from sqlalchemy import Column, Integer, String, DateTime

class Checkpoint:
    """观测点数据表结构定义 - 动态分表"""
    
    @staticmethod
    def get_table_name(account_id: int) -> str:
        return f"checkpoint_{account_id}"
    
    @staticmethod
    def get_create_sql(account_id: int) -> str:
        table_name = Checkpoint.get_table_name(account_id)
        return f"""
        CREATE TABLE IF NOT EXISTS `{table_name}` (
            `id` int unsigned NOT NULL AUTO_INCREMENT,
            `name` varchar(100) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL COMMENT '观察点名称',
            `burial_date` datetime DEFAULT NULL COMMENT '埋设日期',
            `objstate` varchar(3) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci DEFAULT NULL COMMENT '测点状态',
            `monitoring_type` varchar(100) DEFAULT NULL COMMENT '监测类型',
            `period_number` int DEFAULT NULL COMMENT '量测期次',
            `first_time` datetime DEFAULT NULL COMMENT '首测时间',
            `manufacturer` varchar(100) DEFAULT NULL COMMENT '负责厂商',
            `point_code` varchar(100) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci DEFAULT NULL COMMENT '测点编码',
            `point_id` varchar(100) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci DEFAULT NULL COMMENT '观察点id',
            `section_id` varchar(100) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL COMMENT '所属断面id',
            PRIMARY KEY (`id`),
            KEY `idx_point_id` (`point_id`),
            KEY `idx_section_id` (`section_id`)
        ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci COMMENT='观测点数据表';
        """