"""Unit tests for the ClickHouse integration module."""

from integrations.clickhouse import (
    ClickHouseConfig,
    ClickHouseValidationResult,
    build_clickhouse_config,
    clickhouse_config_from_env,
)


class TestClickHouseConfig:
    """Tests for ClickHouseConfig model."""

    def test_defaults(self) -> None:
        config = ClickHouseConfig(host="localhost")
        assert config.host == "localhost"
        assert config.port == 8123
        assert config.database == "default"
        assert config.username == "default"
        assert config.password == ""
        assert config.secure is False
        assert config.timeout_seconds == 10.0
        assert config.max_results == 50

    def test_is_configured_with_host(self) -> None:
        config = ClickHouseConfig(host="ch.example.com")
        assert config.is_configured is True

    def test_is_configured_without_host(self) -> None:
        config = ClickHouseConfig()
        assert config.is_configured is False

    def test_normalize_host_strips_whitespace(self) -> None:
        config = ClickHouseConfig(host="  ch.example.com  ")
        assert config.host == "ch.example.com"

    def test_normalize_empty_host(self) -> None:
        config = ClickHouseConfig(host="")
        assert config.host == ""
        assert config.is_configured is False

    def test_normalize_database_default(self) -> None:
        config = ClickHouseConfig(host="localhost", database="")
        assert config.database == "default"

    def test_normalize_username_default(self) -> None:
        config = ClickHouseConfig(host="localhost", username="")
        assert config.username == "default"

    def test_custom_values(self) -> None:
        config = ClickHouseConfig(
            host="ch.prod.internal",
            port=9440,
            database="analytics",
            username="reader",
            password="secret",
            secure=True,
            timeout_seconds=30.0,
            max_results=100,
        )
        assert config.host == "ch.prod.internal"
        assert config.port == 9440
        assert config.database == "analytics"
        assert config.username == "reader"
        assert config.password == "secret"
        assert config.secure is True
        assert config.timeout_seconds == 30.0
        assert config.max_results == 100


class TestBuildClickHouseConfig:
    """Tests for build_clickhouse_config helper."""

    def test_from_dict(self) -> None:
        config = build_clickhouse_config({"host": "ch.example.com", "port": 9000})
        assert config.host == "ch.example.com"
        assert config.port == 9000

    def test_from_none(self) -> None:
        config = build_clickhouse_config(None)
        assert config.host == ""
        assert config.is_configured is False

    def test_from_empty_dict(self) -> None:
        config = build_clickhouse_config({})
        assert config.host == ""
        assert config.is_configured is False


class TestClickHouseConfigFromEnv:
    """Tests for clickhouse_config_from_env helper."""

    def test_returns_none_without_host(self) -> None:
        import os

        old = os.environ.get("CLICKHOUSE_HOST")
        os.environ.pop("CLICKHOUSE_HOST", None)
        try:
            result = clickhouse_config_from_env()
            assert result is None
        finally:
            if old is not None:
                os.environ["CLICKHOUSE_HOST"] = old

    def test_returns_config_with_host(self) -> None:
        import os

        os.environ["CLICKHOUSE_HOST"] = "ch.test.local"
        os.environ["CLICKHOUSE_PORT"] = "9440"
        os.environ["CLICKHOUSE_DATABASE"] = "testdb"
        os.environ["CLICKHOUSE_USER"] = "testuser"
        os.environ["CLICKHOUSE_PASSWORD"] = "testpass"
        os.environ["CLICKHOUSE_SECURE"] = "true"
        try:
            config = clickhouse_config_from_env()
            assert config is not None
            assert config.host == "ch.test.local"
            assert config.port == 9440
            assert config.database == "testdb"
            assert config.username == "testuser"
            assert config.password == "testpass"
            assert config.secure is True
        finally:
            for key in [
                "CLICKHOUSE_HOST",
                "CLICKHOUSE_PORT",
                "CLICKHOUSE_DATABASE",
                "CLICKHOUSE_USER",
                "CLICKHOUSE_PASSWORD",
                "CLICKHOUSE_SECURE",
            ]:
                os.environ.pop(key, None)


class TestClickHouseValidationResult:
    """Tests for ClickHouseValidationResult dataclass."""

    def test_ok_result(self) -> None:
        result = ClickHouseValidationResult(ok=True, detail="Connected.")
        assert result.ok is True
        assert result.detail == "Connected."

    def test_error_result(self) -> None:
        result = ClickHouseValidationResult(ok=False, detail="Connection refused.")
        assert result.ok is False
        assert result.detail == "Connection refused."