from uuid import uuid4
from app_new.extensions import db
from app_new.core.models import User, Role, Permission, RolePermission, UserPermission, UserRole
from app_new.core.authorization import has_permission
from app_new.core.services.rbac import replace_user_roles


def _role_with_permissions(slug, permissions):
    role = Role(slug=slug, name=slug, is_system=False, is_active=True)
    db.session.add(role)
    db.session.flush()
    for code in permissions:
        permission = Permission.query.filter_by(code=code).first()
        if permission is None:
            permission = Permission(code=code, name=code, module=code.split('.', 1)[0], action=code.split('.', 1)[1])
            db.session.add(permission)
            db.session.flush()
        db.session.add(RolePermission(role_id=role.id, permission_id=permission.id, effect='allow'))
    return role


def _user():
    user = User(username='multi_' + uuid4().hex[:10], email=uuid4().hex + '@test.local', full_name='Multi', role='demandeur')
    user.set_password('test-password-strong')
    db.session.add(user)
    db.session.flush()
    return user


def test_multiple_roles_union_and_removal(app):
    with app.app_context():
        role_a = _role_with_permissions('role_a_' + uuid4().hex[:8], ['patrimoine.view'])
        role_b = _role_with_permissions('role_b_' + uuid4().hex[:8], ['prevention.view'])
        role_c = _role_with_permissions('role_c_' + uuid4().hex[:8], ['stock.manage'])
        user = _user()
        replace_user_roles(user, [role_a.id, role_b.id, role_c.id])
        db.session.commit()
        assert has_permission('patrimoine.view', user)
        assert has_permission('prevention.view', user)
        assert has_permission('stock.manage', user)
        replace_user_roles(user, [role_b.id, role_c.id])
        db.session.commit()
        assert not has_permission('patrimoine.view', user)
        assert has_permission('prevention.view', user)
        assert has_permission('stock.manage', user)


def test_admin_removed_keeps_other_roles_without_wildcard(app):
    with app.app_context():
        admin = Role.query.filter_by(slug='admin', is_active=True).first()
        tech = Role.query.filter_by(slug='technicien', is_active=True).first()
        prevention = Role.query.filter_by(slug='assistant_prevention', is_active=True).first()
        user = _user()
        replace_user_roles(user, [admin.id, tech.id, prevention.id])
        db.session.commit()
        assert has_permission('*', user)
        replace_user_roles(user, [tech.id, prevention.id])
        db.session.commit()
        assert not has_permission('*', user)
        assert has_permission('patrimoine.view', user)
        assert has_permission('prevention.view', user)


def test_individual_deny_overrides_all_roles_and_allow_adds(app):
    with app.app_context():
        role_a = _role_with_permissions('deny_a_' + uuid4().hex[:8], ['stock.manage'])
        role_b = _role_with_permissions('deny_b_' + uuid4().hex[:8], ['stock.view'])
        user = _user()
        replace_user_roles(user, [role_a.id, role_b.id])
        db.session.commit()
        permission = Permission.query.filter_by(code='stock.manage').first()
        db.session.add(UserPermission(user_id=user.id, permission_id=permission.id, effect='deny'))
        extra = Permission(code='audit.test.view_' + uuid4().hex[:6], name='audit test', module='audit', action='view')
        db.session.add(extra)
        db.session.flush()
        db.session.add(UserPermission(user_id=user.id, permission_id=extra.id, effect='allow'))
        db.session.commit()
        assert not has_permission('stock.manage', user)
        assert has_permission(extra.code, user)


def test_inactive_role_is_ignored_and_no_duplicate_links(app):
    with app.app_context():
        code = 'system.test.view_' + uuid4().hex[:6]
        role = _role_with_permissions('inactive_' + uuid4().hex[:8], [code])
        role.is_active = False
        user = _user()
        replace_user_roles(user, [role.id, role.id])
        replace_user_roles(user, [role.id])
        db.session.commit()
        assert not has_permission(code, user)
        assert UserRole.query.filter_by(user_id=user.id, role_id=role.id).count() == 0


def test_rbac_errors_fail_closed(app, monkeypatch):
    with app.app_context():
        class BrokenUser:
            is_authenticated = True
            id = 999999
            @property
            def role_links(self):
                raise RuntimeError('database unavailable')
            @property
            def permission_links(self):
                return []
        assert not has_permission('dashboard.view', BrokenUser())

def test_custom_role_permission_and_override(app):
    with app.app_context():
        slug = "custom_" + uuid4().hex[:8]
        role = Role(slug=slug, name="Gestionnaire test", is_system=False)
        permission = Permission(code="stock.test.view", name="Stock test", module="stock", action="view")
        db.session.add_all([role, permission]); db.session.flush()
        db.session.add(RolePermission(role_id=role.id, permission_id=permission.id, effect="allow"))
        user = User(username="rbac_" + uuid4().hex[:8], email=uuid4().hex + "@test.local", full_name="RBAC", role=slug)
        user.set_password("test-password-strong")
        db.session.add(user); db.session.flush()
        db.session.add(UserRole(user_id=user.id, role_id=role.id)); db.session.commit()
        assert has_permission("stock.test.view", user)
        assert not has_permission("stock.test.edit", user)
        db.session.add(UserPermission(user_id=user.id, permission_id=permission.id, effect="deny"))
        db.session.commit()
        assert not has_permission("stock.test.view", user)

def test_admin_rbac_page_requires_authentication(client):
    response = client.get("/admin/roles")
    assert response.status_code == 302
    assert "/auth/login" in response.location