import json
import logging
import os

import pytest
from boto3.session import Session
from moto import mock_s3
from pydantic import ValidationError

from datahub.ingestion.run.pipeline import Pipeline, PipelineContext
from datahub.ingestion.source.s3.source import S3Source
from tests.test_helpers import mce_helpers

FROZEN_TIME = "2020-04-14 07:00:00"


@pytest.fixture(scope="module", autouse=True)
def bucket_name():
    return "my-test-bucket"


@pytest.fixture(scope="module", autouse=True)
def s3():
    with mock_s3():
        conn = Session(
            aws_access_key_id="test",
            aws_secret_access_key="test",
            region_name="us-east-1",
        )
        yield conn


@pytest.fixture(scope="module", autouse=True)
def s3_resource(s3):
    with mock_s3():
        conn = s3.resource("s3")
        yield conn


@pytest.fixture(scope="module", autouse=True)
def s3_client(s3):
    with mock_s3():
        conn = s3.client("s3")
        yield conn


@pytest.fixture(scope="module", autouse=True)
def s3_populate(pytestconfig, s3_resource, s3_client, bucket_name):
    logging.info("Populating s3 bucket")
    s3_resource.create_bucket(Bucket=bucket_name)
    bkt = s3_resource.Bucket(bucket_name)
    bkt.Tagging().put(Tagging={"TagSet": [{"Key": "foo", "Value": "bar"}]})
    test_resources_dir = (
        pytestconfig.rootpath / "tests/integration/s3/test_data/local_system/"
    )
    for root, dirs, files in os.walk(test_resources_dir):
        for file in files:
            full_path = os.path.join(root, file)
            rel_path = os.path.relpath(full_path, test_resources_dir)
            bkt.upload_file(full_path, rel_path)
            s3_client.put_object_tagging(
                Bucket=bucket_name,
                Key=rel_path,
                Tagging={"TagSet": [{"Key": "baz", "Value": "bob"}]},
            )
    yield


SOURCE_FILES_PATH = "./tests/integration/s3/sources/s3"
source_files = os.listdir(SOURCE_FILES_PATH)


@pytest.mark.slow_unit
@pytest.mark.parametrize("source_file", source_files)
def test_data_lake_s3_ingest(
    pytestconfig, s3_populate, source_file, tmp_path, mock_time
):
    test_resources_dir = pytestconfig.rootpath / "tests/integration/s3/"

    f = open(os.path.join(SOURCE_FILES_PATH, source_file))
    source = json.load(f)

    config_dict = {}
    config_dict["source"] = source
    config_dict["sink"] = {
        "type": "file",
        "config": {
            "filename": f"{tmp_path}/{source_file}",
        },
    }

    config_dict["run_id"] = source_file

    pipeline = Pipeline.create(config_dict)
    pipeline.run()
    pipeline.raise_from_status()

    # Verify the output.
    mce_helpers.check_golden_file(
        pytestconfig,
        output_path=f"{tmp_path}/{source_file}",
        golden_path=f"{test_resources_dir}/golden-files/s3/golden_mces_{source_file}",
    )


@pytest.mark.slow_unit
@pytest.mark.parametrize("source_file", source_files)
def test_data_lake_local_ingest(pytestconfig, source_file, tmp_path, mock_time):
    test_resources_dir = pytestconfig.rootpath / "tests/integration/s3/"

    f = open(os.path.join(SOURCE_FILES_PATH, source_file))
    source = json.load(f)

    config_dict = {}
    for path_spec in source["config"]["path_specs"]:
        path_spec["include"] = path_spec["include"].replace(
            "s3://my-test-bucket/", "tests/integration/s3/test_data/local_system/"
        )

    source["config"]["profiling"]["enabled"] = True
    source["config"].pop("aws_config")
    source["config"].pop("use_s3_bucket_tags", None)
    source["config"].pop("use_s3_object_tags", None)
    config_dict["source"] = source
    config_dict["sink"] = {
        "type": "file",
        "config": {
            "filename": f"{tmp_path}/{source_file}",
        },
    }

    config_dict["run_id"] = source_file

    pipeline = Pipeline.create(config_dict)
    pipeline.run()
    pipeline.raise_from_status()

    # Verify the output.
    mce_helpers.check_golden_file(
        pytestconfig,
        output_path=f"{tmp_path}/{source_file}",
        golden_path=f"{test_resources_dir}/golden-files/local/golden_mces_{source_file}",
    )


def test_data_lake_incorrect_config_raises_error(tmp_path, mock_time):
    ctx = PipelineContext(run_id="test-s3")

    # Case 1 : named variable in table name is not present in include
    source: dict = {
        "path_spec": {"include": "a/b/c/d/{table}.*", "table_name": "{table1}"}
    }
    with pytest.raises(ValidationError, match="table_name"):
        S3Source.create(source, ctx)

    # Case 2 : named variable in exclude is not allowed
    source = {
        "path_spec": {
            "include": "a/b/c/d/{table}/*.*",
            "exclude": ["a/b/c/d/a-{exclude}/**"],
        },
    }
    with pytest.raises(ValidationError, match=r"exclude.*named variable"):
        S3Source.create(source, ctx)

    # Case 3 : unsupported file type not allowed
    source = {
        "path_spec": {
            "include": "a/b/c/d/{table}/*.hd5",
        }
    }
    with pytest.raises(ValidationError, match="file type"):
        S3Source.create(source, ctx)

    # Case 4 : ** in include not allowed
    source = {
        "path_spec": {
            "include": "a/b/c/d/**/*.*",
        },
    }
    with pytest.raises(ValidationError, match=r"\*\*"):
        S3Source.create(source, ctx)