import { SETTINGS_SECTIONS, type SettingsSectionId } from "@umt/contracts";
import { BUDGET_CARD, IDENTITY_CARD } from "./acquire.tsx";
import { ADVANCED_CARD, BUDGET_CARD as AGENT_BUDGET_CARD, INVESTIGATE_CARD, RUNTIME_CARD } from "./agent.tsx";
import { WEBSEARCH_CARD } from "./agent-websearch.tsx";
import { IMAGES_CARD, TMDB_CACHE_CARD, TTL_CARD } from "./cache.tsx";
import { CACHE_CARD, SEEDING_CARD } from "./downloaders.tsx";
import { LANGUAGE_CARD, TMDB_CARD } from "./metadata.tsx";
import { ORGANIZE_CARD, SCRAPE_CARD } from "./organize.tsx";
import type { CardSpec } from "./settings-card.tsx";
import { DEFAULTS_CARD, NETWORK_CARD } from "./sites.tsx";
import { STORAGE_BUDGET_CARD, STORAGE_RETENTION_CARD, WORKER_LANES_CARD } from "./system.tsx";

// 设置页搜索:分区名、节名、节的别名(contracts keywords)、各节表单字段名。
// 选中字段时页面滚到该节并聚焦字段(控件 id = `f-<字段名>`)。

/** 表单卡片 → 所在分区;新增卡片时在这里登记,测试会核对锚点存在且字段都在页面上 */
export const SETTINGS_CARDS: readonly [SettingsSectionId, CardSpec][] = [
  ["downloaders", CACHE_CARD],
  ["downloaders", SEEDING_CARD],
  ["sites", DEFAULTS_CARD],
  ["sites", NETWORK_CARD],
  ["metadata", TMDB_CARD],
  ["metadata", LANGUAGE_CARD],
  ["acquire", BUDGET_CARD],
  ["acquire", IDENTITY_CARD],
  ["organize", ORGANIZE_CARD],
  ["organize", SCRAPE_CARD],
  ["agent", AGENT_BUDGET_CARD],
  ["agent", INVESTIGATE_CARD],
  ["agent", RUNTIME_CARD],
  ["agent", WEBSEARCH_CARD],
  ["agent", ADVANCED_CARD],
  ["system", WORKER_LANES_CARD],
  ["system", STORAGE_BUDGET_CARD],
  ["system", STORAGE_RETENTION_CARD],
  ["cache", TMDB_CACHE_CARD],
  ["cache", IMAGES_CARD],
  ["cache", TTL_CARD],
];

export type SettingsSearchHit = {
  key: string;
  /** 命中的名字(字段名 / 节名 / 分区名) */
  label: string;
  section: SettingsSectionId;
  anchor: string | null;
  /** 表单字段名(控件 id 为 `f-<field>`) */
  field: string | null;
  /** 位置:分区 › 节 */
  where: string;
};

type Entry = SettingsSearchHit & { terms: string[] };

function buildIndex(): Entry[] {
  const out: Entry[] = [];
  for (const s of SETTINGS_SECTIONS) {
    out.push({
      key: s.id,
      label: s.label,
      section: s.id,
      anchor: null,
      field: null,
      where: s.description,
      terms: [s.label],
    });
    for (const a of s.anchors) {
      out.push({
        key: `${s.id}/${a.id}`,
        label: a.label,
        section: s.id,
        anchor: a.id,
        field: null,
        where: s.label,
        terms: [a.label, ...(a.keywords ?? [])],
      });
    }
  }
  for (const [sid, card] of SETTINGS_CARDS) {
    const s = SETTINGS_SECTIONS.find((x) => x.id === sid);
    const a = s?.anchors.find((x) => x.id === card.anchor);
    for (const f of card.fields) {
      out.push({
        key: `${sid}/${card.anchor}/${f.name}`,
        label: f.label,
        section: sid,
        anchor: card.anchor,
        field: f.name,
        where: `${s?.label ?? sid} › ${a?.label ?? card.title}`,
        terms: [f.label],
      });
    }
  }
  return out;
}

let INDEX: Entry[] | null = null;

const norm = (v: string) => v.toLowerCase().replace(/[\s（）()「」:：、，,]/g, "");

/** 按名字找设置:名字开头命中排前,其次包含;同一位置只留一条 */
export function searchSettings(query: string, limit = 8): SettingsSearchHit[] {
  const q = norm(query);
  if (!q) return [];
  INDEX ??= buildIndex();
  const scored: [number, Entry][] = [];
  for (const e of INDEX) {
    let best = -1;
    for (const [i, t] of e.terms.entries()) {
      const n = norm(t);
      const score = n === q ? 3 : n.startsWith(q) ? 2 : n.includes(q) ? 1 : -1;
      // 别名命中比名字本身命中低一档
      const adj = score < 0 ? -1 : i === 0 ? score + 0.5 : score;
      best = Math.max(best, adj);
    }
    if (best >= 0) scored.push([best, e]);
  }
  scored.sort((a, b) => b[0] - a[0]);
  const seen = new Set<string>();
  const hits: SettingsSearchHit[] = [];
  for (const [, { terms: _t, ...hit }] of scored) {
    if (seen.has(hit.key)) continue;
    seen.add(hit.key);
    hits.push(hit);
    if (hits.length >= limit) break;
  }
  return hits;
}