# Copyright 2019 The ChromiumOS Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

"""Unit tests for replication_lib."""

import json
import os
import stat

from chromite.third_party.google.protobuf.field_mask_pb2 import FieldMask

from chromite.api.gen.config import replication_config_pb2
from chromite.lib import constants
from chromite.lib import cros_test_lib
from chromite.lib import replication_lib


D = cros_test_lib.Directory
FILE_TYPE_JSON = replication_config_pb2.FILE_TYPE_JSON
FILE_TYPE_OTHER = replication_config_pb2.FILE_TYPE_OTHER
FileReplicationRule = replication_config_pb2.FileReplicationRule
REPLICATION_TYPE_COPY = replication_config_pb2.REPLICATION_TYPE_COPY
REPLICATION_TYPE_FILTER = replication_config_pb2.REPLICATION_TYPE_FILTER
ReplicationConfig = replication_config_pb2.ReplicationConfig
StringReplacementRule = replication_config_pb2.StringReplacementRule


class ReplicateTest(cros_test_lib.MockTempDirTestCase):
    """Tests of the Replicate method."""

    def setUp(self):
        file_layout = (
            D("src", ["build_config.json", "audio_file", "firmware.bin"]),
        )
        cros_test_lib.CreateOnDiskHierarchy(self.tempdir, file_layout)

        self.build_config_path = os.path.join("src", "build_config.json")
        self.audio_path = os.path.join("src", "audio_file")
        self.firmware_path = os.path.join("src", "firmware.bin")

        build_config = {
            "chromeos": {
                "configs": [
                    {
                        "name": "A",
                        "field1": 1,
                        "field2": 2,
                    },
                    {
                        "name": "B",
                        "field1": 3,
                        "field2": 4,
                    },
                ]
            }
        }

        self.WriteTempFile(self.build_config_path, json.dumps(build_config))
        self.WriteTempFile(self.audio_path, "[Speaker A Settings]")
        self.WriteTempFile(self.firmware_path, bytes(123), mode="wb")

        self.PatchObject(constants, "SOURCE_ROOT", new=self.tempdir)

    def testReplicate(self):
        """Test basic Replication functionality.

        - destination_fields used to filter JSON payload.
        - firmware.bin not copied.
        """
        build_config_dst_path = os.path.join("dst", "build_config.json")
        audio_dst_path = os.path.join("dst", "audio_file")

        replication_config = ReplicationConfig(
            file_replication_rules=[
                FileReplicationRule(
                    source_path=self.build_config_path,
                    destination_path=build_config_dst_path,
                    file_type=FILE_TYPE_JSON,
                    replication_type=REPLICATION_TYPE_FILTER,
                    destination_fields=FieldMask(paths=["name", "field2"]),
                ),
                FileReplicationRule(
                    source_path=self.audio_path,
                    destination_path=audio_dst_path,
                    file_type=FILE_TYPE_OTHER,
                    replication_type=REPLICATION_TYPE_COPY,
                ),
            ]
        )

        replication_lib.Replicate(replication_config)

        expected_file_layout = (
            D("src", ["build_config.json", "audio_file", "firmware.bin"]),
            D("dst", ["build_config.json", "audio_file"]),
        )

        cros_test_lib.VerifyOnDiskHierarchy(self.tempdir, expected_file_layout)

        build_config_dst = json.loads(self.ReadTempFile(build_config_dst_path))
        expected_build_config_dst = {
            "chromeos": {
                "configs": [
                    {
                        "name": "A",
                        "field2": 2,
                    },
                    {
                        "name": "B",
                        "field2": 4,
                    },
                ]
            }
        }
        self.assertDictEqual(expected_build_config_dst, build_config_dst)

        self.assertTempFileContents(audio_dst_path, "[Speaker A Settings]")

    def testReplicateDestinationExists(self):
        """Test existing files are overwritten."""
        file_layout = (D("dst", ["audio_file"]),)
        cros_test_lib.CreateOnDiskHierarchy(self.tempdir, file_layout)

        audio_dst_path = os.path.join("dst", "audio_file")
        self.WriteTempFile(audio_dst_path, "Original audio data")

        replication_config = ReplicationConfig(
            file_replication_rules=[
                FileReplicationRule(
                    source_path=self.audio_path,
                    destination_path=audio_dst_path,
                    file_type=FILE_TYPE_OTHER,
                    replication_type=REPLICATION_TYPE_COPY,
                ),
            ]
        )

        replication_lib.Replicate(replication_config)

        expected_file_layout = (
            D("src", ["build_config.json", "audio_file", "firmware.bin"]),
            D("dst", ["audio_file"]),
        )

        cros_test_lib.VerifyOnDiskHierarchy(self.tempdir, expected_file_layout)

        self.assertTempFileContents(audio_dst_path, "[Speaker A Settings]")

    def testReplicateInvalidRules(self):
        """Tests invalid FileReplicationRules cause errors."""
        with self.assertRaisesRegex(
            ValueError,
            "Rule for JSON source a.json must use REPLICATION_TYPE_FILTER",
        ):
            replication_lib.Replicate(
                ReplicationConfig(
                    file_replication_rules=[
                        FileReplicationRule(
                            source_path="a.json",
                            destination_path="b.json",
                            file_type=FILE_TYPE_JSON,
                            replication_type=REPLICATION_TYPE_COPY,
                        ),
                    ]
                )
            )

        with self.assertRaisesRegex(
            ValueError, "Rule for source a.bin must use REPLICATION_TYPE_COPY"
        ):
            replication_lib.Replicate(
                ReplicationConfig(
                    file_replication_rules=[
                        FileReplicationRule(
                            source_path="a.bin",
                            destination_path="b.bin",
                            file_type=FILE_TYPE_OTHER,
                            replication_type=REPLICATION_TYPE_FILTER,
                        ),
                    ]
                )
            )

        with self.assertRaisesRegex(
            ValueError,
            "Rule with REPLICATION_TYPE_COPY cannot use destination_fields",
        ):
            replication_lib.Replicate(
                ReplicationConfig(
                    file_replication_rules=[
                        FileReplicationRule(
                            source_path="a.bin",
                            destination_path="b.bin",
                            file_type=FILE_TYPE_OTHER,
                            replication_type=REPLICATION_TYPE_COPY,
                            destination_fields=FieldMask(paths=["c", "d"]),
                        ),
                    ]
                )
            )

        with self.assertRaisesRegex(
            ValueError,
            "Rule with REPLICATION_TYPE_FILTER must use destination_fields",
        ):
            replication_lib.Replicate(
                ReplicationConfig(
                    file_replication_rules=[
                        FileReplicationRule(
                            source_path="a.json",
                            destination_path="b.json",
                            file_type=FILE_TYPE_JSON,
                            replication_type=REPLICATION_TYPE_FILTER,
                        ),
                    ]
                )
            )

        with self.assertRaisesRegex(
            ValueError, "Only paths relative to the source root are allowed"
        ):
            replication_lib.Replicate(
                ReplicationConfig(
                    file_replication_rules=[
                        FileReplicationRule(
                            source_path="/src/a.bin",
                            destination_path="b.bin",
                            file_type=FILE_TYPE_OTHER,
                            replication_type=REPLICATION_TYPE_COPY,
                        ),
                    ]
                )
            )

        with self.assertRaisesRegex(
            ValueError, "Only paths relative to the source root are allowed"
        ):
            replication_lib.Replicate(
                ReplicationConfig(
                    file_replication_rules=[
                        FileReplicationRule(
                            source_path="a.bin",
                            destination_path="/src/b.bin",
                            file_type=FILE_TYPE_OTHER,
                            replication_type=REPLICATION_TYPE_COPY,
                        ),
                    ]
                )
            )

    def testReplicateFileMode(self):
        """Tests file mode data is replicated."""
        # Check that the original mode is not 777 and then chmod.
        full_audio_path = os.path.join(self.tempdir, self.audio_path)
        self.assertNotEqual(
            stat.S_IMODE(os.stat(full_audio_path).st_mode), 0o777
        )
        os.chmod(full_audio_path, 0o777)

        audio_dst_path = os.path.join("dst", "audio_file")

        replication_config = ReplicationConfig(
            file_replication_rules=[
                FileReplicationRule(
                    source_path=self.audio_path,
                    destination_path=audio_dst_path,
                    file_type=FILE_TYPE_OTHER,
                    replication_type=REPLICATION_TYPE_COPY,
                ),
            ]
        )

        replication_lib.Replicate(replication_config)

        self.assertEqual(
            stat.S_IMODE(
                os.stat(os.path.join(self.tempdir, audio_dst_path)).st_mode
            ),
            0o777,
        )

    def testReplicateNonChromeOSConfig(self):
        """Test replicating a non ChromeOS Config payload JSON file."""
        src_path = os.path.join("src", "other.json")
        dst_path = os.path.join("dst", "other.json")
        self.WriteTempFile(src_path, json.dumps({"a": 1, "b": 2}))

        replication_config = ReplicationConfig(
            file_replication_rules=[
                FileReplicationRule(
                    source_path=src_path,
                    destination_path=dst_path,
                    file_type=FILE_TYPE_JSON,
                    replication_type=REPLICATION_TYPE_FILTER,
                    destination_fields=FieldMask(paths=["a"]),
                ),
            ]
        )

        with self.assertRaisesRegex(
            NotImplementedError, "Currently only ChromeOS Configs are supported"
        ):
            replication_lib.Replicate(replication_config)

    def testReplicateStringReplicationRules(self):
        audio_dst_path = os.path.join("dst", "audio_file")

        replication_config = ReplicationConfig(
            file_replication_rules=[
                FileReplicationRule(
                    source_path=self.audio_path,
                    destination_path=audio_dst_path,
                    file_type=FILE_TYPE_OTHER,
                    replication_type=REPLICATION_TYPE_COPY,
                    string_replacement_rules=[
                        StringReplacementRule(before="A", after="B"),
                        StringReplacementRule(
                            before="Settings", after="Settings (Updated)"
                        ),
                    ],
                ),
            ]
        )

        replication_lib.Replicate(replication_config)

        self.assertTempFileContents(
            audio_dst_path, "[Speaker B Settings (Updated)]"
        )

    def testReplicateJsonTrailingNewline(self):
        """Test JSON payloads have a trailing newline."""
        build_config_dst_path = os.path.join("dst", "build_config.json")

        replication_config = ReplicationConfig(
            file_replication_rules=[
                FileReplicationRule(
                    source_path=self.build_config_path,
                    destination_path=build_config_dst_path,
                    file_type=FILE_TYPE_JSON,
                    replication_type=REPLICATION_TYPE_FILTER,
                    destination_fields=FieldMask(paths=["name", "field2"]),
                ),
            ]
        )

        replication_lib.Replicate(replication_config)

        self.assertEqual(self.ReadTempFile(build_config_dst_path)[-1], "\n")