-- 创建陪伴员等级表
CREATE TABLE IF NOT EXISTS `teacher_level` (
  `id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT '主键ID',
  `teacher_id` bigint(20) NOT NULL COMMENT '陪伴员ID',
  `current_level` int(11) NOT NULL DEFAULT '1' COMMENT '当前等级(1-5)',
  `level_name` varchar(50) DEFAULT NULL COMMENT '等级名称',
  `upgrade_time` datetime DEFAULT NULL COMMENT '升级时间',
  `next_level` int(11) DEFAULT NULL COMMENT '下一等级',
  `can_upgrade` tinyint(1) DEFAULT '0' COMMENT '是否可以升级',
  `exam_score` decimal(5,2) DEFAULT NULL COMMENT '考核分数',
  `exam_passed` tinyint(1) DEFAULT '0' COMMENT '是否通过考核',
  `video_count` int(11) DEFAULT '0' COMMENT '已上传视频数',
  `required_video_count` int(11) DEFAULT '0' COMMENT '要求视频数',
  `rating_score` decimal(3,2) DEFAULT NULL COMMENT '评分',
  `service_count` int(11) DEFAULT '0' COMMENT '服务次数',
  `create_time` datetime DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
  `update_time` datetime DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',
  `tenant_id` bigint(20) DEFAULT '1' COMMENT '租户ID',
  PRIMARY KEY (`id`),
  UNIQUE KEY `uk_teacher_id` (`teacher_id`),
  KEY `idx_tenant_id` (`tenant_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='陪伴员等级表';

-- 为现有陪伴员初始化等级数据
INSERT INTO `teacher_level` (`teacher_id`, `current_level`, `level_name`, `can_upgrade`, `exam_passed`, `tenant_id`)
SELECT 
  id,
  1 AS current_level,
  '初级陪伴员' AS level_name,
  0 AS can_upgrade,
  1 AS exam_passed,
  1 AS tenant_id
FROM `user`
WHERE user_type = 'teacher'
  AND id NOT IN (SELECT teacher_id FROM `teacher_level`)
ON DUPLICATE KEY UPDATE update_time = CURRENT_TIMESTAMP;