"""Tests for License Gate service (license_gate.py)."""

import pytest
from unittest.mock import MagicMock, patch
from collections import namedtuple

from compliance.services.license_gate import (
    check_source_allowed,
    get_license_matrix,
    get_source_permissions,
    USAGE_COLUMN_MAP,
)


class TestUsageColumnMap:
    """Test the usage type to column mapping."""

    def test_all_usage_types_mapped(self):
        expected = {"analysis", "store_excerpt", "ship_embeddings", "ship_in_product"}
        assert set(USAGE_COLUMN_MAP.keys()) == expected

    def test_column_names(self):
        assert USAGE_COLUMN_MAP["analysis"] == "allowed_analysis"
        assert USAGE_COLUMN_MAP["store_excerpt"] == "allowed_store_excerpt"
        assert USAGE_COLUMN_MAP["ship_embeddings"] == "allowed_ship_embeddings"
        assert USAGE_COLUMN_MAP["ship_in_product"] == "allowed_ship_in_product"


class TestCheckSourceAllowed:
    """Tests for check_source_allowed()."""

    def _mock_db(self, return_value):
        db = MagicMock()
        mock_result = MagicMock()
        if return_value is None:
            mock_result.fetchone.return_value = None
        else:
            mock_result.fetchone.return_value = (return_value,)
        db.execute.return_value = mock_result
        return db

    def test_allowed_analysis(self):
        db = self._mock_db(True)
        assert check_source_allowed(db, "OWASP_ASVS", "analysis") is True

    def test_denied_ship_in_product(self):
        db = self._mock_db(False)
        assert check_source_allowed(db, "BSI_TR03161_1", "ship_in_product") is False

    def test_unknown_source(self):
        db = self._mock_db(None)
        assert check_source_allowed(db, "NONEXISTENT", "analysis") is False

    def test_unknown_usage_type(self):
        db = MagicMock()
        assert check_source_allowed(db, "OWASP_ASVS", "invalid_type") is False
        # DB should not be called for invalid usage type
        db.execute.assert_not_called()

    def test_allowed_store_excerpt(self):
        db = self._mock_db(True)
        assert check_source_allowed(db, "OWASP_ASVS", "store_excerpt") is True

    def test_denied_store_excerpt(self):
        db = self._mock_db(False)
        assert check_source_allowed(db, "BSI_TR03161_1", "store_excerpt") is False


class TestGetLicenseMatrix:
    """Tests for get_license_matrix()."""

    def test_returns_list(self):
        LicRow = namedtuple("LicRow", [
            "license_id", "name", "terms_url", "commercial_use",
            "ai_training_restriction", "tdm_allowed_under_44b",
            "deletion_required", "notes",
        ])
        rows = [
            LicRow("OWASP_CC_BY_SA", "CC BY-SA 4.0", "https://example.com",
                   "allowed", None, "yes", False, "Open source"),
            LicRow("BSI_TOS_2025", "BSI ToS", "https://bsi.bund.de",
                   "restricted", "unclear", "yes", True, "Commercial restricted"),
        ]

        db = MagicMock()
        db.execute.return_value.fetchall.return_value = rows
        result = get_license_matrix(db)

        assert len(result) == 2
        assert result[0]["license_id"] == "OWASP_CC_BY_SA"
        assert result[0]["commercial_use"] == "allowed"
        assert result[0]["deletion_required"] is False
        assert result[1]["license_id"] == "BSI_TOS_2025"
        assert result[1]["commercial_use"] == "restricted"
        assert result[1]["deletion_required"] is True

    def test_empty_result(self):
        db = MagicMock()
        db.execute.return_value.fetchall.return_value = []
        result = get_license_matrix(db)
        assert result == []


class TestGetSourcePermissions:
    """Tests for get_source_permissions()."""

    def test_returns_list_with_join(self):
        SrcRow = namedtuple("SrcRow", [
            "source_id", "title", "publisher", "url", "version_label",
            "language", "license_id", "allowed_analysis", "allowed_store_excerpt",
            "allowed_ship_embeddings", "allowed_ship_in_product",
            "vault_retention_days", "vault_access_tier",
            "license_name", "commercial_use",
        ])
        rows = [
            SrcRow(
                "OWASP_ASVS", "OWASP ASVS", "OWASP Foundation",
                "https://owasp.org", "4.0.3", "en", "OWASP_CC_BY_SA",
                True, True, True, True, 30, "public",
                "CC BY-SA 4.0", "allowed",
            ),
        ]

        db = MagicMock()
        db.execute.return_value.fetchall.return_value = rows
        result = get_source_permissions(db)

        assert len(result) == 1
        src = result[0]
        assert src["source_id"] == "OWASP_ASVS"
        assert src["allowed_analysis"] is True
        assert src["allowed_ship_in_product"] is True
        assert src["license_name"] == "CC BY-SA 4.0"
        assert src["commercial_use"] == "allowed"

    def test_restricted_source(self):
        SrcRow = namedtuple("SrcRow", [
            "source_id", "title", "publisher", "url", "version_label",
            "language", "license_id", "allowed_analysis", "allowed_store_excerpt",
            "allowed_ship_embeddings", "allowed_ship_in_product",
            "vault_retention_days", "vault_access_tier",
            "license_name", "commercial_use",
        ])
        rows = [
            SrcRow(
                "BSI_TR03161_1", "BSI TR-03161 Teil 1", "BSI",
                "https://bsi.bund.de", "1.0", "de", "BSI_TOS_2025",
                True, False, False, False, 30, "restricted",
                "BSI Nutzungsbedingungen", "restricted",
            ),
        ]

        db = MagicMock()
        db.execute.return_value.fetchall.return_value = rows
        result = get_source_permissions(db)

        src = result[0]
        assert src["allowed_analysis"] is True
        assert src["allowed_store_excerpt"] is False
        assert src["allowed_ship_embeddings"] is False
        assert src["allowed_ship_in_product"] is False