-- 添加用户封禁字段
ALTER TABLE users ADD COLUMN IF NOT EXISTS is_banned BOOLEAN NOT NULL DEFAULT FALSE;

-- 添加房间邀请码
ALTER TABLE rooms ADD COLUMN IF NOT EXISTS invite_code VARCHAR(8);

-- 添加用户最后在线 IP（用于安全审计）
ALTER TABLE users ADD COLUMN IF NOT EXISTS last_ip VARCHAR(45);

-- 创建房间邀请表
CREATE TABLE IF NOT EXISTS room_invites (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    room_id UUID NOT NULL REFERENCES rooms(id) ON DELETE CASCADE,
    inviter_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    invitee_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    status VARCHAR(16) NOT NULL DEFAULT 'pending' CHECK (status IN ('pending', 'accepted', 'declined', 'expired')),
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    expires_at TIMESTAMPTZ NOT NULL DEFAULT NOW() + INTERVAL '24 hours'
);

-- 创建服务器配置表（持久化配置）
CREATE TABLE IF NOT EXISTS server_config (
    key VARCHAR(64) PRIMARY KEY,
    value TEXT NOT NULL,
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- 创建操作日志表（管理审计）
CREATE TABLE IF NOT EXISTS admin_logs (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    admin_user VARCHAR(64) NOT NULL,
    action VARCHAR(64) NOT NULL,
    target_type VARCHAR(32),
    target_id UUID,
    details JSONB,
    ip_address VARCHAR(45),
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- 创建下载统计表
CREATE TABLE IF NOT EXISTS download_stats (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    filename VARCHAR(255) NOT NULL,
    platform VARCHAR(32) NOT NULL,
    ip_address VARCHAR(45),
    user_agent TEXT,
    downloaded_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- 索引
CREATE INDEX IF NOT EXISTS idx_room_invites_invitee ON room_invites(invitee_id);
CREATE INDEX IF NOT EXISTS idx_room_invites_room ON room_invites(room_id);
CREATE INDEX IF NOT EXISTS idx_admin_logs_created ON admin_logs(created_at DESC);
CREATE INDEX IF NOT EXISTS idx_download_stats_filename ON download_stats(filename);