"""Unit tests for controllers.common.app_access RBAC app-id access filtering."""

from __future__ import annotations

import pytest

from controllers.common.app_access import (
    APP_LIST_PERMISSION_KEYS,
    AppAccessFilter,
    has_app_list_permission,
    resolve_app_access_filter,
)
from services.app_service import AppListParams
from services.enterprise.rbac_service import (
    MyPermissionsResponse,
    ResourcePermissionKeys,
    ResourcePermissionSnapshot,
    ResourceWhitelistResources,
    WorkspacePermissionSnapshot,
)

_RBAC_MODULE = "controllers.common.app_access.enterprise_rbac_service"


def _permissions(
    *,
    workspace_keys: list[str] | None = None,
    app_default_keys: list[str] | None = None,
    app_overrides: list[ResourcePermissionKeys] | None = None,
) -> MyPermissionsResponse:
    return MyPermissionsResponse(
        workspace=WorkspacePermissionSnapshot(permission_keys=workspace_keys or []),
        app=ResourcePermissionSnapshot(
            default_permission_keys=app_default_keys or [],
            overrides=app_overrides or [],
        ),
    )


class TestHasAppListPermission:
    def test_matches_known_preview_keys(self):
        for key in APP_LIST_PERMISSION_KEYS:
            assert has_app_list_permission([key])

    def test_rejects_unknown_keys(self):
        assert not has_app_list_permission(["app.export", "app.delete"])
        assert not has_app_list_permission([])


class TestAppAccessFilterIsAppAccessible:
    def test_unrestricted_sees_everything(self):
        flt = AppAccessFilter.unrestricted()
        assert flt.is_app_accessible("app-1", maintainer="someone", account_id="acc-1")

    def test_whitelisted_app_is_visible(self):
        flt = AppAccessFilter(accessible_app_ids={"app-1"}, can_manage_own_apps=False)
        assert flt.is_app_accessible("app-1", maintainer=None, account_id="acc-1")
        assert not flt.is_app_accessible("app-2", maintainer=None, account_id="acc-1")

    def test_own_app_visible_only_with_manage_permission(self):
        own = AppAccessFilter(accessible_app_ids=set(), can_manage_own_apps=True)
        assert own.is_app_accessible("app-1", maintainer="acc-1", account_id="acc-1")
        assert not own.is_app_accessible("app-1", maintainer="acc-2", account_id="acc-1")

        no_manage = AppAccessFilter(accessible_app_ids=set(), can_manage_own_apps=False)
        assert not no_manage.is_app_accessible("app-1", maintainer="acc-1", account_id="acc-1")


class TestAppAccessFilterApplyToParams:
    def test_unrestricted_leaves_params_untouched(self):
        params = AppListParams()
        AppAccessFilter.unrestricted().apply_to_params(params)
        assert params.accessible_app_ids is None
        assert params.include_own_apps is False
        assert params.is_created_by_me is None

    def test_whitelisted_ids_are_sorted_with_own_apps_flag(self):
        params = AppListParams()
        AppAccessFilter(accessible_app_ids={"b", "a"}, can_manage_own_apps=True).apply_to_params(params)
        assert params.accessible_app_ids == ["a", "b"]
        assert params.include_own_apps is True

    def test_empty_set_with_manage_falls_back_to_maintained_apps(self):
        # Own-app fallback must use maintainer (include_own_apps), consistent
        # with is_app_accessible — not created_by (is_created_by_me).
        params = AppListParams()
        AppAccessFilter(accessible_app_ids=set(), can_manage_own_apps=True).apply_to_params(params)
        assert params.accessible_app_ids == []
        assert params.include_own_apps is True
        assert params.is_created_by_me is None

    def test_empty_set_without_manage_sees_nothing(self):
        params = AppListParams()
        AppAccessFilter(accessible_app_ids=set(), can_manage_own_apps=False).apply_to_params(params)
        assert params.accessible_app_ids == []
        assert params.include_own_apps is False
        assert params.is_created_by_me is None


class TestResolveAppAccessFilter:
    def _patch_whitelist(self, monkeypatch: pytest.MonkeyPatch, whitelist: ResourceWhitelistResources) -> None:
        monkeypatch.setattr(
            f"{_RBAC_MODULE}.RBACService.AppAccess.whitelist_resources",
            lambda tenant_id, account_id: whitelist,
        )

    def test_default_preview_is_unrestricted(self, monkeypatch: pytest.MonkeyPatch):
        self._patch_whitelist(monkeypatch, ResourceWhitelistResources(unrestricted=True))
        permissions = _permissions(app_default_keys=["app.preview"])

        flt = resolve_app_access_filter("tenant-1", "acc-1", permissions=permissions)

        assert flt.accessible_app_ids is None
        assert flt.can_manage_own_apps is False

    def test_default_preview_overrides_whitelist_restriction(self, monkeypatch: pytest.MonkeyPatch):
        self._patch_whitelist(monkeypatch, ResourceWhitelistResources(unrestricted=False, resource_ids=["app-9"]))
        permissions = _permissions(
            workspace_keys=["app.full_access", "app.create_and_management"],
        )

        flt = resolve_app_access_filter("tenant-1", "acc-1", permissions=permissions)

        # Workspace-level preview grant defeats the whitelist restriction.
        assert flt.accessible_app_ids is None
        assert flt.can_manage_own_apps is True

    def test_override_apps_collected_without_default_preview(self, monkeypatch: pytest.MonkeyPatch):
        self._patch_whitelist(monkeypatch, ResourceWhitelistResources(unrestricted=True))
        permissions = _permissions(
            app_overrides=[
                ResourcePermissionKeys(resource_id="app-1", permission_keys=["app.preview"]),
                ResourcePermissionKeys(resource_id="app-2", permission_keys=["app.export"]),
            ],
        )

        flt = resolve_app_access_filter("tenant-1", "acc-1", permissions=permissions)

        assert flt.accessible_app_ids == {"app-1"}

    def test_whitelist_union_with_override_apps(self, monkeypatch: pytest.MonkeyPatch):
        self._patch_whitelist(monkeypatch, ResourceWhitelistResources(unrestricted=False, resource_ids=["app-5"]))
        permissions = _permissions(
            app_overrides=[ResourcePermissionKeys(resource_id="app-1", permission_keys=["app.acl.preview"])],
        )

        flt = resolve_app_access_filter("tenant-1", "acc-1", permissions=permissions)

        assert flt.accessible_app_ids == {"app-1", "app-5"}

    def test_fetches_permissions_when_not_supplied(self, monkeypatch: pytest.MonkeyPatch):
        self._patch_whitelist(monkeypatch, ResourceWhitelistResources(unrestricted=False, resource_ids=[]))
        monkeypatch.setattr(
            f"{_RBAC_MODULE}.RBACService.MyPermissions.get",
            lambda tenant_id, account_id: _permissions(workspace_keys=["app.create_and_management"]),
        )

        flt = resolve_app_access_filter("tenant-1", "acc-1")

        assert flt.accessible_app_ids == set()
        assert flt.can_manage_own_apps is True