# MIT License
#
# Copyright (c) 2020 Airbyte
#
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# of this software and associated documentation files (the "Software"), to deal
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# furnished to do so, subject to the following conditions:
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# SOFTWARE.


import json
import os
import shutil
import sys
from collections.abc import Mapping
from pathlib import Path

from airbyte_cdk.base_python.schema_helpers import ResourceSchemaLoader
from pytest import fixture

MODULE = sys.modules[__name__]
MODULE_NAME = MODULE.__name__.split(".")[0]
SCHEMAS_ROOT = "/".join(os.path.abspath(MODULE.__file__).split("/")[:-1]) / Path("schemas")


# TODO (sherif) refactor ResourceSchemaLoader to completely separate the functionality for reading data from the package. See https://github.com/airbytehq/airbyte/issues/3222
#  and the functionality for resolving schemas. See https://github.com/airbytehq/airbyte/issues/3222
@fixture(autouse=True, scope="session")
def create_and_teardown_schemas_dir():
    os.mkdir(SCHEMAS_ROOT)
    os.mkdir(SCHEMAS_ROOT / "shared")
    yield
    shutil.rmtree(SCHEMAS_ROOT)


def create_schema(name: str, content: Mapping):
    with open(SCHEMAS_ROOT / f"{name}.json", "w") as f:
        f.write(json.dumps(content))


class TestResourceSchemaLoader:
    # Test that a simple schema is loaded correctly
    @staticmethod
    def test_inline_schema_resolves():
        expected_schema = {
            "type": ["null", "object"],
            "properties": {
                "str": {"type": "string"},
                "int": {"type": "integer"},
                "obj": {"type": ["null", "object"], "properties": {"k1": {"type": "string"}}},
            },
        }

        create_schema("simple_schema", expected_schema)
        resolver = ResourceSchemaLoader(MODULE_NAME)
        actual_schema = resolver.get_schema("simple_schema")
        assert actual_schema == expected_schema

    @staticmethod
    def test_shared_schemas_resolves():
        expected_schema = {
            "type": ["null", "object"],
            "properties": {
                "str": {"type": "string"},
                "int": {"type": "integer"},
                "obj": {"type": ["null", "object"], "properties": {"k1": {"type": "string"}}},
            },
        }

        partial_schema = {
            "type": ["null", "object"],
            "properties": {"str": {"type": "string"}, "int": {"type": "integer"}, "obj": {"$ref": "shared_schema.json"}},
        }

        referenced_schema = {"type": ["null", "object"], "properties": {"k1": {"type": "string"}}}

        create_schema("complex_schema", partial_schema)
        create_schema("shared/shared_schema", referenced_schema)

        resolver = ResourceSchemaLoader(MODULE_NAME)

        actual_schema = resolver.get_schema("complex_schema")
        assert actual_schema == expected_schema