/**
 * message 的 sys schema 表(编码规范 §7 / ADR-002)。
 */
import { index, jsonb, text, timestamp } from 'drizzle-orm/pg-core';
import { sys } from '@shared/db.ts';

export const messageTable = sys.table(
  'system_message',
  {
    id: text('id').primaryKey(),
    kind: text('kind').notNull(),
    staffId: text('staff_id').notNull(),
    positionId: text('position_id'),
    title: text('title').notNull(),
    body: text('body').notNull(),
    at: timestamp('at', { withTimezone: true }).notNull().defaultNow(),
    readAt: timestamp('read_at', { withTimezone: true }),
    /** 跨任务征答的卡体;驳回重答以 supersededBy 闭合原卡 —— 只增不改 */
    card: jsonb('card'),
    answer: jsonb('answer'),
    eventRef: text('event_ref'),
  },
  (t) => [index('message_staff_idx').on(t.staffId, t.at), index('message_unread_idx').on(t.staffId, t.readAt)],
);