# Copyright (c) 2015, Frappe Technologies Pvt. Ltd. and Contributors
# MIT License. See license.txt

from __future__ import unicode_literals, print_function

import frappe
import unittest, json, sys, os
import time
import xmlrunner
import importlib
from frappe.modules import load_doctype_module, get_module_name
from frappe.utils import cstr
import frappe.utils.scheduler
import cProfile, pstats
from six import StringIO
from six.moves import reload_module
from frappe.model.naming import revert_series_if_last

unittest_runner = unittest.TextTestRunner
SLOW_TEST_THRESHOLD = 2

def xmlrunner_wrapper(output):
	"""Convenience wrapper to keep method signature unchanged for XMLTestRunner and TextTestRunner"""
	def _runner(*args, **kwargs):
		kwargs['output'] = output
		return xmlrunner.XMLTestRunner(*args, **kwargs)
	return _runner

def main(app=None, module=None, doctype=None, verbose=False, tests=(),
	force=False, profile=False, junit_xml_output=None, ui_tests=False,
	doctype_list_path=None, skip_test_records=False, failfast=False):
	global unittest_runner

	if doctype_list_path:
		app, doctype_list_path = doctype_list_path.split(os.path.sep, 1)
		with open(frappe.get_app_path(app, doctype_list_path), 'r') as f:
			doctype = f.read().strip().splitlines()

	xmloutput_fh = None
	if junit_xml_output:
		xmloutput_fh = open(junit_xml_output, 'w')
		unittest_runner = xmlrunner_wrapper(xmloutput_fh)
	else:
		unittest_runner = unittest.TextTestRunner

	try:
		frappe.flags.print_messages = verbose
		frappe.flags.in_test = True

		if not frappe.db:
			frappe.connect()

		# if not frappe.conf.get("db_name").startswith("test_"):
		# 	raise Exception, 'db_name must start with "test_"'

		# workaround! since there is no separate test db
		frappe.clear_cache()
		frappe.utils.scheduler.disable_scheduler()
		set_test_email_config()

		if not frappe.flags.skip_before_tests:
			if verbose:
				print('Running "before_tests" hooks')
			for fn in frappe.get_hooks("before_tests", app_name=app):
				frappe.get_attr(fn)()

		if doctype:
			ret = run_tests_for_doctype(doctype, verbose, tests, force, profile)
		elif module:
			ret = run_tests_for_module(module, verbose, tests, profile)
		else:
			ret = run_all_tests(app, verbose, profile, ui_tests, failfast=failfast)

		frappe.db.commit()

		# workaround! since there is no separate test db
		frappe.clear_cache()
		return ret

	finally:
		if xmloutput_fh:
			xmloutput_fh.flush()
			xmloutput_fh.close()


def set_test_email_config():
	frappe.conf.update({
		"auto_email_id": "test@example.com",
		"mail_server": "smtp.example.com",
		"mail_login": "test@example.com",
		"mail_password": "test",
		"admin_password": "admin"
	})


class TimeLoggingTestResult(unittest.TextTestResult):
	def startTest(self, test):
		self._started_at = time.time()
		super(TimeLoggingTestResult, self).startTest(test)

	def addSuccess(self, test):
		elapsed = time.time() - self._started_at
		name = self.getDescription(test)
		if elapsed >= SLOW_TEST_THRESHOLD:
			self.stream.write("\n{} ({:.03}s)\n".format(name, elapsed))
		super(TimeLoggingTestResult, self).addSuccess(test)


def run_all_tests(app=None, verbose=False, profile=False, ui_tests=False, failfast=False):
	import os

	apps = [app] if app else frappe.get_installed_apps()

	test_suite = unittest.TestSuite()
	for app in apps:
		for path, folders, files in os.walk(frappe.get_pymodule_path(app)):
			for dontwalk in ('locals', '.git', 'public'):
				if dontwalk in folders:
					folders.remove(dontwalk)

			# print path
			for filename in files:
				filename = cstr(filename)
				if filename.startswith("test_") and filename.endswith(".py")\
					and filename != 'test_runner.py':
					# print filename[:-3]
					_add_test(app, path, filename, verbose,
						test_suite, ui_tests)

	if profile:
		pr = cProfile.Profile()
		pr.enable()

	out = unittest_runner(resultclass=TimeLoggingTestResult, verbosity=1+(verbose and 1 or 0), failfast=failfast).run(test_suite)

	if profile:
		pr.disable()
		s = StringIO()
		ps = pstats.Stats(pr, stream=s).sort_stats('cumulative')
		ps.print_stats()
		print(s.getvalue())

	return out

def run_tests_for_doctype(doctypes, verbose=False, tests=(), force=False, profile=False):
	modules = []
	if not isinstance(doctypes, (list, tuple)):
		doctypes = [doctypes]

	for doctype in doctypes:
		module = frappe.db.get_value("DocType", doctype, "module")
		if not module:
			print('Invalid doctype {0}'.format(doctype))
			sys.exit(1)

		test_module = get_module_name(doctype, module, "test_")
		if force:
			for name in frappe.db.sql_list("select name from `tab%s`" % doctype):
				frappe.delete_doc(doctype, name, force=True)
		make_test_records(doctype, verbose=verbose, force=force)
		modules.append(importlib.import_module(test_module))

	return _run_unittest(modules, verbose=verbose, tests=tests, profile=profile)

def run_tests_for_module(module, verbose=False, tests=(), profile=False):
	module = importlib.import_module(module)
	if hasattr(module, "test_dependencies"):
		for doctype in module.test_dependencies:
			make_test_records(doctype, verbose=verbose)

	return _run_unittest(module, verbose=verbose, tests=tests, profile=profile)

def run_setup_wizard_ui_test(app=None, verbose=False, profile=False):
	'''Run setup wizard UI test using test_test_runner'''
	frappe.flags.run_setup_wizard_ui_test = 1
	return run_ui_tests(app=app, test=None, verbose=verbose, profile=profile)

def run_ui_tests(app=None, test=None, test_list=None, verbose=False, profile=False):
	'''Run a single unit test for UI using test_test_runner'''
	module = importlib.import_module('frappe.tests.ui.test_test_runner')
	frappe.flags.ui_test_app = app
	if test_list:
		frappe.flags.ui_test_list = test_list
	else:
		frappe.flags.ui_test_path = test
	return _run_unittest(module, verbose=verbose, tests=(), profile=profile)

def _run_unittest(modules, verbose=False, tests=(), profile=False):
	test_suite = unittest.TestSuite()

	if not isinstance(modules, (list, tuple)):
		modules = [modules]

	for module in modules:
		module_test_cases = unittest.TestLoader().loadTestsFromModule(module)
		if tests:
			for each in module_test_cases:
				for test_case in each.__dict__["_tests"]:
					if test_case.__dict__["_testMethodName"] in tests:
						test_suite.addTest(test_case)
		else:
			test_suite.addTest(module_test_cases)

	if profile:
		pr = cProfile.Profile()
		pr.enable()

	frappe.flags.tests_verbose = verbose

	out = unittest_runner(verbosity=1+(verbose and 1 or 0)).run(test_suite)


	if profile:
		pr.disable()
		s = StringIO()
		ps = pstats.Stats(pr, stream=s).sort_stats('cumulative')
		ps.print_stats()
		print(s.getvalue())

	return out

def _add_test(app, path, filename, verbose, test_suite=None, ui_tests=False):
	import os

	if os.path.sep.join(["doctype", "doctype", "boilerplate"]) in path:
		# in /doctype/doctype/boilerplate/
		return

	app_path = frappe.get_pymodule_path(app)
	relative_path = os.path.relpath(path, app_path)
	if relative_path=='.':
		module_name = app
	else:
		module_name = '{app}.{relative_path}.{module_name}'.format(app=app,
			relative_path=relative_path.replace('/', '.'), module_name=filename[:-3])

	module = importlib.import_module(module_name)

	if hasattr(module, "test_dependencies"):
		for doctype in module.test_dependencies:
			make_test_records(doctype, verbose=verbose)

	is_ui_test = True if hasattr(module, 'TestDriver') else False

	if is_ui_test != ui_tests:
		return

	if not test_suite:
		test_suite = unittest.TestSuite()

	if os.path.basename(os.path.dirname(path))=="doctype":
		txt_file = os.path.join(path, filename[5:].replace(".py", ".json"))
		if os.path.exists(txt_file):
			with open(txt_file, 'r') as f:
				doc = json.loads(f.read())
			doctype = doc["name"]
			make_test_records(doctype, verbose)

	test_suite.addTest(unittest.TestLoader().loadTestsFromModule(module))

def make_test_records(doctype, verbose=0, force=False):
	if not frappe.db:
		frappe.connect()

	if frappe.flags.skip_test_records:
		return

	for options in get_dependencies(doctype):
		if options == "[Select]":
			continue

		if not options in frappe.local.test_objects:
			frappe.local.test_objects[options] = []
			make_test_records(options, verbose, force)
			make_test_records_for_doctype(options, verbose, force)

def get_modules(doctype):
	module = frappe.db.get_value("DocType", doctype, "module")
	try:
		test_module = load_doctype_module(doctype, module, "test_")
		if test_module:
			reload_module(test_module)
	except ImportError:
		test_module = None

	return module, test_module

def get_dependencies(doctype):
	module, test_module = get_modules(doctype)
	meta = frappe.get_meta(doctype)
	link_fields = meta.get_link_fields()

	for df in meta.get_table_fields():
		link_fields.extend(frappe.get_meta(df.options).get_link_fields())

	options_list = [df.options for df in link_fields] + [doctype]

	if hasattr(test_module, "test_dependencies"):
		options_list += test_module.test_dependencies

	options_list = list(set(options_list))

	if hasattr(test_module, "test_ignore"):
		for doctype_name in test_module.test_ignore:
			if doctype_name in options_list:
				options_list.remove(doctype_name)

	return options_list

def make_test_records_for_doctype(doctype, verbose=0, force=False):
	if not force and doctype in get_test_record_log():
		return

	module, test_module = get_modules(doctype)

	if verbose:
		print("Making for " + doctype)

	if hasattr(test_module, "_make_test_records"):
		frappe.local.test_objects[doctype] += test_module._make_test_records(verbose)

	elif hasattr(test_module, "test_records"):
		frappe.local.test_objects[doctype] += make_test_objects(doctype, test_module.test_records, verbose, force)

	else:
		test_records = frappe.get_test_records(doctype)
		if test_records:
			frappe.local.test_objects[doctype] += make_test_objects(doctype, test_records, verbose, force)

		elif verbose:
			print_mandatory_fields(doctype)

	add_to_test_record_log(doctype)

def make_test_objects(doctype, test_records=None, verbose=None, reset=False):
	'''Make test objects from given list of `test_records` or from `test_records.json`'''
	records = []

	def revert_naming(d):
		if getattr(d, 'naming_series', None):
			revert_series_if_last(d.naming_series, d.name)


	if test_records is None:
		test_records = frappe.get_test_records(doctype)

	for doc in test_records:
		if not doc.get("doctype"):
			doc["doctype"] = doctype

		d = frappe.copy_doc(doc)

		if d.meta.get_field("naming_series"):
			if not d.naming_series:
				d.naming_series = "_T-" + d.doctype + "-"

		if doc.get('name'):
			d.name = doc.get('name')
		else:
			d.set_new_name()

		if frappe.db.exists(d.doctype, d.name) and not reset:
			frappe.db.rollback()
			# do not create test records, if already exists
			continue

		# submit if docstatus is set to 1 for test record
		docstatus = d.docstatus

		d.docstatus = 0

		try:
			d.run_method("before_test_insert")
			d.insert()

			if docstatus == 1:
				d.submit()

		except frappe.NameError:
			revert_naming(d)

		except Exception as e:
			if d.flags.ignore_these_exceptions_in_test and e.__class__ in d.flags.ignore_these_exceptions_in_test:
				revert_naming(d)
			else:
				raise

		records.append(d.name)

		frappe.db.commit()
	return records

def print_mandatory_fields(doctype):
	print("Please setup make_test_records for: " + doctype)
	print("-" * 60)
	meta = frappe.get_meta(doctype)
	print("Autoname: " + (meta.autoname or ""))
	print("Mandatory Fields: ")
	for d in meta.get("fields", {"reqd":1}):
		print(d.parent + ":" + d.fieldname + " | " + d.fieldtype + " | " + (d.options or ""))
	print()

def add_to_test_record_log(doctype):
	'''Add `doctype` to site/.test_log
	`.test_log` is a cache of all doctypes for which test records are created'''
	test_record_log = get_test_record_log()
	if not doctype in test_record_log:
		frappe.flags.test_record_log.append(doctype)
		with open(frappe.get_site_path('.test_log'), 'w') as f:
			f.write('\n'.join(filter(None, frappe.flags.test_record_log)))

def get_test_record_log():
	'''Return the list of doctypes for which test records have been created'''
	if 'test_record_log' not in frappe.flags:
		if os.path.exists(frappe.get_site_path('.test_log')):
			with open(frappe.get_site_path('.test_log'), 'r') as f:
				frappe.flags.test_record_log = f.read().splitlines()
		else:
			frappe.flags.test_record_log = []

	return frappe.flags.test_record_log
