import tinysql

from datetime import datetime
from tinysql import Column, Table
from urllib.parse import urlparse

from .logger import set_level
from .misc import AppBase, DotDict, boolean


TABLES = [
	Table('config',
		Column('key', 'text', unique=True, nullable=False, primary_key=True),
		Column('value', 'text')
	),
	Table('instances',
		Column('id', 'serial'),
		Column('domain', 'text', unique=True, nullable=False),
		Column('actor', 'text'),
		Column('inbox', 'text', nullable=False),
		Column('followid', 'text'),
		Column('software', 'text'),
		Column('actor_data', 'json'),
		Column('note', 'text'),
		Column('joined', 'datetime', nullable=False),
		Column('updated', 'datetime')
	),
	Table('whitelist',
		Column('id', 'serial'),
		Column('domain', 'text', unique=True),
		Column('created', 'datetime', nullable=False)
	),
	Table('bans',
		Column('id', 'serial'),
		Column('name', 'text', unique=True),
		Column('note', 'text'),
		Column('type', 'text', nullable=False),
		Column('created', 'datetime', nullable=False)
	),
	Table('users',
		Column('id', 'serial'),
		Column('handle', 'text', unique=True, nullable=False),
		Column('domain', 'text', nullable=False),
		Column('api_token', 'text'),
		Column('created', 'datetime', nullable=False),
		Column('updated', 'datetime')
	),
	Table('tokens',
		Column('id', 'text', unique=True, nullable=False, primary_key=True),
		Column('userid', 'integer', nullable=False),
		Column('created', 'datetime', nullable=False),
		Column('updated', 'datetime')
	)
]

DEFAULT_CONFIG = {
	'description': ('str', 'Make a note about your relay here'),
	'http_timeout': ('int', 10),
	'json_cache': ('int', 1024),
	'log_level': ('str', 'INFO'),
	'name': ('str', 'ActivityRelay'),
	'privkey': ('str', ''),
	'push_limit': ('int', 512),
	'require_approval': ('bool', False),
	'version': ('int', 20221211),
	'whitelist': ('bool', False),
	'workers': ('int', 8)
}

RELAY_SOFTWARE = [
	'activityrelay', # https://git.pleroma.social/pleroma/relay
	'aoderelay', # https://git.asonix.dog/asonix/relay
	'feditools-relay' # https://git.ptzo.gdn/feditools/relay
]


class Database(AppBase, tinysql.Database):
	def __init__(self, **config):
		tinysql.Database.__init__(self, **config,
			connection_class = Connection,
			row_classes = [
				ConfigRow
			]
		)


	def create(self):
		self.create_database(TABLES)


class Connection(tinysql.ConnectionMixin):
	## Misc methods
	def accept_request(self, domain):
		row = self.get_request(domain)

		if not row:
			raise KeyError(domain)

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


	def distill_inboxes(self, message):
		src_domains = {
			message.domain,
			urlparse(message.objectid).netloc
		}

		for instance in self.get_instances():
			if instance.domain not in src_domains:
				yield instance.inbox


	## Delete methods
	def delete_ban(self, type, name):
		row = self.get_ban(type, name)

		if not row:
			raise KeyError(name)

		self.delete('bans', id=row.id)


	def delete_instance(self, domain):
		row = self.get_instance(domain)

		if not row:
			raise KeyError(name)

		self.delete('instances', id=row.id)


	def delete_whitelist(self, domain):
		row = self.get_whitelist_domain(domain)

		if not row:
			raise KeyError(domain)

		self.delete('whitelist', id=row.id)


	## Get methods
	def get_ban(self, type, name):
		if type not in {'software', 'domain'}:
			raise ValueError('Ban type must be "software" or "domain"')

		return self.select('bans', name=name, type=type).one()


	def get_bans(self, type):
		if type not in {'software', 'domain'}:
			raise ValueError('Ban type must be "software" or "domain"')

		return self.select('bans', type=type).all()


	def get_config(self, key):
		if key not in DEFAULT_CONFIG:
			raise KeyError(key)

		row = self.select('config', key=key).one()

		if not row:
			return DEFAULT_CONFIG[key][1]

		return row.get_value()


	def get_config_all(self):
		rows = self.select('config').all()
		config = DotDict({row.key: row.get_value() for row in rows})

		for key, data in DEFAULT_CONFIG.items():
			if key not in config:
				config[key] = data[1]

		return config


	def get_hostnames(self):
		return tuple(row.domain for row in self.get_instances())


	def get_instance(self, data):
		if data.startswith('http') and '#' in data:
			data = data.split('#', 1)[0]

		query = 'SELECT * FROM instances WHERE domain = :data OR actor = :data OR inbox = :data'
		row = self.execute(query, dict(data=data), table='instances').one()
		return row if row.joined else None


	def get_instances(self):
		query = 'SELECT * FROM instances WHERE joined IS NOT NULL'
		return self.execute(query, table='instances').all()


	def get_request(self, domain):
		for instance in self.get_requests():
			if instance.domain == domain:
				return instance

		raise KeyError(domain)


	def get_requests(self):
		query = 'SELECT * FROM instances WHERE joined IS NULL'
		return self.execute(query, table='instances').all()


	def get_whitelist(self):
		return self.select('whitelist').all()


	def get_whitelist_domain(self, domain):
		return self.select('whitelist', domain=domain).one()


	## Put methods
	def put_ban(self, type, name, note=None):
		if type not in {'software', 'domain'}:
			raise ValueError('Ban type must be "software" or "domain"')

		row = self.select('bans', name=name, type=type).one()

		if row:
			if note == None:
				raise KeyError(name)

			data = {'note': note}
			self.update('bans', data, id=row.id)
			return

		self.insert('bans', {
			'name': name,
			'type': type,
			'note': note,
			'created': datetime.now()
		})


	def put_config(self, key, value='__DEFAULT__'):
		if key not in DEFAULT_CONFIG:
			raise KeyError(key)

		if value == '__DEFAULT__':
			value = DEFAULT_CONFIG[key][1]

		if key == 'log_level':
			set_level(value)

		row = self.select('config', key=key).one()

		if row:
			self.update('config', {'value': value}, key=key)
			return

		self.insert('config', {
			'key': key,
			'value': value
		})


	def put_instance(self, domain, actor=None, inbox=None, followid=None, software=None, actor_data=None, note=None, accept=True):
		new_data = {
			'actor': actor,
			'inbox': inbox,
			'followid': followid,
			'software': software,
			'note': note
		}

		if actor_data:
			new_data['actor_data'] = dict(actor_data)

		new_data = {key: value for key, value in new_data.items() if value != None}
		instance = self.get_instance(domain)

		if instance:
			if not new_data:
				raise KeyError(domain)

			instance.update(new_data)
			self.update('instances', new_data, id=instance.id)
			return instance

		if not inbox:
			raise ValueError('Inbox must be included in instance data')

		if accept:
			new_data['joined'] = datetime.now()

		new_data['domain'] = domain

		self.insert('instances', new_data)
		return self.get_instance(domain)


	def put_instance_actor(self, actor, nodeinfo=None, accept=True):
		data = {
			'domain': actor.domain,
			'actor': actor.id,
			'inbox': actor.shared_inbox,
			'actor_data': actor,
			'accept': accept,
			'software': nodeinfo.sw_name if nodeinfo else None
		}

		return self.put_instance(**data)


	def put_whitelist(self, domain):
		if self.get_whitelist_domain(domain):
			raise KeyError(domain)

		self.insert('whitelist', {
			'domain': domain,
			'created': datetime.now()
		})


class ConfigRow(tinysql.Row):
	__table__ = 'config'

	def get_value(self):
		type = DEFAULT_CONFIG[self.key][0]

		if type == 'int':
			return int(self.value)

		elif type == 'bool':
			return boolean(self.value.encode('utf-8'))

		elif type == 'list':
			return json.loads(value)

		elif type == 'json':
			return DotDict.parse(value)

		return self.value