//! RBAC Database Backend tests
//!
//! Tests for database-backed role and permission management

// ============================================================================
// Test 1: Database Connection & Schema
// ============================================================================

/// Test database connection to RBAC schema
#[test]
fn test_db_connection_success() {
    // Should connect to database and verify RBAC tables exist
    // Tables: roles, permissions, role_permissions, user_roles
}

/// Test RBAC schema initialization
#[test]
fn test_rbac_schema_initialization() {
    // Should create tables if they don't exist:
    // - roles (id UUID, name VARCHAR, description TEXT, tenant_id UUID, created_at, updated_at)
    // - permissions (id UUID, resource VARCHAR, action VARCHAR, description TEXT, created_at)
    // - role_permissions (role_id UUID, permission_id UUID)
    // - user_roles (user_id VARCHAR, role_id UUID, tenant_id UUID, assigned_at)
}

/// Test database indexes are created
#[test]
fn test_database_indexes_created() {
    // Should create indexes on:
    // - roles(tenant_id, name) - for multi-tenancy and uniqueness
    // - permissions(resource, action) - for uniqueness
    // - role_permissions(role_id) - for role lookups
    // - user_roles(user_id, tenant_id) - for user queries
    // - user_roles(role_id) - for role assignment queries
}

// ============================================================================
// Test 2: Role Persistence
// ============================================================================

/// Test creating and retrieving role from database
#[test]
fn test_create_and_retrieve_role() {
    // Should insert role and retrieve with all fields
    // UUID should be auto-generated
    // created_at and updated_at should be set
}

/// Test role uniqueness by tenant and name
#[test]
fn test_role_uniqueness_per_tenant() {
    // Same role name should be allowed in different tenants
    // Same role name in same tenant should fail (409 Conflict)
}

/// Test updating role details
#[test]
fn test_update_role_details() {
    // Should update name, description
    // Should update updated_at timestamp
    // Should not affect permissions unless explicitly changed
}

/// Test soft delete role (mark as deleted)
#[test]
fn test_soft_delete_role() {
    // Should not physically delete role (might have historical references)
    // Should mark deleted and exclude from queries
    // Or physically delete if safe (no active assignments)
}

/// Test retrieving all roles for a tenant
#[test]
fn test_list_roles_by_tenant() {
    // Should return only roles for specified tenant
    // Should support pagination (limit, offset)
    // Should be sorted consistently (by created_at DESC)
}

// ============================================================================
// Test 3: Permission Persistence
// ============================================================================

/// Test creating and retrieving permission from database
#[test]
fn test_create_and_retrieve_permission() {
    // Should insert permission with resource:action
    // Should auto-generate UUID
    // Should set created_at timestamp
}

/// Test permission uniqueness
#[test]
fn test_permission_uniqueness() {
    // Same resource:action should fail (409 Conflict)
    // Different resources/actions should succeed
}

/// Test listing permissions with filtering
#[test]
fn test_list_permissions_with_filters() {
    // Should filter by resource (e.g., "query" permissions)
    // Should support pagination
    // Should return consistent ordering
}

/// Test deleting permission only if unused
#[test]
fn test_delete_permission_checks_usage() {
    // Should fail if permission is assigned to any role
    // Should succeed if permission is unused
}

// ============================================================================
// Test 4: Role-Permission Relationships
// ============================================================================

/// Test adding permission to role
#[test]
fn test_add_permission_to_role() {
    // Should create entry in role_permissions table
    // Should be idempotent (adding twice doesn't duplicate)
}

/// Test removing permission from role
#[test]
fn test_remove_permission_from_role() {
    // Should delete entry from role_permissions
    // Should succeed even if permission not in role (no error)
}

/// Test listing role permissions
#[test]
fn test_get_role_permissions() {
    // Should return all PermissionDto objects for role
    // Should include resource, action, description
}

/// Test updating role permissions (replace all)
#[test]
fn test_update_role_permissions() {
    // Should replace all permissions for role
    // Should remove old, add new atomically
}

// ============================================================================
// Test 5: User-Role Assignment
// ============================================================================

/// Test assigning role to user
#[test]
fn test_assign_role_to_user() {
    // Should create entry in user_roles table
    // Should store tenant_id for multi-tenancy
    // Should record assigned_at timestamp
}

/// Test assignment prevents duplicates
#[test]
fn test_prevent_duplicate_role_assignment() {
    // Assigning same role to same user twice should fail (409)
    // Should be composite unique constraint (user_id, role_id, tenant_id)
}

/// Test revoking role from user
#[test]
fn test_revoke_role_from_user() {
    // Should delete entry from user_roles table
}

/// Test getting user roles
#[test]
fn test_get_user_roles() {
    // Should return all RoleDto for user in tenant
    // Should include role names and permissions
}

/// Test getting users with role
#[test]
fn test_get_users_with_role() {
    // Should return all user IDs assigned to role in tenant
}

// ============================================================================
// Test 6: Multi-Tenancy Database Isolation
// ============================================================================

/// Test roles isolated by tenant
#[test]
fn test_role_isolation_by_tenant() {
    // Tenant A's roles should not appear in Tenant B's queries
    // Should use tenant_id in WHERE clauses
}

/// Test permissions are global (not tenant-specific)
#[test]
fn test_permissions_are_global() {
    // Permissions should be shared across all tenants
    // No tenant_id in permissions table
}

/// Test user-role assignment tenant filtering
#[test]
fn test_user_role_tenant_filtering() {
    // Should filter by tenant_id in queries
    // Same user can have different roles in different tenants
}

/// Test cannot assign cross-tenant roles
#[test]
fn test_prevent_cross_tenant_assignment() {
    // Should fail if assigning role from Tenant A to user in Tenant B
    // Check should happen in database constraints
}

// ============================================================================
// Test 7: Transactions & Atomicity
// ============================================================================

/// Test atomic role creation with permissions
#[test]
fn test_atomic_role_creation_with_permissions() {
    // Creating role with initial permissions should be atomic
    // If permission assignment fails, whole transaction fails
}

/// Test atomic role deletion with cleanup
#[test]
fn test_atomic_role_deletion_cleanup() {
    // Deleting role should atomically remove:
    // - role_permissions entries
    // - potentially user_roles entries
    // All or nothing
}

/// Test concurrent assignments don't race
#[test]
fn test_concurrent_assignment_thread_safety() {
    // Multiple concurrent assignments to same user should work
    // Should not create duplicate entries
}

// ============================================================================
// Test 8: Query Performance
// ============================================================================

/// Test role listing with 1000+ roles performs well
#[test]
fn test_list_large_role_set_performance() {
    // Should complete within reasonable time (< 100ms)
    // Should use indexes on tenant_id
}

/// Test permission listing with 1000+ permissions
#[test]
fn test_list_large_permission_set_performance() {
    // Should complete within reasonable time
    // Should use indexes efficiently
}

/// Test getting user roles with many role assignments
#[test]
fn test_get_user_roles_with_many_assignments() {
    // Should efficiently join user_roles with roles table
    // Should include permissions via role_permissions
}

// ============================================================================
// Test 9: Audit Trail Integration
// ============================================================================

/// Test role creation creates audit event
#[test]
fn test_role_creation_audited() {
    // Should create AuditEvent in audit_log
    // Event type: "role_create"
    // Should include role details in before_state (empty) and after_state
}

/// Test role update creates audit event
#[test]
fn test_role_update_audited() {
    // Should create AuditEvent with old and new values
    // Event type: "role_update"
}

/// Test role deletion creates audit event
#[test]
fn test_role_deletion_audited() {
    // Should create AuditEvent showing deleted role
    // Event type: "role_delete"
}

/// Test permission assignment audited
#[test]
fn test_permission_assignment_audited() {
    // Both adding to role and assigning to user should be audited
}

// ============================================================================
// Test 10: Data Integrity & Constraints
// ============================================================================

/// Test cannot delete role with active assignments
#[test]
fn test_cannot_delete_active_role() {
    // Foreign key constraint should prevent deletion
    // Or application-level check should refuse
}

/// Test cannot delete permission with active assignments
#[test]
fn test_cannot_delete_active_permission() {
    // Foreign key constraint prevents deletion
}

/// Test role name not null
#[test]
fn test_role_name_required() {
    // Should fail with NULL name
}

/// Test permission resource and action not null
#[test]
fn test_permission_fields_required() {
    // Both resource and action must be NOT NULL
}

// ============================================================================
// Test 11: Edge Cases & Error Recovery
// ============================================================================

/// Test handling concurrent updates to same role
#[test]
fn test_concurrent_role_updates() {
    // Should serialize updates properly
    // Last write should win or use optimistic locking
}

/// Test recovery from database connection loss
#[test]
fn test_connection_pool_recovery() {
    // Should reconnect automatically
    // Should not block requests indefinitely
}

/// Test transaction rollback on permission denied
#[test]
fn test_transaction_rollback_on_error() {
    // If any step fails, entire transaction rolls back
    // Database should return to consistent state
}

/// Test handling very long role/permission names
#[test]
fn test_long_strings_handling() {
    // Should handle maximum field lengths gracefully
    // Should truncate or reject too-long strings
}

/// Test special characters in names
#[test]
fn test_special_characters_in_names() {
    // Should handle Unicode, spaces, quotes safely
    // Should prevent SQL injection
}
