#!/usr/bin/python3
import traceback
import os, re, struct, sys, json, pty, shlex
import urllib.request, urllib.parse, ssl, signal
from glob import glob
from select import epoll, EPOLLIN, EPOLLHUP
from socket import socket, inet_ntoa, AF_INET, AF_INET6, AF_PACKET
from collections import OrderedDict as oDict
from subprocess import Popen, STDOUT, PIPE
from time import sleep, time
from random import choice
from string import ascii_uppercase, ascii_lowercase, digits

## == Profiles Path can be set via --profiles-path=/path
##    This just sets the default path if the parameter is omitted.
profiles_path = 'https://raw.githubusercontent.com/Torxed/archinstall/master/deployments'

try:
	import psutil
except:
	## Time to monkey patch in all the stats and psutil fuctions if it isn't installed.

	class mem():
		def __init__(self, free, percent=-1):
			self.free = free
			self.percent = percent

	class disk():
		def __init__(self, size, free, percent):
			self.size = size
			self.free = free
			self.percent = percent

	class iostat():
		def __init__(self, interface, bytes_sent=0, bytes_recv=0):
			self.interface = interface
			self.bytes_recv = int(bytes_recv)
			self.bytes_sent = int(bytes_sent)
		def __repr__(self, *args, **kwargs):
			return f'iostat@{self.interface}[bytes_sent: {self.bytes_sent}, bytes_recv: {self.bytes_recv}]'

	class psutil():
		def cpu_percent(interval=0):
			## This just counts the ammount of time the CPU has spent. Find a better way!
			with cmd("grep 'cpu ' /proc/stat | awk '{usage=($2+$4)*100/($2+$4+$5)} END {print usage}'") as output:
				for line in output:
					return float(line.strip().decode('UTF-8'))
		
		def virtual_memory():
			with cmd("grep 'MemFree: ' /proc/meminfo | awk '{free=($2)} END {print free}'") as output:
				for line in output:
					return mem(float(line.strip().decode('UTF-8')))

		def disk_usage(partition):
			disk_stats = os.statvfs(partition)
			free_size = disk_stats.f_bfree * disk_stats.f_bsize
			disk_size = disk_stats.f_blocks * disk_stats.f_bsize
			percent = (100/disk_size)*free_size
			return disk(disk_size, free_size, percent)

		def net_if_addrs():
			interfaces = {}
			for root, folders, files in os.walk('/sys/class/net/'):
				for name in folders:
					interfaces[name] = {}
			return interfaces

		def net_io_counters(pernic=True):
			data = {}
			for interface in psutil.net_if_addrs().keys():
				with cmd("grep '{interface}:' /proc/net/dev | awk '{{recv=$2}}{{send=$10}} END {{print send,recv}}'".format(interface=interface)) as output:
					for line in output:
						data[interface] = iostat(interface, *line.strip().decode('UTF-8').split(' ',1))
			return data

## FIXME: dependency checks (fdisk, lsblk etc)
def sig_handler(signal, frame):
	print('\nAborting further installation steps!')
	print(' Here\'s a summary of the commandline:')
	print(f' {sys.argv}')

	exit(0)
signal.signal(signal.SIGINT, sig_handler)


rootdir_pattern = re.compile('^.*?/devices')
harddrives = oDict()

args = {}
positionals = []
for arg in sys.argv[1:]:
	if '--' == arg[:2]:
		if '=' in arg:
			key, val = [x.strip() for x in arg[2:].split('=')]
		else:
			key, val = arg[2:], True
		args[key] = val
	else:
		positionals.append(arg)

def get_default_gateway_linux():
	"""Read the default gateway directly from /proc."""
	with open("/proc/net/route") as fh:
		for line in fh:
			fields = line.strip().split()
			if fields[1] != '00000000' or not int(fields[3], 16) & 2:
				continue

			return inet_ntoa(struct.pack("<L", int(fields[2], 16)))

def get_local_MACs():
	macs = {}
	for nic, opts in psutil.net_if_addrs().items():
		for addr in opts:
			#if addr.family in (AF_INET, AF_INET6) and addr.address:
			if addr.family == AF_PACKET: # MAC
				macs[addr.address] = nic
	return macs

def gen_yubikey_password():
	return None #TODO: Implement

def pid_exists(pid):
	"""Check whether pid exists in the current process table."""
	if pid < 0:
		return False
	try:
		os.kill(pid, 0)
	except (OSError, e):
		return e.errno == errno.EPERMRM
	else:
		return True

class sys_command():
	def __init__(self, cmd, opts={}):
		self.cmd = shlex.split(cmd)
		self.opts = opts
		self.pid = -1
	
	def __enter__(self, *args, **kwargs):
		## Prep for context management (still block calls)
		return self.exec()

	def __leave__(self, *args, **kwargs):
		if 'debug' in self.opts and self.opts['debug']:
			print('[N] Leaving subsystem routine.')
		os.waitpid(self.pid, 0)
		if 'debug' in self.opts and self.opts['debug']:
			print('[N] (Bye bye!)')

	def exec(self):
		if not self.cmd[0][0] == '/':
			print('[N] Command is not executed with absolute path, trying to find: {}'.format(self.cmd[0]))
			o = b''.join(sys_command('/usr/bin/which {}'.format(self.cmd[0])).exec())
			self.cmd[0] = o.decode('UTF-8')
			print('[N] This is what I\'m going with: {}'.format(self.cmd[0]))
		# PID = 0 for child, and the PID of the child for the parent    
		self.pid, child_fd = pty.fork()

		if not self.pid: # Child process
			# Replace child process with our main process
			os.execv(self.cmd[0], self.cmd)

		poller = epoll()
		poller.register(child_fd, EPOLLIN | EPOLLHUP)

		alive = True
		trace_log = b''
		last_trigger_pos = 0
		while alive:
			for fileno, event in poller.poll(0.1):
				try:
					output = os.read(child_fd, 8192).strip()
					trace_log += output
				except OSError:
					alive = False
					break

				if 'debug' in self.opts and self.opts['debug']:
					if len(output):
						print(output)

				lower = output.lower()
				broke = False
				if 'triggers' in self.opts:
					for trigger in list(self.opts['triggers']):
						if trigger.lower() in trace_log[last_trigger_pos:].lower():
							trigger_pos_in_log = trace_log[last_trigger_pos:].lower().find(trigger.lower()) + len(trigger)

							if 'debug' in self.opts and self.opts['debug']:
								print('[N] Writing to subsystem: {}'.format(self.opts['triggers'][trigger].decode('UTF-8')))

							last_trigger_pos = trigger_pos_in_log #len(trace_log)
							os.write(child_fd, self.opts['triggers'][trigger])
							del(self.opts['triggers'][trigger])
							broke = True
							break

					if broke:
						continue

					## Adding a exit trigger:
					if len(self.opts['triggers']) == 0:
						if 'debug' in self.opts and self.opts['debug']:
							print('[N] Waiting for last command to finish...')
						if bytes(f'[root@{args["hostname"]} ~]#'.lower(), 'UTF-8') in trace_log[0-len(f'[root@{args["hostname"]} ~]#')-5:].lower():
							if 'debug' in self.opts and self.opts['debug']:
								print('[N] Last command finished, exiting subsystem.')
							alive = False
							break
				yield output

		# Gracefully wait for the last output to be given to us from the above command.
		# Or break on OSError (process has died)
		last = time()
		while time()-last < 5:
			for fileno, event in poller.poll(0.1):
				try:
					output = os.read(child_fd, 8192).strip()
					trace_log += output
				except OSError:
					last = time() - 60
					break

				if 'debug' in self.opts and self.opts['debug']:
					if len(output):
						print(output)

				last = time()

		if 'debug' in self.opts and self.opts['debug']:
			print('[N] Exited subsystem, instructing it to shutdown.')
		# Since we're in a subsystem, we gotta bail out!
		# Bail bail bail!
		os.write(child_fd, b'shutdown now\n')

		# We need to flush the output of shutdown now, otherwise the 
		# Popen() handle will hang and we'll never exit out of os.waitpid() later on.
		alive = True
		while alive:
			for fileno, event in poller.poll(0.1):
				try:
					output = os.read(child_fd, 8192).strip()
					trace_log += output
				except OSError:
					alive = False
					break

				if 'debug' in self.opts and self.opts['debug']:
					if len(output):
						print(output)

				if b'Container temporary has been shutdown.' in trace_log[0-len('Container temporary has been shutdown.')-5:]:
					alive = False
					break

		if 'debug' in self.opts and self.opts['debug']:
			print('[N] Waiting for exit code.')
		exit_code = os.waitpid(self.pid, 0)[1]

		if exit_code != 0:
			print('[E] Command "{}" on line ~150 exited with status code:'.format(self.cmd[0]), exit_code)
			print(trace_log)
			print('[?] Command executed: {}'.format(self.cmd))
			exit(1)

		if 'debug' in self.opts and self.opts['debug']:
			print('[N] Subsystem routine complete.')

def simple_command(cmd, opts=None, *args, **kwargs):
	if not opts: opts = {}
	if 'debug' in opts:
		print('[!] {}'.format(cmd))
	handle = Popen(cmd, shell='True', stdout=PIPE, stderr=STDOUT, stdin=PIPE, **kwargs)
	output = b''
	while handle.poll() is None:
		data = handle.stdout.read()
		if len(data):
			if 'debug' in opts:
				print(data.decode('UTF-8'), end='')
		#	print(data.decode('UTF-8'), end='')
			output += data
	data = handle.stdout.read()
	if 'debug' in opts:
		print(data.decode('UTF-8'), end='')
	output += data
	handle.stdin.close()
	handle.stdout.close()
	return output

def get_drive_from_uuid(uuid):
	if len(harddrives) <= 0: raise ValueError("No hard drives to iterate in order to find: {}".format(uuid))

	for drive in harddrives:
		#for partition in psutil.disk_partitions('/dev/{}'.format(name)):
		#	pass #blkid -s PARTUUID -o value /dev/sda2
		o = simple_command(f'blkid -s PTUUID -o value /dev/{drive}')
		if len(o) and o == uuid:
			return drive

	return None

def get_drive_from_part_uuid(partuuid):
	if len(harddrives) <= 0: raise ValueError("No hard drives to iterate in order to find: {}".format(uuid))

	for drive in harddrives:
		for partition in grab_partitions(f'/dev/{drive}'):
			o = simple_command(f'blkid -s PARTUUID -o value /dev/{drive}')
			if len(o) and o == partuuid:
				return drive

	return None

def update_git(branch='master'):
	default_gw = get_default_gateway_linux()
	if(default_gw):
		print('[N] Checking for updates...')
		## Not the most elegant way to make sure git conflicts doesn't occur (yea fml)
		if os.path.isfile('/root/archinstall/archinstall.py'):
			os.remove('/root/archinstall/archinstall.py')
		if os.path.isfile('/root/archinstall/README.md'):
			os.remove('/root/archinstall/README.md')

		output = simple_command('(cd /root/archinstall; git reset --hard origin/$(git branch | grep "*" | cut -d\' \' -f 2); git pull)')

		if b'error:' in output:
			print('[N] Could not update git source for some reason.')
			return

		# b'From github.com:Torxed/archinstall\n   339d687..80b97f3  master     -> origin/master\nUpdating 339d687..80b97f3\nFast-forward\n README.md | 2 +-\n 1 file changed, 1 insertion(+), 1 deletion(-)\n'
		if output != b'Already up to date' or branch != 'master':
			#tmp = re.findall(b'[0-9]+ file changed', output)
			#print(tmp)
			#if len(tmp):
			#	num_changes = int(tmp[0].split(b' ',1)[0])
			#	if(num_changes):

			if branch != 'master':
				print(f'[N] Changing branch to {branch}')
				output = simple_command(f'(cd /root/archinstall; git checkout {branch}; git pull)')
			
			if not 'rebooted' in args:
				## Reboot the script (in same context)
				print('[N] Rebooting the script')
				os.execv('/usr/bin/python3', ['archinstall.py'] + sys.argv + ['--rebooted',])
				extit(1)

def device_state(name):
	# Based out of: https://askubuntu.com/questions/528690/how-to-get-list-of-all-non-removable-disk-device-names-ssd-hdd-and-sata-ide-onl/528709#528709
	if os.path.isfile('/sys/block/{}/device/block/{}/removable'.format(name, name)):
		with open('/sys/block/{}/device/block/{}/removable'.format(name, name)) as f:
			if f.read(1) == '1':
				return

	path = rootdir_pattern.sub('', os.readlink('/sys/block/{}'.format(name)))
	hotplug_buses = ("usb", "ieee1394", "mmc", "pcmcia", "firewire")
	for bus in hotplug_buses:
		if os.path.exists('/sys/bus/{}'.format(bus)):
			for device_bus in os.listdir('/sys/bus/{}/devices'.format(bus)):
				device_link = rootdir_pattern.sub('', os.readlink('/sys/bus/{}/devices/{}'.format(bus, device_bus)))
				if re.search(device_link, path):
					return
	return True

def grab_partitions(dev):
	drive_name = os.path.basename(dev)
	parts = oDict()
	#o = b''.join(sys_command('/usr/bin/lsblk -o name -J -b {dev}'.format(dev=dev)).exec())
	o = b''.join(sys_command('/usr/bin/lsblk -J {dev}'.format(dev=dev)).exec())
	if b'not a block device' in o:
		## TODO: Replace o = sys_command() with code, o = sys_command()
		##       and make sys_command() return the exit-code, way safer than checking output strings :P
		return {}

	if not o[:1] == b'{':
		print('[E] Error in getting blk devices:', o)
		exit(1)

	r = json.loads(o.decode('UTF-8'))
	if len(r['blockdevices']) and 'children' in r['blockdevices'][0]:
		for part in r['blockdevices'][0]['children']:
			#size = os.statvfs(dev + part['name'][len(drive_name):])
			parts[part['name'][len(drive_name):]] = {
				#'size' : size.f_frsize * size.f_bavail,
				#'blocksize' : size.f_frsize * size.f_blocks
				'size' : part['size']
			}

	return parts

def update_drive_list():
	for path in glob('/sys/block/*/device'):
		name = re.sub('.*/(.*?)/device', '\g<1>', path)
		if device_state(name):
			harddrives['/dev/{}'.format(name)] = psutil.disk_usage('/dev/{}'.format(name))

def multisplit(s, splitters):
	s = [s,]
	for key in splitters:
		ns = []
		for obj in s:
			x = obj.split(key)
			for index, part in enumerate(x):
				if len(part):
					ns.append(part)
				if index < len(x)-1:
					ns.append(key)
		s = ns
	return s

def grab_url_data(path):
	safe_path = path[:path.find(':')+1]+''.join([item if item in ('/', '?', '=', '&') else urllib.parse.quote(item) for item in multisplit(path[path.find(':')+1:], ('/', '?', '=', '&'))])
	ssl_context = ssl.create_default_context()
	ssl_context.check_hostname = False
	ssl_context.verify_mode=ssl.CERT_NONE
	response = urllib.request.urlopen(safe_path, context=ssl_context)
	return response.read()

def get_application_instructions(target):
	instructions = {}
	try:
		instructions = grab_url_data('{}/applications/{}.json'.format(args['profiles-path'], target)).decode('UTF-8')
		print('[N] Found application instructions for: {}'.format(target))
	except urllib.error.HTTPError:
		print('[N] No instructions found for: {}'.format(target))
		print('[N] Trying local instructions under ./deployments/applications')
		local_path = './deployments/applications' if os.path.isfile('./archinstall.py') else './archinstall/deployments/applications' # Dangerous assumption
		if os.path.isfile(f'{local_path}/{target}.json'):
			with open(f'{local_path}/{target}.json', 'r') as fh:
				instructions = fh.read()

			print('[N] Found local application instructions for: {}'.format(target))
		else:
			return instructions
	
	try:
		instructions = json.loads(instructions, object_pairs_hook=oDict)
	except:
		print('[E] JSON syntax error in {}'.format('{}/applications/{}.json'.format(args['profiles-path'], target)))
		traceback.print_exc()
		exit(1)

	return instructions

def get_instructions(target):
	instructions = {}
	try:
		instructions = grab_url_data('{}/{}.json'.format(args['profiles-path'], target)).decode('UTF-8')
		print('[N] Found net-deploy instructions called: {}'.format(target))
	except urllib.error.HTTPError:
		print('[N] No instructions found called: {}'.format(target))
		print('[N] Trying local instructions under ./deployments')
		local_path = './deployments' if os.path.isfile('./archinstall.py') else './archinstall/deployments' # Dangerous assumption
		if os.path.isfile(f'{local_path}/{target}.json'):
			with open(f'{local_path}/{target}.json', 'r') as fh:
				instructions = fh.read()

			print('[N] Found local instructions called: {}'.format(target))
		else:
			return instructions
	
	try:
		instructions = json.loads(instructions, object_pairs_hook=oDict)
	except:
		print('[E] JSON syntax error in {}'.format('{}/{}.json'.format(args['profiles-path'], target)))
		traceback.print_exc()
		exit(1)

	return instructions

def merge_dicts(d1, d2, before=True, overwrite=False):
	""" Merges d2 into d1 """
	if before:
		d1, d2 = d2.copy(), d1.copy()
		overwrite = True

	for key, val in d2.items():
		if key in d1:
			if type(d1[key]) in [dict, oDict] and type(d2[key]) in [dict, oDict]:
				d1[key] = merge_dicts(d1[key] if not before else d2[key], d2[key] if not before else d1[key], before=before, overwrite=overwrite)
			elif overwrite:
				d1[key] = val
		else:
			d1[key] = val

	return d1

def random_string(l):
	return ''.join(choice(ascii_uppercase + ascii_lowercase + digits) for i in range(l))

if __name__ == '__main__':
	update_git() # Breaks and restarts the script if an update was found.
	update_drive_list()
	if not os.path.isdir('/sys/firmware/efi'):
		print('[E] This script only supports UEFI-booted machines.')
		exit(1)

	## Setup some defaults (in case no command-line parameters or netdeploy-params were given)
	if not 'size' in args: args['size'] = '100%'
	if not 'start' in args: args['start'] = '513MiB'
	if not 'pwfile' in args: args['pwfile'] = '/tmp/diskpw'
	if not 'hostname' in args: args['hostname'] = 'Archinstall'
	if not 'country' in args: args['country'] = 'SE' # 'all' if we don't want country specific mirrors.
	if not 'packages' in args: args['packages'] = '' # extra packages other than default
	if not 'post' in args: args['post'] = 'reboot'
	if not 'password' in args: args['password'] = '0000' # Default disk passord, can be <STDIN> or a fixed string
	if not 'default' in args: args['default'] = False
	if not 'profile' in args: args['profile'] = None
	if not 'profiles-path' in args: args['profiles-path'] = profiles_path
	if not 'rerun' in args: args['rerun'] = None
	if not 'aur-support' in args: args['aur-support'] = True # Support adds yay (https://github.com/Jguer/yay) in installation steps.
	if not 'ignore-rerun' in args: args['ignore-rerun'] = False
	if not 'localtime' in args: args['localtime'] = 'Europe/Stockholm' if args['country'] == 'SE' else 'GMT+0' # TODO: Arbitrary for now
	if not 'drive' in args:
		drives = sorted(list(harddrives.keys()))
		if len(drives) > 1 and 'force' not in args and ('default' in args and 'first-drive' not in args):
			for index, drive in enumerate(drives):
				print(f'{index}: {drive} ({harddrives[drive]})')
			drive = input('Select one of the above disks (by number): ')
			if not drive.isdigit():
				raise KeyError("Multiple disks found, --drive=/dev/X not specified (or --force/--first-drive)")
			drives = [drives[int(drive)]] # Make sure only the selected drive is in the list of options
		args['drive'] = drives[0] # First drive found
	rerun = args['ignore-rerun']

	if args['drive'][0] != '/':
		## Remap the selected UUID to the device to be formatted.
		drive = get_drive_from_uuid(args['drive'])
		if not drive:
			print(f'[N] Could not map UUID "{args["drive"]}" to a device. Trying to match via PARTUUID instead!')

			drive = get_drive_from_part_uuid(args['drive'])
			if not drive:
				print(f'[E] Could not map UUID "{args["drive"]}" to a device. Aborting!')
				exit(1)

		args['drive'] = drive

	## == If we got networking,
	#     Try fetching instructions for this box and execute them.
	instructions = {}
	if get_default_gateway_linux():
		locmac = get_local_MACs()
		if not len(locmac):
			print('[N] No network interfaces - No net deploy.')
		else:
			for mac in locmac:
				instructions = get_instructions(mac)

				if 'args' in instructions:
					## == Recursively fetch instructions if "include" is found under {args: ...}
					while 'include' in instructions['args']:
						includes = instructions['args']['include']
						print('[!] Importing net-deploy target: {}'.format(includes))
						del(instructions['args']['include'])
						if type(includes) in (dict, list):
							for include in includes:
								instructions = merge_dicts(instructions, get_instructions(include), before=True)
						else:
							instructions = merge_dicts(instructions, get_instructions(includes), before=True)

					## Update arguments if we found any
					for key, val in instructions['args'].items():
						args[key] = val
	else:
		print('[N] No gateway - No net deploy')

	if args['profile'] and not args['default']:
		instructions = get_instructions(args['profile'])
		if len(instructions) <= 0:
			print('[E] No instructions by the name of {} was found.'.format(args['profile']))
			print('    Installation won\'t continue until a valid profile is given.')
			print('   (this is because --profile was given and a --default is not given)')
			exit(1)
	else:
		first = True
		while not args['default'] and not args['profile'] and len(instructions) <= 0:
			profile = input('What template do you want to install: ')
			instructions = get_instructions(profile)
			if first and len(instructions) <= 0:
				print('[E] No instructions by the name of {} was found.'.format(profile))
				print('    Installation won\'t continue until a valid profile is given.')
				print('   (this is because --default is not instructed and no --profile given)')
				first = False


	if 'args' in instructions:
		## == Recursively fetch instructions if "include" is found under {args: ...}
		while 'include' in instructions['args']:
			includes = instructions['args']['include']
			print('[!] Importing net-deploy target: {}'.format(includes))
			del(instructions['args']['include'])
			if type(includes) in (dict, list):
				for include in includes:
					instructions = merge_dicts(instructions, get_instructions(include), before=True)
			else:
				instructions = merge_dicts(instructions, get_instructions(includes), before=True)

		## Update arguments if we found any
		for key, val in instructions['args'].items():
			args[key] = val

	if 'args' in instructions:
		## TODO: Reuseable code, there's to many get_instructions, merge_dictgs and args updating going on.
		## Update arguments if we found any
		for key, val in instructions['args'].items():
			args[key] = val

	for key in args:
		if args[key] == '<STDIN>': args[key] = input(f'Enter a value for {key}: ')
		elif args[key] == '<RND_STR>': args[key] = random_string(32)
		elif args[key] == '<YUBIKEY>':
			args[key] = gen_yubikey_password()
			if not args[key]:
				print('[E] Failed to setup a yubikey password, is it plugged in?')
				exit(1)

#	if args['password'] == '<STDIN>': args['password'] = input('Enter a disk (and root) password: ')
#	elif args['password'] == '<YUBIKEY>':
#		args['password'] = gen_yubikey_password()
#		if not args['password']:

	print(json.dumps(args, indent=4))
	if args['default'] and not 'force' in args:
		if(input('Are these settings OK? (No return beyond this point) N/y: ').lower() != 'y'):
			exit(1)

	if not os.path.isfile(args['pwfile']):
		#PIN = '0000'
		with open(args['pwfile'], 'w') as pw:
			pw.write(args['password'])
	#else:
	#	## TODO: Convert to `rb` instead.
	#	#        We shouldn't discriminate \xfu from being a passwd phrase.
	#	with open(args['pwfile'], 'r') as pw:
	#		PIN = pw.read().strip()



	print()
	print('[!] Disk PASSWORD is: {}'.format(args['password']))
	print()

	if not args['rerun'] or args['ignore-rerun']:
		for i in range(5, 0, -1):
			print(f'Formatting {args["drive"]} in {i}...')
			sleep(1)

		o = simple_command('/usr/bin/umount -R /mnt')
		o = simple_command('/usr/bin/cryptsetup close /dev/mapper/luksdev')
		print('[N] Setting up {drive}.'.format(**args))
		# dd if=/dev/random of=args['drive'] bs=4096 status=progress
		# https://github.com/dcantrell/pyparted	would be nice, but isn't officially in the repo's #SadPanda
		o = b''.join(sys_command('/usr/bin/parted -s {drive} mklabel gpt'.format(**args)).exec())
		o = b''.join(sys_command('/usr/bin/parted -s {drive} mkpart primary FAT32 1MiB {start}'.format(**args)).exec())
		o = b''.join(sys_command('/usr/bin/parted -s {drive} name 1 "EFI"'.format(**args)).exec())
		o = b''.join(sys_command('/usr/bin/parted -s {drive} set 1 esp on'.format(**args)).exec())
		o = b''.join(sys_command('/usr/bin/parted -s {drive} set 1 boot on'.format(**args)).exec())
		o = b''.join(sys_command('/usr/bin/parted -s {drive} mkpart primary {start} {size}'.format(**args)).exec())
		# TODO: grab paritions after each parted/partition step instead of guessing which partiton is which later on.
		#       Create one, grab partitions - dub that to "boot" or something. do the next partition, grab that and dub it "system".. or something..
		#       This "assumption" has bit me in the ass so many times now I've stoped counting.. Jerker is right.. Don't do it like this :P
	
	args['paritions'] = grab_partitions(args['drive'])
	print(f'Partitions: (Boot: {list(args["paritions"].keys())[0]})')

	if len(args['paritions']) <= 0:
		print('[E] No paritions were created on {drive}'.format(**args), o)
		exit(1)
	for index, part_name in enumerate(sorted(args['paritions'].keys())):
		args['partition_{}'.format(index+1)] = part_name
		print(f'Partition info: {part_name}')
		print(json.dumps(args['paritions'][part_name], indent=4))

	if not args['rerun'] or args['ignore-rerun']:
		o = b''.join(sys_command('/usr/bin/mkfs.vfat -F32 {drive}{partition_1}'.format(**args)).exec())
		if (b'mkfs.fat' not in o and b'mkfs.vfat' not in o) or b'command not found' in o:
			print('[E] Could not setup {drive}{partition_1}'.format(**args), o)
			exit(1)

		# "--cipher sha512" breaks the shit.
		# TODO: --use-random instead of --use-urandom
		print('[N] Adding encryption to {drive}{partition_2}.'.format(**args))
		o = b''.join(sys_command('/usr/bin/cryptsetup -q -v --type luks2 --pbkdf argon2i --hash sha512 --key-size 512 --iter-time 10000 --key-file {pwfile} --use-urandom luksFormat {drive}{partition_2}'.format(**args)).exec())
		if not b'Command successful.' in o:
			print('[E] Failed to setup disk encryption.', o)
			exit(1)

	o = b''.join(sys_command('/usr/bin/file /dev/mapper/luksdev').exec()) # /dev/dm-0
	if b'cannot open' in o:
		o = b''.join(sys_command('/usr/bin/cryptsetup open {drive}{partition_2} luksdev --key-file {pwfile} --type luks2'.format(**args)).exec())
	o = b''.join(sys_command('/usr/bin/file /dev/mapper/luksdev').exec()) # /dev/dm-0
	if b'cannot open' in o:
		print('[E] Could not open encrypted device.', o)
		exit(1)

	if not args['rerun'] or args['ignore-rerun']:
		print('[N] Creating btrfs filesystem inside {drive}{partition_2}'.format(**args))
		o = b''.join(sys_command('/usr/bin/mkfs.btrfs -f /dev/mapper/luksdev').exec())
		if not b'UUID' in o:
			print('[E] Could not setup btrfs filesystem.', o)
			exit(1)

	o = simple_command('/usr/bin/mount | /usr/bin/grep /mnt') # /dev/dm-0
	if len(o) <= 0:
		o = b''.join(sys_command('/usr/bin/mount /dev/mapper/luksdev /mnt').exec())

	os.makedirs('/mnt/boot', exist_ok=True)
	o = simple_command('/usr/bin/mount | /usr/bin/grep /mnt/boot') # /dev/dm-0
	if len(o) <= 0:
		o = b''.join(sys_command('/usr/bin/mount {drive}{partition_1} /mnt/boot'.format(**args)).exec())

	if 'mirrors' in args and args['mirrors'] and 'country' in args and get_default_gateway_linux():
		print('[N] Reordering mirrors.')
		o = simple_command("/usr/bin/wget 'https://www.archlinux.org/mirrorlist/?country={country}&protocol=https&ip_version=4&ip_version=6&use_mirror_status=on' -O /root/mirrorlist".format(**args))
		o = simple_command("/usr/bin/sed -i 's/#Server/Server/' /root/mirrorlist")
		o = simple_command('/usr/bin/rankmirrors -n 6 /root/mirrorlist > /etc/pacman.d/mirrorlist')

	pre_conf = {}
	if 'pre' in instructions:
		pre_conf = instructions['pre']
	elif 'prerequisits' in instructions:
		pre_conf = instructions['prerequisits']

	if 'git-branch' in pre_conf:
		update_git(pre_conf['git-branch'])
		del(pre_conf['git-branch'])

	## Prerequisit steps needs to NOT be executed in arch-chroot.
	## Mainly because there's no root structure to chroot into.
	## But partly because some configurations need to be done against the live CD.
	## (For instance, modifying mirrors are done on LiveCD and replicated intwards)
	for title in pre_conf:
		print('[N] Network prerequisit step: {}'.format(title))
		if args['rerun'] and args['rerun'] != title and not rerun:
			continue
		else:
			rerun = True

		for command in pre_conf[title]:
			raw_command = command
			opts = pre_conf[title][raw_command] if type(pre_conf[title][raw_command]) in (dict, oDict) else {}
			if len(opts):
				if 'pass-args' in opts or 'format' in opts:
					command = command.format(**args)
					## FIXME: Instead of deleting the two options
					##        in order to mute command output further down,
					##        check for a 'debug' flag per command and delete these two
					if 'pass-args' in opts:
						del(opts['pass-args'])
					elif 'format' in opts:
						del(opts['format'])
				elif 'debug' in opts and opts['debug']:
					print('[N] Complete command-string: '.format(command))
				else:
					print('[-] Options: {}'.format(opts))

			#print('[N] Command: {} ({})'.format(raw_command, opts))
			o = b''.join(sys_command('{c}'.format(c=command), opts).exec())
			if type(conf[title][raw_command]) == bytes and len(conf[title][raw_command]) and not conf[title][raw_command] in b''.join(o):
				print('[W] Prerequisit step failed: {}'.format(b''.join(o).decode('UTF-8')))
			#print(o)

	if not args['rerun'] or rerun:
		print('[N] Straping in packages.')
		o = b''.join(sys_command('/usr/bin/pacman -Syy').exec())
		o = b''.join(sys_command('/usr/bin/pacstrap /mnt base base-devel linux linux-firmware btrfs-progs efibootmgr nano wpa_supplicant dialog {packages}'.format(**args)).exec())

	if not os.path.isdir('/mnt/etc'): # TODO: This might not be the most long term stable thing to rely on...
		print('[E] Failed to strap in packages', o)
		exit(1)

	if not args['rerun'] or rerun:
		o = b''.join(sys_command('/usr/bin/genfstab -pU /mnt >> /mnt/etc/fstab').exec())
		with open('/mnt/etc/fstab', 'a') as fstab:
			fstab.write('\ntmpfs /tmp tmpfs defaults,noatime,mode=1777 0 0\n') # Redundant \n at the start? who knoes?

		o = b''.join(sys_command('/usr/bin/arch-chroot /mnt rm -f /etc/localtime').exec())
		o = b''.join(sys_command('/usr/bin/arch-chroot /mnt ln -s /usr/share/zoneinfo/{localtime} /etc/localtime'.format(**args)).exec())
		o = b''.join(sys_command('/usr/bin/arch-chroot /mnt hwclock --hctosys --localtime').exec())
		#o = sys_command('arch-chroot /mnt echo "{hostname}" > /etc/hostname'.format(**args)).exec()
		#o = sys_command("arch-chroot /mnt sed -i 's/#\(en_US\.UTF-8\)/\1/' /etc/locale.gen").exec()
		o = b''.join(sys_command("/usr/bin/arch-chroot /mnt sh -c \"echo '{hostname}' > /etc/hostname\"".format(**args)).exec())
		o = b''.join(sys_command("/usr/bin/arch-chroot /mnt sh -c \"echo 'en_US.UTF-8 UTF-8' > /etc/locale.gen\"").exec())
		o = b''.join(sys_command("/usr/bin/arch-chroot /mnt sh -c \"echo 'LANG=en_US.UTF-8' > /etc/locale.conf\"").exec())
		o = b''.join(sys_command('/usr/bin/arch-chroot /mnt locale-gen').exec())
		o = b''.join(sys_command('/usr/bin/arch-chroot /mnt chmod 700 /root').exec())

		with open('/mnt/etc/mkinitcpio.conf', 'w') as mkinit:
			## TODO: Don't replace it, in case some update in the future actually adds something.
			mkinit.write('MODULES=(btrfs)\n')
			mkinit.write('BINARIES=(/usr/bin/btrfs)\n')
			mkinit.write('FILES=()\n')
			mkinit.write('HOOKS=(base udev autodetect modconf block encrypt filesystems keyboard fsck)\n')
		o = b''.join(sys_command('/usr/bin/arch-chroot /mnt mkinitcpio -p linux').exec())
		## WORKAROUND: https://github.com/systemd/systemd/issues/13603#issuecomment-552246188
		o = b''.join(sys_command('/usr/bin/arch-chroot /mnt bootctl --no-variables --path=/boot install').exec())

		with open('/mnt/boot/loader/loader.conf', 'w') as loader:
			loader.write('default arch\n')
			loader.write('timeout 5\n')

		## For some reason, blkid and /dev/disk/by-uuid are not getting along well.
		## And blkid is wrong in terms of LUKS.
		#UUID = sys_command('blkid -s PARTUUID -o value {drive}{partition_2}'.format(**args)).decode('UTF-8').exec().strip()
		UUID = simple_command("ls -l /dev/disk/by-uuid/ | grep {basename}{partition_2} | awk '{{print $9}}'".format(basename=os.path.basename(args['drive']), **args)).decode('UTF-8').strip()
		with open('/mnt/boot/loader/entries/arch.conf', 'w') as entry:
			entry.write('title Arch Linux\n')
			entry.write('linux /vmlinuz-linux\n')
			entry.write('initrd /initramfs-linux.img\n')
			entry.write('options cryptdevice=UUID={UUID}:luksdev root=/dev/mapper/luksdev rw intel_pstate=no_hwp\n'.format(UUID=UUID))

		if args['aur-support']:
			o = b''.join(sys_command('/usr/bin/arch-chroot /mnt sh -c "useradd -m -G wheel aibuilder"').exec())
			o = b''.join(sys_command("/usr/bin/sed -i 's/# %wheel ALL=(ALL) NO/%wheel ALL=(ALL) NO/' /mnt/etc/sudoers").exec())

			o = b''.join(sys_command('/usr/bin/arch-chroot /mnt sh -c "git clone https://aur.archlinux.org/yay.git"').exec())
			o = b''.join(sys_command('/usr/bin/arch-chroot /mnt sh -c "chown -R aibuilder.aibuilder yay"').exec())
			o = b''.join(sys_command('/usr/bin/arch-chroot /mnt sh -c "su - aibuilder -c \"(cd /root/yay; makepkg -si --noconfirm)\" >/dev/null"').exec())
			o = b''.join(sys_command('/usr/bin/arch-chroot /mnt sh -c "sed -i \'s/%wheel ALL=(ALL) NO/# %wheel ALL=(ALL) NO/\' /mnt/etc/sudoers"').exec())
			o = b''.join(sys_command('/usr/bin/arch-chroot /mnt sh -c "userdel aibuilder"').exec())
			o = b''.join(sys_command('/usr/bin/arch-chroot /mnt sh -c "rm -rf /home/aibuilder"').exec())
			
	conf = {}
	if 'post' in instructions:
		conf = instructions['post']
	elif not 'args' in instructions and len(instructions):
		conf = instructions

	if 'git-branch' in conf:
		update_git(conf['git-branch'])
		del(conf['git-branch'])

	for title in conf:
		if args['rerun'] and args['rerun'] != title and not rerun:
			continue
		else:
			rerun = True

		print('[N] Network Deploy: {}'.format(title))
		if type(conf[title]) == str:
			print('[N] Loading {} configuration'.format(conf[title]))
			conf[title] = get_application_instructions(conf[title])
		for command in conf[title]:
			raw_command = command
			opts = conf[title][command] if type(conf[title][command]) in (dict, oDict) else {}
			if len(opts):
				if 'pass-args' in opts or 'format' in opts:
					command = command.format(**args)
					## FIXME: Instead of deleting the two options
					##        in order to mute command output further down,
					##        check for a 'debug' flag per command and delete these two
					if 'pass-args' in opts:
						del(opts['pass-args'])
					elif 'format' in opts:
						del(opts['format'])
				elif ('debug' in opts and opts['debug']) or ('debug' in conf and conf['debug']):
					print('[-] Options: {}'.format(opts))
			if 'pass-args' in opts and opts['pass-args']:
				command = command.format(**args)

			#print('[N] Command: {} ({})'.format(command, opts))

			## https://superuser.com/questions/1242978/start-systemd-nspawn-and-execute-commands-inside
			## !IMPORTANT
			##
			## arch-chroot mounts /run into the chroot environment, this breaks name resolves for some reason.
			## Either skipping mounting /run and using traditional chroot is an option, but using
			## `systemd-nspawn -D /mnt --machine temporary` might be a more flexible solution in case of file structure changes.
			if 'no-chroot' in opts and opts['no-chroot']:
				o = simple_command(command, opts)
			elif 'chroot' in opts and opts['chroot']:
				## Run in a manually set up version of arch-chroot (arch-chroot will break namespaces).
				## This is a bit risky in case the file systems changes over the years, but we'll probably be safe adding this as an option.
				## **> Prefer if possible to use 'no-chroot' instead which "live boots" the OS and runs the command.
				o = simple_command("mount /dev/mapper/luksdev /mnt")
				o = simple_command("cd /mnt; cp /etc/resolv.conf etc")
				o = simple_command("cd /mnt; mount -t proc /proc proc")
				o = simple_command("cd /mnt; mount --make-rslave --rbind /sys sys")
				o = simple_command("cd /mnt; mount --make-rslave --rbind /dev dev")
				o = simple_command('chroot /mnt /bin/bash -c "{c}"'.format(c=command), opts=opts)
				o = simple_command("cd /mnt; umount -R dev")
				o = simple_command("cd /mnt; umount -R sys") 	
				o = simple_command("cd /mnt; umount -R proc")
			else:
				if 'boot' in opts and opts['boot']:
					## So, if we're going to boot this maddafakker up, we'll need to
					## be able to login. The quickest way is to just add automatic login.. so lessgo!
					
					## Turns out.. that didn't work exactly as planned..
					## 
					# if not os.path.isdir('/mnt/etc/systemd/system/console-getty.service.d/'):
					# 	os.makedirs('/mnt/etc/systemd/system/console-getty.service.d/')
					# with open('/mnt/etc/systemd/system/console-getty.service.d/override.conf', 'w') as fh:
					# 	fh.write('[Service]\n')
					# 	fh.write('ExecStart=\n')
					# 	fh.write('ExecStart=-/usr/bin/agetty --autologin root -s %I 115200,38400,9600 vt102\n')

					## So we'll add a bunch of triggers instead and let the sys_command manually react to them.
					## "<hostname> login" followed by "Passwodd" in case it's been set in a previous step.. usually this shouldn't be nessecary
					## since we set the password as the last step. And then the command itself which will be executed by looking for:
					##    [root@<hostname> ~]#
					o = b''.join(sys_command('/usr/bin/systemd-nspawn -D /mnt -b --machine temporary', opts={'triggers' : {
																												bytes(f'login:', 'UTF-8') : b'root\n',
																												#b'Password:' : bytes(args['password']+'\n', 'UTF-8'),
																												bytes(f'[root@{args["hostname"]} ~]#', 'UTF-8') : bytes(command+'\n', 'UTF-8'),
																											}, **opts}).exec())

					## Not needed anymore: And cleanup after out selves.. Don't want to leave any residue..
					# os.remove('/mnt/etc/systemd/system/console-getty.service.d/override.conf')
				else:
					o = b''.join(sys_command('/usr/bin/systemd-nspawn -D /mnt --machine temporary {c}'.format(c=command), opts=opts).exec())
			if type(conf[title][raw_command]) == bytes and len(conf[title][raw_command]) and not conf[title][raw_command] in o:
				print('[W] Post install command failed: {}'.format(o.decode('UTF-8')))
			#print(o)

	## == Passwords
	# o = sys_command('arch-chroot /mnt usermod --password {} root'.format(args['password']))
	# o = sys_command("arch-chroot /mnt sh -c 'echo {pin} | passwd --stdin root'".format(pin='"{pin}"'.format(**args, pin=args['password'])), echo=True)
	o = simple_command("/usr/bin/arch-chroot /mnt sh -c \"echo 'root:{pin}' | chpasswd\"".format(**args, pin=args['password']))
	if 'user' in args:
		o = ('/usr/bin/arch-chroot /mnt useradd -m -G wheel {user}'.format(**args))
		o = ("/usr/bin/arch-chroot /mnt sh -c \"echo '{user}:{pin}' | chpasswd\"".format(**args, pin=args['password']))

	if args['post'] == 'reboot':
		o = simple_command('/usr/bin/umount -R /mnt')
		o = simple_command('/usr/bin/reboot now')
	else:
		print('Done. "umount -R /mnt; reboot" when you\'re done tinkering.')