"""
Tests for app/utils/sentry.py

Tests Sentry SDK initialisation logic, including:
- No-op when DSN is absent
- Successful init when DSN is present
- Celery integration activation
- Missing sentry-sdk package handling
- Sample rate clamping
"""

import builtins
from unittest.mock import MagicMock

import pytest


@pytest.mark.unit
class TestInitSentry:
    """Test init_sentry() behaviour under various configurations"""

    def test_returns_false_when_no_dsn(self, mocker):
        """init_sentry returns False and does nothing when SENTRY_DSN is not set."""
        mock_settings = mocker.patch("app.utils.sentry.settings")
        mock_settings.sentry_dsn = None

        from app.utils.sentry import init_sentry

        result = init_sentry()

        assert result is False

    def test_returns_false_when_dsn_empty_string(self, mocker):
        """init_sentry returns False when SENTRY_DSN is an empty string."""
        mock_settings = mocker.patch("app.utils.sentry.settings")
        mock_settings.sentry_dsn = ""

        from app.utils.sentry import init_sentry

        result = init_sentry()

        assert result is False

    def test_returns_false_when_sentry_not_installed(self, mocker):
        """init_sentry returns False and logs a warning when sentry_sdk is missing."""
        mock_settings = mocker.patch("app.utils.sentry.settings")
        mock_settings.sentry_dsn = "https://key@sentry.io/123"

        # Simulate sentry_sdk not being importable by patching the import at module level

        original_import = builtins.__import__

        def _block_sentry(name, *args, **kwargs):
            if name.startswith("sentry_sdk"):
                raise ImportError(f"No module named '{name}'")
            return original_import(name, *args, **kwargs)

        mocker.patch("builtins.__import__", side_effect=_block_sentry)

        from app.utils.sentry import init_sentry

        result = init_sentry()

        assert result is False

    def test_initialises_sentry_with_dsn(self, mocker):
        """init_sentry calls sentry_sdk.init when a DSN is provided."""
        mock_settings = mocker.patch("app.utils.sentry.settings")
        mock_settings.sentry_dsn = "https://key@o123.ingest.sentry.io/456"
        mock_settings.sentry_environment = "production"
        mock_settings.sentry_traces_sample_rate = 0.1
        mock_settings.sentry_profiles_sample_rate = 0.0
        mock_settings.sentry_send_default_pii = False
        mock_settings.version = "1.2.3"

        mock_sdk_init = mocker.patch("sentry_sdk.init")
        # Patch the integrations so we don't need real Sentry internals
        mocker.patch("sentry_sdk.integrations.fastapi.FastApiIntegration", return_value=MagicMock())
        mocker.patch("sentry_sdk.integrations.starlette.StarletteIntegration", return_value=MagicMock())
        mocker.patch("sentry_sdk.integrations.sqlalchemy.SqlalchemyIntegration", return_value=MagicMock())
        mocker.patch("sentry_sdk.integrations.logging.LoggingIntegration", return_value=MagicMock())

        from app.utils.sentry import init_sentry

        result = init_sentry()

        assert result is True
        mock_sdk_init.assert_called_once()
        call_kwargs = mock_sdk_init.call_args.kwargs
        assert call_kwargs["dsn"] == "https://key@o123.ingest.sentry.io/456"
        assert call_kwargs["environment"] == "production"
        assert call_kwargs["release"] == "1.2.3"
        assert call_kwargs["send_default_pii"] is False

    def test_celery_integration_included_when_requested(self, mocker):
        """CeleryIntegration is appended when integrations_extra=['celery']."""
        mock_settings = mocker.patch("app.utils.sentry.settings")
        mock_settings.sentry_dsn = "https://key@o1.ingest.sentry.io/1"
        mock_settings.sentry_environment = "staging"
        mock_settings.sentry_traces_sample_rate = 0.5
        mock_settings.sentry_profiles_sample_rate = 0.0
        mock_settings.sentry_send_default_pii = False
        mock_settings.version = None

        mock_sdk_init = mocker.patch("sentry_sdk.init")
        mock_celery_cls = mocker.patch("sentry_sdk.integrations.celery.CeleryIntegration", return_value=MagicMock())
        mocker.patch("sentry_sdk.integrations.fastapi.FastApiIntegration", return_value=MagicMock())
        mocker.patch("sentry_sdk.integrations.starlette.StarletteIntegration", return_value=MagicMock())
        mocker.patch("sentry_sdk.integrations.sqlalchemy.SqlalchemyIntegration", return_value=MagicMock())
        mocker.patch("sentry_sdk.integrations.logging.LoggingIntegration", return_value=MagicMock())

        from app.utils.sentry import init_sentry

        result = init_sentry(integrations_extra=["celery"])

        assert result is True
        mock_celery_cls.assert_called_once_with(monitor_beat_tasks=True)

    def test_traces_sample_rate_clamped_above_one(self, mocker):
        """Traces sample rate values above 1.0 are clamped to 1.0."""
        mock_settings = mocker.patch("app.utils.sentry.settings")
        mock_settings.sentry_dsn = "https://key@o1.ingest.sentry.io/1"
        mock_settings.sentry_environment = "test"
        mock_settings.sentry_traces_sample_rate = 99.0  # invalid – too high
        mock_settings.sentry_profiles_sample_rate = 0.0
        mock_settings.sentry_send_default_pii = False
        mock_settings.version = None

        mock_sdk_init = mocker.patch("sentry_sdk.init")
        mocker.patch("sentry_sdk.integrations.fastapi.FastApiIntegration", return_value=MagicMock())
        mocker.patch("sentry_sdk.integrations.starlette.StarletteIntegration", return_value=MagicMock())
        mocker.patch("sentry_sdk.integrations.sqlalchemy.SqlalchemyIntegration", return_value=MagicMock())
        mocker.patch("sentry_sdk.integrations.logging.LoggingIntegration", return_value=MagicMock())

        from app.utils.sentry import init_sentry

        init_sentry()

        call_kwargs = mock_sdk_init.call_args.kwargs
        assert call_kwargs["traces_sample_rate"] == 1.0

    def test_traces_sample_rate_clamped_below_zero(self, mocker):
        """Traces sample rate values below 0.0 are clamped to 0.0."""
        mock_settings = mocker.patch("app.utils.sentry.settings")
        mock_settings.sentry_dsn = "https://key@o1.ingest.sentry.io/1"
        mock_settings.sentry_environment = "test"
        mock_settings.sentry_traces_sample_rate = -5.0  # invalid – negative
        mock_settings.sentry_profiles_sample_rate = 0.0
        mock_settings.sentry_send_default_pii = False
        mock_settings.version = None

        mock_sdk_init = mocker.patch("sentry_sdk.init")
        mocker.patch("sentry_sdk.integrations.fastapi.FastApiIntegration", return_value=MagicMock())
        mocker.patch("sentry_sdk.integrations.starlette.StarletteIntegration", return_value=MagicMock())
        mocker.patch("sentry_sdk.integrations.sqlalchemy.SqlalchemyIntegration", return_value=MagicMock())
        mocker.patch("sentry_sdk.integrations.logging.LoggingIntegration", return_value=MagicMock())

        from app.utils.sentry import init_sentry

        init_sentry()

        call_kwargs = mock_sdk_init.call_args.kwargs
        assert call_kwargs["traces_sample_rate"] == 0.0

    def test_no_celery_integration_when_not_requested(self, mocker):
        """CeleryIntegration is not included when integrations_extra is empty."""
        mock_settings = mocker.patch("app.utils.sentry.settings")
        mock_settings.sentry_dsn = "https://key@o1.ingest.sentry.io/1"
        mock_settings.sentry_environment = "test"
        mock_settings.sentry_traces_sample_rate = 0.0
        mock_settings.sentry_profiles_sample_rate = 0.0
        mock_settings.sentry_send_default_pii = False
        mock_settings.version = None

        mock_sdk_init = mocker.patch("sentry_sdk.init")
        mock_celery_cls = mocker.patch("sentry_sdk.integrations.celery.CeleryIntegration", return_value=MagicMock())
        mocker.patch("sentry_sdk.integrations.fastapi.FastApiIntegration", return_value=MagicMock())
        mocker.patch("sentry_sdk.integrations.starlette.StarletteIntegration", return_value=MagicMock())
        mocker.patch("sentry_sdk.integrations.sqlalchemy.SqlalchemyIntegration", return_value=MagicMock())
        mocker.patch("sentry_sdk.integrations.logging.LoggingIntegration", return_value=MagicMock())

        from app.utils.sentry import init_sentry

        init_sentry()

        mock_celery_cls.assert_not_called()
        mock_sdk_init.assert_called_once()


@pytest.mark.unit
class TestGetAppVersion:
    """Test the internal _get_app_version helper."""

    def test_returns_version_from_settings(self, mocker):
        """_get_app_version returns settings.version when available."""
        mock_settings = mocker.patch("app.utils.sentry.settings")
        mock_settings.version = "2.0.0"

        from app.utils.sentry import _get_app_version

        assert _get_app_version() == "2.0.0"

    def test_returns_none_when_version_unknown(self, mocker):
        """_get_app_version returns None when version is 'unknown' or empty."""
        mock_settings = mocker.patch("app.utils.sentry.settings")
        mock_settings.version = None

        from app.utils.sentry import _get_app_version

        assert _get_app_version() is None


# ---------------------------------------------------------------------------
# Helpers
# ---------------------------------------------------------------------------