-- =====================================================
-- 快速修复视图策略错误
-- 解决 "is not a table" 错误
-- =====================================================

-- 删除可能错误创建在视图上的策略
DO $$
DECLARE
    r RECORD;
BEGIN
    RAISE NOTICE '🧹 检查并删除视图上的错误策略';
    
    -- 尝试删除可能错误创建在视图上的策略
    -- 注意：这些命令可能会失败，但不会影响系统
    BEGIN
        DROP POLICY IF EXISTS "Users can view role info with restrictions" ON public.user_roles_with_email;
        RAISE NOTICE '  删除了视图策略: user_roles_with_email';
    EXCEPTION WHEN OTHERS THEN
        RAISE NOTICE '  视图策略不存在或已删除: user_roles_with_email';
    END;
    
    -- 检查其他可能的视图策略
    FOR r IN 
        SELECT schemaname, tablename, policyname 
        FROM pg_policies 
        WHERE schemaname = 'public' 
        AND tablename IN (
            SELECT table_name 
            FROM information_schema.views 
            WHERE table_schema = 'public'
        )
    LOOP
        BEGIN
            EXECUTE format('DROP POLICY IF EXISTS %I ON %I.%I', 
                          r.policyname, r.schemaname, r.tablename);
            RAISE NOTICE '  删除了视图策略: %.%', r.tablename, r.policyname;
        EXCEPTION WHEN OTHERS THEN
            RAISE NOTICE '  无法删除策略: %.%', r.tablename, r.policyname;
        END;
    END LOOP;
    
    RAISE NOTICE '✅ 视图策略清理完成';
END $$;

-- 确保视图存在且正确
DO $$
BEGIN
    RAISE NOTICE '🔍 检查视图状态';
    
    -- 重新创建视图（如果需要）
    DROP VIEW IF EXISTS public.user_roles_with_email CASCADE;
    
    CREATE OR REPLACE VIEW public.user_roles_with_email AS
    SELECT 
        ur.id,
        ur.user_id,
        ur.role,
        ur.class_id,
        ur.school_id,
        ur.created_at,
        ur.updated_at,
        au.email,
        au.raw_user_meta_data->>'user_role' as metadata_role,
        CASE 
            WHEN ur.role = au.raw_user_meta_data->>'user_role' THEN true
            ELSE false
        END as role_synced
    FROM public.user_roles ur
    LEFT JOIN auth.users au ON au.id = ur.user_id;
    
    RAISE NOTICE '✅ 视图重建完成';
END $$;

-- 验证系统状态
DO $$
DECLARE
    view_count INTEGER;
    table_count INTEGER;
    policy_count INTEGER;
BEGIN
    RAISE NOTICE '🔍 验证系统状态';
    
    -- 检查视图
    SELECT COUNT(*) INTO view_count
    FROM information_schema.views
    WHERE table_schema = 'public'
    AND table_name = 'user_roles_with_email';
    
    -- 检查表
    SELECT COUNT(*) INTO table_count
    FROM information_schema.tables
    WHERE table_schema = 'public'
    AND table_name = 'user_roles';
    
    -- 检查策略（应该只在表上，不在视图上）
    SELECT COUNT(*) INTO policy_count
    FROM pg_policies
    WHERE schemaname = 'public'
    AND tablename = 'user_roles';
    
    RAISE NOTICE '📊 系统状态:';
    RAISE NOTICE '  - user_roles_with_email 视图: %', 
                 CASE WHEN view_count > 0 THEN '存在' ELSE '不存在' END;
    RAISE NOTICE '  - user_roles 表: %', 
                 CASE WHEN table_count > 0 THEN '存在' ELSE '不存在' END;
    RAISE NOTICE '  - user_roles 表策略数量: %', policy_count;
    
    IF view_count > 0 AND table_count > 0 THEN
        RAISE NOTICE '🎉 系统状态正常！';
    ELSE
        RAISE NOTICE '⚠️ 系统可能需要重新初始化';
    END IF;
END $$;

-- 完成消息
SELECT 
    '✅ 视图策略错误已修复' as status,
    '视图不支持RLS策略，权限由底层表控制' as message;