from __future__ import annotations

import pathlib
import tomllib
import unittest

from govoplan_core.core.policy import (
    CAPABILITY_POLICY_DEFINITION_GOVERNANCE,
    CAPABILITY_POLICY_FUNCTION_ASSIGNMENT_GOVERNANCE,
    CAPABILITY_POLICY_PRIVACY_RETENTION,
    CAPABILITY_POLICY_SCHEDULING_PARTICIPANT_PRIVACY,
    CAPABILITY_POLICY_VIEW_GOVERNANCE,
)
from govoplan_core.core.distribution_lists import (
    CAPABILITY_POLICY_DISTRIBUTION_CHANNELS,
)
from govoplan_core.core.reporting import CAPABILITY_POLICY_REPORTING_GOVERNANCE
from govoplan_policy.backend.manifest import manifest


ROOT = pathlib.Path(__file__).resolve().parents[1]


class PolicyModuleContractTests(unittest.TestCase):
    def test_policy_package_does_not_hard_require_access(self) -> None:
        project = tomllib.loads((ROOT / "pyproject.toml").read_text(encoding="utf-8"))[
            "project"
        ]
        dependencies = tuple(project["dependencies"])

        self.assertTrue(
            any(item.startswith("govoplan-core>=") for item in dependencies)
        )
        self.assertFalse(
            any(item.startswith("govoplan-access") for item in dependencies)
        )

    def test_policy_source_does_not_import_access_implementation(self) -> None:
        offenders: list[str] = []
        for path in (ROOT / "src" / "govoplan_policy").rglob("*.py"):
            source = path.read_text(encoding="utf-8")
            if "govoplan_access" in source:
                offenders.append(str(path.relative_to(ROOT)))

        self.assertEqual([], offenders)

    def test_policy_manifest_exposes_policy_capabilities(self) -> None:
        self.assertEqual(
            {
                CAPABILITY_POLICY_DEFINITION_GOVERNANCE,
                CAPABILITY_POLICY_DISTRIBUTION_CHANNELS,
                CAPABILITY_POLICY_FUNCTION_ASSIGNMENT_GOVERNANCE,
                CAPABILITY_POLICY_PRIVACY_RETENTION,
                CAPABILITY_POLICY_REPORTING_GOVERNANCE,
                CAPABILITY_POLICY_SCHEDULING_PARTICIPANT_PRIVACY,
                CAPABILITY_POLICY_VIEW_GOVERNANCE,
            },
            set(manifest.capability_factories),
        )

    def test_retention_documentation_exposes_stable_help_contexts(self) -> None:
        topic = next(
            item
            for item in manifest.documentation
            if item.id == "policy.hierarchy-overrides-and-retention"
        )

        self.assertEqual(
            ["policy.retention", "privacy.retention"],
            topic.metadata["help_contexts"],
        )
        self.assertEqual("workflow", topic.metadata["kind"])
        self.assertIn("/admin", topic.metadata["route"])

    def test_view_policy_administration_contract_is_documented_and_exposed(self) -> None:
        topic = next(
            item
            for item in manifest.documentation
            if item.id == "policy.view-governance-administration"
        )
        self.assertIn("policy.view-governance", topic.metadata["help_contexts"])
        self.assertEqual(
            {
                "policy.admin.system-view-policy",
                "policy.admin.tenant-view-policy",
                "policy.admin.group-view-policy",
                "policy.admin.user-view-policy",
            },
            {
                surface.id
                for surface in manifest.frontend.view_surfaces
                if "view-policy" in surface.id
            },
        )


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