-- ============================================================
-- 积分规则引擎升级脚本（已部署老库）
-- 作用：把 member_score_rule / member_score_log 升级到规则引擎版本
--   1) score_rule：name → title（沿用 rename_score_rule_name_to_title.sql 的判定），
--      新增 addon / limit_type / limit_times / unique_type / remark 五列
--   2) score_log：新增 action / source / source_id 三列 + idx_rule / idx_dedup 索引
-- 适用范围：已装库。新装库由 public/install/install.sql 直接建新表，无需执行。
-- 特性：
--   1) 自动探测表前缀，匹配任意 `<前缀>_score_rule` / `<前缀>_score_log`
--   2) 幂等：列/索引存在则跳过，重命名仅在「有 name 且无 title」时执行
-- 执行：
--   mysql -u<user> -p <database> < upgrade_score_rule_engine.sql
-- ============================================================

DELIMITER //

DROP PROCEDURE IF EXISTS `__mig_score_addcol`//
CREATE PROCEDURE `__mig_score_addcol`(IN p_tbl VARCHAR(64), IN p_col VARCHAR(64), IN p_def VARCHAR(512))
BEGIN
  IF NOT EXISTS (
    SELECT 1 FROM information_schema.COLUMNS
    WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = p_tbl AND COLUMN_NAME = p_col
  ) THEN
    SET @sql = CONCAT('ALTER TABLE `', p_tbl, '` ADD COLUMN `', p_col, '` ', p_def);
    PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;
  END IF;
END//

DROP PROCEDURE IF EXISTS `__mig_score_addindex`//
CREATE PROCEDURE `__mig_score_addindex`(IN p_tbl VARCHAR(64), IN p_idx VARCHAR(64), IN p_cols VARCHAR(255))
BEGIN
  IF NOT EXISTS (
    SELECT 1 FROM information_schema.STATISTICS
    WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = p_tbl AND INDEX_NAME = p_idx
  ) THEN
    SET @sql = CONCAT('ALTER TABLE `', p_tbl, '` ADD INDEX `', p_idx, '` (', p_cols, ')');
    PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;
  END IF;
END//

DROP PROCEDURE IF EXISTS `__mig_score_engine`//
CREATE PROCEDURE `__mig_score_engine`()
BEGIN
  DECLARE done INT DEFAULT 0;
  DECLARE tbl VARCHAR(64);
  DECLARE has_name INT DEFAULT 0;
  DECLARE has_title INT DEFAULT 0;

  -- ---------- 1. 规则表 ----------
  BEGIN
    DECLARE cur CURSOR FOR
      SELECT TABLE_NAME FROM information_schema.TABLES
      WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME LIKE '%\_score\_rule';
    DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = 1;

    OPEN cur;
    rule_loop: LOOP
      FETCH cur INTO tbl;
      IF done = 1 THEN LEAVE rule_loop; END IF;

      SELECT COUNT(*) INTO has_name FROM information_schema.COLUMNS
        WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = tbl AND COLUMN_NAME = 'name';
      SELECT COUNT(*) INTO has_title FROM information_schema.COLUMNS
        WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = tbl AND COLUMN_NAME = 'title';

      IF has_name > 0 AND has_title = 0 THEN
        SET @sql = CONCAT(
          'ALTER TABLE `', tbl, '` CHANGE COLUMN `name` `title` ',
          'varchar(100) NOT NULL DEFAULT '''' COMMENT ''规则名称'''
        );
        PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;
      END IF;

      CALL __mig_score_addcol(tbl, 'addon',       "varchar(50) NOT NULL DEFAULT '' COMMENT '归属插件标识(空=核心)'");
      CALL __mig_score_addcol(tbl, 'limit_type',  "tinyint(4) NOT NULL DEFAULT 0 COMMENT '限次周期 0不限1每日2每周3每月4累计'");
      CALL __mig_score_addcol(tbl, 'limit_times', "int(11) NOT NULL DEFAULT 0 COMMENT '周期内最多触发次数(0=不限)'");
      CALL __mig_score_addcol(tbl, 'unique_type', "tinyint(4) NOT NULL DEFAULT 0 COMMENT '去重 0不去重1按来源业务ID去重'");
      CALL __mig_score_addcol(tbl, 'remark',      "varchar(255) NOT NULL DEFAULT '' COMMENT '流水备注模板({title}等占位)'");

      CALL __mig_score_addindex(tbl, 'idx_addon', '`addon`');
    END LOOP;
    CLOSE cur;
  END;

  -- ---------- 2. 流水表 ----------
  BEGIN
    DECLARE cur2 CURSOR FOR
      SELECT TABLE_NAME FROM information_schema.TABLES
      WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME LIKE '%\_score\_log';
    DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = 1;

    SET done = 0;
    OPEN cur2;
    log_loop: LOOP
      FETCH cur2 INTO tbl;
      IF done = 1 THEN LEAVE log_loop; END IF;

      CALL __mig_score_addcol(tbl, 'action',    "varchar(50) NOT NULL DEFAULT '' COMMENT '触发动作标识'");
      CALL __mig_score_addcol(tbl, 'source',    "varchar(50) NOT NULL DEFAULT '' COMMENT '来源模块/插件'");
      CALL __mig_score_addcol(tbl, 'source_id', "varchar(64) NOT NULL DEFAULT '' COMMENT '来源业务ID(去重与追踪)'");

      CALL __mig_score_addindex(tbl, 'idx_rule',  '`rule_id`');
      CALL __mig_score_addindex(tbl, 'idx_dedup', '`action`,`uid`,`source_id`');
    END LOOP;
    CLOSE cur2;
  END;
END//

DELIMITER ;

CALL __mig_score_engine();

DROP PROCEDURE IF EXISTS `__mig_score_engine`;
DROP PROCEDURE IF EXISTS `__mig_score_addcol`;
DROP PROCEDURE IF EXISTS `__mig_score_addindex`;