-- 创建数据库
CREATE DATABASE IF NOT EXISTS project_management CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

-- 创建用户并授权
CREATE USER IF NOT EXISTS 'project_user'@'localhost' IDENTIFIED BY 'project_password';
GRANT ALL PRIVILEGES ON project_management.* TO 'project_user'@'localhost';
FLUSH PRIVILEGES;

-- 使用数据库
USE project_management;

-- 创建用户表
CREATE TABLE IF NOT EXISTS users (
    id INT AUTO_INCREMENT PRIMARY KEY,
    username VARCHAR(50) UNIQUE NOT NULL,
    password VARCHAR(100) NOT NULL,
    department VARCHAR(50) NOT NULL,
    role VARCHAR(20) NOT NULL,
    created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
    updated_at DATETIME DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
);

-- 创建项目表
CREATE TABLE IF NOT EXISTS projects (
    id INT AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(100) NOT NULL,
    description TEXT,
    created_by INT NOT NULL,
    department VARCHAR(50) NOT NULL,
    budget INT,
    start_date DATETIME,
    end_date DATETIME,
    status VARCHAR(20) DEFAULT 'pending',
    created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
    updated_at DATETIME DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    FOREIGN KEY (created_by) REFERENCES users(id)
);

-- 创建项目历史记录表
CREATE TABLE IF NOT EXISTS project_histories (
    id INT AUTO_INCREMENT PRIMARY KEY,
    project_id INT NOT NULL,
    changed_by INT NOT NULL,
    change_field VARCHAR(100) NOT NULL,
    old_value TEXT,
    new_value TEXT,
    change_description TEXT,
    created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (project_id) REFERENCES projects(id),
    FOREIGN KEY (changed_by) REFERENCES users(id)
);

-- 插入初始用户数据
INSERT INTO users (username, password, department, role) VALUES
('admin', '$2b$12$EixZaYVK1fsbw1ZfbX3OXePaWxn96p36WQoeG6Lruj3vjPGga31lW', 'IT', 'admin'),
('marketing', '$2b$12$EixZaYVK1fsbw1ZfbX3OXePaWxn96p36WQoeG6Lruj3vjPGga31lW', 'Marketing', 'marketing'),
('other', '$2b$12$EixZaYVK1fsbw1ZfbX3OXePaWxn96p36WQoeG6Lruj3vjPGga31lW', 'Other', 'other');

-- 密码说明：上面的密码是 '123456' 的 bcrypt 哈希值