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

// W4-A 候选评估记录去重:同一 (acquisition_slot, source_release) 只保留最新一条(artifact title=candidate_evaluation)。
// 先清掉历史重复(保留 updated_at 最新的一条),再加唯一表达式索引,写入端按该键 upsert。

// 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,
    `
delete from artifact a
 using artifact b
 where a.title = 'candidate_evaluation' and b.title = 'candidate_evaluation'
   and a.subject_type = 'acquisition_slot' and b.subject_type = 'acquisition_slot'
   and a.subject_id = b.subject_id
   and (a.content->>'sourceReleaseId') = (b.content->>'sourceReleaseId')
   and (a.updated_at, a.id) < (b.updated_at, b.id);
create unique index artifact_candidate_slot_release
    on artifact (subject_id, (content->>'sourceReleaseId'))
 where title = 'candidate_evaluation' and subject_type = 'acquisition_slot';
`,
  );
}

// biome-ignore lint/suspicious/noExplicitAny: 同上
export async function down(db: Kysely<any>): Promise<void> {
  await execDdl(db, "drop index if exists artifact_candidate_slot_release;");
}