/**
 * 统一报价 A2 · 替代选型 —— 活动包代码入口(ADR-004)。
 * loop 活动:调度权归 AI;本文件只做视图流控与「差异没核清不放行」的把关呈现。
 */
import { defineActivity } from '@sdk';
import type { ActivityBase, ActivityOutcome } from '@sdk';

const SHORTLIST = 'quote_alternative.shortlist';
const BENCHMARK = 'quote_alternative.benchmark';

export default defineActivity({
  name: 'quote-alternative',
  paradigm: 'loop',

  async run(base: ActivityBase): Promise<ActivityOutcome> {
    const shortlist = await base.ledger.read(SHORTLIST);
    const benchmark = await base.ledger.read(BENCHMARK);
    // 差异没核清的不放行 —— 禁区的机检形态
    const unclear = benchmark.filter((r) => String(r['risk'] ?? '').trim() === '');

    await base.interaction.pushView([
      {
        t: 'kv',
        title: '选型进展',
        items: [
          { k: '原型号', v: String(base.contract.data['originalPn'] ?? '') },
          { k: '初筛候选', v: `${shortlist.length} 颗` },
          { k: '已对标', v: `${benchmark.length} 颗` },
          { k: '差异未核清', v: `${unclear.length} 颗` },
        ],
      },
      {
        t: 'cards',
        title: '候选替代',
        items: benchmark.map((r) => ({
          tag: String(r['grade'] ?? '待定级'),
          title: String(r['candidate_pn'] ?? ''),
          swap: { from: String(r['original_pn'] ?? ''), to: String(r['candidate_pn'] ?? '') },
          big: String(r['grade'] ?? '—'),
          bigLabel: '替代等级',
          note: String(r['risk'] ?? '差异风险未写'),
          tone: String(r['risk'] ?? '').trim() === '' ? 'danger' : 'ok',
        })),
      },
    ]);

    if (benchmark.length < 2) {
      await base.interaction.say(
        shortlist.length === 0 ? '尚未撒网,先拉初筛清单。' : `已初筛 ${shortlist.length} 颗,继续逐条核验分级。`,
        'conclusion',
      );
      return { kind: 'await', reason: '候选不足 2 颗' };
    }

    if (unclear.length > 0) {
      await base.interaction.say(`${unclear.length} 颗候选的差异风险未写清 —— 差异没核清的不放行。`, 'criterion');
      return { kind: 'await', reason: '差异风险未核清' };
    }

    await base.interaction.say('候选已分级、差异与风险已写清,可签字交回发起方。', 'criterion');
    return { kind: 'submit', deliverable: 'benchmark-table', rationale: '2 颗以上分级候选,差异与风险齐备' };
  },
});