-- 宁夏智慧养殖监管平台数据库表结构脚本
-- 基于Sequelize模型定义生成
-- 创建时间: 2024年

-- 设置字符集和排序规则
SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;

-- 创建数据库（如果不存在）
-- CREATE DATABASE IF NOT EXISTS nxxmdata CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
-- USE nxxmdata;

-- ============================================
-- 用户相关表
-- ============================================

-- 用户表
CREATE TABLE IF NOT EXISTS `users` (
  `id` int(11) NOT NULL AUTO_INCREMENT COMMENT '用户唯一标识',
  `username` varchar(50) NOT NULL COMMENT '用户名',
  `email` varchar(100) NOT NULL COMMENT '邮箱',
  `password` varchar(255) NOT NULL COMMENT '密码（加密后）',
  `phone` varchar(20) DEFAULT NULL COMMENT '手机号',
  `avatar` varchar(255) DEFAULT NULL COMMENT '头像URL',
  `status` enum('active','inactive','banned') DEFAULT 'active' COMMENT '用户状态',
  `last_login` datetime DEFAULT NULL COMMENT '最后登录时间',
  `created_at` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
  `updated_at` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',
  PRIMARY KEY (`id`),
  UNIQUE KEY `username` (`username`),
  UNIQUE KEY `email` (`email`),
  KEY `idx_status` (`status`),
  KEY `idx_created_at` (`created_at`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='用户表';

-- 角色表
CREATE TABLE IF NOT EXISTS `roles` (
  `id` int(11) NOT NULL AUTO_INCREMENT COMMENT '角色唯一标识',
  `name` varchar(50) NOT NULL COMMENT '角色名称',
  `description` text DEFAULT NULL COMMENT '角色描述',
  `created_at` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
  PRIMARY KEY (`id`),
  UNIQUE KEY `name` (`name`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='角色表';

-- 用户角色关联表
CREATE TABLE IF NOT EXISTS `user_roles` (
  `user_id` int(11) NOT NULL COMMENT '用户ID',
  `role_id` int(11) NOT NULL COMMENT '角色ID',
  `assigned_at` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '分配时间',
  PRIMARY KEY (`user_id`, `role_id`),
  KEY `fk_user_roles_role_id` (`role_id`),
  CONSTRAINT `fk_user_roles_user_id` FOREIGN KEY (`user_id`) REFERENCES `users` (`id`) ON DELETE CASCADE ON UPDATE CASCADE,
  CONSTRAINT `fk_user_roles_role_id` FOREIGN KEY (`role_id`) REFERENCES `roles` (`id`) ON DELETE CASCADE ON UPDATE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='用户角色关联表';

-- ============================================
-- 养殖场相关表
-- ============================================

-- 养殖场表
CREATE TABLE IF NOT EXISTS `farms` (
  `id` int(11) NOT NULL AUTO_INCREMENT COMMENT '养殖场唯一标识',
  `name` varchar(100) NOT NULL COMMENT '养殖场名称',
  `type` varchar(50) NOT NULL COMMENT '养殖场类型',
  `location` json NOT NULL COMMENT '地理位置信息（经纬度等）',
  `address` varchar(255) DEFAULT NULL COMMENT '详细地址',
  `contact` varchar(50) DEFAULT NULL COMMENT '联系人',
  `phone` varchar(20) DEFAULT NULL COMMENT '联系电话',
  `status` enum('active','inactive','maintenance') DEFAULT 'active' COMMENT '养殖场状态',
  `created_at` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
  `updated_at` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',
  PRIMARY KEY (`id`),
  KEY `idx_type` (`type`),
  KEY `idx_status` (`status`),
  KEY `idx_created_at` (`created_at`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='养殖场表';

-- 动物表
CREATE TABLE IF NOT EXISTS `animals` (
  `id` int(11) NOT NULL AUTO_INCREMENT COMMENT '动物记录唯一标识',
  `type` varchar(50) NOT NULL COMMENT '动物类型',
  `count` int(11) NOT NULL DEFAULT 0 COMMENT '数量',
  `farm_id` int(11) NOT NULL COMMENT '所属养殖场ID',
  `health_status` enum('healthy','sick','quarantine') DEFAULT 'healthy' COMMENT '健康状态',
  `last_inspection` datetime DEFAULT NULL COMMENT '最后检查时间',
  `notes` text DEFAULT NULL COMMENT '备注信息',
  `created_at` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
  `updated_at` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',
  PRIMARY KEY (`id`),
  KEY `fk_animals_farm_id` (`farm_id`),
  KEY `idx_type` (`type`),
  KEY `idx_health_status` (`health_status`),
  CONSTRAINT `fk_animals_farm_id` FOREIGN KEY (`farm_id`) REFERENCES `farms` (`id`) ON DELETE CASCADE ON UPDATE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='动物表';

-- 设备表
CREATE TABLE IF NOT EXISTS `devices` (
  `id` int(11) NOT NULL AUTO_INCREMENT COMMENT '设备唯一标识',
  `name` varchar(100) NOT NULL COMMENT '设备名称',
  `type` varchar(50) NOT NULL COMMENT '设备类型',
  `status` enum('online','offline','maintenance') DEFAULT 'offline' COMMENT '设备状态',
  `farm_id` int(11) NOT NULL COMMENT '所属养殖场ID',
  `last_maintenance` datetime DEFAULT NULL COMMENT '最后维护时间',
  `installation_date` datetime DEFAULT NULL COMMENT '安装日期',
  `metrics` json DEFAULT NULL COMMENT '设备指标数据',
  `created_at` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
  `updated_at` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',
  PRIMARY KEY (`id`),
  KEY `fk_devices_farm_id` (`farm_id`),
  KEY `idx_type` (`type`),
  KEY `idx_status` (`status`),
  CONSTRAINT `fk_devices_farm_id` FOREIGN KEY (`farm_id`) REFERENCES `farms` (`id`) ON DELETE CASCADE ON UPDATE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='设备表';

-- 预警表
CREATE TABLE IF NOT EXISTS `alerts` (
  `id` int(11) NOT NULL AUTO_INCREMENT COMMENT '预警唯一标识',
  `type` varchar(50) NOT NULL COMMENT '预警类型',
  `level` enum('low','medium','high','critical') DEFAULT 'medium' COMMENT '预警级别',
  `message` text NOT NULL COMMENT '预警消息',
  `status` enum('active','acknowledged','resolved') DEFAULT 'active' COMMENT '预警状态',
  `farm_id` int(11) NOT NULL COMMENT '所属养殖场ID',
  `device_id` int(11) DEFAULT NULL COMMENT '关联设备ID',
  `resolved_at` datetime DEFAULT NULL COMMENT '解决时间',
  `resolved_by` int(11) DEFAULT NULL COMMENT '解决人ID',
  `resolution_notes` text DEFAULT NULL COMMENT '解决说明',
  `created_at` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
  `updated_at` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',
  PRIMARY KEY (`id`),
  KEY `fk_alerts_farm_id` (`farm_id`),
  KEY `fk_alerts_device_id` (`device_id`),
  KEY `fk_alerts_resolved_by` (`resolved_by`),
  KEY `idx_type` (`type`),
  KEY `idx_level` (`level`),
  KEY `idx_status` (`status`),
  KEY `idx_created_at` (`created_at`),
  CONSTRAINT `fk_alerts_farm_id` FOREIGN KEY (`farm_id`) REFERENCES `farms` (`id`) ON DELETE CASCADE ON UPDATE CASCADE,
  CONSTRAINT `fk_alerts_device_id` FOREIGN KEY (`device_id`) REFERENCES `devices` (`id`) ON DELETE CASCADE ON UPDATE CASCADE,
  CONSTRAINT `fk_alerts_resolved_by` FOREIGN KEY (`resolved_by`) REFERENCES `users` (`id`) ON DELETE SET NULL ON UPDATE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='预警表';

-- ============================================
-- 商品订单相关表
-- ============================================

-- 产品表
CREATE TABLE IF NOT EXISTS `products` (
  `id` int(11) NOT NULL AUTO_INCREMENT COMMENT '产品唯一标识',
  `name` varchar(100) NOT NULL COMMENT '产品名称',
  `description` text DEFAULT NULL COMMENT '产品描述',
  `price` int(11) NOT NULL COMMENT '产品价格（单位：分）',
  `stock` int(11) NOT NULL DEFAULT 0 COMMENT '库存数量',
  `image_url` varchar(255) DEFAULT NULL COMMENT '产品图片URL',
  `is_active` tinyint(1) NOT NULL DEFAULT 1 COMMENT '是否激活',
  `created_at` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
  `updated_at` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',
  PRIMARY KEY (`id`),
  KEY `idx_name` (`name`),
  KEY `idx_is_active` (`is_active`),
  KEY `idx_created_at` (`created_at`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='产品表';

-- 订单表
CREATE TABLE IF NOT EXISTS `orders` (
  `id` int(11) NOT NULL AUTO_INCREMENT COMMENT '订单唯一标识',
  `user_id` int(11) NOT NULL COMMENT '用户ID',
  `total_amount` int(11) NOT NULL DEFAULT 0 COMMENT '订单总金额（单位：分）',
  `status` enum('pending','processing','shipped','delivered','cancelled') NOT NULL DEFAULT 'pending' COMMENT '订单状态',
  `payment_status` enum('unpaid','paid','refunded') NOT NULL DEFAULT 'unpaid' COMMENT '支付状态',
  `shipping_address` text DEFAULT NULL COMMENT '收货地址',
  `created_at` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
  `updated_at` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',
  PRIMARY KEY (`id`),
  KEY `fk_orders_user_id` (`user_id`),
  KEY `idx_status` (`status`),
  KEY `idx_payment_status` (`payment_status`),
  KEY `idx_created_at` (`created_at`),
  CONSTRAINT `fk_orders_user_id` FOREIGN KEY (`user_id`) REFERENCES `users` (`id`) ON DELETE CASCADE ON UPDATE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='订单表';

-- 订单项表
CREATE TABLE IF NOT EXISTS `order_items` (
  `id` int(11) NOT NULL AUTO_INCREMENT COMMENT '订单项唯一标识',
  `order_id` int(11) NOT NULL COMMENT '订单ID',
  `product_id` int(11) NOT NULL COMMENT '产品ID',
  `quantity` int(11) NOT NULL DEFAULT 1 COMMENT '数量',
  `price` int(11) NOT NULL COMMENT '单价（单位：分）',
  `created_at` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
  PRIMARY KEY (`id`),
  KEY `fk_order_items_order_id` (`order_id`),
  KEY `fk_order_items_product_id` (`product_id`),
  CONSTRAINT `fk_order_items_order_id` FOREIGN KEY (`order_id`) REFERENCES `orders` (`id`) ON DELETE CASCADE ON UPDATE CASCADE,
  CONSTRAINT `fk_order_items_product_id` FOREIGN KEY (`product_id`) REFERENCES `products` (`id`) ON DELETE RESTRICT ON UPDATE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='订单项表';

-- ============================================
-- 初始化数据
-- ============================================

-- 插入默认角色
INSERT IGNORE INTO `roles` (`name`, `description`) VALUES
('admin', '系统管理员'),
('manager', '养殖场管理员'),
('operator', '操作员'),
('viewer', '查看者');

-- 插入默认管理员用户（密码: admin123，需要在应用中加密）
INSERT IGNORE INTO `users` (`username`, `email`, `password`, `status`) VALUES
('admin', 'admin@nxxmdata.com', '$2b$10$placeholder_hash_for_admin123', 'active');

-- 为管理员分配admin角色
INSERT IGNORE INTO `user_roles` (`user_id`, `role_id`) 
SELECT u.id, r.id 
FROM `users` u, `roles` r 
WHERE u.username = 'admin' AND r.name = 'admin';

-- ============================================
-- 索引优化建议
-- ============================================

-- 复合索引
CREATE INDEX `idx_farms_type_status` ON `farms` (`type`, `status`);
CREATE INDEX `idx_animals_farm_type` ON `animals` (`farm_id`, `type`);
CREATE INDEX `idx_devices_farm_status` ON `devices` (`farm_id`, `status`);
CREATE INDEX `idx_alerts_farm_status_level` ON `alerts` (`farm_id`, `status`, `level`);
CREATE INDEX `idx_orders_user_status` ON `orders` (`user_id`, `status`);
CREATE INDEX `idx_order_items_order_product` ON `order_items` (`order_id`, `product_id`);

-- 时间范围查询索引
CREATE INDEX `idx_alerts_created_status` ON `alerts` (`created_at`, `status`);
CREATE INDEX `idx_orders_created_status` ON `orders` (`created_at`, `status`);

SET FOREIGN_KEY_CHECKS = 1;

-- 脚本执行完成
-- 注意：
-- 1. 请根据实际需求调整字段长度和约束
-- 2. 密码字段需要在应用层进行加密处理
-- 3. JSON字段需要MySQL 5.7+版本支持
-- 4. 建议定期备份数据库
-- 5. 生产环境请根据实际情况调整索引策略