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

// 文件域:media_asset、asset_unit_coverage、asset_location、path_binding(REQ §7.1、§8.2、§12.2)
// 资产与位置分离;同一库根 + 有效相对路径不能被两个位置同时占用;
// path_binding 一旦建立不因元数据刷新改变,只有显式整理操作可替换(旧绑定标 superseded)。

// 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(
  "media_asset",
  `
  media_entity_id uuid references media_entity (id) on delete restrict,
  kind text not null ${oneOf("kind", ["video", "bluray_dir", "subtitle", "audio", "nfo", "image", "other"])},
  parent_asset_id uuid references media_asset (id) on delete restrict,
  size_bytes bigint,
  content_hash text,
  hash_algorithm text,
  sample_digest text,
  media_info jsonb not null default '{}'::jsonb,
  delivery jsonb not null default '{}'::jsonb,
  content_edition text,
  source_release_id uuid references source_release (id) on delete set null,
  status text not null default 'active' ${oneOf("status", ["active", "replaced", "retired", "missing"])},
  verified_at timestamptz`,
)}
create index media_asset_entity_idx on media_asset (media_entity_id) where media_entity_id is not null;
create index media_asset_parent_idx on media_asset (parent_asset_id) where parent_asset_id is not null;

${entityTable(
  "asset_unit_coverage",
  `
  media_asset_id uuid not null references media_asset (id) on delete cascade,
  content_unit_id uuid not null references content_unit (id) on delete restrict,
  coverage text not null default 'full' ${oneOf("coverage", ["full", "partial", "segment", "unknown"])},
  segment text ${oneOf("segment", ["full", "upper", "middle", "lower", "unknown"])},
  evidence jsonb not null default '{}'::jsonb,
  constraint asset_unit_coverage_key unique (media_asset_id, content_unit_id)`,
)}
create index asset_unit_coverage_unit_idx on asset_unit_coverage (content_unit_id);

${entityTable(
  "asset_location",
  `
  media_asset_id uuid not null references media_asset (id) on delete cascade,
  location_kind text not null default 'library' ${oneOf("location_kind", ["library", "download_cache", "hardlink", "external"])},
  library_root_id uuid references library_root (id) on delete restrict,
  downloader_instance_id uuid references downloader_instance (id) on delete set null,
  relative_path text not null,
  status text not null default 'available' ${oneOf("status", ["available", "unavailable", "suspected_missing", "confirmed_missing", "removed"])},
  is_primary boolean not null default false,
  size_bytes bigint,
  inode bigint,
  device bigint,
  mtime timestamptz,
  sidecar_of_location_id uuid references asset_location (id) on delete set null,
  last_seen_at timestamptz,
  last_checked_at timestamptz,
  check_detail jsonb not null default '{}'::jsonb,
  constraint asset_location_library_root_check check (location_kind <> 'library' or library_root_id is not null)`,
)}
create unique index asset_location_root_path_key on asset_location (library_root_id, relative_path)
  where status <> 'removed' and library_root_id is not null;
create index asset_location_asset_idx on asset_location (media_asset_id);
create index asset_location_check_idx on asset_location (last_checked_at) where status <> 'removed';

${entityTable(
  "path_binding",
  `
  media_entity_id uuid not null references media_entity (id) on delete restrict,
  content_unit_id uuid references content_unit (id) on delete restrict,
  season_number integer,
  binding_kind text not null ${oneOf("binding_kind", ["entity", "season"])},
  library_root_id uuid not null references library_root (id) on delete restrict,
  relative_path text not null,
  template_version text,
  status text not null default 'active' ${oneOf("status", ["active", "conflict", "superseded"])},
  bound_at timestamptz not null default now(),
  bound_by text,
  superseded_by_id uuid references path_binding (id) on delete set null,
  note text,
  constraint path_binding_kind_check check ((binding_kind = 'season') = (season_number is not null))`,
)}
create index path_binding_entity_season_idx on path_binding (media_entity_id, season_number);
create unique index path_binding_active_key on path_binding (media_entity_id, season_number) nulls not distinct
  where status = 'active';
create unique index path_binding_active_path_key on path_binding (library_root_id, relative_path)
  where status = 'active';
`,
  );
}

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