from collections.abc import Iterator

import pytest
from moto import mock_aws

from infrastructure.s3.s3_client import S3Client
from tests.infrastructure import make_boto_client

BUCKET = "test-bucket"


@pytest.fixture
def s3_client() -> Iterator[S3Client]:
    with mock_aws():
        boto_client = make_boto_client("s3")
        boto_client.create_bucket(Bucket=BUCKET)
        yield S3Client(boto_client, BUCKET)


def test_put_object_returns_s3_uri(s3_client: S3Client) -> None:
    # act
    uri = s3_client.put_object("folder/data.bin", b"payload")
    # assert
    assert uri == f"s3://{BUCKET}/folder/data.bin"


def test_get_object_returns_bytes_written_by_put_object(s3_client: S3Client) -> None:
    # arrange
    s3_client.put_object("round/trip.bin", b"hello world")
    # act / assert
    assert s3_client.get_object("round/trip.bin") == b"hello world"


def test_bucket_property_exposes_configured_bucket(s3_client: S3Client) -> None:
    # act / assert
    assert s3_client.bucket == BUCKET


def test_generate_presigned_url_signs_a_get_for_the_object(s3_client: S3Client) -> None:
    # arrange
    s3_client.put_object("bulk-downloads/pkg.zip", b"zip-bytes")

    # act
    url = s3_client.generate_presigned_url("bulk-downloads/pkg.zip", expires_in=3600)

    # assert — a signed GET URL for this bucket + key
    assert BUCKET in url
    assert "bulk-downloads/pkg.zip" in url
    assert "Signature" in url