-- =============================================
-- 优惠券分析测试数据 Seed（至少 20 条样本）
-- 说明：
-- - 依赖表：coupon_templates, user_coupons, coupon_usage_logs, users, merchants, orders
-- - 用于驱动 /pages/mall/analytics/coupon-analysis.uvue 页面联调
-- - 设计目标：
--     - 8 种券类型覆盖（满减/折扣/免运费/新人/会员/品类/商家/限时）
--     - 6 种发放渠道覆盖（manual/auto/campaign/invite/cs/points）
--     - 最近 30 天有发放 + 使用 + 未使用 + 即将到期券
-- - 可重复执行：通过 WHERE NOT EXISTS / 固定模板名称 避免重复插入
-- =============================================

-- 1) 准备一个测试商家（如不存在则创建）
INSERT INTO public.merchants (id, shop_name, created_at)
SELECT
  '30000000-0000-0000-0000-000000000001'::uuid,
  '优惠券测试商家',
  now() - interval '60 days'
WHERE NOT EXISTS (
  SELECT 1 FROM public.merchants WHERE id = '30000000-0000-0000-0000-000000000001'
);

-- 2) 准备 3 个测试用户（如不存在则创建）
INSERT INTO public.users (id, phone, email, nickname, created_at)
VALUES
  ('40000000-0000-0000-0000-000000000001'::uuid, '13900001001', 'coupon_user1@test.com', '券用户1', now() - interval '30 days'),
  ('40000000-0000-0000-0000-000000000002'::uuid, '13900001002', 'coupon_user2@test.com', '券用户2', now() - interval '20 days'),
  ('40000000-0000-0000-0000-000000000003'::uuid, '13900001003', 'coupon_user3@test.com', '券用户3', now() - interval '10 days')
ON CONFLICT (id) DO NOTHING;

-- 3) 插入 8 个优惠券模板（覆盖 mall.md 的 8 种类型）
INSERT INTO public.coupon_templates (
  id, name, description, coupon_type, discount_type, discount_value,
  min_order_amount, max_discount_amount, total_quantity, per_user_limit,
  usage_limit, merchant_id, start_time, end_time, status, created_at
)
VALUES
  ('50000000-0000-0000-0000-000000000001'::uuid, '满100减20', '满100减20元', 1, 1, 20.00, 100.00, NULL, 1000, 3, 1,
    '30000000-0000-0000-0000-000000000001', now() - interval '30 days', now() + interval '30 days', 1, now() - interval '30 days'),
  ('50000000-0000-0000-0000-000000000002'::uuid, '9折优惠券', '全场9折', 2, 2, 9.00, 0.00, 50.00, 1000, 3, 1,
    '30000000-0000-0000-0000-000000000001', now() - interval '30 days', now() + interval '30 days', 1, now() - interval '30 days'),
  ('50000000-0000-0000-0000-000000000003'::uuid, '免运费券', '免配送费', 3, 3, 0.00, 0.00, 10.00, 1000, 5, 1,
    '30000000-0000-0000-0000-000000000001', now() - interval '30 days', now() + interval '30 days', 1, now() - interval '30 days'),
  ('50000000-0000-0000-0000-000000000004'::uuid, '新人专享满50减25', '新用户首单优惠', 4, 1, 25.00, 50.00, NULL, 500, 1, 1,
    '30000000-0000-0000-0000-000000000001', now() - interval '15 days', now() + interval '45 days', 1, now() - interval '15 days'),
  ('50000000-0000-0000-0000-000000000005'::uuid, '会员折扣券', '会员专享8.5折', 5, 2, 8.50, 0.00, 80.00, 500, 5, 1,
    '30000000-0000-0000-0000-000000000001', now() - interval '20 days', now() + interval '40 days', 1, now() - interval '20 days'),
  ('50000000-0000-0000-0000-000000000006'::uuid, '生鲜品类券', '生鲜类满60减15', 6, 1, 15.00, 60.00, NULL, 500, 3, 1,
    '30000000-0000-0000-0000-000000000001', now() - interval '25 days', now() + interval '35 days', 1, now() - interval '25 days'),
  ('50000000-0000-0000-0000-000000000007'::uuid, '商家专属券', '指定商家满80减30', 7, 1, 30.00, 80.00, NULL, 300, 3, 1,
    '30000000-0000-0000-0000-000000000001', now() - interval '10 days', now() + interval '50 days', 1, now() - interval '10 days'),
  ('50000000-0000-0000-0000-000000000008'::uuid, '限时秒杀券', '限时满40减10', 8, 1, 10.00, 40.00, NULL, 300, 2, 1,
    '30000000-0000-0000-0000-000000000001', now() - interval '5 days', now() + interval '10 days', 1, now() - interval '5 days')
ON CONFLICT (id) DO NOTHING;


-- 4) 生成用户优惠券 + 使用数据
DO $$
DECLARE
  v_users   uuid[] := ARRAY[
    '40000000-0000-0000-0000-000000000001'::uuid,
    '40000000-0000-0000-0000-000000000002'::uuid,
    '40000000-0000-0000-0000-000000000003'::uuid
  ];
  v_templates uuid[] := ARRAY[
    '50000000-0000-0000-0000-000000000001'::uuid,
    '50000000-0000-0000-0000-000000000002'::uuid,
    '50000000-0000-0000-0000-000000000003'::uuid,
    '50000000-0000-0000-0000-000000000004'::uuid,
    '50000000-0000-0000-0000-000000000005'::uuid,
    '50000000-0000-0000-0000-000000000006'::uuid,
    '50000000-0000-0000-0000-000000000007'::uuid,
    '50000000-0000-0000-0000-000000000008'::uuid
  ];
  v_channels text[] := ARRAY['manual','auto','campaign','invite','cs','points'];

  i int;
  j int;
  v_uc_id uuid;
  v_user uuid;
  v_tpl uuid;
  v_channel text;
  v_received_at timestamptz;
  v_expire_at timestamptz;
  v_order_id uuid;
  v_order_amount numeric;
  v_discount_amount numeric;
  v_used_at timestamptz;
BEGIN
  -- 为最近 30 天生成多条券（部分使用，部分未使用，部分即将到期）
  FOR i IN 0..29 LOOP
    -- 当天发放 2~4 条券
    FOR j IN 1..(2 + (i % 3)) LOOP
      v_user    := v_users[1 + (i + j) % array_length(v_users, 1)];
      v_tpl     := v_templates[1 + (i + j) % array_length(v_templates, 1)];
      v_channel := v_channels[1 + (i + j) % array_length(v_channels, 1)];

      v_received_at := (now() - (i || ' days')::interval);
      v_expire_at   := v_received_at + interval '20 days';

      -- 通过 coupon_code 幂等插入，并返回最终 id（避免 ON CONFLICT DO NOTHING 导致 v_uc_id 无对应记录）
      INSERT INTO public.user_coupons (
        id, user_id, template_id, coupon_code, status,
        received_at, expire_at, obtain_channel, merchant_id
      ) VALUES (
        gen_random_uuid(),
        v_user,
        v_tpl,
        'TESTCOUPON-' || i || '-' || j,
        1, -- 初始未使用
        v_received_at,
        v_expire_at,
        v_channel,
        '30000000-0000-0000-0000-000000000001'::uuid
      )
      ON CONFLICT (coupon_code) DO UPDATE
        SET user_id       = EXCLUDED.user_id,
            template_id   = EXCLUDED.template_id,
            received_at   = EXCLUDED.received_at,
            expire_at     = EXCLUDED.expire_at,
            obtain_channel= EXCLUDED.obtain_channel,
            merchant_id   = EXCLUDED.merchant_id
      RETURNING id INTO v_uc_id;

      -- 约一半的券会在 0~10 天内被使用，生成对应订单和使用记录
      IF (i + j) % 2 = 0 THEN
        v_order_id := gen_random_uuid();
        v_order_amount := 50 + (10 * ((i + j) % 5));  -- 50~90 的订单金额
        v_discount_amount := CASE
          WHEN (i + j) % 4 = 0 THEN 10
          WHEN (i + j) % 4 = 1 THEN 15
          WHEN (i + j) % 4 = 2 THEN 20
          ELSE 5
        END;
        v_used_at := v_received_at + ( (1 + (i % 5)) || ' days')::interval;

        -- 插入订单
        INSERT INTO public.orders (
          id, user_id, merchant_id, total_amount, status, created_at, updated_at
        ) VALUES (
          v_order_id,
          v_user,
          '30000000-0000-0000-0000-000000000001'::uuid,
          v_order_amount,
          2, -- 已完成
          v_used_at,
          v_used_at
        )
        ON CONFLICT (id) DO NOTHING;

        -- 更新 user_coupons 为已使用（确认对应记录存在）
        UPDATE public.user_coupons
        SET status = 2,
            used_at = v_used_at,
            order_id = v_order_id
        WHERE id = v_uc_id;

        -- 插入使用流水（仅当对应 user_coupon 存在时生效）
        INSERT INTO public.coupon_usage_logs (
          id, user_coupon_id, order_id, discount_amount, used_at,
          user_id, template_id, merchant_id, order_amount, created_at
        ) VALUES (
          gen_random_uuid(),
          v_uc_id,
          v_order_id,
          v_discount_amount,
          v_used_at,
          v_user,
          v_tpl,
          '30000000-0000-0000-0000-000000000001'::uuid,
          v_order_amount,
          v_used_at
        );
      END IF;
    END LOOP;
  END LOOP;
END;
$$;

-- 完成
SELECT 'coupon test data seed completed!' AS message;