m%d")
    longdate = now.strftime("%Y%m%d")
    time = now.strftime("%H%M")
    short_control_number = f"{raw_control_number:04}"
    interchange_control_number = (
        f"{raw_control_number:09}"  # Format to 9 characters
    )
    AK1 = AK1_MAPPING[edi_type]
    
    header_string = ''.join([
        f"ISA*00*          *00*          *ZZ*YAMAMOTOYAMA   *ZZ*{company_longname}*",
        date,
        "*",
        time,
        "*U*00401*",
        interchange_control_number,
        "*0*P*>~",
        "GS*",
        "FA*",
        "YAMAMOTOYAMA*",
        company+"*",
        longdate+"*",
        time+"*",
        short_control_number+"*",
        "X*",
        "004010~",
        "ST*",
        "997*0001~",
        "AK1*",
        AK1+"*",
        group_control_number+"~",
    ]
    )
    return header_string


def write_997_lines(edi_type,transaction_set_control_number):
    #short_control_number = f"{group_control_number:04}"
    detail_string = ''.join([
    "AK2*",
    edi_type+"*",
    transaction_set_control_number+"~"
    "AK5*",
    "A~",
    "AK9*A*1*1*1~",
    ])
    return detail_string

def write_997_footer(raw_control_number,group_control_number):
    interchange_control_number = (
        f"{raw_control_number:09}"  # Format to 9 characters
    )
    short_control_number = f"{raw_control_number:04}"
    footer_string = ''.join([
    "SE*6*0001~",
    "GE*1*",
    str(short_control_number)+"~",
    "IEA*1*",
    str(interchange_control_number)
    ])
    return footer_string


def control_number() -> int:
    """
    Next EDI serial number
    """
    filepath = pathlib.Path(__file__).with_suffix(".remember")
    encoding = "utf-8"
    newline = "\n"
    try:
        with filepath.open(
            "r", encoding=encoding, newline=newline
        ) as remember_file:
            number = int(remember_file.readline().rstrip("\n"))
    except (OSError, ValueError):
        number = 0
    number += 1
    with filepath.open("w", encoding=encoding, newline=newline) as remember_file:
        remember_file.write(f"{number}\n")
    return number


if __name__ == "__main__":
    main()