import git
import pytest

import repo_cloner.lib.cloner
from repo_cloner.lib import gen_repo_hashed_name, DirNotFoundError, Cloner
from cloner_test_fixtures import *
from pathlib import Path
import logging
from unittest.mock import patch, PropertyMock, MagicMock, call

some_commits = [
	"d766d9c302463257695a4d53d857a2cecd024414",
	"a2e308bb9c5e59e7a0c319dca0adf3966f3f3a60",
	"36021088abb6ebcb2202897f3f27b26b21c25068",
	"e811211f0895e9e792f569b1b38f8452e0efe42f",
	"6854c793fd2cbd848650a94b9fed4924e5e428b2",
	"2f08263b5aff30ce776bb0350503be69d45647da",
	"fc53c9d8bc9e01c63632376df51abb67ca344a89",
	"c95a862af3d13623da3d7a6b73ff79d68ff2d7ad",
	"b21c1e9e329bcdef1980462cf62c09a9e807dafd",
	"dec7ff27d658412f0088c4c3220990f1f1dc98f1",
	"ad66f820c9dfa06c3767f81cb42b1398fa61ff05",
	"b9af12b9f80b372c645b5f64c5a8f8b6a148ccfc",
	"1fda6025ed303ecf03b9afa7cce882aaddc058f9",
	"d33585f0a72d9de6c481891787e4d956b769ccb5",
	"7f685afca71731cb9276f937fc8cceca6b47b1f2",
	"af112317aa2459e88db9cb10533ea6f29818afee",
	"ddc24a34983ff43b61e1bdf27b7ec2357932e7e0",
	"7ccca22ba367433eedb226310373fd250a2af725",
	"e4843c6d2391d0b45beea81e0dd34078484b474f",
	"fe942d46c33fee0e68d2e0ed64dfa6515dbf89c4",
	"1d80638229e0a7ef62b3b9cdab9ad9f63acf6d38",
	"f968ea00a3007034ddf196285d7b60fec5e7fcf0",
	"490859dbebe02af6bd643a89b6897961674f90fd",
	"066de679c906a78f7f817ee9a48d3021fd8b6b7c",
	"2a8277687fb6dee742e6e0193ea95fcd2264fbc4",
	"8808c649a8b0a5279a2d9a46b730254cad649205",
	"ad5db175fab144a8851b712195733c4a9c00d699",
	"36d45a4c1e5ad8c47a14881c5427045c3de095d0",
	"6b0b9affedb3e3daa4df00cd54678d78ea1c1d94",
	"aa5056610ff57f73bae9633a985c6a8e41f3bc23",
]


def mock_time() -> float:
	return 1658702099.4258687


class MockConfig:
	def __init__(self):
		self.cloner_repo_url = ""
		self.cloner_project_name = "Mocked Project"
		self.cloner_interval = 0
		self.cloner_submodules = False
		self.cloner_submodule_depth = 100


class MockDirStruct:
	raise_cache_exists = False

	def __init__(self, tmp: Path):
		self.config = MockConfig()
		self.cache_dir = tmp.joinpath("cache")
		self.conf_dir = tmp.joinpath("config")
		self.repos_dir = tmp.joinpath("repos")
		self.raise_cache_exists = False

	@property
	def cache_dir_exists(self):
		if self.raise_cache_exists:
			raise DirNotFoundError("mock_dir")
		return True


class MockRepoTool:
	path = None
	initialized = False

	def __init__(self, path: str):
		self.path = path
		self.initialized = False


def test_init_invalid_config(tmp_path, caplog):
	caplog.set_level(logging.INFO)
	mock = MockDirStruct(tmp_path)
	with pytest.raises(KeyError) as e:
		Cloner(mock)
	assert "KeyError: 'cloner_repo_url not defined in config!'" == e.exconly()
	assert "CRITICAL root:cloner.py:" in caplog.text
	assert "Undefined repo cloner URL in config!\n" in caplog.text

	# valid config
	caplog.clear()
	# set mocks
	mock.config.cloner_repo_url = "git@mocked:/path"
	cache_dir = tmp_path.joinpath("cache")
	# validate dir does not exist
	assert not cache_dir.exists()
	# set mock to raise error
	mock.raise_cache_exists = True
	# create new cloner class
	Cloner(mock)
	# dir should exist now
	assert cache_dir.exists()
	assert "Cache dir for project Mocked Project not found -> creating" in caplog.text


def test_init_create_dirs(cloner_dir_with_config):
	dirs = MockDirStruct(cloner_dir_with_config)
	dirs.config.cloner_repo_url = "https://repo"
	Cloner(dirs)
	assert cloner_dir_with_config.joinpath("cache", "submodules").exists()


def test_check_interval(cloner_dir_struct: Path, monkeypatch):
	mock = MockDirStruct(cloner_dir_struct)
	mock.config.cloner_repo_url = "git@mocked:/path"
	timestamp_file = cloner_dir_struct.joinpath("cache", "last-check-time")

	with monkeypatch.context() as m:
		m.setattr("repo_cloner.lib.cloner.time", mock_time)
		cloner = Cloner(mock)
		# no timestamp file exists -> timer has to run
		assert cloner.check_interval()

		# timestamp file in future -> no run
		timestamp_file.touch()
		timestamp_file.write_text(str(int(mock_time() + 1)))
		assert not cloner.check_interval()

		# timestamp in history, but run everytime is set >> RUN
		timestamp_file.write_text(str(int(mock_time() - 1)))
		assert cloner.check_interval()

		# second ago, but with 5 minute interval
		mock.config.cloner_interval = 5
		assert not cloner.check_interval()

		# 6 minutes ago, with 5 min interval -> run!
		timestamp_file.write_text(str(int(mock_time() - 360)))
		assert cloner.check_interval()

		# corrupted file
		timestamp_file.write_text("1234WTF")
		assert cloner.check_interval()


def test__opened(cloner_dir_with_config, monkeypatch):
	ds = MockDirStruct(cloner_dir_with_config)
	ds.config.cloner_repo_url = cloner_dir_with_config.as_uri()
	c = Cloner(ds)
	# no repo defined
	assert not c._Cloner__opened
	# with mocked repo
	monkeypatch.setattr(c, "_repo", MockRepoTool(cloner_dir_with_config.as_posix()))
	c._repo.initialized = True
	assert c._Cloner__opened
	c._repo.initialized = False
	assert not c._Cloner__opened


def test_repo_path_by_url(cloner_dir_struct: Path, path_repo_base: Path):
	ds = MockDirStruct(cloner_dir_struct)
	ds.config.cloner_repo_url = path_repo_base.as_uri()
	c = Cloner(ds)
	x = c._repo_path_by_url("git@server:namespace/repo.git")
	assert x == ds.repos_dir.joinpath("namespace_repo_3375634822.git").as_posix()


def test__main_repo_path(cloner_dir_struct: Path, path_repo_base: Path):
	ds = MockDirStruct(cloner_dir_struct)
	ds.config.cloner_repo_url = path_repo_base.as_uri()
	hashed = gen_repo_hashed_name(path_repo_base.as_uri())
	c = Cloner(ds)
	x = c._Cloner__main_repo_path
	assert x == ds.repos_dir.joinpath(hashed).as_posix()


def test_check_submodules_repo(tmp_path):
	from collections import namedtuple
	from repo_cloner.lib import DiskStoredList

	def submodule_scanner_mock(commit = None):
		if commit.hexsha in ["f968ea00a3007034ddf196285d7b60fec5e7fcf0", "36d45a4c1e5ad8c47a14881c5427045c3de095d0"]:
			return ["https://git.hosting:namespace/repo2.git"]
		if commit.hexsha in ["6b0b9affedb3e3daa4df00cd54678d78ea1c1d94", "aa5056610ff57f73bae9633a985c6a8e41f3bc23"]:
			return ["https://git.hosting:namespace/repo2.git", "https://git.hosting:namespace/repo3.git"]
		return False

	repo_path = tmp_path.joinpath("repo.git").as_posix()
	cache_path = tmp_path.joinpath("cache.list")

	submodule_cache = tmp_path.joinpath("submodules").as_posix()
	submodules = DiskStoredList(submodule_cache)
	submodules.append("https://git.hosting:namespace/repo1.git")

	Commit = namedtuple("Commit", ["hexsha"])
	# 30 commits
	mocked_commits = [Commit(commit) for commit in some_commits]

	# write cache file with collected commits
	with open(cache_path.as_posix(), "w") as f:
		f.writelines([f"{commit}\n" for commit in some_commits[0:20]])

	mocks = {
		'initialized':     PropertyMock(return_value = True),
		"path":            PropertyMock(return_value = repo_path),
		"list_commits":    MagicMock(return_value = mocked_commits),
		"list_submodules": MagicMock(side_effect = submodule_scanner_mock),
	}

	# prepare mocks for RepoTool
	with patch.multiple("repo_cloner.lib.repo_tool.RepoTool", **mocks):
		import repo_cloner.lib.repo_tool
		rt = repo_cloner.lib.repo_tool.RepoTool(tmp_path.as_posix())

		Cloner.check_submodules_repo(rt, cache_path.as_posix(), submodules, 100)

		assert rt.list_commits.call_args == call(100)
		assert rt.list_submodules.call_count == 10

		returned_submodules = [x for x in submodules]
		assert returned_submodules == [
			'https://git.hosting:namespace/repo1.git', 'https://git.hosting:namespace/repo2.git',
			'https://git.hosting:namespace/repo3.git'
		]


def test_sync(cloner_dir_struct, tmp_path, monkeypatch):
	called: bool = False

	def fetch():
		nonlocal called
		called = True
		return True

	class PatchCloner(Cloner):
		open = False

		@property
		def __opened(self) -> bool:
			return self.open

	ds = MockDirStruct(cloner_dir_struct)
	ds.config.cloner_repo_url = "file://wut!"
	repo = tmp_path.joinpath("repo.git")
	c = PatchCloner(ds)
	# invalid repo, closed
	c.open = False
	assert not c.sync()
	assert not called
	# mocked valid repo, opened
	c._repo = MockRepoTool(repo.as_posix())
	c._repo.initialized = True
	c._repo.fetch = fetch
	assert c.sync()
	assert called

	called = False
	# mocked repo, invalid, closed
	c._repo.initialized = False
	assert not called
	assert not c.sync()


def test_sync_submodules_failed(cloner_dir_with_config, caplog):
	ds = MockDirStruct(cloner_dir_with_config)
	# mock config for submodules
	ds.config.cloner_submodules = True
	ds.config.cloner_repo_url = "asdhlk"

	# mock repo_tool.fetch to return false
	mocks = {
		'initialized': PropertyMock(return_value = True),
		'fetch':       MagicMock(return_value = False)
	}

	with patch.multiple("repo_cloner.lib.cloner.RepoTool", **mocks) as mock:
		cl = Cloner(ds)
		assert not cl.sync()

	assert caplog.records[1].levelname == "CRITICAL"
	assert caplog.records[1].message == "Repo fetch failed for Mocked Project"


def my_check_submodules_repo(
		repo_tool, cache_file: str,
		submodule_list: list,
		scan_depth = None):
	if "namespace_whatever_" in cache_file:
		submodule_list.append("https://git.hosting:namespace/submodule1.git")
		submodule_list.append("https://git.hosting:namespace/submodule2.git")
	if "/namespace_submodule1_" in cache_file:
		submodule_list.append("https://git.hosting:namespace/submodule3.git")
	return submodule_list


def test_submodules_sync_succeed(cloner_dir_with_config, caplog):
	cloner_dir_with_config.joinpath("cache", "submodules").mkdir(parents = True)
	cloner_dir_with_config.joinpath("cache", "submodules", "submodules.cache") \
		.write_text("https://git.hosting:previous/submodule.git")
	ds = MockDirStruct(cloner_dir_with_config)
	ds.config.cloner_repo_url = "https://git.hosting:namespace/whatever.git"
	ds.config.cloner_submodules = True

	# mock almost everything
	mocks = {
		'initialized':      PropertyMock(side_effect = [True, False, True, True, True]),
		'fetch':            MagicMock(return_value = True),
		'clone':            MagicMock(return_value = True),
		'repo_fingerprint': PropertyMock(side_effect = ["fp1", "fp2", "fp3"]),
	}

	with patch.multiple("repo_cloner.lib.cloner.RepoTool", **mocks):
		Cloner.check_submodules_repo = my_check_submodules_repo
		cl = Cloner(ds)
		assert cl.sync()

		assert repo_cloner.lib.cloner.RepoTool.fetch.call_count == 4
		assert repo_cloner.lib.cloner.RepoTool.clone.call_count == 1


def test_submodules_sync_unchanged_main_repo(cloner_dir_with_config, caplog):
	caplog.set_level(0)
	cloner_dir_with_config.joinpath("cache", "submodules").mkdir(parents = True)
	cloner_dir_with_config.joinpath("cache", "submodules", "submodules.cache") \
		.write_text("https://git.hosting:previous/submodule.git")
	ds = MockDirStruct(cloner_dir_with_config)
	ds.config.cloner_repo_url = "https://git.hosting:namespace/whatever.git"
	ds.config.cloner_submodules = True

	# mock almost everything
	mocks = {
		'initialized':      PropertyMock(side_effect = [True, False, True, True, True]),
		'fetch':            MagicMock(return_value = True),
		'clone':            MagicMock(return_value = True),
		# fingerprint is same for both queries, so nothing is fetched/synced afterwards
		'repo_fingerprint': PropertyMock(return_value = "fp1"),
	}

	with patch.multiple("repo_cloner.lib.cloner.RepoTool", **mocks):
		Cloner.check_submodules_repo = my_check_submodules_repo
		cl = Cloner(ds)
		assert cl.sync()

		assert repo_cloner.lib.cloner.RepoTool.fetch.call_count == 1
		assert repo_cloner.lib.cloner.RepoTool.clone.call_count == 0


def test_submodules_sync_one_fail(cloner_dir_with_config, caplog):
	cloner_dir_with_config.joinpath("cache", "submodules").mkdir(parents = True)
	cloner_dir_with_config.joinpath("cache", "submodules", "submodules.cache") \
		.write_text("https://git.hosting:previous/submodule.git")
	ds = MockDirStruct(cloner_dir_with_config)
	ds.config.cloner_repo_url = "https://git.hosting:namespace/whatever.git"
	ds.config.cloner_submodules = True
	# just to make coverage nicer
	ds.config.cloner_submodule_depth = 0

	# mock almost everything
	mocks = {
		'initialized':      PropertyMock(return_value = True),
		'fetch':            MagicMock(side_effect = [True, True, True, False, True]),
		'clone':            MagicMock(return_value = True),
		'repo_fingerprint': PropertyMock(side_effect = ["fp1", "fp2", "fp3"]),
	}

	with patch.multiple("repo_cloner.lib.cloner.RepoTool", **mocks):
		Cloner.check_submodules_repo = my_check_submodules_repo
		cl = Cloner(ds)
		assert not cl.sync()

		assert repo_cloner.lib.cloner.RepoTool.fetch.call_count == 5
		assert repo_cloner.lib.cloner.RepoTool.clone.call_count == 0

	assert "Clone/fetch of submodule: https://git.hosting:namespace/submodule2.git failed" in caplog.text


def test_perform_check(cloner_dir_with_config, monkeypatch, caplog):
	call_counter: int = 0

	def ret_true():
		return True

	def ret_false():
		return False

	def call_counter_inc():
		nonlocal call_counter
		call_counter += 1

	# set logger
	caplog.set_level(logging.INFO)

	mock = MockDirStruct(cloner_dir_with_config)
	mock.config.cloner_repo_url = "git://repo"
	cloner = Cloner(mock)
	# timer did not pass
	monkeypatch.setattr(cloner, "check_interval", ret_false)
	monkeypatch.setattr(cloner, "sync", call_counter_inc)
	assert call_counter == 0
	cloner.perform_check()
	assert call_counter == 0
	# timer passed
	monkeypatch.setattr(cloner, "check_interval", ret_true)
	cloner.perform_check()
	assert call_counter == 1
	# right logs
	assert 2 == sum(
		r.message == "Started check for Mocked Project, url: git://repo"
		and r.levelname == "INFO"
		for r in caplog.records
	)
	assert 2 == sum(
		r.message == "Check finished"
		and r.levelname == "INFO"
		for r in caplog.records
	)


def test_open_uninitialized(cloner_dir_with_config, path_repo_base):
	url = path_repo_base.as_uri()
	mock = MockDirStruct(cloner_dir_with_config)
	mock.config.cloner_repo_url = path_repo_base.as_uri()
	c = Cloner(mock)
	assert not c.open(mock.config.cloner_repo_url)
	assert c._repo_url == path_repo_base.as_uri()


def test_open_initialized(cloner_dir_with_config, path_repo_base, caplog):
	mock = MockDirStruct(cloner_dir_with_config)
	hashed = gen_repo_hashed_name(path_repo_base.as_uri())
	path = cloner_dir_with_config.joinpath("repos", hashed).as_posix()
	mock.config.cloner_repo_url = path_repo_base.as_uri()
	r = git.Repo().clone_from(path_repo_base.as_uri(), path, bare = True)
	commit = r.head.commit.hexsha
	assert r.bare
	c = Cloner(mock)
	assert c.open(path_repo_base.as_uri())
	assert c._repo._repo.head.commit.hexsha == commit


def test_clone(tmp_path, path_repo_base):
	mock = MockDirStruct(tmp_path)
	mock.config.cloner_repo_url = "invalid"
	c = Cloner(mock)
	assert c.clone(path_repo_base.as_uri())
	assert "e0c7e2a72579e24657c05e875201011d2b48bf94" == c._repo._repo.head.commit.hexsha


def test_clone_initialized(tmp_path, path_repo_base, caplog):
	mock = MockDirStruct(tmp_path)
	hashed = gen_repo_hashed_name(path_repo_base.as_uri())
	path = tmp_path.joinpath("repos", hashed).as_posix()
	mock.config.cloner_repo_url = path_repo_base.as_uri()
	git.Repo().init(path)
	c = Cloner(mock)
	assert not c.clone(path_repo_base.as_uri())
	assert caplog.records[0].levelname == "CRITICAL"
	assert caplog.records[0].message == f"Repo path {path} is initialized... Refusing clone!"


def test_clone_recursive(tmp_path, path_repo_base, caplog):
	mock = MockDirStruct(tmp_path)
	mock.config.cloner_repo_url = "https://repo"
	mock.config.cloner_submodules = True
	Path(mock.repos_dir).mkdir()

	with patch(
			"repo_cloner.lib.cloner.RepoTool.initialized",
			new_callable = PropertyMock,
			return_value = False) as patch_initialized, \
			patch(
				"repo_cloner.lib.cloner.RepoTool.clone_recursive",
				return_value = True) as patch_clone_recursive:
		cloner = Cloner(mock)
		assert cloner.clone()

		assert patch_initialized.call_count == 1
		assert patch_clone_recursive.call_count == 1
		patch_clone_recursive.assert_called_with(
			'https://repo', tmp_path.joinpath('cache', 'submodules').as_posix(), scan_depth = 100)

		mock.config.cloner_submodule_depth = 0
		assert cloner.clone()
		patch_clone_recursive.assert_called_with(
			'https://repo', tmp_path.joinpath('cache', 'submodules').as_posix(), scan_depth = None)


def test_detector_enabled(cloner_dir_with_config):
	ds = MockDirStruct(cloner_dir_with_config)
	ds.config.cloner_repo_url = "http://mock"
	cl = Cloner(ds)
	assert not cl.detector_enabled
	Path(cloner_dir_with_config).joinpath("config", "detector.cfg").touch()
	assert cl.detector_enabled