"""Tests for plugin versioning: upgrade, downgrade, compatibility checks."""

from __future__ import annotations

import pytest

from app.plugins.semver import SemVer
from app.plugins.manifest import PluginManifest


class TestManifestVersioning:
    def test_manifest_has_min_app_version(self):
        """PluginManifest has min_app_version field."""
        m = PluginManifest(
            name="test",
            version="1.0.0",
            display_name="Test",
        )
        assert hasattr(m, "min_app_version")
        assert m.min_app_version == "0.0.0"

    def test_manifest_with_min_app_version(self):
        """PluginManifest can set min_app_version."""
        m = PluginManifest(
            name="test",
            version="1.0.0",
            display_name="Test",
            min_app_version="1.5.0",
        )
        assert m.min_app_version == "1.5.0"

    def test_manifest_extra_forbid_still_works(self):
        """Manifest still rejects unknown fields."""
        with pytest.raises(Exception):
            PluginManifest(
                name="test",
                version="1.0.0",
                display_name="Test",
                unknown_field="value",
            )


class TestVersionComparison:
    def test_upgrade_detection(self):
        """SemVer correctly detects upgrades."""
        old = SemVer.parse("1.0.0")
        new = SemVer.parse("1.1.0")
        assert new.is_upgrade_from(old)
        assert not old.is_upgrade_from(new)

    def test_downgrade_detection(self):
        """SemVer correctly detects downgrades."""
        old = SemVer.parse("1.1.0")
        new = SemVer.parse("1.0.0")
        assert new.is_downgrade_from(old)

    def test_breaking_change_detection(self):
        """Major version change is a breaking change."""
        assert SemVer.parse("1.0.0").is_breaking_change(SemVer.parse("2.0.0"))
        assert not SemVer.parse("1.0.0").is_breaking_change(SemVer.parse("1.5.0"))

    def test_compatibility_check(self):
        """Version compatibility works correctly."""
        assert SemVer.parse("1.5.0").is_compatible_with(SemVer.parse("1.0.0"))
        assert not SemVer.parse("1.0.0").is_compatible_with(SemVer.parse("1.5.0"))
        assert SemVer.parse("2.0.0").is_compatible_with(SemVer.parse("1.0.0"))
        assert not SemVer.parse("1.0.0").is_compatible_with(SemVer.parse("2.0.0"))