#!/usr/bin/env python3

from fabric import task, Connection
from invoke.exceptions import UnexpectedExit
from io import StringIO
import requests
import argparse
import re
import sys
import datetime
import json
import socket


device_user = "root"
gitea_user = "vestasync"
device_short_sn = ""

cmd_parser = argparse.ArgumentParser(description='Process command line arguments.')
cmd_parser.add_argument('--cmd', help='Command (prepare, update, restore)', required=True)
cmd_args = cmd_parser.parse_known_args()

cmd_args = cmd_args[0]

main_parser = argparse.ArgumentParser(description='Process command line arguments.')
if cmd_args.cmd == "restore":
    main_parser.add_argument('--source_hostname', help='Source device hostname', required=True)
else:
    main_parser.add_argument('--device_new_name', help='Device new name', required=True)
main_parser.add_argument('--gitea_address', help='Gitea address string', required=True)
main_parser.add_argument('--gitea_token', help='Gitea token', required=True)
main_parser.add_argument('--device_ip', help='Device IP(s)', required=True, nargs='+', type=str)
main_parser.add_argument('--device_port', help='Device port', type=int)
main_parser.add_argument('--user_cmd', help='User commands file')
main_parser.add_argument('--reinstall_packages', help='Reinstall packages installed on source device')

args = main_parser.parse_known_args()
args = args[0]



def parse_address(address):
    pattern = r'^(?P<protocol>http|https)://(?P<host>[^:]+):(?P<port>\d+)(/.*|)$'
    match = re.match(pattern, address)
    if match:
        return match.group('protocol'), match.group('host'), match.group('port')
    else:
        raise ValueError("Invalid address format")


def get_short_sn(c):
    global device_short_sn
    device_short_sn = c.run('wb-gen-serial -s', hide=True).stdout.strip()
    if device_short_sn is None:
        raise ValueError("Both device_new_name and device_short_sn must be provided")

def set_hostname(c):
    c.run(f'hostnamectl set-hostname {args.device_new_name}-{device_short_sn}')
    hostname = c.run('hostname', hide=True).stdout.strip()
    return hostname

def save_hostname(c):
    c.run(f'echo $(hostname) > /mnt/data/etc/vestasync/hostname')
    hostname = c.run('hostname', hide=True).stdout.strip()
    return hostname

def restore_hostname(c):
    c.run(f'hostnamectl set-hostname $(cat /mnt/data/etc/vestasync/hostname)')


def prepare_packages_wb(c):
    c.run('apt-get update')
    c.run('apt-get install git apt-transport-https ca-certificates htop sudo mc wget curl jq zip gzip tar  -y')
    c.run('apt-get -y autoremove')
    c.run('apt-get -y clean')
    c.run('apt-get -y autoclean ')


def configure_git(c):
    c.run(f'git config --global user.name vestasync_wb_$(hostname)_manual')
    c.run(f'git config --global user.email "vestasync@fake.mail"')
    c.run(f'git config --global init.defaultBranch "master"')

def create_repo(c):
    hostname = c.run('hostname', hide=True).stdout.strip()
    headers = {'Authorization': f'token {args.gitea_token}', 'Content-Type': 'application/json'}
    data = {"name": hostname, "private": False}
    response = requests.post(f'{args.vestasync_gitea_protocol}://{args.vestasync_gitea_host}:{args.vestasync_gitea_port}/api/v1/user/repos', headers=headers, json=data)
    if response.status_code == 201:  # 201 - Created, ожидаемый код успешного создания репозитория
        print("[VestaSync] Repository created successfully.")
    elif response.status_code == 409:  # 409 - Conflict, репозиторий уже существует
        print("[VestaSync] Error: Repository already exists.")
        print("[VestaSync] Exiting...")
        sys.exit(1)
    else:
        print(f"[VestaSync] Create repo error: Unexpected HTTP status code {response.status_code}")
        print("[VestaSync] Exiting...")
        sys.exit(1)


def init_repo(c):
    hostname = c.run('hostname', hide=True).stdout.strip()
    c.run('cd /mnt/data/etc/ && git init')
    c.run('echo "wb-mqtt-mbgate.conf" > /mnt/data/etc/.gitignore')
    c.run('echo "wb-mqtt-opcua.conf" >> /mnt/data/etc/.gitignore')
    c.run(f'cd /mnt/data/etc/ && git remote add origin {args.vestasync_gitea_protocol}://{gitea_user}:{args.gitea_token}@{args.vestasync_gitea_host}:{args.vestasync_gitea_port}/{gitea_user}/{hostname}.git')


def copy_wb_rule(c):
    c.put("./files/vestasync.js", "/mnt/data/etc/wb-rules/vestasync.js")

def create_automac_systemd(c):
    #disable
    for service in ['apply_macs.service']:
        c.run(f'systemctl stop {service}', hide=True, warn=True)
        c.run(f'systemctl disable {service}', hide=True, warn=True)

    file_paths = { #local path: remote path
        './files/apply_macs.sh':            '/usr/local/bin/apply_macs.sh',
        './files/apply_macs.service':       '/etc/systemd/system/apply_macs.service',
    }

    for local_path, remote_path in file_paths.items():
        c.put(local_path, remote_path)
        c.run(f"chmod +x {remote_path}")

    #reload
    c.run("systemctl daemon-reload")

    #enable and start
    for service in ['apply_macs.service']:
        c.run(f'systemctl enable {service}', hide=True, warn=True)
        #c.run(f'systemctl start {service}')


    #check statuses
    for service in ['apply_macs.service']:
        active = c.run(f'systemctl is-active {service}', hide=True, warn=True).stdout.strip()
        enabled = c.run(f'systemctl is-enabled {service}', hide=True, warn=True).stdout.strip()
        print(f"[VestaSync] Service {service}: {active}, {enabled}")




def create_autogit_systemd(c):
    #disable and remove
    print("[VestaSync] Autogit: stop and disable services")
    for service in ['pushgit.timer',
                    'pushgit_inotify_special.service',
                    'pushgit_inotify.service',
                    'pushgit_run_on_start.timer' ]:
        c.run(f'systemctl stop {service}', hide=True, warn=True)
        c.run(f'systemctl disable {service}', hide=True, warn=True)

    print("[VestaSync] Autogit: Remove old files")
    c.run(f'rm /etc/systemd/system/pushgit*', hide=True, warn=True)
    c.run(f'rm /usr/local/bin/pushgit*', hide=True, warn=True)


    print("[VestaSync] Autogit: copy new files, chmod +x")
    file_paths = { #local path: remote path
    './files/pushgit/pushgit.sh':                       '/usr/local/bin/pushgit.sh',
    './files/pushgit/pushgit_inotify.sh':               '/usr/local/bin/pushgit_inotify.sh',
    './files/pushgit/pushgit_inotify.service':          '/etc/systemd/system/pushgit_inotify.service',
    './files/pushgit/pushgit_run_on_start.timer':       '/etc/systemd/system/pushgit_run_on_start.timer',
    './files/pushgit/pushgit_inotify_special.service':  '/etc/systemd/system/pushgit_inotify_special.service',
    }

    for local_path, remote_path in file_paths.items():
        c.put(local_path, remote_path)
        c.run(f"chmod +x {remote_path}")

    print("[VestaSync] Autogit: reload configs")
    c.run("systemctl daemon-reload", hide=True, warn=True)

    #enable and start
    print("[VestaSync] Autogit: enable run on start")
    for service in ['pushgit_run_on_start.timer']:
        c.run(f'systemctl enable {service}', hide=True, warn=True)

    print("[VestaSync] Autogit: start inotify")
    for service in ['pushgit_inotify_special.service']:
        c.run(f'systemctl start {service}', hide=True, warn=True)


    #check statuses
    for service in ['pushgit_run_on_start.timer', 'pushgit_inotify.service', 'pushgit_inotify_special.service']:
        active = c.run(f'systemctl is-active {service}  || true', hide=True).stdout.strip()
        enabled = c.run(f'systemctl is-enabled {service}  || true', hide=True).stdout.strip()
        print(f"[VestaSync] Service {service}: {active}, {enabled}")

def mark_original_restored(c, mark):
    if mark == "original":
        c.run("rm /mnt/data/etc/vestasync/restored", warn=True, hide=True)
        c.run("touch /mnt/data/etc/vestasync/original", warn=True, hide=True)
    if mark == "restored":
        c.run("touch /mnt/data/etc/vestasync/restored", warn=True, hide=True)
        c.run("rm /mnt/data/etc/vestasync/original", warn=True, hide=True)

def reboot(c):
    c.run("reboot > /dev/null 2>&1", warn=True)

def git_remove_remote(c):
    hostname = c.run('hostname', hide=True).stdout.strip()
    c.run(f'cd /mnt/data/etc/ && git remote | xargs -L1 git remote remove', warn=True, hide=True)


def git_clone(c):
    c.run(f'rm -rf /mnt/data/{args.source_hostname}_etc ', warn=True)
    c.run(f'mkdir -p /mnt/data/{args.source_hostname}_etc ', hide=True)
    c.run(f'git clone {args.vestasync_gitea_protocol}://{gitea_user}:{args.gitea_token}@{args.vestasync_gitea_host}:{args.vestasync_gitea_port}/{gitea_user}/{args.source_hostname}.git /mnt/data/{args.source_hostname}_etc')

def copy_etc(c):
    current_date = datetime.datetime.now().strftime("%Y-%m-%d-%H-%M-%S")

    archive_name = f"backup_of_vestasync_restore_{current_date}.tar.gz"
    print(f"[VestaSync] Remove old .git...")
    c.run(f"rm -rf /mnt/data/etc/.git", warn=True, hide=True)
    print(f"[VestaSync] Create backup: /mnt/data/{archive_name}")
    c.run(f"tar -czvf /mnt/data/{archive_name} -C /mnt/data etc", hide=True)

    files_and_folders = c.run(f"find /mnt/data/{args.source_hostname}_etc", hide=True).stdout.strip().split('\n')
    files_and_folders = [item for item in files_and_folders if ".git" not in item]

    for item in files_and_folders:
        dest_item = item.replace(f"/{args.source_hostname}_etc/", "/etc/")
        if c.run(f"test -f {item}", hide=True, warn=True).ok:
            c.run(f"cat {item} > {dest_item}")
        elif c.run(f"test -d {item}", hide=True, warn=True).ok:
            c.run(f"mkdir -p {dest_item}")
        print(f"Restore: {item} -> {dest_item}")

    print(f"[VestaSync] Copy source .git...")
    c.run(f"cp -R /mnt/data/{args.source_hostname}_etc/.git /mnt/data/etc/.git")

    print(f"[VestaSync] Remove source etc...")
    c.run(f"rm -rf /mnt/data/{args.source_hostname}_etc")

    print(f"[VestaSync] Restore completed")

def ppush_the_repo(c):
    c.run('cd /mnt/data/etc/ && git add .', hide=True)
    try:
        c.run('GIT_AUTHOR_NAME="vestasync_wb_$(hostname)_update" GIT_COMMITTER_NAME=$GIT_AUTHOR_NAME cd /mnt/data/etc/ && git commit -m "$(date)"', hide=True)
    except UnexpectedExit as e:
        if 'nothing to commit' in e.result.stdout:
            print("Nothing to commit, exit")
        else:
            print(f"Error: {e.result.stderr}")
    c.run('cd /mnt/data/etc/ && git push --force --set-upstream -u origin master', hide=True)

def run_user_cmd(c, file):
    user_cmd_file = "/tmp/user_cmd.sh"
    c.put(file, user_cmd_file)
    c.run(f"bash {user_cmd_file}")
    c.run(f"rm {user_cmd_file}")

def save_mac_in_cfg(c):
    hostname = c.run('hostname', hide=True).stdout.strip()
    interfaces_info = c.run("ip -j a", hide=True).stdout.strip()
    interfaces_data = json.loads(interfaces_info)
    c.run("mkdir -p /mnt/data/etc/vestasync/macs")
    for interface in interfaces_data:
        ifname = interface["ifname"]
        if re.match(r'^(eth|wlan)', ifname):
            mac_address = interface["address"]
            c.run(f"echo {mac_address} > /mnt/data/etc/vestasync/macs/{ifname}")


def save_packages(c):
    c.run("apt-mark showmanual > /mnt/data/etc/vestasync/packages")

def install_packages(c):
    c.run("xargs -a user_installed_packages.txt apt-get install -y", warn=True)

def check_vestasync_installed(c):
    vestasync_path = "/mnt/data/etc/vestasync"
    result = c.run(f"test -d {vestasync_path}", warn=True)
    return result.ok

def device_update(c):
    print("[VestaSync] Found vestasync! Update...")
    c.run(f'systemctl disable pushgit_inotify.service', warn=True)
    print("[VestaSync] Install new wb rule, automac/autogit...")
    copy_wb_rule(c)
    create_automac_systemd(c)
    create_autogit_systemd(c)
    print("[VestaSync] Pushing updated cfg's...")
    ppush_the_repo(c)
    print("[VestaSync] Update vestasync complete\n")

def device_install(c):
    print("[VestaSync] Not found vestasync! Install...")
    print("[VestaSync] Update and install packages...")
    prepare_packages_wb(c)

    print("[VestaSync] Configuring git...")
    configure_git(c)

    print("[VestaSync] Setting hostname...")
    get_short_sn(c)
    set_hostname(c)

    if args.user_cmd is not None:
        print("[VestaSync] Run users cmd's...")
        run_user_cmd(c, args.user_cmd)

    print("[VestaSync] Initializing local repo and add remote...")
    init_repo(c)

    print("[VestaSync] Creating repo on gitea...")
    create_repo(c)

    print("[VestaSync] Pushing raw cfg's...")
    ppush_the_repo(c)

    print("[VestaSync] Saving mac, packages and hostname in cfg...")
    save_mac_in_cfg(c)
    save_packages(c)
    hostname = save_hostname(c)

    print("[VestaSync] Install wb rule, automac/autogit...")
    copy_wb_rule(c)
    create_automac_systemd(c)
    create_autogit_systemd(c)

    print("[VestaSync] Pushing updated cfg's...")
    ppush_the_repo(c)

    print("[VestaSync] Marking controller as original...")
    mark_original_restored(c, "original")

    print("[VestaSync] Rebooting...")
    reboot(c)

    print(f"[VestaSync] Install vestasync complete (hostname {hostname}), rebooting target device..\n")


def device_install_or_update():
    print(f"[VestaSync] Install/update command on host(s) {', '.join(args.device_ip)}")
    for device_ip in args.device_ip:
        with Connection(host=device_ip, port=args.device_port, user=device_user, connect_kwargs={"password": "wirenboard"}) as c:
            print(f"\n[VestaSync] Connect to {device_ip} as {device_user}..")
            try:
                if not check_vestasync_installed(c):
                    device_install(c)
                else:
                    device_update(c)
            except socket.timeout:
                print(f"Failed to connect to the host {device_ip}")


def device_restore():
    for device_ip in args.device_ip:
        with Connection(host=device_ip, user=device_user, connect_kwargs={"password": "wirenboard"}) as c:
            print(f"\n[VestaSync] Connect to {device_ip} as {device_user}..")
            try:
                if not check_vestasync_installed(c):
                    print("[VestaSync] Not found vestasync! Install...")
                    prepare_packages_wb(c)
                    configure_git(c)
                print(f"[VestaSync] Restore to {device_ip} backup from {args.source_hostname}")
                git_clone(c)
                copy_etc(c)
                restore_hostname(c)
                if args.reinstall_packages is not None:
                    install_packages(c)
                #ppush_the_repo(c) #TODO: не работает!
                create_autogit_systemd(c)
                create_automac_systemd(c)
                mark_original_restored(c, "restored")
                if args.user_cmd is not None:
                    run_user_cmd(c, args.user_cmd)
                #ppush_the_repo(c)
                reboot(c)
                print(f"[VestaSync] Restore backup complete (hostname {args.source_hostname}), rebooting target device..\n")
            except socket.timeout:
                print(f"[VestaSync] Failed to connect to the host {device_ip}")






if __name__ == '__main__':
    try:
        args.vestasync_gitea_protocol, args.vestasync_gitea_host, args.vestasync_gitea_port = parse_address(args.gitea_address)
        del args.gitea_address
    except ValueError as e:
        print(e)
        exit(1)

    if cmd_args.cmd == "install":
        device_install_or_update()
    if cmd_args.cmd == "restore":
        device_restore()