import os
import json

import pytest

from image.docker.schema1 import DockerSchema1Manifest, DOCKER_SCHEMA1_CONTENT_TYPES
from image.docker.schema2.manifest import DockerSchema2Manifest
from image.docker.schemautil import ContentRetrieverForTesting
from util.bytes import Bytes


def _get_test_file_contents(test_name, kind):
  filename = '%s.%s.json' % (test_name, kind)
  data_dir = os.path.dirname(__file__)
  with open(os.path.join(data_dir, 'conversion_data', filename), 'r') as f:
    return Bytes.for_string_or_unicode(f.read())


@pytest.mark.parametrize('name, config_sha', [
  ('simple', 'sha256:e7a06c2e5b7afb1bbfa9124812e87f1138c4c10d77e0a217f0b8c8c9694dc5cf'),
  ('complex', 'sha256:ae6b78bedf88330a5e5392164f40d28ed8a38120b142905d30b652ebffece10e'),
  ('ubuntu', 'sha256:93fd78260bd1495afb484371928661f63e64be306b7ac48e2d13ce9422dfee26'),
])
def test_legacy_layers(name, config_sha):
  cr = {}
  cr[config_sha] = _get_test_file_contents(name, 'config').as_encoded_str()
  retriever = ContentRetrieverForTesting(cr)

  schema2 = DockerSchema2Manifest(_get_test_file_contents(name, 'schema2'))
  schema1 = DockerSchema1Manifest(_get_test_file_contents(name, 'schema1'), validate=False)

  # Check legacy layers
  schema2_legacy_layers = list(schema2.generate_legacy_layers({}, retriever))
  schema1_legacy_layers = list(schema1.generate_legacy_layers({}, retriever))
  assert len(schema1_legacy_layers) == len(schema2_legacy_layers)

  for index in range(0, len(schema1_legacy_layers)):
    schema1_legacy_layer = schema1_legacy_layers[index]
    schema2_legacy_layer = schema2_legacy_layers[index]
    assert schema1_legacy_layer.content_checksum == schema2_legacy_layer.content_checksum
    assert schema1_legacy_layer.comment == schema2_legacy_layer.comment
    assert schema1_legacy_layer.command == schema2_legacy_layer.command


@pytest.mark.parametrize('name, config_sha', [
  ('simple', 'sha256:e7a06c2e5b7afb1bbfa9124812e87f1138c4c10d77e0a217f0b8c8c9694dc5cf'),
  ('complex', 'sha256:ae6b78bedf88330a5e5392164f40d28ed8a38120b142905d30b652ebffece10e'),
  ('ubuntu', 'sha256:93fd78260bd1495afb484371928661f63e64be306b7ac48e2d13ce9422dfee26'),
])
def test_conversion(name, config_sha):
  cr = {}
  cr[config_sha] = _get_test_file_contents(name, 'config').as_encoded_str()
  retriever = ContentRetrieverForTesting(cr)

  schema2 = DockerSchema2Manifest(_get_test_file_contents(name, 'schema2'))
  schema1 = DockerSchema1Manifest(_get_test_file_contents(name, 'schema1'), validate=False)

  s2to2 = schema2.convert_manifest([schema2.media_type], 'devtable', 'somerepo', 'latest',
                                   retriever)
  assert s2to2 == schema2

  s1to1 = schema1.convert_manifest([schema1.media_type], 'devtable', 'somerepo', 'latest',
                                   retriever)
  assert s1to1 == schema1

  s2to1 = schema2.convert_manifest(DOCKER_SCHEMA1_CONTENT_TYPES, 'devtable', 'somerepo', 'latest',
                                   retriever)
  assert s2to1.media_type in DOCKER_SCHEMA1_CONTENT_TYPES
  assert len(s2to1.layers) == len(schema1.layers)

  s2toempty = schema2.convert_manifest([], 'devtable', 'somerepo', 'latest', retriever)
  assert s2toempty is None


@pytest.mark.parametrize('name, config_sha', [
  ('simple', 'sha256:e7a06c2e5b7afb1bbfa9124812e87f1138c4c10d77e0a217f0b8c8c9694dc5cf'),
  ('complex', 'sha256:ae6b78bedf88330a5e5392164f40d28ed8a38120b142905d30b652ebffece10e'),
  ('ubuntu', 'sha256:93fd78260bd1495afb484371928661f63e64be306b7ac48e2d13ce9422dfee26'),
])
def test_2to1_conversion(name, config_sha):
  cr = {}
  cr[config_sha] = _get_test_file_contents(name, 'config').as_encoded_str()
  retriever = ContentRetrieverForTesting(cr)

  schema2 = DockerSchema2Manifest(_get_test_file_contents(name, 'schema2'))
  schema1 = DockerSchema1Manifest(_get_test_file_contents(name, 'schema1'), validate=False)

  converted = schema2.get_schema1_manifest('devtable', 'somerepo', 'latest', retriever)
  assert len(converted.layers) == len(schema1.layers)

  image_id_map = {}
  for index in range(0, len(converted.layers)):
    converted_layer = converted.layers[index]
    schema1_layer = schema1.layers[index]

    image_id_map[schema1_layer.v1_metadata.image_id] = converted_layer.v1_metadata.image_id

    assert str(schema1_layer.digest) == str(converted_layer.digest)

    schema1_parent_id = schema1_layer.v1_metadata.parent_image_id
    converted_parent_id = converted_layer.v1_metadata.parent_image_id
    assert (schema1_parent_id is None) == (converted_parent_id is None)

    if schema1_parent_id is not None:
      assert image_id_map[schema1_parent_id] == converted_parent_id

    assert schema1_layer.v1_metadata.created == converted_layer.v1_metadata.created
    assert schema1_layer.v1_metadata.comment == converted_layer.v1_metadata.comment
    assert schema1_layer.v1_metadata.command == converted_layer.v1_metadata.command
    assert schema1_layer.v1_metadata.labels == converted_layer.v1_metadata.labels

    schema1_container_config = json.loads(schema1_layer.raw_v1_metadata)['container_config']
    converted_container_config = json.loads(converted_layer.raw_v1_metadata)['container_config']

    assert schema1_container_config == converted_container_config