import type { JsonObject, SourceRelease, SourceReleaseCreate } from "@umt/contracts";
import type { ParsedRelease } from "@umt/domain";
import { toParsedColumns } from "./release.ts";

// 站点资源(adapters 的 SiteRelease)↔ source_release。
// mapping 不依赖 adapters:这里用结构相同的 SiteReleaseLike,adapters 的 SiteRelease 可直接传入
// (apps/server/test/mapping-compat.test.ts 在类型层校验两者兼容)。

export type SitePromotionType = "none" | "free" | "2xfree" | "50%" | "2x50%" | "30%" | "2x" | "unknown";

export interface SiteReleaseLike {
  /** 适配器侧的站点标识(可能是站点 key);落库时用 site 行 UUID 覆盖 */
  siteId: string;
  siteReleaseId: string;
  title: string;
  subtitle?: string;
  category: { id: string | null; name: string | null };
  sizeBytes: number | null;
  seeders: number | null;
  leechers: number | null;
  snatched: number | null;
  promotion: {
    type: SitePromotionType;
    downloadFactor: number | null;
    uploadFactor: number | null;
    expiresAt: string | null;
  };
  hr: boolean | "unknown";
  uploadedAt: string | null;
  detailUrl: string;
  downloadUrl?: string;
  infoHash?: string;
  imdbId?: string;
  doubanId?: string;
  bangumiId?: string;
  tags: string[];
  raw: Record<string, unknown>;
  observedAt: string;
}

const HEX40 = /^[0-9a-f]{40}$/;
const HEX64 = /^[0-9a-f]{64}$/;
const PROMOTION_TYPES: readonly SitePromotionType[] = [
  "none",
  "free",
  "2xfree",
  "50%",
  "2x50%",
  "30%",
  "2x",
  "unknown",
];

/**
 * SiteRelease → source_release 新建/upsert 输入(按 siteId + siteReleaseId upsert)。
 * - siteId 取 site 行 UUID(opts.siteId),不是适配器里的站点 key;
 * - downloadUrl 不入库(可能需要 cookie 或含一次性令牌,下载时现场向适配器取);
 * - H&R、完成数、详情页、外部 ID 等无专门列的字段放进 raw._site。
 */
export function siteReleaseToSourceRelease(
  r: SiteReleaseLike,
  opts: { siteId: string; parsed?: ParsedRelease },
): SourceReleaseCreate {
  const hash = r.infoHash?.toLowerCase();
  const site: JsonObject = {
    adapterSiteId: r.siteId,
    categoryName: r.category.name,
    hr: r.hr,
    snatched: r.snatched,
    detailUrl: r.detailUrl,
    ...(r.imdbId ? { imdbId: r.imdbId } : {}),
    ...(r.doubanId ? { doubanId: r.doubanId } : {}),
    ...(r.bangumiId ? { bangumiId: r.bangumiId } : {}),
  };
  return {
    siteId: opts.siteId,
    siteReleaseId: r.siteReleaseId,
    title: r.title,
    subtitle: r.subtitle ?? null,
    categoryRaw: r.category.id ?? r.category.name,
    tagsRaw: [...r.tags],
    sizeBytes: r.sizeBytes,
    infohashV1: hash && HEX40.test(hash) ? hash : null,
    infohashV2: hash && HEX64.test(hash) ? hash : null,
    promotion: {
      kind: r.promotion.type,
      observedAt: r.observedAt,
      expiresAt: r.promotion.expiresAt,
      raw: { downloadFactor: r.promotion.downloadFactor, uploadFactor: r.promotion.uploadFactor },
    },
    promotionExpiresAt: r.promotion.expiresAt,
    seeders: r.seeders,
    leechers: r.leechers,
    sourcePublishedAt: r.uploadedAt,
    ...(opts.parsed ? toParsedColumns(opts.parsed) : {}),
    raw: { ...r.raw, _site: site },
  };
}

/** source_release 行 → SiteReleaseLike(站点工作台从本地快照展示时用);缺失字段按"未知"还原 */
export function sourceReleaseToSiteRelease(row: SourceRelease): SiteReleaseLike {
  const { _site, ...raw } = row.raw as JsonObject & { _site?: JsonObject };
  const site = _site ?? {};
  const promoRaw = (row.promotion.raw ?? {}) as { downloadFactor?: number | null; uploadFactor?: number | null };
  const kind = row.promotion.kind as SitePromotionType | undefined;
  const str = (v: unknown) => (typeof v === "string" ? v : undefined);
  const hr = site.hr === true || site.hr === false ? site.hr : "unknown";
  const imdbId = str(site.imdbId);
  const doubanId = str(site.doubanId);
  const infoHash = row.infohashV1 ?? row.infohashV2 ?? undefined;
  return {
    siteId: str(site.adapterSiteId) ?? row.siteId,
    siteReleaseId: row.siteReleaseId,
    title: row.title,
    ...(row.subtitle !== null ? { subtitle: row.subtitle } : {}),
    category: { id: row.categoryRaw, name: str(site.categoryName) ?? null },
    sizeBytes: row.sizeBytes,
    seeders: row.seeders,
    leechers: row.leechers,
    snatched: typeof site.snatched === "number" ? site.snatched : null,
    promotion: {
      type: kind && PROMOTION_TYPES.includes(kind) ? kind : "unknown",
      downloadFactor: promoRaw.downloadFactor ?? null,
      uploadFactor: promoRaw.uploadFactor ?? null,
      expiresAt: row.promotionExpiresAt,
    },
    hr,
    uploadedAt: row.sourcePublishedAt,
    detailUrl: str(site.detailUrl) ?? "",
    ...(infoHash ? { infoHash } : {}),
    ...(imdbId ? { imdbId } : {}),
    ...(doubanId ? { doubanId } : {}),
    tags: [...row.tagsRaw],
    raw,
    observedAt: row.lastSeenAt,
  };
}