from __future__ import unicode_literals

import frappe
import json

from frappe import _
from frappe.frappeclient import FrappeClient
from frappe.desk.form.load import get_attachments
from six import string_types

current_user = frappe.session.user


@frappe.whitelist()
def register_marketplace(company, company_description):
	validate_registerer()

	settings = frappe.get_single('Marketplace Settings')
	message = settings.register_seller(company, company_description)

	if message.get('hub_seller_name'):
		settings.registered = 1
		settings.hub_seller_name = message.get('hub_seller_name')
		settings.save()

		settings.add_hub_user(frappe.session.user)

	return { 'ok': 1 }


@frappe.whitelist()
def register_users(user_list):
	user_list = json.loads(user_list)

	settings = frappe.get_single('Marketplace Settings')

	for user in user_list:
		settings.add_hub_user(user)

	return user_list


def validate_registerer():
	if current_user == 'Administrator':
		frappe.throw(_('Please login as another user to register on Marketplace'))

	valid_roles = ['System Manager', 'Item Manager']

	if not frappe.utils.is_subset(valid_roles, frappe.get_roles()):
		frappe.throw(_('Only users with {0} role can register on Marketplace').format(', '.join(valid_roles)),
			frappe.PermissionError)


@frappe.whitelist()
def call_hub_method(method, params=None):
	connection = get_hub_connection()

	if isinstance(params, string_types):
		params = json.loads(params)

	params.update({
		'cmd': 'hub.hub.api.' + method
	})

	response = connection.post_request(params)
	return response


def map_fields(items):
	field_mappings = get_field_mappings()
	table_fields = [d.fieldname for d in frappe.get_meta('Item').get_table_fields()]

	hub_seller_name = frappe.db.get_value('Marketplace Settings', 'Marketplace Settings', 'hub_seller_name')

	for item in items:
		for fieldname in table_fields:
			item.pop(fieldname, None)

		for mapping in field_mappings:
			local_fieldname = mapping.get('local_fieldname')
			remote_fieldname = mapping.get('remote_fieldname')

			value = item.get(local_fieldname)
			item.pop(local_fieldname, None)
			item[remote_fieldname] = value

		item['doctype'] = 'Hub Item'
		item['hub_seller'] = hub_seller_name
		item.pop('attachments', None)

	return items


@frappe.whitelist()
def get_valid_items(search_value=''):
	items = frappe.get_list(
		'Item',
		fields=["*"],
		filters={
			'disabled': 0,
			'item_name': ['like', '%' + search_value + '%'],
			'publish_in_hub': 0
		},
		order_by="modified desc"
	)

	valid_items = filter(lambda x: x.image and x.description, items)

	def prepare_item(item):
		item.source_type = "local"
		item.attachments = get_attachments('Item', item.item_code)
		return item

	valid_items = map(prepare_item, valid_items)

	return valid_items

@frappe.whitelist()
def update_item(ref_doc, data):
	data = json.loads(data)

	data.update(dict(doctype='Hub Item', name=ref_doc))
	try:
		connection = get_hub_connection()
		connection.update(data)
	except Exception as e:
		frappe.log_error(message=e, title='Hub Sync Error')

@frappe.whitelist()
def publish_selected_items(items_to_publish):
	items_to_publish = json.loads(items_to_publish)
	items_to_update = []
	if not len(items_to_publish):
		frappe.throw(_('No items to publish'))

	for item in items_to_publish:
		item_code = item.get('item_code')
		frappe.db.set_value('Item', item_code, 'publish_in_hub', 1)

		hub_dict = {
			'doctype': 'Hub Tracked Item',
			'item_code': item_code,
			'published': 1,
			'hub_category': item.get('hub_category'),
			'image_list': item.get('image_list')
		}
		if frappe.db.exists('Hub Tracked Item', item_code):
			items_to_update.append(item)
			hub_tracked_item = frappe.get_doc('Hub Tracked Item', item_code)
			hub_tracked_item.update(hub_dict)
			hub_tracked_item.save()
		else:
			frappe.get_doc(hub_dict).insert(ignore_if_duplicate=True)

	items_to_publish = list(filter(lambda x: x not in items_to_update, items_to_publish))
	new_items = map_fields(items_to_publish)
	existing_items = map_fields(items_to_update)

	try:
		item_sync_preprocess(len(items))
		convert_relative_image_urls_to_absolute(items)

		# TODO: Publish Progress
		connection = get_hub_connection()
		connection.insert_many(new_items)
		connection.bulk_update(existing_items)

		item_sync_postprocess()
	except Exception as e:
		frappe.log_error(message=e, title='Hub Sync Error')

@frappe.whitelist()
def unpublish_item(item_code, hub_item_name):
	''' Remove item listing from the marketplace '''

	response = call_hub_method('unpublish_item', {
		'hub_item_name': hub_item_name
	})

	if response:
		frappe.db.set_value('Item', item_code, 'publish_in_hub', 0)
	else:
		frappe.throw(_('Unable to update remote activity'))

@frappe.whitelist()
def get_unregistered_users():
	settings = frappe.get_single('Marketplace Settings')
	registered_users = [user.user for user in settings.users] + ['Administrator', 'Guest']
	all_users = [user.name for user in frappe.db.get_all('User', filters={'enabled': 1})]
	unregistered_users = [user for user in all_users if user not in registered_users]
	return unregistered_users


def item_sync_preprocess(intended_item_publish_count):
	response = call_hub_method('pre_items_publish', {
		'intended_item_publish_count': intended_item_publish_count
	})

	if response:
		frappe.db.set_value("Marketplace Settings", "Marketplace Settings", "sync_in_progress", 1)
		return response
	else:
		frappe.throw(_('Unable to update remote activity'))


def item_sync_postprocess():
	response = call_hub_method('post_items_publish', {})
	if response:
		frappe.db.set_value('Marketplace Settings', 'Marketplace Settings', 'last_sync_datetime', frappe.utils.now())
	else:
		frappe.throw(_('Unable to update remote activity'))

	frappe.db.set_value('Marketplace Settings', 'Marketplace Settings', 'sync_in_progress', 0)


def convert_relative_image_urls_to_absolute(items):
	from six.moves.urllib.parse import urljoin

	for item in items:
		file_path = item['image']

		if file_path.startswith('/files/'):
			item['image'] = urljoin(frappe.utils.get_url(), file_path)


def get_hub_connection():
	settings = frappe.get_single('Marketplace Settings')
	marketplace_url = settings.marketplace_url
	hub_user = settings.get_hub_user(frappe.session.user)

	if hub_user:
		password = hub_user.get_password()
		hub_connection = FrappeClient(marketplace_url, hub_user.user, password)
		return hub_connection
	else:
		read_only_hub_connection = FrappeClient(marketplace_url)
		return read_only_hub_connection


def get_field_mappings():
	return []