-- 1. 创建分销等级表
CREATE TABLE IF NOT EXISTS public.ak_distribution_level (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    name TEXT NOT NULL,                         -- 等级名称
    level INTEGER NOT NULL UNIQUE,              -- 等级权重/数字（如1, 2, 3）
    percent1 DECIMAL(10,2) DEFAULT 0,           -- 一级分佣比例 (%)
    percent2 DECIMAL(10,2) DEFAULT 0,           -- 二级分佣比例 (%)
    task_total INTEGER DEFAULT 0,               -- 任务总数
    task_finish INTEGER DEFAULT 0,              -- 需完成数量（升级门槛）
    is_visible BOOLEAN DEFAULT true,            -- 是否显示
    created_at TIMESTAMPTZ DEFAULT now(),
    updated_at TIMESTAMPTZ DEFAULT now()
);

-- 2. 启用 RLS
ALTER TABLE public.ak_distribution_level ENABLE ROW LEVEL SECURITY;

-- 3. 创建权限策略
-- 允许所有认证用户查看等级（用于前端展示）
CREATE POLICY "Anyone can view levels" 
ON public.ak_distribution_level FOR SELECT 
TO authenticated
USING (true);

-- 仅允许 Admin 进行管理 (INSERT/UPDATE/DELETE)
CREATE POLICY "Admins can manage levels" 
ON public.ak_distribution_level FOR ALL 
TO authenticated
USING (
  EXISTS (
    SELECT 1 FROM public.ak_users 
    WHERE auth_id = auth.uid() AND role = 'admin'
  )
)
WITH CHECK (
  EXISTS (
    SELECT 1 FROM public.ak_users 
    WHERE auth_id = auth.uid() AND role = 'admin'
  )
);

-- 4. 插入初始化示例数据
INSERT INTO public.ak_distribution_level (name, level, percent1, percent2, is_visible) 
VALUES ('普通分销员', 1, 10.00, 5.00, true)
ON CONFLICT (level) DO NOTHING;