import type { Kysely } from "kysely";
import { execDdl } from "../src/migration-helpers.ts";

// 下载调度卡死修复(docs/plan/system-review.md ③):
// - missing_since / missing_count:qB 列表与按 hash 查都查不到时先记缺席,连续多轮才判 removed,中途出现即清零
// - generation:同一 (实例, hash) 的 removed 行被再次提交 / 接管而复活时 +1,完成事件幂等键随之换代,
//   复活后的完成仍能触发整理
// biome-ignore lint/suspicious/noExplicitAny: 迁移不依赖应用表类型
export async function up(db: Kysely<any>): Promise<void> {
  await execDdl(
    db,
    `alter table download_task add column if not exists missing_since timestamptz;
     alter table download_task add column if not exists missing_count integer not null default 0;
     alter table download_task add column if not exists generation integer not null default 0;`,
  );
}
// biome-ignore lint/suspicious/noExplicitAny: 同上
export async function down(db: Kysely<any>): Promise<void> {
  await execDdl(
    db,
    `alter table download_task drop column if exists missing_since;
     alter table download_task drop column if exists missing_count;
     alter table download_task drop column if exists generation;`,
  );
}