#!/usr/bin/env node
/**
 * Stage A baseline for chat-task intent routing.
 * Reads existing agent-run events; does not change routing.
 *
 * Usage:
 *   node scripts/report-chat-intent-baseline.mjs
 *   node scripts/report-chat-intent-baseline.mjs --hours 48
 */
import { loadH5Environment } from './load-env.mjs';
import { createDbPool } from '../db.mjs';
import {
  aggregateChatIntentObservations,
  observationFromIntentRoutedData,
} from '../chat-intent-observation.mjs';

loadH5Environment(import.meta.dirname);

function parseHours(argv) {
  const index = argv.indexOf('--hours');
  if (index < 0) return 24;
  const parsed = Number(argv[index + 1]);
  return Number.isFinite(parsed) && parsed > 0 ? parsed : 24;
}

function parseJson(value) {
  if (!value) return {};
  if (typeof value === 'object') return value;
  try {
    return JSON.parse(String(value));
  } catch {
    return {};
  }
}

async function main() {
  const hours = parseHours(process.argv.slice(2));
  const sinceMs = Date.now() - hours * 60 * 60 * 1000;
  const pool = await createDbPool();
  try {
    const [rows] = await pool.query(
      `SELECT event_type, data_json
         FROM h5_agent_run_events
        WHERE created_at >= ?
          AND event_type IN (
            'intent_routed',
            'direct_session_escalated_to_deep_reasoning',
            'direct_escalation_context_injected'
          )
        ORDER BY created_at ASC`,
      [sinceMs],
    );
    const routed = [];
    let escalatedCount = 0;
    let contextInjectedCount = 0;
    for (const row of rows ?? []) {
      if (row.event_type === 'direct_session_escalated_to_deep_reasoning') {
        escalatedCount += 1;
        continue;
      }
      if (row.event_type === 'direct_escalation_context_injected') {
        contextInjectedCount += 1;
        continue;
      }
      routed.push(observationFromIntentRoutedData(parseJson(row.data_json)));
    }
    const summary = aggregateChatIntentObservations({
      routed,
      escalatedCount,
      contextInjectedCount,
    });
    console.log(`==> chat intent baseline last ${hours}h`);
    console.log(JSON.stringify(summary, null, 2));
    if (summary.total === 0) {
      console.log('NOTE  窗口内没有 intent_routed。阶段 A 需要先有聊天流量。');
    } else {
      console.log(
        `NOTE  0.72 兜底 ${summary.ruleFallbackCount}/${summary.total}`
        + ` (${summary.ruleFallbackRatio});`
        + ` 升级 ${summary.escalatedCount};`
        + ` 记忆召回仍走 direct ${summary.memoryRecallDirectRatio};`
        + ` shadow wouldChangeRoute ${summary.wouldChangeRoute}/${summary.shadowObserved}`,
      );
    }
  } finally {
    await pool.end();
  }
}

main().catch((err) => {
  console.error(err instanceof Error ? err.message : err);
  process.exitCode = 1;
});