-- init.sql
-- 用户表
CREATE TABLE users (
    id INT PRIMARY KEY AUTO_INCREMENT COMMENT "用户id",
    username VARCHAR(50) UNIQUE NOT NULL COMMENT "用户名",
    password VARCHAR(255) NOT NULL COMMENT "密码",
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP COMMENT "创建时间",
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT "更新时间"
);

-- 角色表
CREATE TABLE roles (
    id INT PRIMARY KEY AUTO_INCREMENT COMMENT "角色id",
    name VARCHAR(50) UNIQUE NOT NULL COMMENT "角色名称",
    description TEXT COMMENT "角色描述",
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP COMMENT "创建时间",
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT "更新时间"
);

-- 权限表
CREATE TABLE permissions (
    id INT PRIMARY KEY AUTO_INCREMENT COMMENT "权限id",
    name VARCHAR(100) UNIQUE NOT NULL COMMENT "权限名称",
    description TEXT COMMENT "权限描述",
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP COMMENT "创建时间",
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE  CURRENT_TIMESTAMP COMMENT "更新时间"
);

-- 用户-角色关联表
CREATE TABLE user_roles (
    user_id INT COMMENT "用户id",
    role_id INT COMMENT "角色id",
    PRIMARY KEY (user_id, role_id),
    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE,
    FOREIGN KEY (role_id) REFERENCES roles(id) ON DELETE CASCADE
);

-- 角色-权限关联表
CREATE TABLE role_permissions (
    role_id INT COMMENT "角色id",
    permission_id INT COMMENT "权限id",
    PRIMARY KEY (role_id, permission_id),
    FOREIGN KEY (role_id) REFERENCES roles(id) ON DELETE CASCADE,
    FOREIGN KEY (permission_id) REFERENCES permissions(id) ON DELETE CASCADE
);

-- 商品表
CREATE TABLE products (
    id INT PRIMARY KEY AUTO_INCREMENT COMMENT "商品id",
    name VARCHAR(255) NOT NULL COMMENT "商品名称",
    description TEXT COMMENT "商品描述",
    price DECIMAL(10, 2) NOT NULL COMMENT "商品价格",
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP COMMENT "创建时间",
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE  CURRENT_TIMESTAMP COMMENT "更新时间"
);

-- 插入默认角色
INSERT INTO roles (name, description) VALUES 
('USER', '普通用户'),
('ADMIN', '管理员');

-- 插入默认权限
INSERT INTO permissions (name, description) VALUES 
('PRODUCT_READ', '读取商品信息'),
('PRODUCT_CREATE', '创建商品'),
('PRODUCT_UPDATE', '更新商品'),
('PRODUCT_DELETE', '删除商品');

-- 给 ADMIN 角色分配所有权限
INSERT INTO role_permissions (role_id, permission_id)
SELECT r.id, p.id
FROM roles r, permissions p
WHERE r.name = 'ADMIN';


-- 给 USER 角色分配读取权限
INSERT INTO role_permissions (role_id, permission_id)
SELECT r.id, p.id
FROM roles r, permissions p
WHERE r.name = 'USER' and p.name = 'PRODUCT_READ'