import { z } from "zod";
import { EntityBase, Id, JsonObject, SERVER_MANAGED, Timestamp } from "./common";

// 实例域:媒体库根、下载器实例、媒体服务器实例、路径映射(REQ §7.1、§8.4、§12.5)
// 凭证只以 secretRef 暴露;创建/更新时的 credential 是只写明文,服务端加密为 secret 后丢弃。

export const InstanceHealth = z.enum(["unknown", "healthy", "degraded", "offline"]);
export type InstanceHealth = z.infer<typeof InstanceHealth>;

export const LibraryMediaKind = z.enum(["movie", "series", "variety", "mixed", "other"]);
export type LibraryMediaKind = z.infer<typeof LibraryMediaKind>;

/** register_only:只登记不自动维护;managed:允许按策略补齐/升级(REQ §6.6) */
export const ManagementMode = z.enum(["register_only", "managed"]);
export type ManagementMode = z.infer<typeof ManagementMode>;

export const LibraryRoot = EntityBase.extend({
  name: z.string().min(1),
  mediaKind: LibraryMediaKind,
  /** 执行进程可访问的绝对路径 */
  localPath: z.string().startsWith("/"),
  managementMode: ManagementMode,
  enabled: z.boolean(),
  sentinelFile: z.string().nullable(),
  healthStatus: InstanceHealth,
  lastHealthAt: Timestamp.nullable(),
  healthDetail: JsonObject,
  notes: z.string().nullable(),
});
export type LibraryRoot = z.infer<typeof LibraryRoot>;
export const LibraryRootCreate = LibraryRoot.pick({
  name: true,
  mediaKind: true,
  localPath: true,
  managementMode: true,
  enabled: true,
  sentinelFile: true,
  notes: true,
}).partial({ mediaKind: true, managementMode: true, enabled: true, sentinelFile: true, notes: true });
export type LibraryRootCreate = z.infer<typeof LibraryRootCreate>;
export const LibraryRootUpdate = LibraryRootCreate.partial();
export type LibraryRootUpdate = z.infer<typeof LibraryRootUpdate>;

/** 只写凭证:明文仅在请求中出现,绝不回显 */
const Credential = z.string().min(1).max(4096);

export const DownloaderKind = z.enum(["qbittorrent"]);
export type DownloaderKind = z.infer<typeof DownloaderKind>;

export const DownloaderInstance = EntityBase.extend({
  name: z.string().min(1),
  kind: DownloaderKind,
  baseUrl: z.url(),
  username: z.string().nullable(),
  secretRef: Id.nullable(),
  /** 管理标签名(REQ §8.4) */
  managedTag: z.string().min(1),
  /** 共享缓存卷标识:多 qB 共用同一卷时按此汇总水位 */
  cacheVolumeKey: z.string().nullable(),
  enabled: z.boolean(),
  healthStatus: InstanceHealth,
  lastSeenAt: Timestamp.nullable(),
  versionInfo: JsonObject,
  settings: JsonObject,
});
export type DownloaderInstance = z.infer<typeof DownloaderInstance>;
export const DownloaderInstanceCreate = DownloaderInstance.pick({
  name: true,
  kind: true,
  baseUrl: true,
  username: true,
  managedTag: true,
  cacheVolumeKey: true,
  enabled: true,
  settings: true,
})
  .partial({ kind: true, username: true, managedTag: true, cacheVolumeKey: true, enabled: true, settings: true })
  .extend({ credential: Credential.optional() });
export type DownloaderInstanceCreate = z.infer<typeof DownloaderInstanceCreate>;
export const DownloaderInstanceUpdate = DownloaderInstanceCreate.partial();
export type DownloaderInstanceUpdate = z.infer<typeof DownloaderInstanceUpdate>;

export const MediaServerKind = z.enum(["emby", "jellyfin"]);
export type MediaServerKind = z.infer<typeof MediaServerKind>;

export const MediaServerInstance = EntityBase.extend({
  name: z.string().min(1),
  kind: MediaServerKind,
  baseUrl: z.url(),
  userId: z.string().nullable(),
  secretRef: Id.nullable(),
  enabled: z.boolean(),
  healthStatus: InstanceHealth,
  lastSeenAt: Timestamp.nullable(),
  versionInfo: JsonObject,
  settings: JsonObject,
});
export type MediaServerInstance = z.infer<typeof MediaServerInstance>;
export const MediaServerInstanceCreate = MediaServerInstance.pick({
  name: true,
  kind: true,
  baseUrl: true,
  userId: true,
  enabled: true,
  settings: true,
})
  .partial({ kind: true, userId: true, enabled: true, settings: true })
  .extend({ credential: Credential.optional() });
export type MediaServerInstanceCreate = z.infer<typeof MediaServerInstanceCreate>;
export const MediaServerInstanceUpdate = MediaServerInstanceCreate.partial();
export type MediaServerInstanceUpdate = z.infer<typeof MediaServerInstanceUpdate>;

export const PathViewKind = z.enum(["downloader", "media_server"]);
export type PathViewKind = z.infer<typeof PathViewKind>;
export const PathMappingVerifyStatus = z.enum(["unverified", "ok", "failed"]);
export type PathMappingVerifyStatus = z.infer<typeof PathMappingVerifyStatus>;

/** 下载器/媒体服务器路径视图 → 执行进程可访问路径的前缀映射(REQ §12.5) */
export const PathMapping = EntityBase.extend({
  viewKind: PathViewKind,
  downloaderInstanceId: Id.nullable(),
  mediaServerInstanceId: Id.nullable(),
  libraryRootId: Id.nullable(),
  remotePrefix: z.string().min(1),
  localPrefix: z.string().startsWith("/"),
  priority: z.number().int(),
  enabled: z.boolean(),
  verifyStatus: PathMappingVerifyStatus,
  verifiedAt: Timestamp.nullable(),
  verifyDetail: JsonObject,
});
export type PathMapping = z.infer<typeof PathMapping>;

const pathMappingOwnerOk = (v: {
  viewKind?: PathViewKind;
  downloaderInstanceId?: string | null;
  mediaServerInstanceId?: string | null;
}) =>
  v.viewKind === undefined ||
  (v.viewKind === "downloader"
    ? !!v.downloaderInstanceId && !v.mediaServerInstanceId
    : !!v.mediaServerInstanceId && !v.downloaderInstanceId);

const PathMappingInput = PathMapping.omit({
  ...SERVER_MANAGED,
  verifyStatus: true,
  verifiedAt: true,
  verifyDetail: true,
});
export const PathMappingCreate = PathMappingInput.partial({
  downloaderInstanceId: true,
  mediaServerInstanceId: true,
  libraryRootId: true,
  priority: true,
  enabled: true,
}).refine(pathMappingOwnerOk, { message: "viewKind 与实例 ID 不匹配" });
export type PathMappingCreate = z.infer<typeof PathMappingCreate>;
export const PathMappingUpdate = PathMappingInput.partial().refine(pathMappingOwnerOk, {
  message: "viewKind 与实例 ID 不匹配",
});
export type PathMappingUpdate = z.infer<typeof PathMappingUpdate>;