-- 二期审批引擎扩展（可重复执行）
-- 目标库：db_gxtyzx（master）
-- 执行顺序：01-approval.sql -> 02-approval_menu.sql -> 03-approval_orgs_roles.sql
--          -> 04-approval_role_grants.sql -> 05-approval_phase2.sql
--
-- 覆盖 ADR 0003（会签）、0004（明细行）、0006（回填）、0007（流程类型筛选）。
-- MySQL 8 不支持 ADD COLUMN IF NOT EXISTS，因此用 information_schema 判断后动态执行。

-- 老数据回填：一期实例没有 title/search_text（幂等，只补空值）
UPDATE approval_instance i
JOIN approval_completion_form f ON f.instance_id = i.id
SET i.title = f.name,
    i.search_text = CONCAT_WS(' ', f.name, f.implement_org, f.service_content)
WHERE i.title IS NULL;

UPDATE approval_instance i
JOIN approval_coordination_form c ON c.instance_id = i.id
SET i.title = c.title,
    i.search_text = CONCAT_WS(' ', c.title, c.content, c.remark)
WHERE i.title IS NULL;

DROP PROCEDURE IF EXISTS approval_phase2_add_column;
DROP PROCEDURE IF EXISTS approval_phase2_add_index;

DELIMITER $$
CREATE PROCEDURE approval_phase2_add_column(IN p_table VARCHAR(64), IN p_column VARCHAR(64),
                                            IN p_definition TEXT)
BEGIN
  IF NOT EXISTS (
    SELECT 1 FROM information_schema.columns
    WHERE table_schema = DATABASE() AND table_name = p_table AND column_name = p_column
  ) THEN
    SET @ddl = CONCAT('ALTER TABLE ', p_table, ' ADD COLUMN ', p_definition);
    PREPARE stmt FROM @ddl;
    EXECUTE stmt;
    DEALLOCATE PREPARE stmt;
  END IF;
END$$

CREATE PROCEDURE approval_phase2_add_index(IN p_table VARCHAR(64), IN p_index VARCHAR(64),
                                           IN p_definition TEXT)
BEGIN
  IF NOT EXISTS (
    SELECT 1 FROM information_schema.statistics
    WHERE table_schema = DATABASE() AND table_name = p_table AND index_name = p_index
  ) THEN
    SET @ddl = CONCAT('ALTER TABLE ', p_table, ' ADD ', p_definition);
    PREPARE stmt FROM @ddl;
    EXECUTE stmt;
    DEALLOCATE PREPARE stmt;
  END IF;
END$$
DELIMITER ;

-- 会签任务分组：非会签节点三列为空（ADR 0003）
CALL approval_phase2_add_column('approval_task', 'group_key',
  'group_key VARCHAR(40) DEFAULT NULL COMMENT ''会签组标识'' AFTER opinion');
CALL approval_phase2_add_column('approval_task', 'group_name',
  'group_name VARCHAR(100) DEFAULT NULL COMMENT ''会签组显示名'' AFTER group_key');
CALL approval_phase2_add_column('approval_task', 'group_seq',
  'group_seq INT DEFAULT NULL COMMENT ''会签组展示顺序'' AFTER group_name');

-- 列表标题与检索文本：由单据实现计算落库，列表/检索不再按 doc_type 分支（ADR 0007）
CALL approval_phase2_add_column('approval_instance', 'title',
  'title VARCHAR(200) DEFAULT NULL COMMENT ''列表显示标题'' AFTER biz_id');
CALL approval_phase2_add_column('approval_instance', 'search_text',
  'search_text VARCHAR(500) DEFAULT NULL COMMENT ''关键词检索文本'' AFTER title');

-- 回填唯一性检索用：同类单据按 flow_code 过滤
CALL approval_phase2_add_index('approval_instance', 'idx_flow',
  'KEY idx_flow (tenant_id, flow_code, status)');

-- 字段改值历史（ADR 0006）
CREATE TABLE IF NOT EXISTS approval_field_change (
  id BIGINT NOT NULL AUTO_INCREMENT,
  tenant_id INT NOT NULL DEFAULT 10150,
  instance_id BIGINT NOT NULL,
  task_id BIGINT DEFAULT NULL,
  node_key VARCHAR(40) DEFAULT NULL,
  field_key VARCHAR(40) NOT NULL,
  field_label VARCHAR(100) DEFAULT NULL,
  old_value VARCHAR(500) DEFAULT NULL,
  new_value VARCHAR(500) DEFAULT NULL,
  operator_id INT NOT NULL,
  operator_name VARCHAR(100) DEFAULT NULL,
  round INT NOT NULL,
  create_time DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (id),
  KEY idx_instance (instance_id, create_time),
  KEY idx_field (tenant_id, field_key, new_value)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='审批字段改值历史';

-- 老数据回填：一期实例没有 title/search_text（幂等，只补空值）
UPDATE approval_instance i
JOIN approval_completion_form f ON f.instance_id = i.id
SET i.title = f.name,
    i.search_text = CONCAT_WS(' ', f.name, f.implement_org, f.service_content)
WHERE i.title IS NULL;

UPDATE approval_instance i
JOIN approval_coordination_form c ON c.instance_id = i.id
SET i.title = c.title,
    i.search_text = CONCAT_WS(' ', c.title, c.content, c.remark)
WHERE i.title IS NULL;

DROP PROCEDURE IF EXISTS approval_phase2_add_column;
DROP PROCEDURE IF EXISTS approval_phase2_add_index;