"use client";

// 策略配置面板(run 工作台第 5 面板):面向运营的业务化视图,三个干净模块——
// ① 搜索 Prompt(只看发给大模型的原文)② 判定规则(红线/打分/入池线)③ 游走规则(扩展动作+总量去重)。
// 原始字段表留在 /config 工程页,本面板不再堆变量名/术语。只读、配置为全局当前值(非该 run 快照)。
import { useEffect, useState, type ReactNode } from "react";
import Link from "next/link";
import { Compass, FileText, Pencil, ShieldCheck, Table2 } from "lucide-react";
import { getConfigQueryPrompts, getConfigRulePacks, getConfigWalkPolicy } from "@/lib/api/client";
import type { ConfigFileResponse } from "@/lib/api/types";

type AnyRec = Record<string, unknown>;

function rec(v: unknown): AnyRec {
  return v && typeof v === "object" ? (v as AnyRec) : {};
}
function rows(v: unknown): AnyRec[] {
  return Array.isArray(v) ? (v as AnyRec[]) : [];
}
// walk_policy 值可能是裸值,也可能 {value,...} 包裹
function uw(v: unknown): unknown {
  return v && typeof v === "object" && "value" in (v as AnyRec) ? (v as AnyRec).value : v;
}
function n(v: unknown): number | null {
  const x = Number(uw(v));
  return Number.isFinite(x) ? x : null;
}

// 判定动作 → 业务文案 + 色板
const ACTION: Record<string, { cn: string; cls: string }> = {
  ADD_TO_CONTENT_POOL: { cn: "入池", cls: "pool" },
  KEEP_CONTENT_FOR_REVIEW: { cn: "转待复看", cls: "review" },
  REJECT_CONTENT: { cn: "淘汰", cls: "reject" },
  DO_NOT_EXPAND_AUTHOR: { cn: "不进作者主页", cls: "muted" }
};
// 数据完整性类红线的技术 label 软化成人话
const GATE_RELABEL: Record<string, string> = {
  missing_platform_content_id: "内容缺少 ID(抓取不完整)",
  missing_source_evidence: "缺少需求证据(无法溯源)",
  missing_platform_author_id: "缺少作者 ID(无法进主页)"
};

function ConfigBlock({
  icon,
  title,
  subtitle,
  editHint,
  loading,
  error,
  children
}: {
  icon: ReactNode;
  title: string;
  subtitle: string;
  editHint: string;
  loading: boolean;
  error: boolean;
  children: ReactNode;
}) {
  return (
    <section className="cfg-block">
      <div className="cfg-block-head">
        <div className="cfg-block-titles">
          <strong>{icon} {title}</strong>
          <span className="cfg-block-sub">{subtitle}</span>
        </div>
        <span className="cfg-edit-hint"><Pencil size={12} /> 改这里:{editHint}</span>
      </div>
      {loading ? (
        <div className="loading-state">加载中…</div>
      ) : error ? (
        <div className="error-state">这块配置加载失败(其余不受影响)。</div>
      ) : (
        children
      )}
    </section>
  );
}

// ===== ① 搜索 Prompt:只看原文 =====
function PromptModule({ data }: { data: AnyRec }) {
  const profiles = rec(data.profiles);
  const entries = Object.entries(profiles);
  if (!entries.length) return <div className="empty-state">暂无 Prompt 配置。</div>;
  return (
    <div className="cfg-prompt">
      {entries.map(([name, raw]) => {
        const p = rec(raw);
        return (
          <div className="cfg-prompt-profile" key={name}>
            {entries.length > 1 ? <div className="cfg-prompt-name">{name}</div> : null}
            <div className="cfg-prompt-block">
              <span className="cfg-prompt-tag">系统提示词 · System</span>
              <pre className="cfg-prompt-text">{String(p.system || "—")}</pre>
            </div>
            <div className="cfg-prompt-block">
              <span className="cfg-prompt-tag">用户提示词 · User</span>
              <pre className="cfg-prompt-text">{String(p.user || "—")}</pre>
            </div>
          </div>
        );
      })}
      <p className="cfg-hint-line">
        发给大模型的就是上面这两段原文。<code>{"{seed_term}"}</code>、<code>{"{evidence_context}"}</code> 等占位符会在运行时被真实内容替换。
      </p>
    </div>
  );
}

// ===== ② 判定规则:红线 / 打分 / 入池线 =====
function JudgeModule({ pack }: { pack: AnyRec | null }) {
  if (!pack) return <div className="empty-state">暂无判定规则。</div>;
  const gates = rows(pack.hard_gates);
  const dims = rows(rec(pack.scorecard).dimensions).filter((d) => String(d.runtime_status || "active") === "active");
  const thresholds = rows(pack.thresholds);
  const totalMax = dims.reduce((s, d) => s + (n(d.max_score) || 0), 0) || 100;

  return (
    <div className="cfg-judge">
      {/* 红线 */}
      <div className="cfg-sub">
        <div className="cfg-sub-title">红线 · 命中即处理(不进入打分)</div>
        <div className="cfg-gate-list">
          {gates.map((g, i) => {
            const act = ACTION[String(g.decision_action || "")] || { cn: String(g.decision_action || ""), cls: "muted" };
            const label = GATE_RELABEL[String(g.gate_id || "")] || String(g.label || g.gate_id || "");
            return (
              <div className="cfg-gate-row" key={i}>
                <span className="cfg-gate-label">{label}</span>
                <span className={`cfg-act ${act.cls}`}>{act.cn}</span>
              </div>
            );
          })}
        </div>
      </div>

      {/* 打分 */}
      <div className="cfg-sub">
        <div className="cfg-sub-title">怎么打分 · 满分 {totalMax}</div>
        <div className="cfg-score-bars">
          {dims.map((d, i) => {
            const max = n(d.max_score) || 0;
            return (
              <div className="cfg-score-item" key={i}>
                <div className="cfg-score-top">
                  <span>{String(d.label || d.key)}</span>
                  <strong>{max} 分</strong>
                </div>
                <div className="cfg-score-bar">
                  <span style={{ width: `${(max / totalMax) * 100}%` }} />
                </div>
              </div>
            );
          })}
        </div>
      </div>

      {/* 入池线 */}
      <div className="cfg-sub">
        <div className="cfg-sub-title">入池线 · 按总分落档</div>
        <div className="cfg-band-row">
          {thresholds.map((t, i) => {
            const act = ACTION[String(t.decision_action || "")] || { cn: String(t.decision_action || ""), cls: "muted" };
            const min = n(t.min_score);
            const max = n(t.max_score);
            const range = min != null && max != null ? `${min}–${max} 分` : "—";
            return (
              <div className={`cfg-band ${act.cls}`} key={i}>
                <span className="cfg-band-range">{range}</span>
                <strong className="cfg-band-act">{act.cn}</strong>
              </div>
            );
          })}
        </div>
      </div>
    </div>
  );
}

// ===== ③ 游走规则:起点判断 → 三种动作 → 拆标签后接着走 + 刹车 =====
type WalkAction = { title: string; desc: string; trigger: string; limits: string[] };

// edge_permissions 的放行值 → 业务文案
const PERM: Record<string, { cn: string; cls: string }> = {
  allow: { cn: "放行", cls: "pool" },
  allow_low_budget: { cn: "低预算放行", cls: "review" },
  deny: { cn: "不放行", cls: "reject" }
};
// 起点判断只看两种"发现型"游走(收入内容池属判定结果,不在此列)
const WALK_EDGES: Array<{ edge: string; label: string }> = [
  { edge: "author_to_works", label: "进作者主页" },
  { edge: "video_to_hashtag", label: "拆标签再搜" }
];
const VERDICTS: Array<{ key: string; cn: string; cls: string }> = [
  { key: "ADD_TO_CONTENT_POOL", cn: "入池", cls: "pool" },
  { key: "KEEP_CONTENT_FOR_REVIEW", cn: "待复看", cls: "review" },
  { key: "REJECT_CONTENT", cn: "淘汰", cls: "reject" }
];

function WalkModule({ data }: { data: AnyRec }) {
  const g = rec(data.global);
  const perm = rec(data.edge_permissions);
  const budgetById: Record<string, AnyRec> = {};
  rows(data.edge_budgets).forEach((b) => {
    budgetById[String(b.edge_id || "")] = b;
  });

  const limit = (edge: string, key: string, unit: string): string | null => {
    const v = n(budgetById[edge]?.[key]);
    return v == null ? null : `${unit} ${v}`;
  };

  const actions: WalkAction[] = [
    {
      title: "翻页继续搜",
      desc: "同一个搜索词,翻到下一页拿更多结果。",
      trigger: "任何搜索都可翻页(与判定结果无关)",
      limits: [limit("query_next_page", "max_per_query", "每个搜索最多翻"), limit("query_next_page", "max_total_actions", "整轮最多")].filter(Boolean) as string[]
    },
    {
      title: "进作者主页取作品",
      desc: "顺着这条内容的作者主页,再拿几条同作者作品。",
      trigger: "入池→正常进 · 待复看→只低预算探 · 淘汰→不进",
      limits: [limit("author_to_works", "max_works_per_author", "每个作者最多取"), limit("author_to_works", "max_total_actions", "整轮最多")].filter(Boolean) as string[]
    },
    {
      title: "从内容拆标签再搜",
      desc: "把内容里的标签拆出来,作为新搜索词继续找。",
      trigger: "仅「入池」内容、且标签强相关才会拆",
      limits: [limit("hashtag_to_query", "max_total_actions", "整轮最多")].filter(Boolean) as string[]
    }
  ];

  const totalActions = n(g.max_total_actions_per_run);
  const depth = n(g.max_depth);
  const reseedRounds = n(g.max_reseed_rounds);
  const geminiCap = n(g.gemini_calls_per_run_cap);

  return (
    <div className="cfg-walk">
      {/* A. 起点:用判定结果决定能不能继续游走 */}
      <div className="cfg-sub">
        <div className="cfg-sub-title">从哪种内容开始游走 · 由判定结果决定</div>
        <p className="cfg-walk-note">
          「好不好」不在这里另判,而是直接用上面②的判定结果:<strong>入池</strong>最优、放开游走;<strong>待复看</strong>只小范围探一探;<strong>淘汰</strong>到此为止。
        </p>
        <div className="cfg-perm-table">
          <div className="cfg-perm-head">
            <span>判定结果</span>
            {WALK_EDGES.map((e) => (
              <span key={e.edge}>{e.label}</span>
            ))}
          </div>
          {VERDICTS.map((v) => {
            const row = rec(perm[v.key]);
            return (
              <div className="cfg-perm-row" key={v.key}>
                <span className={`cfg-act ${v.cls}`}>{v.cn}</span>
                {WALK_EDGES.map((e) => {
                  const p = PERM[String(uw(row[e.edge]) || "deny")] || PERM.deny;
                  return (
                    <span className={`cfg-perm-cell ${p.cls}`} key={e.edge}>
                      {p.cn}
                    </span>
                  );
                })}
              </div>
            );
          })}
        </div>
      </div>

      {/* B. 三种游走动作 */}
      <div className="cfg-sub">
        <div className="cfg-sub-title">能往哪三个方向走</div>
        <div className="cfg-walk-actions">
          {actions.map((a) => (
            <div className="cfg-walk-card" key={a.title}>
              <div className="cfg-walk-card-head">
                <strong>{a.title}</strong>
              </div>
              <p className="cfg-walk-desc">{a.desc}</p>
              <div className="cfg-walk-trigger">触发:{a.trigger}</div>
              <div className="cfg-walk-limits">
                {a.limits.length ? a.limits.map((l, i) => <span key={i}>{l}</span>) : <span className="muted">无额外上限</span>}
              </div>
            </div>
          ))}
        </div>
      </div>

      {/* C. 拆标签之后接着往哪走 + 刹车 */}
      <div className="cfg-sub">
        <div className="cfg-sub-title">拆标签之后,怎么接着走</div>
        <div className="cfg-walk-chain">
          <span className="cfg-chain-step">入池内容拆出强相关标签</span>
          <span className="cfg-chain-arrow">→</span>
          <span className="cfg-chain-step">标签变成新的搜索词</span>
          <span className="cfg-chain-arrow">→</span>
          <span className="cfg-chain-step">这条新搜索重新走全流程:翻页 → 判定 → 对又判成入池的,再进作者主页 / 再拆标签</span>
          <span className="cfg-chain-arrow">↻</span>
          <span className="cfg-chain-step">如此层层深入,直到撞上下面的刹车</span>
        </div>
        <div className="cfg-walk-brakes">
          {depth != null ? <span>最多深入 <b>{depth}</b> 层</span> : null}
          {reseedRounds != null ? <span>拆标签再搜最多 <b>{reseedRounds}</b> 轮</span> : null}
          {totalActions != null ? <span>整轮最多 <b>{totalActions}</b> 个动作</span> : null}
          {geminiCap != null ? <span>大模型判定上限 <b>{geminiCap}</b> 次/轮</span> : null}
          <span>只有「入池」内容能当种子</span>
          <span>只有强相关标签才扩散</span>
          <span>重复内容自动去重</span>
        </div>
      </div>
    </div>
  );
}

export function StrategyConfigPanel() {
  const [prompts, setPrompts] = useState<ConfigFileResponse | null>(null);
  const [rulePacks, setRulePacks] = useState<ConfigFileResponse | null>(null);
  const [walkPolicy, setWalkPolicy] = useState<ConfigFileResponse | null>(null);
  const [err, setErr] = useState<{ p: boolean; r: boolean; w: boolean }>({ p: false, r: false, w: false });

  useEffect(() => {
    let alive = true;
    getConfigQueryPrompts().then((r) => alive && setPrompts(r)).catch(() => alive && setErr((e) => ({ ...e, p: true })));
    getConfigRulePacks().then((r) => alive && setRulePacks(r)).catch(() => alive && setErr((e) => ({ ...e, r: true })));
    getConfigWalkPolicy().then((r) => alive && setWalkPolicy(r)).catch(() => alive && setErr((e) => ({ ...e, w: true })));
    return () => {
      alive = false;
    };
  }, []);

  const pack0 = ((rulePacks?.data?.rule_packs as AnyRec[] | undefined) || [])[0] || null;

  return (
    <div className="strategy-config">
      <div className="cfg-top">
        <p className="muted cfg-top-note">
          下面是<strong>当前生效的全局策略配置</strong>(不是本次 run 的快照),都由人来定、可改;改完下次 run 就按新配置跑。
        </p>
        <Link className="text-button" href="/config">
          <Table2 size={14} /> 查看完整规则表
        </Link>
      </div>

      <ConfigBlock
        icon={<FileText size={15} />}
        title="搜索 Prompt"
        subtitle="发给大模型、用来扩写搜索词的原文"
        editHint="query_prompts.v1.json"
        loading={!prompts && !err.p}
        error={err.p}
      >
        {prompts ? <PromptModule data={prompts.data} /> : null}
      </ConfigBlock>

      <ConfigBlock
        icon={<ShieldCheck size={15} />}
        title="判定规则"
        subtitle="一条内容怎么被判成 入池 / 待复看 / 淘汰"
        editHint="规则包映射配置表.xlsx"
        loading={!rulePacks && !err.r}
        error={err.r}
      >
        <JudgeModule pack={pack0} />
      </ConfigBlock>

      <ConfigBlock
        icon={<Compass size={15} />}
        title="游走规则"
        subtitle="找到一条好内容后,机器怎么顺藤摸瓜找更多"
        editHint="游走策略配置表.xlsx"
        loading={!walkPolicy && !err.w}
        error={err.w}
      >
        {walkPolicy ? <WalkModule data={walkPolicy.data} /> : null}
      </ConfigBlock>
    </div>
  );
}