import { z } from "zod";
import { Id, NonNegInt, Timestamp } from "./common.ts";
import { MediaEntityStatus, MediaKind } from "./content.ts";
import { ManualAcquisitionRequest } from "./execution.ts";
import { InventoryEntry, SlotStatusCounts } from "./organization.ts";

// 全局搜索(W9-G,对标 MP 顶栏搜索 + 资源搜索页):
// GET /search 聚合本地作品 / TMDB 候选 / 跨站资源 / 页面与操作;GET /search/releases 是资源结果页(筛选/排序/游标,复用同一缓存)。

export const SearchScope = z.enum(["all", "media", "releases", "actions"]);
export type SearchScope = z.infer<typeof SearchScope>;

export const SearchQuery = z.object({
  q: z.string().trim().min(1).max(200),
  /** all = 四组都查;命令面板先查 media/actions(快),资源组单独查(最慢一站可达 15s) */
  scope: SearchScope.default("all"),
  /** 每组最多返回条数 */
  limit: z.coerce.number().int().min(1).max(50).default(10),
});
export type SearchQuery = z.infer<typeof SearchQuery>;

// ── 本地作品 ──

export const LocalMediaHit = z.object({
  entity: z.object({
    id: Id,
    kind: MediaKind,
    title: z.string(),
    originalTitle: z.string().nullable(),
    year: z.number().int().nullable(),
    status: MediaEntityStatus,
  }),
  /** 0–1;精确命中 1,名称前缀 ≥ 0.9,其余为 trgm 相似度 */
  score: z.number(),
  matchedBy: z.enum(["exact", "prefix", "similar"]),
  /** 命中的别名原文(可能是译名/原名/别名) */
  matchedAlias: z.string().nullable(),
  /** 版本目标状态摘要 + 库存 */
  slotCounts: SlotStatusCounts,
  versionCount: NonNegInt,
  downloadingCount: NonNegInt,
  subscribed: z.boolean(),
});
export type LocalMediaHit = z.infer<typeof LocalMediaHit>;

export const TmdbCandidate = z.object({
  provider: z.literal("tmdb"),
  entityType: z.enum(["movie", "tv"]),
  externalId: z.string(),
  title: z.string(),
  originalTitle: z.string().nullable(),
  year: z.number().int().nullable(),
  overview: z.string().nullable(),
  popularity: z.number().nullable(),
  /** 已有本地作品接受了这个 TMDB 身份时给出(跟随合并跳转),前端显示"查看"而不是"订阅" */
  localEntityId: Id.nullable(),
});
export type TmdbCandidate = z.infer<typeof TmdbCandidate>;

// ── 跨站资源 ──

export const SearchReleaseParsed = z.object({
  titleCn: z.string().nullable(),
  titleEn: z.string().nullable(),
  year: z.number().int().nullable(),
  season: z.number().int().nullable(),
  episodes: z.object({ start: z.number().int(), end: z.number().int() }).nullable(),
  resolution: z.string().nullable(),
  source: z.string().nullable(),
  videoCodec: z.string().nullable(),
  hdr: z.array(z.string()),
  releaseGroup: z.string().nullable(),
});
export type SearchReleaseParsed = z.infer<typeof SearchReleaseParsed>;

/**
 * 库存叠加状态(只在关联到作品时给出):
 * downloading 有下载中任务 > gap 有未满足的版本目标 > owned 已有版本 > subscribed 只有订阅 > none 作品已登记但无库存/目标
 */
export const SearchInventoryState = z.enum(["downloading", "gap", "owned", "subscribed", "none"]);
export type SearchInventoryState = z.infer<typeof SearchInventoryState>;

export const SearchReleaseInventory = InventoryEntry.extend({
  state: SearchInventoryState,
});
export type SearchReleaseInventory = z.infer<typeof SearchReleaseInventory>;

export const SearchRelease = z.object({
  /** `${siteId}:${siteReleaseId}`,前端列表 key */
  key: z.string(),
  /** 结果已写入资源表(source_release)的 ID;站点工作台 / 下载 / 委托 Agent 用它 */
  sourceReleaseId: Id.nullable(),
  siteId: Id,
  siteName: z.string(),
  siteReleaseId: z.string(),
  title: z.string(),
  subtitle: z.string().nullable(),
  category: z.object({ id: z.string().nullable(), name: z.string().nullable() }),
  sizeBytes: NonNegInt.nullable(),
  seeders: z.number().int().nullable(),
  leechers: z.number().int().nullable(),
  snatched: z.number().int().nullable(),
  promotion: z.object({
    type: z.string(),
    downloadFactor: z.number().nullable(),
    uploadFactor: z.number().nullable(),
    expiresAt: Timestamp.nullable(),
  }),
  /** 下载计量为 0(免费 / 2x 免费) */
  free: z.boolean(),
  /** H&R 三态;unknown 在清理判定中按有义务处理 */
  hr: z.union([z.boolean(), z.literal("unknown")]),
  uploadedAt: Timestamp.nullable(),
  /** 不含凭证的详情页 */
  detailUrl: z.string(),
  observedAt: Timestamp,
  parsed: SearchReleaseParsed,
  mediaEntityId: Id.nullable(),
  /** resolved = 资源已识别到作品;alias = 解析出的标题精确命中唯一作品别名(未确认) */
  entityMatch: z.enum(["resolved", "alias"]).nullable(),
  entity: z.object({ id: Id, title: z.string(), year: z.number().int().nullable(), kind: MediaKind }).nullable(),
  /** 库存叠加;candidateReasons 只保留针对本条资源的评估 */
  inventory: SearchReleaseInventory.nullable(),
});
export type SearchRelease = z.infer<typeof SearchRelease>;

export const SearchSiteStatus = z.enum(["ok", "failed", "timeout", "skipped"]);
export type SearchSiteStatus = z.infer<typeof SearchSiteStatus>;

export const SearchSiteCoverage = z.object({
  siteId: Id,
  siteName: z.string(),
  status: SearchSiteStatus,
  count: NonNegInt,
  tookMs: NonNegInt,
  /** 失败/超时/跳过原因(已脱敏) */
  error: z.string().nullable(),
});
export type SearchSiteCoverage = z.infer<typeof SearchSiteCoverage>;

/** 跨站搜索的覆盖信息:部分站点失败不影响其它站点结果 */
export const SearchReleaseCoverage = z.object({
  /** 有站点失败/超时 */
  partial: z.boolean(),
  sites: z.array(SearchSiteCoverage),
  failedSites: z.array(SearchSiteCoverage),
  /** 命中 30s 短缓存 */
  cached: z.boolean(),
  /** 与同时进行的相同搜索合并(没有重复请求站点) */
  coalesced: z.boolean(),
  /** 站点结果抓取时间 */
  fetchedAt: Timestamp,
});
export type SearchReleaseCoverage = z.infer<typeof SearchReleaseCoverage>;

// ── 页面与操作跳转(命令面板) ──

export const SearchAction = z.object({
  id: z.string(),
  kind: z.enum(["page", "action"]),
  /** 分组(导航一级分类):概览 / 资源 / 订阅 / 整理 / 系统 */
  group: z.string(),
  title: z.string(),
  /** 控制台内相对路径 */
  href: z.string(),
  keywords: z.array(z.string()),
});
export type SearchAction = z.infer<typeof SearchAction>;

export const SearchGroupBase = z.object({ tookMs: NonNegInt });

export const SearchResponse = z.object({
  q: z.string(),
  scope: SearchScope,
  media: z
    .object({
      local: SearchGroupBase.extend({ items: z.array(LocalMediaHit) }),
      tmdb: SearchGroupBase.extend({
        items: z.array(TmdbCandidate),
        /** 未配置 TMDB 时为 false(不是"没有结果") */
        configured: z.boolean(),
        error: z.string().nullable(),
      }),
    })
    .nullable(),
  releases: SearchGroupBase.extend({
    items: z.array(SearchRelease),
    /** 全部站点结果条数(items 只取前 limit 条,完整列表走 /search/releases) */
    total: NonNegInt,
  })
    .extend(SearchReleaseCoverage.shape)
    .nullable(),
  actions: SearchGroupBase.extend({ items: z.array(SearchAction) }).nullable(),
  tookMs: NonNegInt,
});
export type SearchResponse = z.infer<typeof SearchResponse>;

// ── 资源结果页 ──

const csv = z.string().max(4000).optional();
const bool = z.enum(["true", "false"]).optional();

export const ReleaseSearchSort = z.enum(["default", "seeders", "size", "uploadedAt", "site"]);
export type ReleaseSearchSort = z.infer<typeof ReleaseSearchSort>;

export const ReleaseSearchQuery = z.object({
  q: z.string().trim().min(1).max(200),
  /** 逗号分隔的站点 ID */
  sites: csv,
  /** 逗号分隔:2160p,1080p… */
  resolution: csv,
  /** 逗号分隔:REMUX,WEB-DL,BluRay… */
  source: csv,
  /** 字节 */
  minSize: z.coerce.number().int().nonnegative().optional(),
  maxSize: z.coerce.number().int().nonnegative().optional(),
  /** true 只要免费;false 排除免费 */
  free: bool,
  /** true 只要 H&R;false 排除明确 H&R 的(unknown 保留) */
  hr: bool,
  /** default = 做种数降序、同分按发布时间新→旧 */
  sort: ReleaseSearchSort.default("default"),
  order: z.enum(["asc", "desc"]).default("desc"),
  /** true 跳过 30s 缓存重新查站点(仍会合并并发) */
  refresh: bool,
  cursor: z.string().min(1).optional(),
  limit: z.coerce.number().int().min(1).max(200).default(50),
});
export type ReleaseSearchQuery = z.infer<typeof ReleaseSearchQuery>;

export const FacetCount = z.object({ value: z.string(), label: z.string(), count: NonNegInt });
export type FacetCount = z.infer<typeof FacetCount>;

export const ReleaseSearchPage = z
  .object({
    q: z.string(),
    items: z.array(SearchRelease),
    nextCursor: z.string().nullable(),
    /** 筛选后的条数 */
    total: NonNegInt,
    /** 未筛选的全部条数 */
    unfilteredTotal: NonNegInt,
    /** 筛选项计数(基于未筛选的全部结果) */
    facets: z.object({
      sites: z.array(FacetCount),
      resolutions: z.array(FacetCount),
      sources: z.array(FacetCount),
    }),
    tookMs: NonNegInt,
  })
  .extend(SearchReleaseCoverage.shape);
export type ReleaseSearchPage = z.infer<typeof ReleaseSearchPage>;

export const SearchReleaseParams = z.object({ siteId: Id, siteReleaseId: z.string().min(1).max(200) });
export type SearchReleaseParams = z.infer<typeof SearchReleaseParams>;

/** 从搜索结果直接下载:与 POST /acquisition-plans 同一请求体,资源由路径定位 */
export const SearchReleasePlanRequest = ManualAcquisitionRequest.omit({ sourceReleaseId: true });
export type SearchReleasePlanRequest = z.infer<typeof SearchReleasePlanRequest>;