-- +goose Up

-- 客服会话按业务场景拆分（同一用户可同时有平台客服 / 摸大红客服等）
ALTER TABLE chat_conversations
  ADD COLUMN support_scene VARCHAR(32) NOT NULL DEFAULT '' COMMENT '客服场景: general/mohong 等，非客服会话为空' AFTER type;

UPDATE chat_conversations
SET support_scene = 'general'
WHERE type = 'general_support' AND (support_scene = '' OR support_scene IS NULL);

CREATE INDEX idx_chat_conversations_type_scene ON chat_conversations (type, support_scene);

-- 摸大红客服分组（成员可在后台「客服分组」中调整；默认挂入所有 cs 角色）
INSERT INTO chat_support_groups (code, name, description, status, sort_order) VALUES
('mohong', '摸大红-客服', '用户从摸大红入口联系客服时，按本组成员在线与负载分配', 'active', 30)
ON DUPLICATE KEY UPDATE
  name = VALUES(name),
  description = VALUES(description),
  sort_order = VALUES(sort_order);

INSERT IGNORE INTO chat_support_group_members (group_id, admin_user_id)
SELECT g.id, au.id
FROM chat_support_groups g
JOIN admin_user_roles aur ON 1 = 1
JOIN roles r ON r.id = aur.role_id
JOIN admin_users au ON au.id = aur.admin_user_id
WHERE g.code = 'mohong'
  AND r.code = 'cs'
  AND au.status = 'active';

-- +goose Down

DELETE gm FROM chat_support_group_members gm
JOIN chat_support_groups g ON g.id = gm.group_id
WHERE g.code = 'mohong';

DELETE FROM chat_support_groups WHERE code = 'mohong';

DROP INDEX idx_chat_conversations_type_scene ON chat_conversations;

ALTER TABLE chat_conversations DROP COLUMN support_scene;