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

// W2-B 待识别池与身份治理(REQ §7.2、§7.5):
// - identity_candidate:每条 source_release 至多一条待识别记录,候选只存 JSON,不逐个建为正式作品;
//   失败保存原因、证据版本与下一次复查时间(有界退避),新证据到来时重试;
// - resolution_attempt:每次识别尝试的结果与证据版本(只追加);
// - identity_redirect:作品合并后的旧 ID 跳转历史(与 media_entity.merged_into_id 一致,可修订)。

const ACTOR = ["user", "agent", "system", "api_key"] as const;

// 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,
    `
${entityTable(
  "identity_candidate",
  `
  source_release_id uuid not null references source_release (id) on delete cascade,
  status text not null default 'pending' ${oneOf("status", ["pending", "resolved", "dismissed", "archived"])},
  reason text not null ${oneOf("reason", ["ambiguous", "no_match", "proposed", "lookup_failed"])},
  query jsonb not null default '{}'::jsonb,
  candidates jsonb not null default '[]'::jsonb,
  evidence_version text not null,
  attempts integer not null default 0,
  last_attempt_at timestamptz,
  next_review_at timestamptz,
  decision_id uuid references decision (id) on delete set null,
  resolved_media_entity_id uuid references media_entity (id) on delete set null,
  resolved_by text,
  resolved_at timestamptz,
  constraint identity_candidate_release_key unique (source_release_id)`,
)}
create index identity_candidate_review_idx on identity_candidate (next_review_at) where status = 'pending';
create index identity_candidate_status_idx on identity_candidate (status, updated_at desc);

${entityTable(
  "resolution_attempt",
  `
  source_release_id uuid not null references source_release (id) on delete cascade,
  observation_id uuid references observation (id) on delete set null,
  outcome text not null ${oneOf("outcome", ["auto", "proposed", "ambiguous", "no_match", "lookup_failed", "manual", "skipped_locked"])},
  reason text,
  evidence_version text not null,
  candidate_count integer not null default 0,
  media_entity_id uuid references media_entity (id) on delete set null,
  best jsonb,
  error jsonb,
  actor_type text not null default 'system' ${oneOf("actor_type", ACTOR)},
  actor_id text`,
)}
create index resolution_attempt_release_idx on resolution_attempt (source_release_id, created_at desc);

${entityTable(
  "identity_redirect",
  `
  from_entity_id uuid not null references media_entity (id) on delete cascade,
  to_entity_id uuid not null references media_entity (id) on delete cascade,
  reason text,
  actor_type text not null ${oneOf("actor_type", ACTOR)},
  actor_id text,
  constraint identity_redirect_from_key unique (from_entity_id),
  constraint identity_redirect_not_self check (from_entity_id <> to_entity_id)`,
)}
create index identity_redirect_to_idx on identity_redirect (to_entity_id);
`,
  );
}

// biome-ignore lint/suspicious/noExplicitAny: 同上
export async function down(db: Kysely<any>): Promise<void> {
  await execDdl(db, dropTables(["identity_redirect", "resolution_attempt", "identity_candidate"]));
}