services/config/schema.sql

CREATE TABLE IF NOT EXISTS `categories` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `name` varchar(100) NOT NULL COMMENT '分类名称',
  `icon` varchar(50) DEFAULT NULL COMMENT '分类图标',
  `color` varchar(20) DEFAULT '#1890ff' COMMENT '分类颜色',
  `is_show` tinyint(1) DEFAULT 1 COMMENT '是否显示',
  `sort_order` int(11) DEFAULT 0 COMMENT '排序顺序',
  `created_at` timestamp DEFAULT CURRENT_TIMESTAMP,
  `updated_at` timestamp DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='商品分类表';

-- 兼容 MySQL < 8.0.29：基于 information_schema 判断后再 ALTER
SET @col_exists = (SELECT COUNT(*) FROM information_schema.COLUMNS WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'categories' AND COLUMN_NAME = 'color');
SET @sql = IF(@col_exists = 0, 'ALTER TABLE `categories` ADD COLUMN `color` varchar(20) DEFAULT ''#1890ff'' COMMENT ''分类颜色''', 'SELECT 1');
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;

CREATE TABLE IF NOT EXISTS `goods` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `name` varchar(200) NOT NULL COMMENT '商品名称',
  `price` decimal(10,2) NOT NULL COMMENT '售价',
  `original_price` decimal(10,2) DEFAULT NULL COMMENT '原价',
  `cost_price` decimal(10,2) DEFAULT 0 COMMENT '成本价',
  `unit` varchar(20) DEFAULT '件' COMMENT '单位',
  `category_id` int(11) DEFAULT NULL COMMENT '分类ID',
  `images` text COMMENT '图片JSON',
  `stock` int(11) DEFAULT 0 COMMENT '库存',
  `sales` int(11) DEFAULT 0 COMMENT '销量',
  `is_hot` tinyint(1) DEFAULT 0 COMMENT '是否热销',
  `is_new` tinyint(1) DEFAULT 0 COMMENT '是否新品',
  `pricing_type` tinyint(1) DEFAULT 1 COMMENT '定价类型 1-按件 2-按重量',
  `goods_no` varchar(64) DEFAULT '' COMMENT '商品货号',
  `barcode` varchar(64) DEFAULT '' COMMENT '商品条码',
  `is_on_sale` tinyint(1) DEFAULT 1 COMMENT '是否上架 1-上架 0-下架',
  `description` text COMMENT '商品描述',
  `remark` varchar(500) DEFAULT '' COMMENT '备注',
  `created_at` timestamp DEFAULT CURRENT_TIMESTAMP,
  `updated_at` timestamp DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`),
  KEY `category_id` (`category_id`),
  KEY `idx_barcode` (`barcode`),
  KEY `idx_goods_no` (`goods_no`),
  CONSTRAINT `goods_ibfk_1` FOREIGN KEY (`category_id`) REFERENCES `categories` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='商品表';

CREATE TABLE IF NOT EXISTS `users` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `phone` varchar(20) NOT NULL COMMENT '手机号',
  `password` varchar(255) NOT NULL COMMENT '密码(scrypt)',
  `name` varchar(100) DEFAULT NULL COMMENT '用户名',
  `avatar` varchar(255) DEFAULT NULL COMMENT '头像',
  `points` int(11) DEFAULT 0 COMMENT '积分',
  `role` tinyint(1) DEFAULT 0 COMMENT '角色 0-普通用户 1-店员 2-管理员',
  `status` tinyint(1) DEFAULT 1 COMMENT '状态 1-正常 0-禁用',
  `openid` varchar(100) DEFAULT NULL COMMENT '微信openid',
  `token` varchar(100) DEFAULT NULL COMMENT '登录token',
  `created_at` timestamp DEFAULT CURRENT_TIMESTAMP,
  `updated_at` timestamp DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`),
  UNIQUE KEY `phone` (`phone`),
  KEY `openid` (`openid`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='用户表';

CREATE TABLE IF NOT EXISTS `orders` (
  `id` varchar(50) NOT NULL COMMENT '订单号',
  `user_id` int(11) DEFAULT NULL COMMENT '用户ID',
  `status` varchar(20) DEFAULT 'pending' COMMENT '状态 pending-待支付 paid-已支付 completed-已完成 cancelled-已取消',
  `total_price` decimal(10,2) NOT NULL COMMENT '总价',
  `cart` text COMMENT '购物车数据JSON',
  `user_info` text COMMENT '用户信息JSON',
  `created_at` timestamp DEFAULT CURRENT_TIMESTAMP,
  `updated_at` timestamp DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`),
  KEY `user_id` (`user_id`),
  CONSTRAINT `orders_ibfk_1` FOREIGN KEY (`user_id`) REFERENCES `users` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='订单表';

CREATE TABLE IF NOT EXISTS `order_items` (
  `id` int NOT NULL AUTO_INCREMENT,
  `order_id` varchar(64) NOT NULL COMMENT '订单ID',
  `goods_id` int NOT NULL COMMENT '商品ID',
  `goods_name` varchar(255) NOT NULL COMMENT '商品名称',
  `price` decimal(10,2) NOT NULL COMMENT '单价',
  `quantity` int NOT NULL DEFAULT 1 COMMENT '数量',
  `weight` decimal(10,2) DEFAULT NULL COMMENT '称重(kg)',
  `subtotal` decimal(10,2) NOT NULL COMMENT '小计',
  `unit` varchar(20) DEFAULT '' COMMENT '单位',
  `created_at` timestamp DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`),
  KEY `order_id` (`order_id`),
  KEY `goods_id` (`goods_id`),
  CONSTRAINT `order_items_ibfk_1` FOREIGN KEY (`order_id`) REFERENCES `orders` (`id`) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='订单商品明细表';

CREATE TABLE IF NOT EXISTS `points_logs` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `user_id` int(11) NOT NULL COMMENT '用户ID',
  `type` varchar(20) COMMENT '类型 earn-获得 spend-消费',
  `amount` int(11) NOT NULL COMMENT '积分数量',
  `description` varchar(200) DEFAULT NULL COMMENT '描述',
  `created_at` timestamp DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`),
  KEY `user_id` (`user_id`),
  CONSTRAINT `points_logs_ibfk_1` FOREIGN KEY (`user_id`) REFERENCES `users` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='积分记录表';

CREATE TABLE IF NOT EXISTS `stock` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `goods_id` int(11) NOT NULL COMMENT '商品ID',
  `quantity` int(11) DEFAULT 0 COMMENT '库存数量',
  `warehouse` varchar(50) DEFAULT '默认仓库' COMMENT '仓库',
  `created_at` timestamp DEFAULT CURRENT_TIMESTAMP,
  `updated_at` timestamp DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`),
  UNIQUE KEY `goods_id` (`goods_id`),
  CONSTRAINT `stock_ibfk_1` FOREIGN KEY (`goods_id`) REFERENCES `goods` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='库存表';

CREATE TABLE IF NOT EXISTS `suppliers` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `name` varchar(200) NOT NULL COMMENT '供应商名称',
  `contact` varchar(100) DEFAULT '' COMMENT '联系人',
  `phone` varchar(20) DEFAULT '' COMMENT '联系电话',
  `address` varchar(500) DEFAULT '' COMMENT '地址',
  `created_at` timestamp DEFAULT CURRENT_TIMESTAMP,
  `updated_at` timestamp DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='供应商表';

CREATE TABLE IF NOT EXISTS `purchases` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `supplier_id` int(11) DEFAULT NULL COMMENT '供应商ID',
  `supplier_name` varchar(200) DEFAULT '' COMMENT '供应商名称（冗余）',
  `total` decimal(10,2) DEFAULT 0.00 COMMENT '采购总金额',
  `status` tinyint(4) DEFAULT 0 COMMENT '状态 0-待入库 1-已入库',
  `remarks` text COMMENT '备注',
  `created_at` timestamp DEFAULT CURRENT_TIMESTAMP,
  `updated_at` timestamp DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`),
  KEY `supplier_id` (`supplier_id`),
  CONSTRAINT `purchases_ibfk_1` FOREIGN KEY (`supplier_id`) REFERENCES `suppliers` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='采购单表';

CREATE TABLE IF NOT EXISTS `purchase_items` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `purchase_id` int(11) NOT NULL COMMENT '采购单ID',
  `goods_id` int(11) NOT NULL COMMENT '商品ID',
  `goods_name` varchar(200) DEFAULT '' COMMENT '商品名称（冗余）',
  `quantity` int(11) DEFAULT 0 COMMENT '采购数量',
  `purchase_price` decimal(10,2) DEFAULT 0.00 COMMENT '采购单价',
  `created_at` timestamp DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`),
  KEY `purchase_id` (`purchase_id`),
  KEY `goods_id` (`goods_id`),
  CONSTRAINT `purchase_items_ibfk_1` FOREIGN KEY (`purchase_id`) REFERENCES `purchases` (`id`) ON DELETE CASCADE,
  CONSTRAINT `purchase_items_ibfk_2` FOREIGN KEY (`goods_id`) REFERENCES `goods` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='采购单明细表';

CREATE TABLE IF NOT EXISTS `goods_specs` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `goods_id` int(11) NOT NULL COMMENT '商品ID',
  `spec_name` varchar(100) NOT NULL COMMENT '规格名称（如 330ml/500ml/1L）',
  `price` decimal(10,2) NOT NULL COMMENT '规格售价',
  `stock` int(11) DEFAULT 0 COMMENT '规格库存',
  `created_at` timestamp DEFAULT CURRENT_TIMESTAMP,
  `updated_at` timestamp DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`),
  KEY `goods_id` (`goods_id`),
  CONSTRAINT `goods_specs_ibfk_1` FOREIGN KEY (`goods_id`) REFERENCES `goods` (`id`) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='商品规格表';

CREATE TABLE IF NOT EXISTS `addresses` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `user_id` int(11) NOT NULL COMMENT '用户ID',
  `name` varchar(100) NOT NULL COMMENT '收货人姓名',
  `phone` varchar(20) NOT NULL COMMENT '联系电话',
  `region` varchar(200) DEFAULT '' COMMENT '地区',
  `detail` varchar(500) NOT NULL COMMENT '详细地址',
  `is_default` tinyint(1) DEFAULT 0 COMMENT '是否默认',
  `created_at` timestamp DEFAULT CURRENT_TIMESTAMP,
  `updated_at` timestamp DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`),
  KEY `user_id` (`user_id`),
  CONSTRAINT `addresses_ibfk_1` FOREIGN KEY (`user_id`) REFERENCES `users` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='收货地址表';

CREATE TABLE IF NOT EXISTS `points_goods` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `name` varchar(200) NOT NULL COMMENT '商品名称',
  `points` int(11) DEFAULT 0 COMMENT '所需积分',
  `stock` int(11) DEFAULT 0 COMMENT '库存',
  `image` varchar(500) DEFAULT '' COMMENT '图片',
  `description` text COMMENT '描述',
  `is_show` tinyint(4) DEFAULT 1 COMMENT '是否显示',
  `created_at` timestamp DEFAULT CURRENT_TIMESTAMP,
  `updated_at` timestamp DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='积分商品表';

-- 订单表索引：按状态筛选、按时间排序
SET @idx_exists = (SELECT COUNT(*) FROM information_schema.STATISTICS WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'orders' AND INDEX_NAME = 'idx_orders_status');
SET @sql = IF(@idx_exists = 0, 'ALTER TABLE `orders` ADD INDEX `idx_orders_status` (`status`)', 'SELECT 1');
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;
SET @idx_exists = (SELECT COUNT(*) FROM information_schema.STATISTICS WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'orders' AND INDEX_NAME = 'idx_orders_created_at');
SET @sql = IF(@idx_exists = 0, 'ALTER TABLE `orders` ADD INDEX `idx_orders_created_at` (`created_at`)', 'SELECT 1');
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;

-- 商品表索引：热销/新品筛选、名称搜索
SET @idx_exists = (SELECT COUNT(*) FROM information_schema.STATISTICS WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'goods' AND INDEX_NAME = 'idx_goods_is_hot');
SET @sql = IF(@idx_exists = 0, 'ALTER TABLE `goods` ADD INDEX `idx_goods_is_hot` (`is_hot`)', 'SELECT 1');
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;
SET @idx_exists = (SELECT COUNT(*) FROM information_schema.STATISTICS WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'goods' AND INDEX_NAME = 'idx_goods_is_new');
SET @sql = IF(@idx_exists = 0, 'ALTER TABLE `goods` ADD INDEX `idx_goods_is_new` (`is_new`)', 'SELECT 1');
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;
SET @idx_exists = (SELECT COUNT(*) FROM information_schema.STATISTICS WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'goods' AND INDEX_NAME = 'idx_goods_name');
SET @sql = IF(@idx_exists = 0, 'ALTER TABLE `goods` ADD INDEX `idx_goods_name` (`name`(100))', 'SELECT 1');
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;

-- 商品表新增上下架字段
SET @col_exists = (SELECT COUNT(*) FROM information_schema.COLUMNS WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'goods' AND COLUMN_NAME = 'is_on_sale');
SET @sql = IF(@col_exists = 0, 'ALTER TABLE `goods` ADD COLUMN `is_on_sale` tinyint(1) DEFAULT 1 COMMENT ''是否上架 1-上架 0-下架''', 'SELECT 1');
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;
SET @col_exists = (SELECT COUNT(*) FROM information_schema.COLUMNS WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'goods' AND COLUMN_NAME = 'cost_price');
SET @sql = IF(@col_exists = 0, 'ALTER TABLE `goods` ADD COLUMN `cost_price` decimal(10,2) DEFAULT 0.00 COMMENT ''进价''', 'SELECT 1');
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;

-- 商品表全文索引：关键词搜索加速 (MySQL 5.7+/8.0)
-- 注意：FULLTEXT 需 MyISAM 或 InnoDB 5.6+；若不支持会被忽略
SET @idx_exists = (SELECT COUNT(*) FROM information_schema.STATISTICS WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'goods' AND INDEX_NAME = 'ft_goods_name_desc');
SET @sql = IF(@idx_exists = 0, 'ALTER TABLE `goods` ADD FULLTEXT INDEX `ft_goods_name_desc` (`name`, `description`)', 'SELECT 1');
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;

-- 分类表索引：按排序字段排序
SET @idx_exists = (SELECT COUNT(*) FROM information_schema.STATISTICS WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'categories' AND INDEX_NAME = 'idx_categories_sort_order');
SET @sql = IF(@idx_exists = 0, 'ALTER TABLE `categories` ADD INDEX `idx_categories_sort_order` (`sort_order`)', 'SELECT 1');
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;

-- 积分记录表索引：按类型筛选
SET @idx_exists = (SELECT COUNT(*) FROM information_schema.STATISTICS WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'points_logs' AND INDEX_NAME = 'idx_points_logs_type');
SET @sql = IF(@idx_exists = 0, 'ALTER TABLE `points_logs` ADD INDEX `idx_points_logs_type` (`type`)', 'SELECT 1');
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;

-- 采购单表索引：按状态筛选、按时间排序
SET @idx_exists = (SELECT COUNT(*) FROM information_schema.STATISTICS WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'purchases' AND INDEX_NAME = 'idx_purchases_status');
SET @sql = IF(@idx_exists = 0, 'ALTER TABLE `purchases` ADD INDEX `idx_purchases_status` (`status`)', 'SELECT 1');
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;
SET @idx_exists = (SELECT COUNT(*) FROM information_schema.STATISTICS WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'purchases' AND INDEX_NAME = 'idx_purchases_created_at');
SET @sql = IF(@idx_exists = 0, 'ALTER TABLE `purchases` ADD INDEX `idx_purchases_created_at` (`created_at`)', 'SELECT 1');
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;

-- 购物车表
CREATE TABLE IF NOT EXISTS `carts` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `user_id` int(11) NOT NULL COMMENT '用户ID',
  `goods_id` int(11) NOT NULL COMMENT '商品ID',
  `quantity` int(11) NOT NULL DEFAULT 1 COMMENT '数量',
  `weight` decimal(10,2) DEFAULT NULL COMMENT '称重(kg)',
  `selected` tinyint(1) DEFAULT 1 COMMENT '是否选中',
  `created_at` timestamp DEFAULT CURRENT_TIMESTAMP,
  `updated_at` timestamp DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`),
  UNIQUE KEY `user_goods` (`user_id`, `goods_id`),
  KEY `user_id` (`user_id`),
  KEY `goods_id` (`goods_id`),
  CONSTRAINT `carts_ibfk_1` FOREIGN KEY (`user_id`) REFERENCES `users` (`id`) ON DELETE CASCADE,
  CONSTRAINT `carts_ibfk_2` FOREIGN KEY (`goods_id`) REFERENCES `goods` (`id`) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='购物车表';

-- 购物车表索引
SET @idx_exists = (SELECT COUNT(*) FROM information_schema.STATISTICS WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'carts' AND INDEX_NAME = 'idx_carts_user_id');
SET @sql = IF(@idx_exists = 0, 'ALTER TABLE `carts` ADD INDEX `idx_carts_user_id` (`user_id`)', 'SELECT 1');
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;
SET @idx_exists = (SELECT COUNT(*) FROM information_schema.STATISTICS WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'carts' AND INDEX_NAME = 'idx_carts_selected');
SET @sql = IF(@idx_exists = 0, 'ALTER TABLE `carts` ADD INDEX `idx_carts_selected` (`selected`)', 'SELECT 1');
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;

-- 退款表
CREATE TABLE IF NOT EXISTS `refunds` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `order_id` varchar(50) NOT NULL COMMENT '订单ID',
  `user_id` int(11) NOT NULL COMMENT '用户ID',
  `type` tinyint(1) DEFAULT 1 COMMENT '退款类型 1-仅退款 2-退货退款',
  `reason` varchar(500) NOT NULL COMMENT '退款原因',
  `amount` decimal(10,2) NOT NULL COMMENT '退款金额',
  `status` tinyint(1) DEFAULT 0 COMMENT '状态 0-待处理 1-已通过 2-已拒绝',
  `admin_remark` varchar(500) DEFAULT NULL COMMENT '管理员备注',
  `processed_at` datetime DEFAULT NULL COMMENT '处理时间',
  `created_at` timestamp DEFAULT CURRENT_TIMESTAMP,
  `updated_at` timestamp DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`),
  KEY `order_id` (`order_id`),
  KEY `user_id` (`user_id`),
  KEY `status` (`status`),
  CONSTRAINT `refunds_ibfk_1` FOREIGN KEY (`order_id`) REFERENCES `orders` (`id`),
  CONSTRAINT `refunds_ibfk_2` FOREIGN KEY (`user_id`) REFERENCES `users` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='退款申请表';

-- 退款表索引
SET @idx_exists = (SELECT COUNT(*) FROM information_schema.STATISTICS WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'refunds' AND INDEX_NAME = 'idx_refunds_status');
SET @sql = IF(@idx_exists = 0, 'ALTER TABLE `refunds` ADD INDEX `idx_refunds_status` (`status`)', 'SELECT 1');
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;
SET @idx_exists = (SELECT COUNT(*) FROM information_schema.STATISTICS WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'refunds' AND INDEX_NAME = 'idx_refunds_created_at');
SET @sql = IF(@idx_exists = 0, 'ALTER TABLE `refunds` ADD INDEX `idx_refunds_created_at` (`created_at`)', 'SELECT 1');
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;

-- 首页分类配置表
CREATE TABLE IF NOT EXISTS `home_categories` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `category_id` int(11) NOT NULL COMMENT '分类ID',
  `sort_order` int(11) DEFAULT 0 COMMENT '排序顺序',
  `is_enabled` tinyint(1) DEFAULT 1 COMMENT '是否启用',
  `created_at` timestamp DEFAULT CURRENT_TIMESTAMP,
  `updated_at` timestamp DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`),
  KEY `category_id` (`category_id`),
  KEY `is_enabled` (`is_enabled`),
  KEY `sort_order` (`sort_order`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='首页分类配置表';

-- 首页分类默认数据
INSERT INTO `home_categories` (`category_id`, `sort_order`, `is_enabled`) VALUES
(1, 1, 1),
(10, 2, 1),
(42, 3, 1),
(49, 4, 1),
(37, 5, 1),
(13, 6, 1),
(2, 7, 1),
(5, 8, 1);

-- 库存调整流水表 (P1-D2)
CREATE TABLE IF NOT EXISTS `stock_logs` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `goods_id` int(11) NOT NULL COMMENT '商品ID',
  `change_qty` int(11) NOT NULL COMMENT '变更量 (正=入库/负=出库)',
  `before_qty` int(11) NOT NULL COMMENT '变更前库存',
  `after_qty` int(11) NOT NULL COMMENT '变更后库存',
  `reason` varchar(50) NOT NULL COMMENT '原因: purchase/sale/manual/refund',
  `ref_id` varchar(64) DEFAULT NULL COMMENT '关联单据ID(采购单/订单号)',
  `operator_id` int(11) DEFAULT NULL COMMENT '操作员ID',
  `created_at` timestamp DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`),
  KEY `goods_id` (`goods_id`),
  KEY `reason` (`reason`),
  KEY `created_at` (`created_at`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='库存流水表';

-- token 黑名单 (服务端 logout 强制失效)
CREATE TABLE IF NOT EXISTS `token_blacklist` (
  `jti` varchar(64) NOT NULL COMMENT 'JWT ID',
  `user_id` int(11) NOT NULL COMMENT '用户ID',
  `expired_at` datetime NOT NULL COMMENT '原 token 过期时间',
  `created_at` timestamp DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (`jti`),
  KEY `user_id` (`user_id`),
  KEY `expired_at` (`expired_at`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='JWT 黑名单';

-- AI 调用限流与缓存
CREATE TABLE IF NOT EXISTS `ai_cache` (
  `key_hash` char(64) NOT NULL COMMENT '请求 hash',
  `response` text NOT NULL COMMENT '响应体',
  `hits` int(11) DEFAULT 1,
  `expires_at` datetime NOT NULL,
  `created_at` timestamp DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (`key_hash`),
  KEY `expires_at` (`expires_at`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='AI 响应缓存';

-- 迁移：order_items.order_id 从 int 改为 varchar(64)，与 orders.id (varchar(50)) 保持一致
SET @fk_exists = (SELECT COUNT(*) FROM information_schema.TABLE_CONSTRAINTS WHERE CONSTRAINT_SCHEMA = DATABASE() AND TABLE_NAME = 'order_items' AND CONSTRAINT_NAME = 'order_items_ibfk_1');
SET @sql = IF(@fk_exists > 0, 'ALTER TABLE `order_items` DROP FOREIGN KEY `order_items_ibfk_1`', 'SELECT 1');
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;
ALTER TABLE `order_items` MODIFY COLUMN `order_id` varchar(64) NOT NULL COMMENT '订单ID';
SET @fk_exists = (SELECT COUNT(*) FROM information_schema.TABLE_CONSTRAINTS WHERE CONSTRAINT_SCHEMA = DATABASE() AND TABLE_NAME = 'order_items' AND CONSTRAINT_NAME = 'order_items_ibfk_1');
SET @sql = IF(@fk_exists = 0, 'ALTER TABLE `order_items` ADD CONSTRAINT `order_items_ibfk_1` FOREIGN KEY (`order_id`) REFERENCES `orders` (`id`) ON DELETE CASCADE', 'SELECT 1');
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;