import { useEffect, useRef, useState } from 'react';
import type { EventStore } from '../../engine/eventStore';
import type { JevClient } from '../../services/jev';
import { assessRelationships } from '../../engine/scoring';
import type { RelationshipArea } from '../../engine/scoring';
import { AREA_BADGE_MAP, DEFAULT_BADGE } from './badges';
import { ShareCard } from './ShareCard';

interface Props {
  store: EventStore;
  jev: JevClient;
  onReplay: () => void;
  /** 删除全部个人数据（ADR-0004 数据删除权）：purge + 清空进度 + 回到同意门，由 App 编排 */
  onPurge: () => Promise<void>;
}

/**
 * 季终相处线索报告：Jev 逐条核对剧情情境，只提出"待本人核对"的候选线索，
 * 不打人格分数、不做优劣排名（season-design §7：多类别相处方式不能被压成一维分值）。
 */
export function ReportPage({ store, jev, onReplay, onPurge }: Props) {
  const [areas, setAreas] = useState<RelationshipArea[] | null>(null);
  const [error, setError] = useState<string | null>(null);
  const [retry, setRetry] = useState(0);
  const [playerName, setPlayerName] = useState('');
  const purgeDialogRef = useRef<HTMLDialogElement>(null);
  const [purging, setPurging] = useState(false);
  const [purgeError, setPurgeError] = useState<string | null>(null);

  async function confirmPurge() {
    setPurging(true);
    setPurgeError(null);
    try {
      // 成功后 App 把应用切回同意门，本页随之卸载
      await onPurge();
    } catch (e) {
      setPurgeError(e instanceof Error ? e.message : String(e));
      purgeDialogRef.current?.close();
    } finally {
      setPurging(false);
    }
  }

  useEffect(() => {
    let cancelled = false;
    (async () => {
      try {
        const events = await store.list();
        // 最近一次身份登记的称呼（旧数据缺 name 字段时回退空串 → 只显示编号）
        const name = [...events].reverse().find((e) => e.kind === 'profile')?.profile?.name ?? '';
        if (!cancelled) setPlayerName(name);
        const result = await assessRelationships(events, jev);
        if (cancelled) return;
        setAreas(result);
      } catch (e) {
        if (!cancelled) setError(e instanceof Error ? e.message : String(e));
      }
    })();
    return () => {
      cancelled = true;
    };
  }, [store, jev, retry]);

  if (error) {
    return (
      <div className="report">
        <h1>线索报告生成失败</h1>
        <p>{error}</p>
        <button
          className="primary"
          onClick={() => {
            setError(null);
            setAreas(null);
            setRetry((r) => r + 1);
          }}
        >
          生成失败，点此重试
        </button>
        <button className="secondary" onClick={onReplay}>
          回到剧情
        </button>
      </div>
    );
  }

  if (!areas) {
    return (
      <div className="report">
        <h1>档案馆正在整理你的相处线索……</h1>
        <p>正逐条核对剧情情境（本地 Mock 模式不生成伪随机判断）。</p>
      </div>
    );
  }

  // 勋章 = 候选线索证据最多的领域；全无证据时给默认称号
  const signal = (a: RelationshipArea) => a.candidates.reduce((n, c) => n + c.pointIds.length, 0);
  const top = [...areas].sort((a, b) => signal(b) - signal(a))[0];
  const badge = signal(top) > 0 ? (AREA_BADGE_MAP[top.id] ?? DEFAULT_BADGE) : DEFAULT_BADGE;

  return (
    <div className="report">
      <h1>相处线索报告 · 苍梧疑冢</h1>
      <p className="hint">来自剧情情境的初步线索，不是心理诊断、人格优劣排名或匹配成功保证。真实择偶条件须由你另行确认，目前未开放匹配。</p>
      <p className="hint">C-2049{playerName ? `「${playerName}」` : ''}的档案</p>
      <section className="badge-banner">
        <div className="badge-medal">勋</div>
        <div>
          <h2>{badge.title}</h2>
          <p>{badge.flavor}</p>
          {signal(top) > 0 && (
            <p className="badge-note">
              （取自「{top.label}」领域的候选线索，共 {signal(top)} 条情境支持——待你本人核对）
            </p>
          )}
        </div>
      </section>
      <section className="dimension-list">
        {areas.map((a) => (
          <div key={a.id} className="dimension-row">
            <span className="dimension-label">{a.label}</span>
            <span className="dimension-value">
              {a.status === '证据不足'
                ? `剧情情境不足，暂不推断（已采集 ${a.pointIds.length} 条相关情境）`
                : a.candidates.length
                  ? a.candidates.map((c) => `「${c.label}」`).join('、') + ` —— 待本人核对`
                  : '情境已够，暂未出现明确倾向'}
            </span>
          </div>
        ))}
      </section>
      <ShareCard badgeArea={signal(top) > 0 ? top.id : null} areas={areas} playerName={playerName} />
      <button className="secondary" onClick={onReplay}>
        重玩第一季（新轨迹，历史保留）
      </button>
      <section style={{ marginTop: 48, borderTop: '1px solid rgba(201,219,203,.2)', paddingTop: 24 }}>
        <h2 style={{ fontSize: 18, color: '#f1eee3' }}>数据与隐私</h2>
        <p className="hint" style={{ maxWidth: 560 }}>
          剧情进度与行为记录保存在本机；配置在线分析服务时，相关选择与讲述文本会发送至该服务用于线索核对。删除会清空本机记录，不代表撤回已经完成的远程处理。私人幻境路径和结尾心愿不参与画像。
        </p>
        <button className="secondary" onClick={() => purgeDialogRef.current?.showModal()}>
          删除全部数据
        </button>
        {purgeError && <p className="scene-error">删除失败：{purgeError}</p>}
        <dialog
          ref={purgeDialogRef}
          aria-labelledby="purge-title"
          style={{
            background: 'rgba(13,25,23,.98)',
            color: '#e6eae0',
            border: '1px solid rgba(201,219,203,.34)',
            borderRadius: 3,
            padding: '24px 28px',
            maxWidth: 480,
          }}
        >
          <h3 id="purge-title" style={{ marginTop: 0 }}>
            确定删除全部数据？
          </h3>
          <p style={{ lineHeight: 1.8 }}>
            此操作不可恢复，所有剧情进度、相处线索、讲述内容将被永久删除，且不提供导出留档。
            删除后应用将回到初始的告知与同意页面，如同首次安装。
          </p>
          <div style={{ display: 'flex', gap: 12, marginTop: 20, flexWrap: 'wrap' }}>
            <button className="secondary" disabled={purging} onClick={confirmPurge}>
              {purging ? '正在删除……' : '确认永久删除'}
            </button>
            <button className="secondary" disabled={purging} onClick={() => purgeDialogRef.current?.close()}>
              取消
            </button>
          </div>
        </dialog>
      </section>
    </div>
  );
}