import Crypto
import asyncio
import click
import json
import logging
import platform
import yaml

from datetime import datetime
from urllib.parse import urlparse

from . import __version__
from .application import Application
from .database import DEFAULT_CONFIG, RELAY_SOFTWARE
from .http_client import get, post, fetch_nodeinfo
from .misc import Message, boolean, check_open_port


app = None
CONFIG_IGNORE = {
	'privkey',
	'version'
}


@click.group('cli', context_settings={'show_default': True}, invoke_without_command=True)
@click.option('--config', '-c', help='path to the relay\'s config')
@click.version_option(version=__version__, prog_name='ActivityRelay')
@click.pass_context
def cli(ctx, config):
	global app
	app = Application(config)

	if ctx.invoked_subcommand != 'convert':
		app.setup()

	if not ctx.invoked_subcommand:
		if app.config.host.endswith('example.com'):
			cli_setup.callback()

		else:
			cli_run.callback()


@cli.command('convert')
@click.option('--old-config', '-o', help='path to the old relay config')
def cli_convert(old_config):
	with open(old_config or 'relay.yaml') as fd:
		config = yaml.load(fd.read(), Loader=yaml.SafeLoader)
		ap = config.get('ap', {})

	with open(config.get('db', 'relay.jsonld')) as fd:
		db = json.load(fd)

	app.config['general_host'] = ap.get('host', '__DEFAULT__')
	app.config['general_listen'] = config.get('listen', '__DEFAULT__')
	app.config['general_port'] = config.get('port', '__DEFAULT__')

	with app.database.session as s:
		s.put_config('description', config.get('note', '__DEFAULT__'))
		s.put_config('push_limit', config.get('push_limit', '__DEFAULT__'))
		s.put_config('json_cache', config.get('json_cache', '__DEFAULT__'))
		s.put_config('workers', config.get('workers', '__DEFAULT__'))
		s.put_config('http_timeout', config.get('timeout', '__DEFAULT__'))
		s.put_config('privkey', db.get('private-key'))

		for name in ap.get('blocked_software', []):
			try: s.put_ban('software', name)
			except KeyError: print(f'Already banned software: {name}')

		for name in ap.get('blocked_instances', []):
			try: s.put_ban('domain', name)
			except KeyError: print(f'Already banned instance: {name}')

		for name in ap.get('whitelist', []):
			try: s.put_whitelist(name)
			except KeyError: print(f'Already whitelisted domain: {name}')

		for instance in db.get('relay-list', {}).values():
			domain = instance['domain']
			software = instance.get('software')
			actor = None

			if software == 'mastodon':
				actor = f'https://{domain}/actor'

			elif software in {'pleroma', 'akkoma'}:
				actor = f'https://{domain}/relay'

			s.put_instance(
				domain = domain,
				inbox = instance.get('inbox'),
				software = software,
				actor = actor,
				followid = instance.get('followid'),
				accept = True
			)

	app.config.save()

	print('Config and database converted :3')


@cli.command('setup')
def cli_setup():
	'Generate a new config'

	while True:
		app.config['general_host'] = click.prompt('What domain will the relay be hosted on?', default=app.config.host)

		if not app.config.host.endswith('example.com'):
			break

		click.echo('The domain must not be example.com')

	if not app.config.is_docker:
		app.config['general_listen'] = click.prompt('Which address should the relay listen on?', default=app.config.listen)

		while True:
			app.config['general_port'] = click.prompt('What TCP port should the relay listen on?', default=app.config.port, type=int)
			break

	app.config.save()

	with app.database.session as s:
		s.put_config('name', click.prompt(
			'What do you want to name your relay?',
			default = s.get_config('name')
		))

		s.put_config('description', click.prompt(
			'Provide a small description of your relay. This will be on the front page',
			default = s.get_config('description')
		))

		s.put_config('whitelist', click.prompt(
			'Enable the whitelist?',
			default = s.get_config('whitelist'),
			type = boolean
		))

		s.put_config('require_approval', click.prompt(
			'Require instances to be approved when following?',
			default = s.get_config('require_approval'),
			type = boolean
		))

	if not app.config.is_docker and click.confirm('Relay all setup! Would you like to run it now?'):
		cli_run.callback()


@cli.command('run')
def cli_run():
	'Run the relay'

	with app.database.session as s:
		if not s.get_config('privkey') or app.config.host.endswith('example.com'):
			return click.echo('Relay is not set up. Please run "activityrelay setup".')

	vers_split = platform.python_version().split('.')
	pip_command = 'pip3 uninstall pycrypto && pip3 install pycryptodome'

	if Crypto.__version__ == '2.6.1':
		if int(vers_split[1]) > 7:
			click.echo('Error: PyCrypto is broken on Python 3.8+. Please replace it with pycryptodome before running again. Exiting...')
			return click.echo(pip_command)

		else:
			click.echo('Warning: PyCrypto is old and should be replaced with pycryptodome')
			return click.echo(pip_command)

	if not check_open_port(app.config.listen, app.config.port):
		return click.echo(f'Error: A server is already running on port {app.config.port}')

	app.run()


# todo: add config default command for resetting config key
@cli.group('config')
def cli_config():
	'Manage the relay config'
	pass


@cli_config.command('list')
def cli_config_list():
	'List the current relay config'

	click.echo('Relay Config:')

	with app.database.session as s:
		config = s.get_config_all()

		for key in DEFAULT_CONFIG.keys():
			if key in CONFIG_IGNORE:
				continue

			keystr = f'{key}:'.ljust(20)
			click.echo(f'- {keystr} {config[key]}')


@cli_config.command('set')
@click.argument('key')
@click.argument('value', nargs=-1)
def cli_config_set(key, value):
	'Set a config value'

	with app.database.session as s:
		s.put_config(key, ' '.join(value))
		value = s.get_config(key)

	print(f'{key}: {value}')


@cli.group('inbox')
def cli_inbox():
	'Manage the inboxes in the database'
	pass


@cli_inbox.command('list')
def cli_inbox_list():
	'List the connected instances or relays'

	click.echo('Connected to the following instances or relays:')

	with app.database.session as s:
		for instance in s.get_instances():
			click.echo(f'- {instance.inbox}')


@cli_inbox.command('follow')
@click.argument('actor')
def cli_inbox_follow(actor):
	'Follow an actor (Relay must be running)'

	if not actor.startswith('http'):
		domain = actor
		actor = f'https://{actor}/actor'

	else:
		domain = urlparse(actor).hostname

	with app.database.session as s:
		if s.get_ban('domain', domain):
			return click.echo(f'Error: Refusing to follow banned actor: {actor}')

		instance = s.get_instance(domain)

		if not instance:
			actor_data = asyncio.run(get(actor, sign_headers=True))

			if not actor_data:
				return click.echo(f'Failed to fetch actor: {actor}')

			inbox = actor_data.shared_inbox

		else:
			inbox = instance.inbox

			if instance.actor:
				actor = instance.actor

	message = Message.new_follow(
		host = app.config.host,
		actor = actor
	)

	asyncio.run(post(inbox, message))
	click.echo(f'Sent follow message to actor: {actor}')


@cli_inbox.command('unfollow')
@click.argument('actor')
def cli_inbox_unfollow(actor):
	'Unfollow an actor (Relay must be running)'

	followid = None

	if not actor.startswith('http'):
		domain = actor
		actor = f'https://{actor}/actor'

	else:
		domain = urlparse(actor).hostname

	with app.database.session as s:
		instance = s.get_instance(domain)

		if not instance:
			actor_data = asyncio.run(get(actor, sign_headers=True))

			if not actor_data:
				return click.echo(f'Failed to fetch actor: {actor}')

			inbox = actor_data.shared_inbox

		else:
			inbox = instance.inbox
			followid = instance.followid

			if instance.actor:
				actor = instance.actor

	if followid:
		message = Message.new_unfollow(
			host = app.config.host,
			actor = actor,
			follow = followid
		)

	else:
		message = misc.Message.new_unfollow(
			host = app.config.host,
			actor = actor,
			follow = {
				'type': 'Follow',
				'object': actor,
				'actor': app.config.actor
			}
		)

	asyncio.run(post(inbox, message))
	click.echo(f'Sent unfollow message to: {actor}')


@cli_inbox.command('add')
@click.argument('actor')
def cli_inbox_add(actor):
	'Add an instance to the database'

	if not actor.startswith('http'):
		domain = actor
		actor = f'https://{actor}/inbox'

	else:
		domain = urlparse(actor).hostname

	with app.database.session as s:
		data = {
			'domain': domain,
			'actor': actor,
			'inbox': f'https://{domain}/inbox'
		}

		if s.get_instance(domain):
			return click.echo(f'Error: Instance already in database: {domain}')

		if s.get_ban('domain', domain):
			return click.echo(f'Error: Refusing to add banned domain: {domain}')

		nodeinfo = asyncio.run(fetch_nodeinfo(domain))

		if nodeinfo:
			if s.get_ban('software', nodeinfo.sw_name):
				return click.echo(f'Error: Refusing to add banned software: {nodeinfo.sw_name}')

			data['software'] = nodeinfo.sw_name

		actor_data = asyncio.run(get(actor, sign_headers=True))

		if actor_data:
			instance = s.put_instance_actor(actor, nodeinfo)

		else:
			instance = s.put_instance(**data)

	click.echo(f'Added instance to the database: {instance.domain}')


@cli_inbox.command('remove')
@click.argument('domain')
def cli_inbox_remove(domain):
	'Remove an inbox from the database'

	if domain.startswith('http'):
		domain = urlparse(domain).hostname

	with app.database.session as s:
		try:
			s.delete_instance(domain)
			click.echo(f'Removed inbox from the database: {domain}')

		except KeyError:
			return click.echo(f'Error: Inbox does not exist: {domain}')


@cli.group('request')
def cli_request():
	'Manage follow requests'


@cli_request.command('list')
def cli_request_list():
	'List all the current follow requests'

	click.echo('Follow requests:')

	with app.database.session as s:
		for row in s.get_requests():
			click.echo(f'- {row.domain}')


@cli_request.command('approve')
@click.argument('domain')
def cli_request_approve(domain):
	'Approve a follow request'

	with app.database.session as s:
		try:
			instance = s.get_request(domain)

		except KeyError:
			return click.echo(f'No request for domain exists: {domain}')

		data = {'joined': datetime.now()}
		s.update('instances', data, id=instance.id)

		asyncio.run(post(
			instance.inbox,
			Message.new_response(
				host = app.config.host,
				actor = instance.actor,
				followid = instance.followid,
				accept = True
			)
		))

	return click.echo(f'Accepted follow request for domain: {domain}')


@cli_request.command('deny')
@click.argument('domain')
def cli_request_deny(domain):
	'Deny a follow request'

	with app.database.session as s:
		try:
			instance = s.get_request(domain)

		except KeyError:
			return click.echo(f'No request for domain exists: {domain}')

		s.delete_instance(domain)

		asyncio.run(post(
			instance.inbox,
			Message.new_response(
				host = app.config.host,
				actor = instance.actor,
				followid = instance.followid,
				accept = False
			)
		))

	return click.echo(f'Denied follow request for domain: {domain}')


@cli.group('instance')
def cli_instance():
	'Manage instance bans'
	pass


@cli_instance.command('list')
def cli_instance_list():
	'List all banned instances'

	click.echo('Banned instances or relays:')

	with app.database.session as s:
		for row in s.get_bans('domain'):
			click.echo(f'- {row.name}')


@cli_instance.command('ban')
@click.argument('domain')
def cli_instance_ban(domain):
	'Ban an instance and remove the associated inbox if it exists'

	if domain.startswith('http'):
		domain = urlparse(domain).hostname

	with app.database.session as s:
		try:
			s.put_ban('domain', domain)

		except KeyError:
			return click.echo(f'Instance already banned: {domain}')

		try:
			s.delete_instance(domain)

		except KeyError:
			pass

	click.echo(f'Banned instance: {domain}')


@cli_instance.command('unban')
@click.argument('domain')
def cli_instance_unban(domain):
	'Unban an instance'

	if domain.startswith('http'):
		domain = urlparse(domain).hostname

	with app.database.session as s:
		try:
			s.delete_ban('domain', domain)
			click.echo(f'Unbanned instance: {domain}')

		except KeyError:
			click.echo(f'Instance wasn\'t banned: {domain}')


@cli.group('software')
def cli_software():
	'Manage banned software'
	pass


@cli_software.command('list')
def cli_software_list():
	'List all banned software'

	click.echo('Banned software:')

	with app.database.session as s:
		for row in s.get_bans('software'):
			click.echo(f'- {row.name}')


@cli_software.command('ban')
@click.option('--fetch-nodeinfo/--ignore-nodeinfo', '-f', 'fetch_nodeinfo', default=False,
	help='Treat NAME like a domain and try to fet the software name from nodeinfo'
)
@click.argument('name')
def cli_software_ban(name, fetch_nodeinfo):
	'Ban software. Use RELAYS for NAME to ban relays'

	with app.database.session as s:
		if name == 'RELAYS':
			for name in RELAY_SOFTWARE:
				s.put_ban('software', name)

			return click.echo('Banned all relay software')

		if fetch_nodeinfo:
			nodeinfo = asyncio.run(fetch_nodeinfo(name))

			if not nodeinfo:
				return click.echo(f'Failed to fetch software name from domain: {name}')

			name = nodeinfo.sw_name

		try:
			s.put_ban('software', name)
			click.echo(f'Banned software: {name}')

		except KeyError:
			click.echo(f'Software already banned: {name}')


@cli_software.command('unban')
@click.option('--fetch-nodeinfo/--ignore-nodeinfo', '-f', 'fetch_nodeinfo', default=False,
	help='Treat NAME like a domain and try to fet the software name from nodeinfo'
)
@click.argument('name')
def cli_software_unban(name, fetch_nodeinfo):
	'Ban software. Use RELAYS for NAME to unban relays'

	with app.database.session as s:
		if name == 'RELAYS':
			for name in RELAY_SOFTWARE:
				s.put_ban('software', name)

			return click.echo('Unbanned all relay software')

		if fetch_nodeinfo:
			nodeinfo = asyncio.run(fetch_nodeinfo(name))

			if not nodeinfo:
				return click.echo(f'Failed to fetch software name from domain: {name}')

			name = nodeinfo.sw_name

		try:
			s.put_ban('software', name)
			click.echo(f'Unbanned software: {name}')

		except KeyError:
			click.echo(f'Software wasn\'t banned: {name}')


@cli.group('whitelist')
def cli_whitelist():
	'Manage the instance whitelist'
	pass


@cli_whitelist.command('list')
def cli_whitelist_list():
	'List all the instances in the whitelist'

	click.echo('Current whitelisted domains:')

	with app.database.session as s:
		for row in s.get_whitelist():
			click.echo(f'- {row.domain}')


@cli_whitelist.command('add')
@click.argument('domain')
def cli_whitelist_add(domain):
	'Add a domain to the whitelist'

	with app.database.session as s:
		try:
			s.put_whitelist(domain)
			click.echo(f'Instance added to the whitelist: {domain}')

		except KeyError:
			return click.echo(f'Instance already in the whitelist: {domain}')


@cli_whitelist.command('remove')
@click.argument('domain')
def cli_whitelist_remove(domain):
	'Remove a domain from the whitelist'

	with app.database.session as s:
		try:
			s.delete_whitelist(domain)
			click.echo(f'Removed instance from the whitelist: {domain}')

		except KeyError:
			click.echo(f'Instance not in the whitelist: {domain}')


@cli_whitelist.command('import')
def cli_whitelist_import():
	'Add all current inboxes to the whitelist'

	with app.database.session as s:
		for row in s.get_instances():
			try:
				s.put_whitelist(row.domain)
				click.echo(f'Instance added to the whitelist: {row.domain}')

			except KeyError:
				click.echo(f'Instance already in the whitelist: {row.domain}')


@cli_whitelist.command('clear')
def cli_whitelist_clear():
	'Clear all items out of the whitelist'

	with app.database.session as s:
		s.delete('whitelist')


def main():
	cli(prog_name='relay')


if __name__ == '__main__':
	click.echo('Running relay.manage is depreciated. Run `activityrelay [command]` instead.')