#
# Copyright (C) 2019-2022 Mathieu Parent <math.parent@gmail.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

from __future__ import annotations

from contextlib import contextmanager
from os.path import isfile
from typing import TYPE_CHECKING
from unittest import skipIf
from unittest.mock import call, patch

from vcr import __version__ as vcr_version

from gitlabracadabra.containers.blob import Blob
from gitlabracadabra.containers.const import DOCKER_HOSTNAME, DOCKER_MANIFEST_SCHEMA2, DOCKER_MANIFEST_SCHEMA2_LIST
from gitlabracadabra.containers.manifest import Manifest
from gitlabracadabra.containers.registry import Registry
from gitlabracadabra.containers.with_digest import WithDigest
from gitlabracadabra.tests import my_vcr
from gitlabracadabra.tests.case import TestCase

if TYPE_CHECKING:
    from collections.abc import Generator
    from logging import Logger


VERIFY_DIGEST_METHOD = "_verify_digest"
REGISTRY_IMPORTER_LOGGER = "gitlabracadabra.containers.registry_importer.logger"
REGISTRY_IMPORTER_MESSAGE = "%s%s %simported as %s:%s (%s, %s, %s)"
BLOBS2_0_0_MESSAGE = "2+0+0=2 uploaded+mounted+existing blobs"

DEBIAN_IMAGE = "library/debian"
BUSYBOX_IMAGE = "library/busybox"
BUSYBOX_IMAGE_FULL = "docker.io/library/busybox:latest@{0}"
LATEST = "latest"


class TestRegistry(TestCase):
    def destination_registry(self):
        registry = Registry("localhost:5000")
        registry._session.scheme = "http"
        return registry

    def assert_with_digest(self, registry, cacheable, digest, size, mime_type):
        assert isinstance(cacheable, WithDigest)
        assert cacheable.registry == registry
        assert cacheable.digest == digest
        assert cacheable.size == size
        assert cacheable.mime_type == mime_type

    def assert_manifest(self, registry, manifest, digest, size, mime_type):
        self.assert_with_digest(registry, manifest, digest, size, mime_type)
        assert isinstance(manifest, Manifest)
        assert isinstance(manifest.json, dict)
        assert isfile(manifest.cache_path)
        assert manifest.json["mediaType"] == mime_type
        assert manifest.json["schemaVersion"] == 2

    @contextmanager
    def mocked_objects(self) -> Generator[Logger, None, None]:
        with patch.object(WithDigest, VERIFY_DIGEST_METHOD) as verify_digest_mock:
            verify_digest_mock.return_value = None
            with patch(REGISTRY_IMPORTER_LOGGER, autospec=True) as logger:
                yield logger

    @my_vcr.use_cassette
    def test_manifest(self, cass):
        digest = "sha256:102ab2db1ad671545c0ace25463c4e3c45f9b15e319d3a00a1b2b085293c27fb"
        registry = Registry(DOCKER_HOSTNAME)
        manifest = registry.manifest(DEBIAN_IMAGE, digest)
        self.assert_manifest(
            registry,
            manifest,
            digest,
            529,
            DOCKER_MANIFEST_SCHEMA2,
        )
        assert isinstance(manifest.json["config"], dict)
        assert isinstance(manifest.json["layers"], list)
        assert cass.all_played

    @my_vcr.use_cassette
    def test_manifest_list(self, cass):
        registry = Registry(DOCKER_HOSTNAME)
        manifest_list = registry.manifest(DEBIAN_IMAGE)
        self.assert_manifest(
            registry,
            manifest_list,
            "sha256:1092695e843ad975267131f27a2b523128c4e03d2d96574bbdd7cf949ed51475",
            1854,
            DOCKER_MANIFEST_SCHEMA2_LIST,
        )
        assert isinstance(manifest_list.json["manifests"], list)

        manifests = manifest_list.manifests()
        assert isinstance(manifests, list)
        first = manifests[0]
        assert not isfile(first.cache_path)
        self.assert_manifest(
            registry,
            first,
            "sha256:102ab2db1ad671545c0ace25463c4e3c45f9b15e319d3a00a1b2b085293c27fb",
            529,
            DOCKER_MANIFEST_SCHEMA2,
        )
        assert isinstance(first, Manifest)
        assert first.platform == {"architecture": "amd64", "os": "linux"}
        assert cass.all_played

    @my_vcr.use_cassette
    def test_blob(self, cass):
        manifest_name = DEBIAN_IMAGE
        digest = "sha256:5890f8ba95f680c87fcf89e51190098641b4f646102ce7ca906e7f83c84874dc"
        registry = Registry(DOCKER_HOSTNAME)
        blob = registry.blob(manifest_name, digest)
        assert isinstance(blob, Blob)
        assert blob.registry == registry
        assert blob.manifest_name == manifest_name
        assert blob.digest == digest
        assert not isfile(blob.cache_path)
        assert blob.size == 1459
        assert not isfile(blob.cache_path)
        assert cass.all_played

    @skipIf(vcr_version == "6.0.1", "vcrpy without iterator support https://github.com/kevin1024/vcrpy/pull/851")
    @my_vcr.use_cassette
    def test_import_manifest(self, cass):
        digest = "sha256:74e4a68dfba6f40b01787a3876cc1be0fb1d9025c3567cf8367c659f2187234f"
        registry = Registry(DOCKER_HOSTNAME)
        registry2 = self.destination_registry()
        manifest = Manifest(
            registry,
            BUSYBOX_IMAGE,
            digest,
        )
        with self.mocked_objects() as logger:
            registry2.import_manifest(manifest)
            logger.info.assert_has_calls(
                [
                    call(
                        REGISTRY_IMPORTER_MESSAGE,
                        "",
                        BUSYBOX_IMAGE_FULL.format(digest),
                        "",
                        BUSYBOX_IMAGE,
                        LATEST,
                        "1+0=1 uploaded+existing manifests",
                        BLOBS2_0_0_MESSAGE,
                        "766112+0+0=766112 uploaded+mounted+existing blobs size",
                    )
                ]
            )
        assert cass.all_played

    @my_vcr.use_cassette
    def test_import_manifest_already_exists(self, cass):
        digest = "sha256:74e4a68dfba6f40b01787a3876cc1be0fb1d9025c3567cf8367c659f2187234f"
        registry = Registry(DOCKER_HOSTNAME)
        registry2 = self.destination_registry()
        manifest = Manifest(
            registry,
            BUSYBOX_IMAGE,
            digest,
        )
        with self.mocked_objects() as logger:
            registry2.import_manifest(manifest)
            logger.info.assert_has_calls([])
        assert cass.all_played

    @skipIf(vcr_version == "6.0.1", "vcrpy without iterator support https://github.com/kevin1024/vcrpy/pull/851")
    @my_vcr.use_cassette
    def test_import_manifest_list(self, cass):
        digest = "sha256:c6b45a95f932202dbb27c31333c4789f45184a744060f6e569cc9d2bf1b9ad6f"
        registry = Registry(DOCKER_HOSTNAME)
        registry2 = self.destination_registry()
        manifest = Manifest(
            registry,
            BUSYBOX_IMAGE,
            tag=LATEST,
        )
        with self.mocked_objects() as logger:
            registry2.import_manifest(manifest)
            logger.info.assert_has_calls(
                [
                    call(
                        REGISTRY_IMPORTER_MESSAGE,
                        "",
                        BUSYBOX_IMAGE_FULL.format(digest),
                        "",
                        BUSYBOX_IMAGE,
                        LATEST,
                        "1+0=1 uploaded+existing manifests",
                        BLOBS2_0_0_MESSAGE,
                        "766112+0+0=766112 uploaded+mounted+existing blobs size",
                    )
                ]
            )
        assert cass.all_played

    @my_vcr.use_cassette
    def test_import_manifest_list_dry_run(self, cass):
        digest = "sha256:c6b45a95f932202dbb27c31333c4789f45184a744060f6e569cc9d2bf1b9ad6f"
        registry = Registry(DOCKER_HOSTNAME)
        registry2 = self.destination_registry()
        manifest = Manifest(
            registry,
            BUSYBOX_IMAGE,
            tag=LATEST,
        )
        with self.mocked_objects() as logger:
            registry2.import_manifest(manifest, dry_run=True)
            logger.info.assert_has_calls(
                [
                    call(
                        REGISTRY_IMPORTER_MESSAGE,
                        "",
                        BUSYBOX_IMAGE_FULL.format(digest),
                        "NOT ",
                        BUSYBOX_IMAGE,
                        LATEST,
                        "1+0=1 uploaded+existing manifests",
                        BLOBS2_0_0_MESSAGE,
                        "766112+0+0=766112 uploaded+mounted+existing blobs size",
                    )
                ]
            )
        assert cass.all_played

    @skipIf(vcr_version == "6.0.1", "vcrpy without iterator support https://github.com/kevin1024/vcrpy/pull/851")
    @my_vcr.use_cassette
    def test_import_manifest_list_all(self, cass):
        digest = "sha256:c6b45a95f932202dbb27c31333c4789f45184a744060f6e569cc9d2bf1b9ad6f"
        registry = Registry(DOCKER_HOSTNAME)
        registry2 = self.destination_registry()
        manifest = Manifest(
            registry,
            BUSYBOX_IMAGE,
            tag=LATEST,
        )
        with self.mocked_objects() as logger:
            registry2.import_manifest(manifest, "newname", "newtag", platform="all")
            logger.info.assert_has_calls(
                [
                    call(
                        REGISTRY_IMPORTER_MESSAGE,
                        "",
                        BUSYBOX_IMAGE_FULL.format(digest),
                        "",
                        "newname",
                        "newtag",
                        "2+8=10 uploaded+existing manifests",
                        BLOBS2_0_0_MESSAGE,
                        "2140766+0+0=2140766 uploaded+mounted+existing blobs size",
                    )
                ]
            )
        assert cass.all_played

    @my_vcr.use_cassette
    def test_import_manifest_not_found(self, cass):
        registry = Registry(DOCKER_HOSTNAME)
        registry2 = self.destination_registry()
        manifest = Manifest(
            registry,
            BUSYBOX_IMAGE,
            tag="not_found",
        )
        url = "https://registry-1.docker.io/v2/library/busybox/manifests/not_found"
        with self.mocked_objects() as logger:
            registry2.import_manifest(manifest)
            logger.warning.assert_has_calls(
                [
                    call(
                        "%s%s NOT imported as %s:%s: %s",
                        "",
                        "docker.io/library/busybox:not_found",
                        "library/busybox",
                        "not_found",
                        f"404 Client Error: Not Found for url: {url}",
                    )
                ]
            )
        assert cass.all_played
