#!/usr/bin/env python3
"""
Pull shipment files from the Stash AWS FTP.
load shipping data into analytics database
"""
import csv
import pprint
import dataclasses
import datetime
import decimal
import functools
import pathlib
import re
import shutil
import typing
import paramiko

import records  # type: ignore

import yamamotoyama  # type: ignore
import yamamotoyama.x3_imports  # type: ignore

THIS_DIRECTORY = pathlib.Path(__file__).parent

SFTP_HOST = "s-8ade4d252cc44c50b.server.transfer.us-west-1.amazonaws.com"
SFTP_USERNAME = "yumiddleware2023"
SSH_DIRECTORY = THIS_DIRECTORY / "ssh" #TODO fixme
SSH_KNOWN_HOSTS_FILE = str(SSH_DIRECTORY / "known_hosts")
SSH_KEY_FILENAME = str(SSH_DIRECTORY / "id_ed25519")

INCOMING_DIRECTORY = THIS_DIRECTORY / "new_files_from_ftp"
ORDER_DIRECTORY = THIS_DIRECTORY / "incoming_orders"
ARCHIVE_DIRECTORY = THIS_DIRECTORY / "incoming_shipments" / "archive"


def main():
    retrieve_x12_edi_files()#TODO uncomment
    for file in INCOMING_DIRECTORY.iterdir():
        if file.name[-4:] != '.csv':
            continue
        else:
            clean_lines(file)
            shutil.move(file, ARCHIVE_DIRECTORY / file.name)
    for file in INCOMING_DIRECTORY.iterdir():
        if file.name[-4:] != '.csv':
            continue
        else:
            process_files(file)
            shutil.move(file, ARCHIVE_DIRECTORY / file.name)


def sftp_server() -> paramiko.SFTPClient:
    with paramiko.SSHClient() as ssh_client:
        ssh_client.load_system_host_keys()
        ssh_client.load_host_keys(SSH_KNOWN_HOSTS_FILE)
        ssh_client.set_missing_host_key_policy(paramiko.client.RejectPolicy)
        ssh_client.connect(
            hostname=SFTP_HOST, username=SFTP_USERNAME, key_filename=SSH_KEY_FILENAME
        )
        with ssh_client.open_sftp() as sftp_connection:
            yield sftp_connection

def retrieve_x12_edi_files():
    """
    Connect to S3 bucket & pull down files.
    """
    with paramiko.SSHClient() as ssh_client:
        ssh_client.load_system_host_keys()
        ssh_client.load_host_keys(SSH_KNOWN_HOSTS_FILE)
        ssh_client.set_missing_host_key_policy(paramiko.client.RejectPolicy)
        ssh_client.connect(
            hostname=SFTP_HOST, username=SFTP_USERNAME, key_filename=SSH_KEY_FILENAME
        )
        with ssh_client.open_sftp() as sftp_connection:
            sftp_connection.chdir("/yu-edi-transfer/source-logi/prod/ecomm-inbound")
            for filename in sftp_connection.listdir():
                #if edi_945.SOURCE_945_FILENAME_RE.match(filename):#TODO fixme
                sftp_connection.get(filename, INCOMING_DIRECTORY / filename)
                new_filename = f"/yu-edi-transfer/source-logi/prod/ecomm-processed/{filename}"
                sftp_connection.rename(filename, new_filename)


def clean_lines(file):
    """
    Fix lines that have newlines in their descriptions
    """
    with open(file, 'r', encoding='utf8') as source_file:
        with open(INCOMING_DIRECTORY / f'clean_{file.name}', 'w',newline='',encoding='utf8') as output:
            csv_reader = csv.reader(source_file)
            csv_writer = csv.writer(output)
            headers = next(csv_reader)
            data = list(csv_reader)
            for i, row in enumerate(data):
                if len(row) < len(headers):
                    next_line = data.pop(i+1)
                    csv_writer.writerow(row+next_line)
                else:
                    csv_writer.writerow(row)


def process_files(file):
    with open(file, encoding='utf8') as source_file:
        with yamamotoyama.get_connection() as db_connection:
            with db_connection.transaction() as _:
                with open(ORDER_DIRECTORY / f'sorted_{file.name}', 'w',newline='',encoding='utf8') as output:
                    csv_reader = csv.reader(source_file)
                    csv_writer = csv.writer(output)
                    csv_writer.writerow(next(csv_reader, None)) #skip header
                    csv_sort = sorted(csv_reader, key=lambda row: row[6], reverse=False)
                    for row in csv_sort:
                        csv_writer.writerow(row)
                        site = row[0]
                        item = row[1]
                        des = row[2]
                        qty = row[3]
                        lot = row[4]
                        order_id = row[6]
                        tracking = row[16]
                        ship_date = datetime.datetime.strptime(row[17],'%m/%d/%Y %I:%M:%S %p').strftime('%m/%d/%Y')# what comes from SL
                        #ship_date = datetime.datetime.strptime(row[17],'%m/%d/%Y %H:%M').strftime('%m/%d/%Y')#default when we sort in Excel
                        
                        db_connection.query(
                            """
                            INSERT INTO [analytics].[dbo].[SL_ECOMM]
                                ([site],[item],[des],[qty],[lot],[order_id],[ship_date],[tracking])
                            VALUES
                                (:site,:item,:des,:qty,:lot,:order_id,:ship_date,:tracking)
                            """,
                            site=site,
                            item=item,
                            des=des,
                            qty=qty,
                            lot=lot,
                            order_id=order_id,
                            ship_date=ship_date,
                            tracking=tracking
                        )

if __name__ == "__main__":
    main()