-- 迁移关注数据脚本
-- 步骤1: 创建新的关注记录表
CREATE TABLE IF NOT EXISTS `eb_follow_record` (
  `id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT '主键ID',
  `follower_id` int(11) NOT NULL COMMENT '关注者用户ID',
  `follower_nickname` varchar(50) DEFAULT NULL COMMENT '关注者昵称',
  `follower_phone` varchar(20) DEFAULT NULL COMMENT '关注者手机号',
  `followed_id` int(11) NOT NULL COMMENT '被关注者用户ID',
  `followed_nickname` varchar(50) DEFAULT NULL COMMENT '被关注者昵称',
  `followed_phone` varchar(20) DEFAULT NULL COMMENT '被关注者手机号',
  `follow_status` tinyint(4) NOT NULL DEFAULT '1' COMMENT '关注状态：1-已关注 0-已取消',
  `is_deleted` tinyint(4) NOT NULL DEFAULT '0' COMMENT '逻辑删除：0-未删除 1-已删除',
  `create_time` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
  `update_time` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',
  `ext_field1` varchar(100) DEFAULT NULL COMMENT '扩展字段1：关注来源/渠道',
  `ext_field2` int(11) DEFAULT NULL COMMENT '扩展字段2：关注类型/优先级',
  `ext_field3` varchar(200) DEFAULT NULL COMMENT '扩展字段3：特殊标记/备注',
  `ext_field4` bigint(20) DEFAULT NULL COMMENT '扩展字段4：关联数据ID',
  `ext_field5` text COMMENT '扩展字段5：JSON扩展数据',
  PRIMARY KEY (`id`),
  UNIQUE KEY `uk_follower_followed` (`follower_id`,`followed_id`),
  KEY `idx_follower_id` (`follower_id`),
  KEY `idx_followed_id` (`followed_id`),
  KEY `idx_follow_status` (`follow_status`),
  KEY `idx_is_deleted` (`is_deleted`),
  KEY `idx_create_time` (`create_time`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='关注记录表';

-- 步骤2: 检查 eb_user_follow 表是否存在数据
-- 如果存在，迁移数据到新表
INSERT IGNORE INTO eb_follow_record (follower_id, follower_nickname, follower_phone, followed_id, followed_nickname, followed_phone, follow_status, is_deleted, create_time)
SELECT 
    uf.user_id as follower_id,
    u1.nickname as follower_nickname,
    u1.phone as follower_phone,
    uf.follow_user_id as followed_id,
    u2.nickname as followed_nickname,
    u2.phone as followed_phone,
    1 as follow_status,
    0 as is_deleted,
    uf.create_time
FROM eb_user_follow uf
LEFT JOIN eb_user u1 ON uf.user_id = u1.uid
LEFT JOIN eb_user u2 ON uf.follow_user_id = u2.uid
WHERE EXISTS (SELECT 1 FROM eb_user_follow LIMIT 1);

-- 步骤3: 验证数据迁移
SELECT 
    '原表记录数' as description,
    COUNT(*) as count
FROM eb_user_follow
UNION ALL
SELECT 
    '新表记录数' as description,
    COUNT(*) as count
FROM eb_follow_record;