import json
import unittest
from pathlib import Path


REPO_ROOT = Path(__file__).resolve().parents[1]
CRM_PACK = REPO_ROOT / "salesforce-crm-standard"
VALIDATION_RULES = CRM_PACK / "validation" / "standard_validation_rules.json"


EXPECTED_SHARING_RULE_RULES = {
    "SharingRule_Target_Exactly_One": {
        "id": "vrule_sharing_rule_target_exactly_one",
        "condition": "(ISBLANK(ShareWithRoleId) && ISBLANK(ShareWithGroupId)) || (!ISBLANK(ShareWithRoleId) && !ISBLANK(ShareWithGroupId))",
        "errorMessage": "sharing rule must target exactly one role or group",
    },
    "SharingRule_Criteria_Forbids_SharedFrom": {
        "id": "vrule_sharing_rule_criteria_forbids_shared_from",
        "condition": "!ISBLANK(Criteria) && (!ISBLANK(SharedFromRoleId) || !ISBLANK(SharedFromGroupId))",
        "errorMessage": "criteria-based sharing rules cannot define SharedFromRoleId or SharedFromGroupId",
    },
    "SharingRule_Owner_Based_Requires_One_SharedFrom": {
        "id": "vrule_sharing_rule_owner_based_requires_one_shared_from",
        "condition": "ISBLANK(Criteria) && ((ISBLANK(SharedFromRoleId) && ISBLANK(SharedFromGroupId)) || (!ISBLANK(SharedFromRoleId) && !ISBLANK(SharedFromGroupId)))",
        "errorMessage": "owner-based sharing rules must define exactly one SharedFromRoleId or SharedFromGroupId",
    },
}


def load_validation_rules():
    with VALIDATION_RULES.open(encoding="utf-8") as handle:
        return json.load(handle)["validationRules"]


class SharingRuleValidationRulesTest(unittest.TestCase):
    def test_sharing_rule_shape_constraints_are_pack_owned_validation_rules(self):
        rules = {
            rule["name"]: rule
            for rule in load_validation_rules()
            if rule.get("objectApiName") == "SharingRule"
        }

        self.assertEqual(set(rules), set(EXPECTED_SHARING_RULE_RULES))
        for name, expected in EXPECTED_SHARING_RULE_RULES.items():
            with self.subTest(rule=name):
                rule = rules[name]
                self.assertEqual(rule["id"], expected["id"])
                self.assertTrue(rule["active"])
                self.assertEqual(rule["condition"], expected["condition"])
                self.assertEqual(rule["errorMessage"], expected["errorMessage"])
                self.assertIn("SharingRule", rule["description"])


if __name__ == "__main__":
    unittest.main()