"""
.. author:: Eric Torres

Tests for the rbackup.struct.repository module.
"""
import re
import unittest
from unittest.mock import PropertyMock, patch

from hypothesis import given
from hypothesis.strategies import from_regex, lists, text

from rbackup.struct.repository import Repository
from rbackup.struct.snapshot import Snapshot

# ========== Constants  ==========
TESTING_PACKAGE = "rbackup.struct"
REPO_MODULE = f"{TESTING_PACKAGE}.repository"
SS_MODULE = f"{TESTING_PACKAGE}.snapshot"

VALID_SNAPSHOT_NAME = r"[\w._+-]+[^/]*"


# ========== Integration Tests ==========
class TestRepositoryPreCreate(unittest.TestCase):
    """Test properties of the Repository before running create_snapshot().

    Mocked Modules/Classes
    ----------------------
    rbackup.struct.repository.Snapshot

    Mocked Attributes
    -----------------
    * Repository.metadata_path
    * Repository.read_metadata
    * Repository.write_metadata
    """

    def setUp(self):
        self.patched_path = patch.object(
            Repository, "metadata_path", new_callable=PropertyMock
        )
        self.patched_r_metadata = patch.object(
            Repository, "read_metadata", spec_set=list
        )
        self.patched_w_metadata = patch.object(
            Repository, "write_metadata", spec_set=list
        )
        self.patched_snapshot = patch(
            f"{TESTING_PACKAGE}.repository.Snapshot", spec_set=Snapshot
        )

        self.mocked_r_metadata = self.patched_r_metadata.start()
        self.mocked_w_metadata = self.patched_w_metadata.start()
        self.mocked_path = self.patched_path.start()
        self.mocked_snapshot = self.patched_snapshot.start()

        self.mocked_path.return_value.exists.return_value = True

    @given(lists(from_regex(VALID_SNAPSHOT_NAME, fullmatch=True), unique=True))
    def test_empty(self, snapshots):
        self.mocked_r_metadata.return_value = snapshots.copy()
        repo = Repository("backup")

        if not snapshots:
            self.assertTrue(repo.empty)
        else:
            self.assertFalse(repo.empty)

    @given(
        lists(
            text(
                alphabet=characters(blacklist_characters=UNWANTED_SNAPSHOT_CHARS),
                min_size=1,
            ),
            unique=True,
        )
    )
    def test_len(self, snapshots):
        self.mocked_r_metadata.return_value = snapshots.copy()
        repo = Repository("backup")

        self.assertEqual(len(repo.snapshots), len(snapshots))

    @given(text(min_size=1))
    def test_contains(self, name):
        self.mocked_r_metadata = []
        repo = Repository("backup")

        self.assertFalse(name in repo)

    @given(text())
    def test_valid_name(self, name):
        self.mocked_r_metadata.return_value = []

        if not re.match(VALID_SNAPSHOT_NAME, name):
            self.assertFalse(Repository.is_valid_snapshot_name(name))
        else:
            self.assertTrue(Repository.is_valid_snapshot_name(name))

    def test_snapshots_returns_empty_list(self):
        r = Repository("backup")
        self.assertListEqual(r.snapshots, [])

    def tearDown(self):
        self.patched_path.stop()
        self.patched_r_metadata.stop()
        self.patched_w_metadata.stop()
        self.patched_snapshot.stop()


class TestRepositoryPostCreate(unittest.TestCase):
    """Test properties of the Repository after running create_snapshot().

    Mocked Modules/Classes
    ----------------------
    rbackup.struct.repository.Snapshot

    Mocked Attributes
    -----------------
    * Repository.metadata_path
    * Repository.read_metadata
    * Repository.write_metadata
    """

    def setUp(self):
        self.patched_path = patch.object(
            Repository, "metadata_path", new_callable=PropertyMock
        )
        self.patched_r_metadata = patch.object(
            Repository, "read_metadata", spec_set=list
        )
        self.patched_w_metadata = patch.object(
            Repository, "write_metadata", spec_set=list
        )
        self.patched_snapshot = patch(
            f"{TESTING_PACKAGE}.repository.Snapshot", spec_set=Snapshot
        )

        self.mocked_path = self.patched_path.start()
        self.mocked_r_metadata = self.patched_r_metadata.start()
        self.mocked_w_metadata = self.patched_w_metadata.start()
        self.mocked_snapshot = self.patched_snapshot.start()

    @given(lists(from_regex(VALID_SNAPSHOT_NAME, fullmatch=True), unique=True))
    def test_dunder_len(self, snapshots):
        self.mocked_r_metadata.return_value = snapshots.copy()
        repo = Repository("backup")

        repo.create_snapshot()

        self.assertFalse(repo.empty)

    @given(from_regex(VALID_SNAPSHOT_NAME, fullmatch=True))
    def test_dunder_contains(self, name):
        self.mocked_path.return_value.exists.return_value = False
        repo = Repository("backup")

        repo.create_snapshot(name)
        self.assertTrue(name in repo)

    def test_empty(self):
        self.mocked_r_metadata.return_value = []
        repo = Repository("backup")

        repo.create_snapshot()

        self.assertEqual(len(repo), len(snapshots) + 1)
        self.assertEqual(len(repo.snapshots), len(snapshots) + 1)

    @given(
        text(
            alphabet=characters(blacklist_characters=UNWANTED_SNAPSHOT_CHARS),
            min_size=1,
        )
    )
    def test_contains(self, name):
        self.mocked_path.return_value.exists.return_value = False
        repo = Repository("backup")

        repo.create_snapshot(name)
        self.assertTrue(name in repo)

    def tearDown(self):
        self.patched_path.stop()
        self.patched_r_metadata.stop()
        self.patched_w_metadata.stop()
        self.patched_snapshot.stop()