import { extractBloodPressurePair } from './health-bp-parse.mjs';
import { looksLikeHealthReportPageRequest, looksLikeHealthQuickAssess } from './health-channel-aliases.mjs';

export { looksLikeHealthReportPageRequest, looksLikeHealthQuickAssess } from './health-channel-aliases.mjs';

export const HEALTH_RULE_INTENTS = Object.freeze({
  BLOOD_PRESSURE: 'blood_pressure',
  WEIGHT: 'weight',
  HEART_RATE: 'heart_rate',
  SPO2: 'spo2',
  TEMPERATURE: 'temperature',
  SLEEP: 'sleep',
  SYMPTOM: 'symptom',
  ASSESS: 'assess',
  ARCHIVE: 'archive',
});

const BP_PAIR = /(\d{2,3})\s*[/／]\s*(\d{2,3})/;

export function matchHealthIdleRules(text) {
  const raw = String(text ?? '').trim();
  if (!raw) return { matched: false, confidence: 0 };

  const bpPair = extractBloodPressurePair(raw);
  if (bpPair?.systolic != null && bpPair?.diastolic != null) {
    return {
      matched: true,
      intent: HEALTH_RULE_INTENTS.BLOOD_PRESSURE,
      confidence: bpPair.source === 'chinese' ? 0.88 : 0.95,
      extracted: { systolic: bpPair.systolic, diastolic: bpPair.diastolic },
    };
  }

  const bp = raw.match(BP_PAIR);
  if (bp) {
    return {
      matched: true,
      intent: HEALTH_RULE_INTENTS.BLOOD_PRESSURE,
      confidence: 0.95,
      extracted: { systolic: Number(bp[1]), diastolic: Number(bp[2]) },
    };
  }

  if (/血压/.test(raw) && /\d{2,3}/.test(raw)) {
    const nums = [...raw.matchAll(/\d{2,3}/g)].map((m) => Number(m[0]));
    if (nums.length >= 2) {
      return {
        matched: true,
        intent: HEALTH_RULE_INTENTS.BLOOD_PRESSURE,
        confidence: 0.8,
        extracted: { systolic: nums[0], diastolic: nums[1] },
      };
    }
  }

  const weight = raw.match(/体重\s*(\d{2,3}(?:\.\d)?)/);
  if (weight) {
    return {
      matched: true,
      intent: HEALTH_RULE_INTENTS.WEIGHT,
      confidence: 0.9,
      extracted: { weight: Number(weight[1]) },
    };
  }

  const hr = raw.match(/(?:心率|脉搏)\s*(\d{2,3})/);
  if (hr) {
    return {
      matched: true,
      intent: HEALTH_RULE_INTENTS.HEART_RATE,
      confidence: 0.9,
      extracted: { hr: Number(hr[1]) },
    };
  }

  const spo2 = raw.match(/(?:血氧|SpO2|spo2)\s*(\d{2,3})/i);
  if (spo2) {
    return {
      matched: true,
      intent: HEALTH_RULE_INTENTS.SPO2,
      confidence: 0.9,
      extracted: { spo2: Number(spo2[1]) },
    };
  }

  const temp = raw.match(/(?:体温|发烧)\s*(3\d(?:\.\d)?)/);
  if (temp) {
    return {
      matched: true,
      intent: HEALTH_RULE_INTENTS.TEMPERATURE,
      confidence: 0.9,
      extracted: { temperature: Number(temp[1]) },
    };
  }

  if (/睡了|睡眠/.test(raw) && /\d/.test(raw)) {
    return { matched: true, intent: HEALTH_RULE_INTENTS.SLEEP, confidence: 0.75, extracted: {} };
  }

  if (/头晕|胸闷|乏力|心慌|头痛|气短/.test(raw)) {
    return { matched: true, intent: HEALTH_RULE_INTENTS.SYMPTOM, confidence: 0.8, extracted: {} };
  }

  if (looksLikeHealthReportPageRequest(raw) || looksLikeHealthQuickAssess(raw)) {
    return { matched: true, intent: HEALTH_RULE_INTENTS.ASSESS, confidence: 0.85, extracted: {} };
  }

  if (/我的档案|历史记录/.test(raw) || (/报告/.test(raw) && !looksLikeHealthReportPageRequest(raw))) {
    return { matched: true, intent: HEALTH_RULE_INTENTS.ARCHIVE, confidence: 0.8, extracted: {} };
  }

  return { matched: false, confidence: 0 };
}

export function shouldForceActionChoice(ruleResult, llm = null) {
  if (ruleResult?.matched && ruleResult.confidence >= 0.75) return false;
  const confidence = Number(llm?.confidence ?? 0);
  const gap = Number(llm?.top1 ?? 0) - Number(llm?.top2 ?? 0);
  if (confidence < 0.75 || gap < 0.15) return true;
  return false;
}

export function shouldRedirectOrdinaryChatToHealth(text) {
  const hit = matchHealthIdleRules(text);
  if (!hit.matched) return false;
  return [
    HEALTH_RULE_INTENTS.BLOOD_PRESSURE,
    HEALTH_RULE_INTENTS.WEIGHT,
    HEALTH_RULE_INTENTS.HEART_RATE,
    HEALTH_RULE_INTENTS.SPO2,
    HEALTH_RULE_INTENTS.TEMPERATURE,
    HEALTH_RULE_INTENTS.SLEEP,
    HEALTH_RULE_INTENTS.SYMPTOM,
    HEALTH_RULE_INTENTS.ASSESS,
  ].includes(hit.intent);
}

export const HEALTH_REDIRECT_COPY =
  '你想记录健康数据吗？健康数据需要在健康助手通道里录入，这样才能保证记录准确并纳入你的健康基线分析。';

const HEALTH_ENTER_PATTERNS = [
  /健康助手/,
  /健康小助手/,
  /进入健康/,
  /健康通道/,
  /录血压/,
];

export function isHealthEnterText(text) {
  const raw = String(text ?? '').trim();
  if (!raw) return false;
  return HEALTH_ENTER_PATTERNS.some((pattern) => pattern.test(raw));
}