-- OSS Community 数据库结构
CREATE DATABASE IF NOT EXISTS oss_community CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
USE oss_community;

-- 用户表
CREATE TABLE IF NOT EXISTS users (
    id INT AUTO_INCREMENT PRIMARY KEY,
    username VARCHAR(50) NOT NULL UNIQUE,
    email VARCHAR(100) NOT NULL UNIQUE,
    password_hash VARCHAR(255) NOT NULL,
    avatar VARCHAR(255) DEFAULT '',
    bio TEXT,
    role ENUM('admin', 'moderator', 'member') DEFAULT 'member',
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

-- 分类表
CREATE TABLE IF NOT EXISTS categories (
    id INT AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(100) NOT NULL,
    slug VARCHAR(100) NOT NULL UNIQUE,
    description TEXT,
    icon VARCHAR(50) DEFAULT 'folder',
    sort_order INT DEFAULT 0,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

-- 帖子表
CREATE TABLE IF NOT EXISTS posts (
    id INT AUTO_INCREMENT PRIMARY KEY,
    user_id INT NOT NULL,
    category_id INT NOT NULL,
    title VARCHAR(200) NOT NULL,
    slug VARCHAR(200) NOT NULL UNIQUE,
    content TEXT NOT NULL,
    views INT DEFAULT 0,
    likes INT DEFAULT 0,
    is_pinned TINYINT(1) DEFAULT 0,
    is_locked TINYINT(1) DEFAULT 0,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE,
    FOREIGN KEY (category_id) REFERENCES categories(id) ON DELETE CASCADE,
    FULLTEXT(title, content)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

-- 回复表
CREATE TABLE IF NOT EXISTS replies (
    id INT AUTO_INCREMENT PRIMARY KEY,
    post_id INT NOT NULL,
    user_id INT NOT NULL,
    content TEXT NOT NULL,
    likes INT DEFAULT 0,
    is_solution TINYINT(1) DEFAULT 0,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (post_id) REFERENCES posts(id) ON DELETE CASCADE,
    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

-- 点赞表
CREATE TABLE IF NOT EXISTS likes (
    id INT AUTO_INCREMENT PRIMARY KEY,
    user_id INT NOT NULL,
    post_id INT DEFAULT NULL,
    reply_id INT DEFAULT NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    UNIQUE KEY unique_like (user_id, post_id, reply_id),
    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE,
    FOREIGN KEY (post_id) REFERENCES posts(id) ON DELETE SET NULL,
    FOREIGN KEY (reply_id) REFERENCES replies(id) ON DELETE SET NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

-- 标签表
CREATE TABLE IF NOT EXISTS tags (
    id INT AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(50) NOT NULL UNIQUE,
    slug VARCHAR(50) NOT NULL UNIQUE,
    color VARCHAR(7) DEFAULT '#06b6d4'
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

-- 帖子标签关联表
CREATE TABLE IF NOT EXISTS post_tags (
    post_id INT NOT NULL,
    tag_id INT NOT NULL,
    PRIMARY KEY (post_id, tag_id),
    FOREIGN KEY (post_id) REFERENCES posts(id) ON DELETE CASCADE,
    FOREIGN KEY (tag_id) REFERENCES tags(id) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

-- 初始数据
INSERT IGNORE INTO categories (name, slug, description, icon, sort_order) VALUES
('公告', 'announcements', '官方公告和重要通知', 'megaphone', 1),
('问答', 'q-a', '提问与解答，互助交流', 'question', 2),
('讨论', 'discussions', '技术讨论与想法分享', 'chat', 3),
('插件市场', 'plugins', '插件展示与推荐', 'puzzle', 4),
('反馈', 'feedback', 'Bug 反馈与功能建议', 'bug', 5);

INSERT IGNORE INTO tags (name, slug, color) VALUES
('Go', 'go', '#00add8'),
('插件', 'plugin', '#8b5cf6'),
('安装', 'install', '#22c55e'),
('配置', 'config', '#3b82f6'),
('求助', 'help', '#f59e0b');